FLAT COAXIAL FINNED HYBRID INDOOR HEAT EXCHANGER FOR AIR CONDITIONING SYSTEMS
Patent Information
- Application Number
- TR202613423
- Authority / Receiving Office
- TR · TR
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-08-07
- Publication Date
- 2026-08-21
Smart Images
Figure 00000011_0000
Abstract
Description
1 TARIFF FLAT COAXIAL FINNED HYBRID INTERIORS FOR AIR CONDITIONING SYSTEMS UNIT HEAT EXCHANGER Technical Area The invention is for use in heating, ventilation and air conditioning (HVAC) systems. improved, both direct expansion (DX) refrigerants and hydronic systems Heat transfer of fluids on the same shell, simultaneously or independently 10 flat coaxial fin hybrid for air conditioning systems that enables it to do so. This relates to the indoor unit heat exchanger. The Infrastructure of the Invention Heating, ventilation and air conditioning systems; in residential and commercial buildings, in industrial facilities, healthcare buildings, educational institutions and many similar living spaces in the area, ambient temperature, relative humidity and air quality at desired values It has been widely used for many years in order to be able to store energy. Today, energy increasing efficiency, reducing carbon emissions and improving user comfort 20 In line with efforts to upgrade air conditioning systems The equipment used is constantly being improved, especially heat exchanger technologies. Significant research is being conducted on this subject. In current applications, indoor temperature control is basically based on two different system architectures. 25 This is achieved through direct expansion (DX) air conditioning systems. The first of these is direct expansion (DX) air conditioning systems, the second is... These are hydronic fan coil systems. In direct expansion systems, the air comes from the compressor. The refrigerant circulates directly within the indoor unit coil, distributing heat through the room air. It carries out the exchange. In hydronic systems, a central heat pump or Water or water-glycol mixture fluid conditioned by the boiler, piping system 30 The heat is delivered to the indoor unit battery via this route and heat transfer occurs with the room air. is being carried out. While both systems have yielded successful results within their respective fields of application, they differ. 2 because they have similar working principles, they work together in the same area. Various technical and economic problems arise when their use is requested. Especially in buildings where high comfort expectations are required, both hydronic systems... from the balanced climate control advantages it provides, as well as direct expansion systems The aim is to take advantage of the ability to react quickly. However, with the current technology, this 5 The need is met by installing two separate indoor units within the same space. In this case, one is a fan coil unit used for the hydronic system, and the other is a direct coil unit. Installation of two different devices, including the indoor unit used for the expansion air conditioning system. This needs to be done. As a result, the initial investment cost increases, and the assembly costs are 10. The duration is extended, additional piping is needed, maintenance procedures become more difficult, and This creates aesthetically undesirable appearances, especially in interior spaces. Similarly... Due to the volume occupied by two separate devices at the same time, significant placement is required in architectural design. problems are emerging. In the current state of the art, coaxial heat exchangers are mostly used nested within each other. It consists of placed cylindrical tubes and has high pressure resistance. for this reason, especially in outdoor units, in liquid-liquid or liquid-gas applications. These types of heat exchangers provide highly efficient heat transfer between fluids. Although they can provide sufficient air pressure, their cylindrical external geometry prevents them from providing enough pressure on the air side. It cannot create a heat transfer surface. Therefore, it operates directly with the room air. They are not widely used in battery units. In contrast, traditional air conditioning evaporators and fan coils used today... batteries, made of round copper tubes and fins placed on these tubes 25 These structures are only suitable for the circulation of a single fluid. It is designed to contain both direct expansion coolant and cooling fluid within the same battery. When attempting to use hydronic fluid together, the fluid paths control becomes more difficult, unwanted heat transfers occur, and system efficiency decreases. is negatively affected. 30 On the other hand, solutions that can meet the need for hybrid operation in existing systems. Despite their existence, a significant portion of these are two separate batteries within the same housing. It is based on the principle of placing them side by side inside. This approach is the device 3 increased dimensions, increased air resistance, increased production costs This causes the structure to rise and makes assembly processes more difficult. Furthermore, there are two different Thermal interactions between the batteries complicate the control system. and can reduce work efficiency. In addition, the increasing energy efficiency standards in indoor spaces capable of providing higher air conditioning performance with lower energy consumption. This increases the need for compact solutions, especially for different devices operating from a single indoor unit. The implementation of operating modes is beneficial for both manufacturers and end-users. This will provide significant advantages in this regard. 10 For these reasons, it can be used in both direct expansion and hydronic systems, in a single unit. the circulation of two different fluids in isolation from each other within a battery structure It has a compact structure that provides a high heat transfer surface on the air side. 15 assembly, cost, volume and performance problems encountered in existing systems A new indoor unit heat exchanger was needed that could eliminate this problem. Considering the aforementioned shortcomings encountered in the current technology, both direct Two different types of systems that can be used in both expansion (DX) systems and hydronic systems. 20 enabling high heat transfer performance and eliminating the need for an additional indoor unit. A new heat exchanger structure was needed that eliminates this problem. The subject of the invention... This is a hybrid indoor unit heat exchanger with flat coaxial fins for air conditioning systems. It was developed to meet the need and addresses many issues encountered in existing technology. It addresses structural and functional deficiencies. 25 The invention primarily aims to achieve both within a single indoor unit housing and a single coil block. both direct expansion (DX) coolant and hydronic system fluid It has been made possible to use it. Thus, in the previous technique, for hybrid use... Two separate indoor units, two separate batteries, and additional mounting components required. 30 The system has been simplified by using a single battery structure instead. This allows for both The device's size has been reduced and assembly procedures have been simplified. Thanks to the flat coaxial tube geometry used in the invention, conventional 4 The inadequate air-side heat transfer observed in cylindrical coaxial heat exchangers is significant. This is largely eliminated. The flat shape of the outer pipe and the location on its outer surface Thanks to its fin structure, the surface area in contact with the air is increased, making it more efficient. Heat transfer is achieved. At the same time, resistance to airflow is created. By reducing these, the air-side performance of the system is improved. 5 Another important advantage offered by the invention is the isolated flow of two different fluids. It allows fluids to circulate within its pathways. Thanks to this structure, fluids can move freely. This prevents them from negatively affecting each other, facilitates control, and ensures the system's stability. It is possible for the system to adapt to different working scenarios. Thus, the system is 10 only in direct expansion mode, only in hydronic mode, or according to application requirements. depending on the operating conditions where both fluids are used together It can be operated. The invention also allows for the operation of both an air conditioner indoor unit and a fan coil unit with a single battery structure. It offers a common solution that can be used in applications. This situation in production while facilitating standardization in processes, assembly and maintenance operations are more practical. It contributes to making this possible. At the same time, within the device... Reducing the number of components used results in a more compact system. and helps to reduce the initial investment cost. 20 Thanks to its hybrid structure, the invention is suitable for use in air conditioning systems. Flexibility is increased, and different operational needs can be met with a single indoor unit. and the loss of space resulting from the use of separate devices in the current technology, assembly The difficulty and system complexity are significantly eliminated. Thus, the invention 25 an improved version of existing heat exchanger solutions, both structurally and functionally. It offers an alternative. The structural and characteristic features and all the advantages of the invention are given in the figures below. And thanks to the detailed explanation written with references to these figures, it becomes clearer. 30 This will be understood as such, and therefore the evaluation will be based on these forms and details. This should be done taking the explanation into consideration. Figures that Aid in Explaining the Invention The invention will be described by referring to the attached figures, thus outlining the technical aspects of the invention. This will be understood more clearly. However, the purpose of this is to explain the invention with these specific arrangements. It is not about limiting. On the contrary, it is about limiting the scope of the invention as defined by the accompanying claims. 5 including all alternatives, modifications and equivalencies that could be incorporated. is intended. The details shown are only the preferred aspect of the present invention. shown for the purpose of explaining the arrangements and both the methods the most useful shaping of both the rules and conceptual features of the invention It should be understood that they are presented to provide a readily understandable definition. These 10 in the drawings; Figure 1. Hybrid indoor unit with flat coaxial fins for air conditioning systems. appearance of the heat exchanger References that aid in the explanation of the invention. 1. Inner tube 2. Outer pipe 3. Winglets 20 4. Gas inlet line 5. Gas outlet line 6. Water inlet line 7. Water outlet line 8. Serpentine heat exchanger (battery) block 25 Disclosure of the Invention This detailed description explains that the invention concerns flat coaxial cables for air conditioning systems. This relates to finned hybrid indoor unit heat exchangers and is intended solely to help better understand the subject. 30 This is explained in a way that is geared towards and does not create any limiting effects. The invention in question; • inner tube that enables the transport of gas fluid (1), 6 • outer pipe (2) that surrounds the inner pipe (1) and enables the circulation of hydronic fluid, • Fins that increase the heat transfer surface between the air and the heat exchanger (3), • Gas inlet line providing the entry of direct expansion (DX) gas fluid into the heat exchanger. (4), • Gas outlet 5 that allows direct expansion (DX) gas fluid to exit the heat exchanger. line (5), • Water inlet line (6) that provides the entry of hydronic fluid into the heat exchanger. • water outlet line (7) that allows the hydronic fluid to exit the heat exchanger. • Serpentine with coaxial structure formed by inner pipe (1) and outer pipe (2) The heat exchanger (battery) block consists of (8) parts. 10 The subject of the invention is a hybrid indoor unit with flat coaxial fins for air conditioning systems. its heat exchanger, with a finned coil structure similar to that used in traditional air conditioning evaporators. The fan coil battery structure and coaxial tube technology are combined in a single serpentine heat exchanger. It has a hybrid heat exchanger structure that brings together (battery) blocks. This 15 In this context, the classic cylindrical coaxial pipe structure is transformed into a flat geometry. Fins (3) are placed on its outer surface and thus within the same heat exchanger structure direct expansion (DX) system fluid, hydronic system fluid, and ambient air A hybrid indoor unit heat exchanger capable of transferring heat between them has been created. The inner pipe (1) and the outer pipe (2) are placed so that they are concentric with each other. It forms a coaxial structure. Inner tube (1), direct expansion (DX) system while creating a flow channel for the transport of the fluid, the inner pipe (1) and the outer pipe (2) The area between them is a secondary flow for the circulation of the hydronic system fluid. It forms a channel. The outer pipe (2) has a flat outer surface that is in contact with the air. It is designed to have a specific geometry, and on the said outer surface The fins (3) are located. The fins (3) extend along the flat outer tube (2). The serpentine heat exchanger (battery) block (8) is located on it. The inner tube (1) shall have a smooth or grooved surface geometry of 30 It can be formed. If a grooved structure is preferred, only the inner surface of the inner pipe (1) or its inner and outer surfaces may have a grooved geometry. The grooved surface of the inner pipe (1) geometry, heat between direct expansion (DX) system fluid and inner pipe (1) It can be used to increase the efficiency of the transfer. 7 The subject of the invention is a hybrid indoor unit with flat coaxial fins for air conditioning systems. the heat exchanger mixes the direct expansion (DX) system fluid with the hydronic system fluid. Independent flow paths within the serpentine heat exchanger (battery) block (8) It works in a way that allows it to circulate throughout. During the operation of the system... The gas fluid used in the direct expansion (DX) system is supplied via the gas inlet line (4) 5 is sent to the inner tube (1) and follows the serpentine structure along the inner tube (1) It is moving forward. The gas fluid moves around it as it moves inside the inner tube (1). by exchanging heat through the pipe surfaces via the gas outlet line (5) It is leaving the heat exchanger. However, the hydronic system fluid is transferred through the water inlet line (6) to the outside pipe (2) the flow is directed into it and created between the inner pipe (1) and the outer pipe (2). It circulates within the serpentine heat exchanger (battery) block (8) throughout the region. The hydronic fluid flows through the outer pipe (2) without mixing with the inner pipe (1) It continues to flow independently and 15 from the system via the water outlet line (7). Thus, two different fluids can physically interact within the same heat exchanger structure. any fluid mixture while circulating in isolated flow paths It carries out its work before it happens. Direct expansion (DX) system fluid circulating through inner pipe (1) and inner pipe (1) and 20 Hydronic system fluid circulating between the outer pipe (2) depends on the application requirement They can be circulated simultaneously or independently. Heat transfer takes place along the inner tube (1) and outer tube (2), serpentine heat exchanger Through the fins (3) placed on the (battery) block (8) 25 It is transferred. The fins (3) increase the total surface area in contact with the air. more efficient heat transfer between the air and the heat exchanger This ensures that the indoor air reaches the desired temperature in a shorter time. It contributes to the delivery of air. Thanks to its flat coaxial structure, airflow, Fins arranged more regularly than traditional cylindrical tube geometries (3) 30 This allows the air to pass through, which reduces air resistance. and contributes to improving heat transfer performance. Serpentine heat exchanger Air circulation through the (battery) block (8) is carried out inside the heat exchanger. This is accomplished through the standard fan coil fan located in the unit. 8 The invention applies only to direct expansion (DX) systems, depending on the application requirement, Hybrid operation using only a hydronic system or a combination of both systems. It can be operated in a single system. This allows for different climate control scenarios to be addressed with a single system. Compatibility can be achieved via the serpentine heat exchanger (battery) block (8), the same indoor unit 5 It allows for the use of two different air conditioning systems inside. Flat coaxial tube structure located inside serpentine heat exchanger (battery) block (8), the independent circulation of gaseous fluid and hydronic fluid while providing efficient heat transfer to the ambient air via fins (3) 10 It achieves this. Thus, the invention enables both direct expansion and displacement heat exchangers with a single heat exchanger structure. and a hybrid indoor unit solution that can be used in hydronic air conditioning systems. by offering solutions to the space requirements, additional equipment usage, and assembly issues encountered in existing systems. Contributing to overcoming technical problems related to complexity and system integrity. It provides. 15 Each request mentions a reference number following the technical specifications mentioned, which Reference numbers have been used solely to facilitate understanding of the requests. Therefore, these are indicated with these reference numbers for illustrative purposes only. It should not be thought that any of the elements limit its scope. 20 A technical expert can assess the novelty of the invention and similar structures. by using and / or demonstrating this structure in the relevant technique It is clear that this can be applied to other fields with similar purposes. Therefore, such a 25 of the criteria for structures is innovation and especially exceeding the known state of the art. It is also obvious that he will be deprived of it.
Claims
9 REQUESTS 1. The invention describes a hybrid indoor unit with flat coaxial fins for air conditioning systems. It relates to the heat exchanger, and its characteristics are: • inner pipe (1) that enables the transport of gas fluid, 5 • outer pipe surrounding the inner pipe (1) and enabling circulation of hydronic fluid (2), • Fins that increase the heat transfer surface between the air and the heat exchanger (3), • Gas inlet that allows direct expansion (DX) gas fluid to enter the heat exchanger. line (4), 10 • Gas that allows direct expansion (DX) gas to exit the heat exchanger exit line (5), • Water inlet line (6) that provides the entry of hydronic fluid into the heat exchanger. • water outlet line (7) that allows the hydronic fluid to exit the heat exchanger. • Coaxial structure formed by the inner pipe (1) and the outer pipe (2) serpentine 15 The heat exchanger (battery) block (8) is characterized by its parts.
2. The invention describes a hybrid indoor unit with flat coaxial fins for air conditioning systems. The heat exchanger's operating method and its characteristic is; 20 • direct expansion (DX) system fluid through the gas inlet line (4) inside conveying into the pipe (1), • hydronic system fluid through water inlet line (6) to inner pipe (1) and outer pipe (2) to transmit to the flow region between, • Direct expansion (DX) system fluid and hydronic system fluid 25 being routed in independent flow paths, • fluids and medium through inner pipe (1), outer pipe (2) and fins (3) heat transfer between the air, • through the gas outlet line (5) of the direct expansion (DX) system fluid, The hydronic system fluid passes through the heat exchanger via the water outlet line (7) 30 Extraction involves processing steps.
3. Hybrid indoor air conditioners with flat coaxial fins for air conditioning systems according to Claim 1. It relates to the unit heat exchanger and its feature is that the inner pipe (1) is inside the outer pipe (2). Its central positioning gives it a coaxial structure.
4. Hybrid indoor air conditioners with flat coaxial fins for air conditioning systems according to Claim 1. It relates to the unit heat exchanger and its feature is that the fins (3) are on the outer pipe (2). It is positioning. 5 5. Hybrid indoor air conditioners with flat coaxial fins for air conditioning systems according to Claim 1. It relates to the unit heat exchanger and its feature is; hydronic between the inner pipe (1) and the outer pipe (2). The system has a flow region in which the fluid circulates.
6. Hybrid indoor air conditioners with flat coaxial fins for air conditioning systems according to Claim 2. The unit heat exchanger's operating method is characterized by its direct expansion (DX) system. It is the circulation of the fluid through the inner pipe (1).
7. Hybrid indoor air conditioning units with flat coaxial fins according to Claim 2. The unit heat exchanger's operating method is characterized by its direct expansion (DX) system. the fluid and the hydronic system fluid simultaneously or independently It is the circulation of blood.
8. Hybrid indoor air conditioning units with flat coaxial fins according to Claim 2. The unit heat exchanger is a working method characterized by the transfer of hydronic system fluid from the inner pipe to the heat exchanger. It is circulated in the flow region located between (1) and the outer pipe (2). Hybrid indoor air conditioners with flat coaxial fins for air conditioning systems according to Claim 9. This relates to the unit heat exchanger, and its feature is that it can directly heat 25 within a single indoor unit. both expansion (DX) system fluid and hydronic system fluid It contains a serpentine heat exchanger (battery) block (8) suitable for circulation. Hybrid indoor air conditioners with flat coaxial fins for air conditioning systems according to Claim 10. It relates to the unit heat exchanger and its feature is; the inner surface of the inner pipe (1) or the inner and outer 30 their surfaces have a grooved geometry.