Heat exchange structure, heat exchange control method and fresh air system

Abstract

The present application relates to a heat exchange structure, a heat exchange control method and a fresh air system, wherein the heat exchange structure includes: a refrigerant pipe and a fresh air duct, wherein the refrigerant pipe has a hollow channel for transporting refrigerant in the hollow channel; the fresh air duct is a spiral channel, the spiral channel is wound around the refrigerant pipe, and the bottom of the spiral channel is the outer wall of the refrigerant pipe; the two ends of the spiral channel are an air inlet and an air outlet, respectively; the spiral channel is provided with at least one heat dissipation fin, the heat dissipation fin is wound around the outer wall of the refrigerant pipe, and the winding direction of the heat dissipation fin is consistent with the winding direction of the spiral channel. The heat exchange structure provided in the embodiment of the present application can achieve sufficient heat exchange between the air flowing through the fresh air duct and the heat dissipation fin through a simple structure.

Description

Technical Field

[0001] The present application relates to the technical field of fresh air equipment, and in particular to a heat exchange structure, a heat exchange control method and a fresh air system. Background Art

[0002] With rising environmental awareness and increasing demands for indoor comfort, the demand for indoor air quality is also increasing. For example, installing fresh air systems indoors is a common practice. However, independent fresh air systems are relatively expensive and difficult to install. Since air conditioning is now common in homes, fresh air air conditioning, as a healthy and environmentally friendly air conditioning system, has gained widespread adoption in recent years.

[0003] When using existing fresh air air conditioners, the applicant found that the fresh air air conditioners on the current market usually adopt complex heat exchange systems and complex structures, which leads to high equipment costs. This limits the promotion of fresh air air conditioners and prevents them from being widely popularized. Summary of the Invention

[0004] The present application provides a heat exchange structure, a heat exchange control method and a fresh air system to solve the problem of complex heat exchange structure in existing fresh air air conditioners.

[0005] In a first aspect, the present application provides a heat exchange structure, a refrigerant pipe and a fresh air duct, wherein the refrigerant pipe has a hollow channel for transporting refrigerant in the hollow channel;

[0006] The fresh air duct is a spiral channel, which is wound around the refrigerant pipe, and the bottom of the spiral channel is the outer wall of the refrigerant pipe; the two ends of the spiral channel are respectively an air inlet and an air outlet;

[0007] The spiral channel is provided with at least one heat dissipation fin, and the heat dissipation fin is wound on the outer wall of the refrigerant pipe, and the winding direction of the heat dissipation fin is consistent with the winding direction of the spiral channel.

[0008] Optionally, the heat dissipation fin is a hollow structure, and the hollow structure of the heat dissipation fin is connected to the hollow channel in the refrigerant pipe.

[0009] Optionally, the heat dissipation fin includes: a flow control plate and a driving device, wherein:

[0010] The flow control plate is arranged between the hollow structure and the hollow channel of the refrigerant pipe, and the driving device is arranged on the inner wall of the refrigerant pipe and connected to the flow control plate; the driving device can drive the flow control plate to move on the inner wall of the refrigerant pipe to adjust the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

[0011] Optionally, a lateral guide parallel to the axis of the refrigerant pipe is provided on the inner wall of the refrigerant pipe;

[0012] The flow control plate is connected to the lateral guide in a laterally sliding manner. Under the drive of the driving device, the flow control plate can slide forward or backward along the lateral guide on the inner wall of the refrigerant pipe to block the hollow structure and adjust the connection area between the hollow structure and the hollow channel of the refrigerant pipe.

[0013] Optionally, a spiral guide member is provided on the inner wall of the refrigerant pipe in the same winding direction as the heat dissipation fins;

[0014] The flow control plate can slide along the spiral guide. Under the drive of the driving device, the flow control plate can rotate forward or backward along the spiral guide on the inner wall of the refrigerant pipe to block the hollow structure and adjust the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

[0015] Optionally, the hollow structure is provided with a deflection guide in a direction perpendicular to the axis of the refrigerant pipe;

[0016] The flow control plate is movably connected to the deflection guide, and the driving device is arranged in the hollow structure and connected to the flow control plate; the driving device can drive the flow control plate to deflect on the intersection surface of the hollow structure and the hollow channel, thereby blocking the hollow structure and adjusting the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

[0017] Optionally, there are at least two heat dissipating fins, and a flow control plate is provided in each heat dissipating fin. All flow control plates are connected to the same driving device, and the driving device is used to simultaneously drive the flow control plates in at least two heat dissipating fins to move on the inner wall of the refrigerant pipe at the same time.

[0018] Optionally, there are at least two heat dissipation fins, the at least two heat dissipation fins are at different heights on the outer wall of the refrigerant pipe, and the volumes of the hollow structures inside the at least two heat dissipation fins are different;

[0019] The driving device in each heat dissipation fin independently controls the flow control plate in the corresponding heat dissipation fin to move on the inner wall of the refrigerant pipe.

[0020] Optionally, the heat exchange structure also includes: a heat exchange controller, which is connected to the driving device in the heat exchange fin, and is used to receive an increase heat exchange instruction or a decrease heat exchange instruction, and when the heat exchange instruction is increased, controls the communication area between the hollow structure of at least one heat exchange fin and the hollow channel of the refrigerant pipe to increase, and when the heat exchange instruction is decreased, controls the communication area between the hollow structure of at least one heat exchange fin and the hollow channel of the refrigerant pipe to decrease.

[0021] In a second aspect, the present application provides a heat exchange control method, which is applied to a fresh air system including the aforementioned heat exchange structure including a heat exchange controller, wherein the air outlet humidity sensor of the heat exchange structure,

[0022] The heat exchange control method comprises:

[0023] When the fresh air system is running, collecting humidity data collected by the humidity sensor;

[0024] Determining whether the humidity data is greater than a preset dew point humidity threshold;

[0025] If the humidity data is greater than a preset dew point humidity threshold, a heat exchange reduction instruction is generated and sent to the heat exchange controller so that the heat exchange controller controls the increase of the communication area between the hollow structure of at least one heat dissipation fin and the hollow channel of the refrigerant pipe.

[0026] Optionally, the fresh air system includes a fan and a compressor, the fan is connected to the fresh air duct, and the refrigerant pipeline is connected to the compressor; the method further includes:

[0027] Obtain the fan speed, the compressor power, and the indoor temperature corresponding to the fresh air system;

[0028] If the humidity data is greater than a preset dew point humidity threshold, the speed of the fan is controlled to decrease, and the power of the compressor is increased to reduce the temperature of the refrigerant so as to increase the dehumidification amount of the fresh air.

[0029] In a third aspect, the present application provides a fresh air system, comprising the heat exchange structure provided in any of the aforementioned embodiments, wherein the fresh air system comprises a fan and a compressor, the fan is connected to the fresh air duct, and the refrigerant pipe is connected to the compressor.

[0030] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0031] When air needs to flow through the room, it can pass through the fresh air duct. Inside the duct, the air can fully contact the heat sink fins. The heat sink fins are fixed to the outer wall of the refrigerant pipe and can transfer the temperature of the refrigerant flowing through the refrigerant pipe to the heat sink fins, thereby exchanging heat with the air flowing through the fresh air duct. In addition, due to the spiral structure of the fresh air duct and the spiral structure of the heat sink fins, the air can fully contact the heat sink fins for heat exchange.

[0032] Therefore, the heat exchange structure provided in the embodiment of the present application can achieve sufficient heat exchange between the air flowing through the fresh air duct and the heat dissipation fins through a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Figure 1 A schematic diagram of a heat exchange structure provided in an embodiment of the present application;

[0037] Figure 2 Another schematic diagram of the heat exchange structure provided in an embodiment of the present application;

[0038] Figure 3 A schematic cross-sectional view of a heat exchange structure provided in an embodiment of the present application;

[0039] Figure 4 A schematic cross-sectional view of a refrigerant pipeline according to an embodiment of the present application;

[0040] Figure 5 A schematic cross-sectional view of the refrigerant pipeline when the flow control plate provided in an embodiment of the present application is located at a first position on the lateral guide member;

[0041] Figure 6 A schematic cross-sectional view of the refrigerant pipeline when the flow control plate provided in an embodiment of the present application is located at the second position on the lateral guide member;

[0042] Figure 7 A schematic cross-sectional view of the refrigerant pipeline when the flow control plate provided in an embodiment of the present application is located in a first position on the spiral guide member;

[0043] Figure 8 A schematic cross-sectional view of the refrigerant pipeline when the flow control plate provided in an embodiment of the present application is located in the second position on the spiral guide member;

[0044] Figure 9 A schematic cross-sectional view of a heat exchange structure with high heat dissipation fins and low heat dissipation fins provided in an embodiment of the present application;

[0045] Figure 10 A schematic flow chart of a heat exchange control method provided in an embodiment of the present application;

[0046] 100. Heat exchange structure; 200. Fresh air duct; 300. Refrigerant pipe; 201. Cylindrical outer wall; 202. Spiral side wall; 203. Air inlet; 204. Air outlet; 400. Heat dissipation fins; 401. Hollow structure; 301. Hollow channel; 302. Inner wall; 11. Flow control plate; 12. Drive device; 13. Lateral guide; 14. Spiral guide; 402. High heat dissipation fins; 403. Low heat dissipation fins. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] In order to solve the technical problem of complex heat exchanger structure in the prior art, the present application provides a heat exchanger structure that can achieve heat exchange and better heat exchange control with a simple structure.

[0050] Figure 1 A schematic diagram of a heat exchange structure provided in an embodiment of the present application; Figure 2 Another schematic diagram of the heat exchange structure provided in an embodiment of the present application; Figure 3 This is a schematic cross-sectional view of the heat exchange structure provided in an embodiment of the present application.

[0051] See also Figure 1-Figure 3 As shown, the heat exchange structure 100 provided in the embodiment of the present application may include: a refrigerant pipe 300 and a fresh air duct 200 , wherein the fresh air duct 200 is located on the outer wall of the refrigerant pipe 300 .

[0052] In the examples of this application, see Figure 2 As shown, the refrigerant pipe 300 has a hollow channel 301 for transporting refrigerant in the hollow channel. The refrigerant can be transported in the hollow channel under the action of other pumping equipment. The refrigerant in the refrigerant pipe 300 can remove heat from the air in the fresh air duct 200.

[0053] See also Figure 2 and Figure 3 As shown, in the embodiment of the present application, the fresh air duct 200 is a spiral channel, which is wound around the refrigerant pipe 300. The fresh air duct 200 is formed by a combination of a spiral side wall 202 and a cylindrical outer wall 201, wherein the spiral side wall 202 is wound around the refrigerant pipe 300, and the cylindrical outer wall 201 surrounds the end of the spiral side wall 202 away from the refrigerant pipe. In addition, the spiral side wall 202 is sealed and fixed to the outer wall of the refrigerant pipe 300, and the cylindrical outer wall 201 is sealed and fixed to the spiral side wall 202. In the embodiment of the present application, the sealing and fixing can be performed by welding.

[0054] Through the above arrangement, the bottom of the spiral channel can be made to be the outer wall of the refrigerant pipe. In addition, the spiral channel has an air inlet 203 and an air outlet 204 at each end. When fresh air is needed indoors, outdoor air can be blown into the fresh air duct 200 through the air inlet 203. Within the spiral channel of the fresh air duct 200, heat is exchanged with the outer wall of the refrigerant pipe 300. The air after heat exchange can be blown out of the air outlet 204 and then transported into the room through the pipe, so that the air entering the room matches the indoor temperature.

[0055] In the embodiment of the present application, the spiral channel is provided with at least one heat dissipation fin, such as Figure 3 As shown, 400 in the figure is a heat dissipation fin, and Figure 3 In the embodiment, there are four heat dissipation fins 400 . The heat dissipation fins 400 are wound on the outer wall of the refrigerant pipe 300 , and the winding direction of the heat dissipation fins 400 is consistent with the winding direction of the spiral channel of the fresh air duct 200 .

[0056] When the heat exchange structure provided in the embodiment of the present application is used, see Figure 3As shown, the refrigerant can flow through the refrigerant pipe 300 in direction a in the figure, and the air can flow through the fresh air duct 200 in direction b in the figure. In other embodiments, the refrigerant can flow through the refrigerant pipe in the direction opposite to a, and the air can flow through the fresh air duct 200 in direction b in the figure.

[0057] When air needs to flow through the room, it can pass through the fresh air duct 200. Inside the fresh air duct 200, the air can fully contact the heat dissipation fins 400 inside the fresh air duct. The heat dissipation fins 400 are fixed to the outer wall of the refrigerant pipe 300 and can transfer the temperature of the refrigerant flowing through the refrigerant pipe 300 to the heat dissipation fins 400, thereby exchanging heat with the air flowing through the fresh air duct 200. In addition, due to the spiral structure of the fresh air duct and the spiral structure of the heat dissipation fins, the air can fully contact the heat dissipation fins for heat exchange.

[0058] Therefore, the heat exchange structure provided in the embodiment of the present application can achieve sufficient heat exchange between the air flowing through the fresh air duct and the heat dissipation fins through a simple structure.

[0059] Figure 4 This is a schematic diagram of the cross-sectional structure of the refrigerant pipeline provided in the embodiment of the present application. In the figure, the refrigerant pipeline is cross-sectionally viewed on a plane passing through the axis of the refrigerant pipeline. It can be seen that Figure 4 In the embodiment, the interior of the heat dissipation fin 400 is a hollow structure 401, and the hollow structure 401 can be connected to the hollow channel 301 in the refrigerant channel. Figure 4 In the embodiment, along the extension direction of the inner wall 302 of the hollow structure 301 , the hollow structure 401 may be a groove on the inner wall 302 .

[0060] In the embodiment of the present application, the shape of the hollow structure 401 can match the shape of the heat dissipation fin 400. Figure 4 In the figure, the cross section of the heat dissipation fin 400 is triangular, so the hollow structure 401 can be a triangular groove.

[0061] In other embodiments, when the cross-section of the heat sink fin 400 can be square, cylindrical, or other shapes, the shape of the corresponding hollow structure 401 can match the outer shape of the heat sink fin. The outer wall of the hollow structure 401 maintains the same wall thickness, which means that the shape of the hollow structure 401 can match the outer shape of the heat sink fin.

[0062] In the embodiment of the present application, since the interior of the heat sink 400 is a hollow structure 401, and the hollow structure 401 is connected to the hollow channel 301 in the refrigerant pipe, the refrigerant in the refrigerant pipe can flow through the hollow structure 401 and, through the sidewalls of the hollow structure 401, can fully exchange heat with the air outside the heat sink fins. Compared to solid heat sink fins, the refrigerant can flow through the hollow structure 401, which can increase the contact area between the refrigerant and the heat sink fins during heat exchange, thereby improving heat dissipation efficiency.

[0063] In the embodiment of the present application, in order to further control the heat dissipation efficiency, in the embodiment of the present application, Figure 5 As shown, the heat dissipation fin includes: a flow control plate 11 and a driving device 12, wherein,

[0064] The shape of the flow control plate 11 may match the shape of the hollow structure, and the flow control plate 11 is disposed between the hollow structure and the hollow channel of the refrigerant pipe.

[0065] In order to realize the movement of the flow control plate 11, the driving device 12 can be arranged on the inner wall of the refrigerant pipe 300 and connected to the flow control plate 11; the driving device 12 can drive the flow control plate 11 to move on the inner wall of the refrigerant pipe 300 to adjust the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

[0066] The function of the flow control plate is to fully, partially or not block the hollow structure, thereby controlling the flow of the refrigerant flowing through the hollow structure to achieve control of the efficiency of heat exchange.

[0067] The heat exchange structure provided in the embodiment of the present application can control the flow of refrigerant flowing through the hollow structure 401 in the heat sink 400. When the heat exchange rate needs to be increased, the flow control plate can be controlled to reduce obstruction of the hollow structure, thereby increasing the flow of refrigerant entering the hollow structure and improving heat exchange efficiency. When the heat exchange rate needs to be reduced, the flow control plate can be controlled to increase or even completely obstruct the hollow structure, thereby reducing the flow of refrigerant entering the hollow structure or completely stopping the refrigerant from entering the hollow structure, thereby reducing heat exchange efficiency.

[0068] The specific method of the aforementioned flow control plate can be found in the following embodiments. Figure 5 and Figure 6 As shown in the figure, a lateral guide 13 parallel to the axis of the refrigerant pipe is provided on the inner wall of the refrigerant pipe, and there may be two or more lateral guides 13.

[0069] The flow control plate 11 is slidably connected to the lateral guide 13, and the driving device 12 can drive the flow control plate 11 to move laterally through the connecting rod. In this way, the flow control plate 11 can slide forward along the lateral guide on the inner wall of the refrigerant pipe under the drive of the driving device 12 ( Figure 5 direction of the arrow in the middle) or slide backward ( Figure 5 ), the hollow structure is shielded to adjust the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

[0070] by Figure 5 For example, the width of the hollow structure on the side wall of the refrigerant pipe is L1. Figure 5 The flow control plate is located at the first position on the lateral guide, and the flow control plate 11 is Figure 5 Position shown, along Figure 5 Move to the direction indicated by the arrow Figure 6 When the position shown is Figure 6 The middle flow control plate is located at the second position on the lateral guide. At this time, the flow control plate 11 partially covers the hollow structure. The connecting width between the hollow structure and the hollow channel is L2. At this time, L2 is less than L1, thereby reducing the amount of refrigerant flowing through the hollow structure and reducing the heat dissipation efficiency of the heat dissipation fins.

[0071] The specific method of the aforementioned flow control plate can be found in the following embodiments. Figure 6 and Figure 7 As shown in the figure, a spiral guide 14 is provided on the inner wall of the refrigerant pipe in the same direction as the winding direction of the heat dissipation fins. There can be two or more spiral guides.

[0072] The flow control plate 11 is slidably connected to the spiral guide 14 and can slide along the spiral guide 14. The flow control plate can rotate and advance along the spiral guide on the inner wall of the refrigerant pipe under the drive of the driving device ( Figure 7 in the direction of the arrow) or back ( Figure 7 ), the hollow structure is shielded to adjust the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

[0073] by Figure 7 For example, the width of the hollow structure on the side wall of the refrigerant pipe is L1. Figure 7 The flow control plate 11 is located at the first position on the spiral guide. Figure 7 Position shown, along Figure 7 Move to the direction indicated by the arrow Figure 8 When the position shown is Figure 8The middle flow control plate is located at the second position on the spiral guide. At this time, the flow control plate 11 partially covers the hollow structure. The connecting width between the hollow structure and the hollow channel is L2. At this time, L2 is less than L1, thereby reducing the amount of refrigerant flowing through the hollow structure and reducing the heat dissipation efficiency of the heat dissipation fins.

[0074] The specific form of the aforementioned flow control plate can be referred to the following embodiment. In the embodiment of the present application, the hollow structure is provided with a deflection guide member in a direction perpendicular to the axis of the refrigerant pipe;

[0075] The flow control plate is movably connected to the deflection guide, and the driving device is arranged in the hollow structure and connected to the flow control plate; the driving device can drive the flow control plate to deflect on the intersection surface of the hollow structure and the hollow channel, thereby blocking the hollow structure and adjusting the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

[0076] That is, it is equivalent to setting a rotatable deflection guide at a position where the central control structure is flush with the side wall of the refrigerant pipe 300 to achieve the connection area between the hollow structure and the refrigerant pipe, thereby adjusting the flow rate of the refrigerant entering the hollow structure.

[0077] In the embodiment of the present application, according to the aforementioned heat dissipation fin with flow control plate, at least two heat dissipation fins can be provided in a specific application, see Figure 3 The figure shows four heat sinks. In a specific configuration, each heat sink is provided with a flow control plate, but only one drive device is provided. That is, all flow control plates are connected to the same drive device, which is used to simultaneously drive the flow control plates in at least two heat sinks to move simultaneously on the inner wall of the refrigerant pipe.

[0078] In this way, a set of driving devices can be used to control the flow control plates in all heat dissipation fins, which can facilitate unified control.

[0079] In the embodiment of the present application, according to the aforementioned heat dissipation fin with a flow control plate, in a specific application, at least two heat dissipation fins can be provided, the at least two heat dissipation fins are at different heights on the outer wall of the refrigerant pipe, and the volumes of the hollow structures inside the at least two heat dissipation fins are different. Figure 9As shown in the figure, it includes: one high heat dissipation fin 402 and three low heat dissipation fins 403. As can be seen from the figure, for the high heat dissipation fin 402, since the distance between its edge and the outer wall of the refrigerant pipe is greater than the distance between the low heat dissipation fin 403 and the outer wall of the refrigerant pipe, the high heat dissipation fin 402 extends deeper into the fresh air duct 200, so its contact area with the air in the fresh air duct 200 is larger. In addition, since the hollow structure of the high heat dissipation fin 402 has a larger volume, overall, the high heat dissipation fin 402 has a higher heat exchange efficiency and a better heat exchange effect.

[0080] And in Figure 9 In the illustrated embodiment, the driving device in each heat dissipating fin independently controls the flow control plate in the corresponding heat dissipating fin to move on the inner wall of the refrigerant pipe.

[0081] In order to facilitate the control of heat exchange of the heat exchange fins, in an embodiment of the present application, the heat exchange structure 100 also includes: a heat exchange controller (not shown in the figure), which is connected to the driving device in the heat exchange fins, and is used to receive an increase heat exchange instruction or a decrease heat exchange instruction, and when the heat exchange instruction is increased, the communication area between the hollow structure of at least one heat exchange fin and the hollow channel of the refrigerant pipe is controlled to increase, and when the heat exchange instruction is decreased, the communication area between the hollow structure of at least one heat exchange fin and the hollow channel of the refrigerant pipe is controlled to decrease.

[0082] In other embodiments of the present application, when the heat exchange controller increases the heat exchange instruction, it controls the increase in the area of ​​communication between the hollow structure of each heat sink fin and the hollow channel of the refrigerant pipe. For example, in the initial state, the hollow structures of all heat sink fins are closed. When the heat exchange instruction is increased, the heat exchange controller can first open the communication between the hollow structure of the first heat sink fin and the refrigerant pipe. If the heat exchange requirement is not met, the hollow structures of the second and third heat sink fins are opened in sequence. Conversely, when the heat exchange instruction is decreased, the hollow structures of the heat sink fins can be closed in sequence.

[0083] Furthermore, when both high- and low-heat fins are provided, upon receiving a command to increase heat exchange, the heat exchange amount in the command can be judged. If it is greater than a first preset threshold, the hollow structure of the high-heat fins is activated. Conversely, if the heat exchange amount is less than the first preset threshold, only the hollow structure of the low-heat fins is activated. Furthermore, if the heat exchange amount is greater than a second preset threshold, and the second preset threshold is greater than the first preset threshold, both the hollow structures of the high- and low-heat fins can be activated.

[0084] The present application also provides a heat exchange control method, which can be applied to a fresh air system including the heat exchange structure provided by any of the aforementioned embodiments. In the fresh air system, a humidity sensor can also be provided at the air outlet of the heat exchange structure.

[0085] The heat exchange control method comprises:

[0086] S101, when the fresh air system is running, collecting humidity data collected by the humidity sensor.

[0087] When the indoor air quality is detected to be poor or the user actively starts the fresh air system, the fresh air system will start working and operate at the target speed.

[0088] At this time, the air in the fresh air system will undergo heat exchange along the air inlet in the aforementioned heat exchange structure and then be blown out from the air outlet. The temperature of the fresh air can be controlled by the heat dissipation fins.

[0089] S101, determining whether the humidity data is greater than a preset dew point humidity threshold.

[0090] In the embodiment of the present application, the preset dew point humidity threshold may be 80% of the dew point humidity critical value, so that the humidity can be controlled in advance to avoid reaching the dew point humidity critical value and causing condensation.

[0091] S103: If the humidity data is greater than a preset dew point humidity threshold, a heat exchange reduction instruction is generated and sent to the heat exchange controller, so that the heat exchange controller controls the increase of the communication area between the hollow structure of at least one heat dissipation fin and the hollow channel of the refrigerant pipe.

[0092] As the humidity data at the air outlet increases, it is necessary to increase the refrigerant to exchange heat with the air in the fresh air duct to increase the dehumidification capacity of the fresh air and avoid blowing high-humidity air into the room and forming condensation.

[0093] In other embodiments of the present application, the fresh air system includes a fan and a compressor, the fan is connected to the fresh air duct, and the refrigerant pipe is connected to the compressor; and a temperature sensor can also be provided at the air outlet of the heat exchange structure to collect the temperature of the air at the outlet.

[0094] In addition, the main board of the fresh air system can record a series of data such as the temperature, humidity, fan speed, compressor power, and indoor temperature of the cooled fresh air, and form a historical a priori database to facilitate subsequent adjustments to the fresh air system.

[0095] The method further comprises:

[0096] Obtain the fan speed, the compressor power, and the indoor temperature corresponding to the fresh air system;

[0097] If the humidity data is greater than a preset dew point humidity threshold, the speed of the fan is controlled to decrease, and the power of the compressor is increased to reduce the temperature of the refrigerant so as to increase the dehumidification amount of the fresh air.

[0098] In the embodiment of the present application, in addition to improving the heat exchange efficiency, the dehumidification amount of the air in the heat exchange structure can be increased by reducing the wind speed of the fan and lowering the temperature of the refrigerant, thereby preventing air with high humidity from being blown out of the heat exchange structure and entering the room, causing condensation.

[0099] An embodiment of the present application also provides a fresh air system, including a heat exchange structure as provided in any embodiment, wherein the fresh air system includes a fan and a compressor, the fan is connected to the fresh air duct, and the refrigerant pipe is connected to the compressor.

[0100] 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.

[0101] 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. A heat exchange structure, characterized in that: A refrigerant pipe and a fresh air duct, wherein the refrigerant pipe has a hollow channel for transporting the refrigerant in the hollow channel; The fresh air duct is a spiral channel, which is wound around the refrigerant pipe, and the bottom of the spiral channel is the outer wall of the refrigerant pipe; the two ends of the spiral channel are respectively an air inlet and an air outlet; The spiral channel is provided with at least one heat dissipation fin, the heat dissipation fin is wound on the outer wall of the refrigerant pipe, and the winding direction of the heat dissipation fin is consistent with the winding direction of the spiral channel; The fresh air channel includes a spiral side wall and a cylindrical outer wall. The spiral side wall is wrapped around the refrigerant pipe, and the cylindrical outer wall surrounds the end of the spiral side wall away from the refrigerant pipe. The spiral side wall is sealed and fixed to the outer wall of the refrigerant pipe, and the cylindrical outer wall is sealed and fixed to the spiral side wall.

2. The heat exchange structure according to claim 1, characterized in that: The heat dissipation fins are hollow structures, and the hollow structures of the heat dissipation fins are connected to the hollow channels in the refrigerant pipes.

3. The heat exchange structure according to claim 2, characterized in that: The heat dissipation fins include: a flow control plate and a driving device, wherein: The flow control plate is arranged between the hollow structure and the hollow channel of the refrigerant pipe, and the driving device is arranged on the inner wall of the refrigerant pipe and connected to the flow control plate; the driving device can drive the flow control plate to move on the inner wall of the refrigerant pipe to adjust the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

4. The heat exchange structure according to claim 3, characterized in that: A lateral guide member parallel to the axis of the refrigerant pipe is provided on the inner wall of the refrigerant pipe; The flow control plate is connected to the lateral guide in a laterally sliding manner. Under the drive of the driving device, the flow control plate can slide forward or backward along the lateral guide on the inner wall of the refrigerant pipe to block the hollow structure and adjust the connection area between the hollow structure and the hollow channel of the refrigerant pipe.

5. The heat exchange structure according to claim 3, characterized in that: A spiral guide piece is provided on the inner wall of the refrigerant pipe in the same winding direction as the heat dissipation fin; The flow control plate can slide along the spiral guide. Under the drive of the driving device, the flow control plate can rotate forward or backward along the spiral guide on the inner wall of the refrigerant pipe to block the hollow structure and adjust the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

6. The heat exchange structure according to claim 3, characterized in that: The hollow structure is provided with a deflection guide in a direction perpendicular to the axis of the refrigerant pipe; The flow control plate is movably connected to the deflection guide, and the driving device is arranged in the hollow structure and connected to the flow control plate; the driving device can drive the flow control plate to deflect on the intersection surface of the hollow structure and the hollow channel, thereby blocking the hollow structure and adjusting the communication area between the hollow structure and the hollow channel of the refrigerant pipe.

7. The heat exchange structure according to claim 3, characterized in that: There are at least two heat dissipating fins, and a flow control plate is provided in each of the heat dissipating fins. All the flow control plates are connected to the same driving device, and the driving device is used to simultaneously drive the flow control plates in at least two of the heat dissipating fins to move on the inner wall of the refrigerant pipe at the same time.

8. The heat exchange structure according to claim 3, characterized in that: There are at least two heat dissipation fins, the at least two heat dissipation fins are at different heights on the outer wall of the refrigerant pipe, and the volumes of the hollow structures inside the at least two heat dissipation fins are different; The driving device in each heat dissipation fin independently controls the flow control plate in the corresponding heat dissipation fin to move on the inner wall of the refrigerant pipe.

9. The heat exchange structure according to any one of claims 3 to 8, characterized in that: The heat exchange structure also includes: a heat exchange controller, which is connected to the driving device in the heat exchange fins, and is used to receive an increase heat exchange instruction or a decrease heat exchange instruction, and when the heat exchange instruction is increased, controls the communication area between the hollow structure of at least one heat exchange fin and the hollow channel of the refrigerant pipe to increase, and when the heat exchange instruction is reduced, controls the communication area between the hollow structure of at least one heat exchange fin and the hollow channel of the refrigerant pipe to decrease.

10. A heat exchange control method, characterized in that: Applicable to a fresh air system comprising the heat exchange structure according to claim 9, wherein the humidity sensor at the air outlet of the heat exchange structure is The heat exchange control method comprises: When the fresh air system is running, collecting humidity data collected by the humidity sensor; Determining whether the humidity data is greater than a preset dew point humidity threshold; If the humidity data is greater than a preset dew point humidity threshold, a heat exchange reduction instruction is generated and sent to the heat exchange controller so that the heat exchange controller controls the increase of the communication area between the hollow structure of at least one heat dissipation fin and the hollow channel of the refrigerant pipe.

11. The method according to claim 10, characterized in that The fresh air system includes a fan and a compressor, the fan is connected to the fresh air duct, and the refrigerant pipeline is connected to the compressor; the method further includes: Obtain the fan speed, the compressor power, and the indoor temperature corresponding to the fresh air system; If the humidity data is greater than a preset dew point humidity threshold, the speed of the fan is controlled to decrease, and the power of the compressor is increased to reduce the temperature of the refrigerant so as to increase the dehumidification amount of the fresh air.

12. A fresh air system, characterized in that: Comprising the heat exchange structure according to any one of claims 1 to 9, the fresh air system comprises a fan and a compressor, the fan is connected to the fresh air duct, and the refrigerant pipe is connected to the compressor.

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