Heat recovery coil pipe structure for clean room

Abstract

The utility model discloses a heat recovery coil pipe structure for a clean room in the technical field of heat recovery of a fresh air system, and aims to solve the problem that the heat exchange effect of a heat recovery coil pipe in the prior art is limited by fins. The heat recovery device comprises an air duct and a heat recovery coil pipe arranged in the air duct, the heat recovery coil pipe is composed of a plurality of heat recovery pipes and pipe joints used for communicating the heat recovery pipes to achieve liquid circulation, each heat recovery pipe is formed by splicing two splicing parts, and each splicing part comprises a flow channel pipe and a flow channel pipe, the flow channel pipe is in a hollow pipe body shape, the two sides of the hollow pipe body are used for being communicated with the pipe connector and the other adjacent flow channel pipe respectively, and turbulent flow grooves which are evenly distributed in the flow channel pipe and extend in the axis direction of the flow channel pipe are formed in the flow channel pipe. The heat recovery pipe is used for carrying out heat recovery operation in a fresh air system, the heat exchange efficiency of the heat recovery pipe can be improved, and the heat exchange effect of the heat recovery pipe can be improved as much as possible under the small size.

Description

Technical Field

[0001] The utility model relates to a heat recovery coil structure for a clean room, belonging to the technical field of heat recovery of the fresh air system in the clean room. Background Art

[0002] In addition to supplying fresh air to the clean room, the fresh air system of the clean room also needs to heat or cool the indoor environment. Since the fresh air system operates continuously, during actual operation, the exhaust outlet will discharge the hot or cold air in the room at the same time. Therefore, it is necessary to use a heat recovery pipe to recover the temperature of the heat source to avoid energy dissipation caused by direct discharge into the external environment.

[0003] For example, a heat recovery system disclosed in Patent No. CN219775915U uses the temperature of the discharged gas to exchange heat with the pipeline medium. After the liquid is re-introduced to the air supply outlet position, heat exchange can be carried out at the air supply position, thereby reducing the energy consumption required for refrigeration or heating.

[0004] Currently, the heat recovery pipes on the market are mainly composed of metal pipes and fins distributed on the metal pipes. The fins are used to increase the contact surface with the air, so as to efficiently transfer heat to the liquid medium inside the metal pipe to achieve heat exchange. That is, the heat exchange efficiency is actually affected by the arrangement density and thickness of the fins. With the iteration of technology, the fin density on the surface of the heat recovery pipe is already very close, and it is difficult to further improve. Therefore, the heat recovery efficiency of this fresh air system is limited. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a heat recovery coil structure for a clean room, which is used for heat recovery operations in the fresh air system, is beneficial to improving the heat exchange efficiency of the heat recovery pipe, and is beneficial to improving the heat exchange effect of the heat recovery pipe as much as possible under a smaller volume.

[0006] To achieve the above purpose, the utility model is implemented by the following technical solutions:

[0007] The heat recovery coil mechanism for a clean room provided by the utility model includes an air duct and a heat recovery coil arranged in the air duct. The heat recovery coil is composed of a plurality of heat recovery pipes and pipe joints used to connect the plurality of heat recovery pipes to realize liquid circulation. The heat recovery pipe is composed of two splicing parts spliced together. The splicing part includes:

[0008] A flow channel pipe, the flow channel pipe is in the shape of a hollow pipe body, and both sides of the hollow pipe body are used to connect the pipe joint and another adjacent flow channel pipe respectively. The inside of the flow channel pipe is provided with turbulence grooves evenly distributed inside the flow channel pipe and extending along the axial direction of the flow channel pipe;

[0009] Fins are evenly arranged on the outer surface of the flow channel pipe;

[0010] The pipe joint includes a bent pipe connecting pipe and a flower-opening external thread sleeve arranged at the end of the bent pipe connecting pipe. The end of the flow channel pipe is inserted into the inside of the flower-opening external thread sleeve. The inner diameter inside the opening external thread sleeve gradually increases towards the liquid inlet and outlet directions. The minimum inner diameter of the flower-opening external thread sleeve is smaller than the diameter of the held part of the flow channel pipe. A locking nut for locking the position of the flow channel pipe is threadedly connected to the flower-opening external thread sleeve.

[0011] Specifically, the flow disturbance groove is a spiral wire groove, and the spiral wire groove extends along the axial direction of the flow channel pipe to the opening position on one side of the flow channel pipe. The flow disturbance groove is a spiral wire groove, and the spiral wire groove extends along the axial direction of the flow channel pipe to the opening position on one side of the flow channel pipe.

[0012] Specifically, the splicing part further includes a joint flange arranged at the opening position of the flow channel pipe. An external connecting part is arranged on the side of the flow channel pipe away from the joint flange. The external connecting part is used for communicating and connecting with the pipe joint. The splicing part further includes a joint flange arranged at the opening position of the flow channel pipe. An external connecting part is arranged on the side of the flow channel pipe away from the joint flange. The external connecting part is used for communicating and connecting with the pipe joint.

[0013] Specifically, internal threads are also provided inside the liquid inlet and outlet of the pipe joint. External threads capable of matching the internal threads of the pipe joint are provided on the external connecting part at the end of the flow channel pipe. Internal threads are also provided inside the liquid inlet and outlet of the pipe joint. External threads capable of matching the internal threads of the pipe joint are provided on the external connecting part at the end of the flow channel pipe.

[0014] Specifically, multiple heat recovery pipes are evenly arranged on the air outlet section of the air duct and extend in an array along the air outlet direction.

[0015] Specifically, a plurality of flow disturbance plates are installed inside the air duct, and the flow disturbance plates are used to increase the flow path of the air flow.

[0016] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0017] By arranging corresponding flow disturbance grooves inside the heat recovery coil pipe of the present utility model and through the design of the inner wall notch, not only the heat exchange area with the pipe body is increased, but also the uniform movement of the fluid medium in the pipeline can be avoided from affecting the heat exchange absorption effect. That is, through the design of this extended notch, the heat exchange area can be increased while changing the flow characteristics of the heat exchange medium, which is beneficial to realizing the efficient heat exchange of the medium and breaking through the bottleneck of only setting fins on the outer surface of the pipeline for heat exchange. Description of the Drawings

[0018] Figure 1It is a schematic structural diagram of the heat recovery pipe provided by an embodiment of the present utility model;

[0019] Figure 2 It is a schematic overall structure diagram of the heat recovery coil mechanism provided by an embodiment of the present utility model;

[0020] Figure 3 It is a side view of the heat recovery coil mechanism provided by an embodiment of the present utility model;

[0021] Figure 4 It is the present utility model Figure 3 A-A direction sectional view of the heat recovery coil mechanism provided by an embodiment;

[0022] Figure 5 It is the present utility model Figure 4 Enlarged view of the structure at position B of the heat recovery coil mechanism provided by an embodiment;

[0023] Figure 6 It is the present utility model Figure 4 Enlarged view of the structure at position C of the heat recovery coil mechanism provided by an embodiment;

[0024] Figure 7 It is a front view of the heat recovery coil mechanism provided by an embodiment of the present utility model;

[0025] Figure 8 It is the present utility model Figure 7 D-D direction sectional view of the heat recovery coil structure provided by an embodiment;

[0026] Reference numerals: 1, heat recovery pipe; 101, flow channel pipe; 102, fin; 103, joint flange; 104, turbulence groove; 105, external connector; 2, air duct; 3, pipe joint; 301, elbow connecting pipe; 302, flower opening external thread sleeve; 4, mounting plate; 5, air pump; 6, turbulence plate. Detailed implementation manners

[0027] The present utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0030] A heat recovery coil structure for a clean room provided by an embodiment of the present utility model is used for heat recovery operations in a fresh air system, which is beneficial to improving the heat exchange efficiency of the heat recovery pipe and is beneficial to improving the heat exchange effect of the heat recovery pipe as much as possible in a smaller volume. In order to realize the function of the mechanism, the mechanism is provided here including an air duct 2 and a heat recovery coil arranged in the air duct 2. The air duct 2 is used to realize the circulation of indoor and outdoor air, and can be used for exhaust or intake. The heat recovery coil is used to absorb heat and exchange heat with the liquid medium inside the coil. It is designed that the heat recovery coil is composed of a plurality of heat recovery pipes 1 and pipe joints 3 for connecting a plurality of heat recovery pipes 1 to realize the liquid circulation. The structure of the heat recovery pipe 1 can be optimized through partial disassembly, avoiding the problem that the heat recovery coil is composed of a single pipeline and thus cannot well improve the efficiency problem, such as Figure 1 and Figure 5 As shown, it is designed that the heat recovery pipe 1 is spliced by two splicing parts, and the splicing parts are specifically designed to include:

[0031] A flow channel pipe 101 is used to guide the liquid medium and realize heat exchange with the liquid medium. The flow channel pipe 101 is arranged in a hollow pipe shape, and both sides of the hollow pipe are respectively used to connect to the pipe joint 3 and another adjacent flow channel pipe 101, such as Figures 4 - 6As shown, in order to improve the heat exchange effect of a single flow channel pipe 101, in addition to arranging evenly distributed fins 102 outside the flow channel pipe 101, specifically, a flow disturbance groove 104 is also provided inside the flow channel pipe 101, which is evenly distributed inside the flow channel pipe 101 and extends along the axial direction of the flow channel pipe 101. As Figure 6 shown, the flow disturbance groove 104 is used to improve the environment of the smooth pipeline inside the original flow channel pipe 101, which can effectively increase the contact area between the liquid and the pipe wall. That is to say, its actual function is equivalent to "inner small fins". The external fins 102 are used to increase the heat exchange area with air, and the "inner small fins" are used to increase the heat exchange area with the liquid medium, so as to improve the actual heat exchange efficiency through the improvement of the internal structure design. In addition, the design of the flow disturbance groove 104 can change the stable liquid flow in the original pipeline into turbulent flow. That is, after the fluid medium passes through the inside of the flow channel pipe 101, the irregular corrugations inside will make the liquid originally at the inner wall surface position flow towards the middle part of the pipeline or generate a tendency to move towards the middle. And the liquid in the middle is affected by the turbulent flow and has a tendency to move towards the wall surface position, which helps the liquid to collide and exchange heat with the inner wall surface efficiently, thereby further improving the heat exchange effect. Since the flow disturbance groove 104 is arranged inside the flow channel pipe 101, if the die forming method is considered, it is preferably possible to set the cross-section of the flow disturbance groove 104 to be triangular or isosceles trapezoidal for casting. However, for the convenience of external processing of the flow disturbance groove 104, it is also preferably possible to set the flow disturbance groove 104 as a spiral wire groove, and the spiral wire groove extends along the axial direction of the flow channel pipe 101 to the opening position on one side of the flow channel pipe 101. That is to say, actually, the groove body can be processed by extending from the opening position, such as the existing thread groove, etc. Specifically, other groove mouth shapes and implementation methods here are not limited. As Figure 2 The mounting plate 4 is used to mount the air pump 5, which is used to provide kinetic energy for the gas in the air duct 2.

[0032] For a heat recovery coil structure for a clean room provided by an embodiment of the present invention, when the flow disturbance groove 104 is a spiral wire groove, in order to realize the sealed connection of the opening, it can be set that the splicing part further includes a joint flange 103 installed at the opening position of the flow channel pipe 101, which is used to realize mutual splicing and sealing. In order to realize the connected connection of multiple flow channel pipes 101, an external connecting piece 105 also needs to be provided on the side of the flow channel pipe 101 away from the joint flange 103, and the external connecting piece 105 is set to be connected to the pipe joint 3 for connection.

[0033] A heat recovery coil structure for a clean room provided by an embodiment of the present utility model specifically provides a connection method between a flow channel pipe 101 and a pipe joint 3. Specifically, the pipe joint 3 is provided here to include an elbow connecting pipe 301 and a flower-opening external thread sleeve 302 provided at the end of the elbow connecting pipe 301. The flower-opening external thread sleeve 302 here is realized by opening a plurality of notches on a common external thread sleeve. These notches are used to form the external thread sleeve into a plurality of metal sheets with elastic deformation. Specifically, the end of the flow channel pipe 101 is inserted into the interior of the flower-opening external thread sleeve 302. The inner diameter inside the flower-opening external thread sleeve 302 gradually increases towards the liquid inlet and outlet directions, and the minimum inner diameter of the flower-opening external thread sleeve 302 is smaller than the diameter of the held portion of the flow channel pipe 101. That is, when the end of the flow channel pipe 101 is inserted into the interior of the flower-opening external thread sleeve 302, these metal sheets with a certain elastic deformation will open outwards by a certain amplitude. Usually, only a very small deformation range needs to be controlled. At this time, a locking nut (not shown in the figure) for locking the position of the flow channel pipe 101 is threadedly connected to the flower-opening external thread sleeve 302. The clamping degree of the end of the flow channel pipe 101 can be adjusted by adjusting the position of the locking nut, thereby ensuring the stable connection of the flow channel pipe 101. As a further preferred embodiment, internal threads can also be provided inside the liquid inlet and outlet of the pipe joint 3. As Figure 1 and Figure 5 shown, external threads that can match the internal threads of the pipe joint 3 are provided on the external connecting member 105 at the end of the flow channel pipe 101, so as to perform threaded cooperation to ensure the connection effect.

[0034] A heat recovery coil structure for a clean room provided by an embodiment of the present utility model. In order to further improve the heat exchange efficiency, a plurality of heat recovery pipes 1 can be evenly arranged on the air outlet section of the air duct 2, and these heat recovery pipes 1 are arranged to extend in an array along the air outlet direction. As Figure 8 shown, through this design, it is possible to avoid excessive heat dissipation due to insufficient heat exchange at the front end, so as to fully realize the heat exchange function. At this time, the liquid outlet pipe of the liquid should be connected to the heat recovery pipe 1 located at the air inlet position of the air path. When the liquid medium flows, the liquid at the back can be transported to the air inlet position, so that the output liquid has an ideal heat exchange temperature.

[0035] A heat recovery coil structure for a clean room provided by an embodiment of the present utility model. In order to increase the heat exchange time of the gas, a plurality of flow disturbance plates 6 can be installed inside the air duct 2. The layout of the flow disturbance plates 6 can be referred to as Figure 8 shown. These flow disturbance plates 6 are used to increase the flow path of the air path. They can be arranged between different heat recovery pipes 1 in an interval and diverging manner, so that the air path can pass through a plurality of heat recovery pipes 1 for heat exchange, thereby improving the heat exchange effect of the air path.

[0036] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A heat recovery coil structure for a clean room, characterized in that: The invention comprises an air duct (2) and a heat recovery coil arranged in the air duct (2), wherein the heat recovery coil is composed of a plurality of heat recovery pipes (1) and a pipe joint (3) for connecting the plurality of heat recovery pipes (1) to realize liquid circulation, and the heat recovery pipe (1) is composed of two splicing parts, and the splicing part comprises: A flow channel tube (101), the flow channel tube (101) being in the shape of a hollow tube body and having two sides of the hollow tube body respectively used to connect the pipe joint (3) and another adjacent flow channel tube (101), the flow channel tube (101) being provided with flow disturbance grooves (104) evenly distributed inside the flow channel tube (101) and extending along the axial direction of the flow channel tube (101); Fins (102) are evenly arranged on the outer surface of the flow channel tube (101); The pipe joint (3) comprises an elbow connecting pipe (301) and a flower-opening externally threaded sleeve (302) arranged at the end of the elbow connecting pipe (301); the end of the flow channel pipe (101) is inserted into the interior of the flower-opening externally threaded sleeve (302); the inner diameter of the flower-opening externally threaded sleeve (302) increases gradually toward the inlet and outlet direction of the liquid; the minimum inner diameter of the flower-opening externally threaded sleeve (302) is smaller than the diameter of the held portion of the flow channel pipe (101); and a locking nut for locking the position of the flow channel pipe (101) is threadedly connected to the flower-opening externally threaded sleeve (302).

2. A heat recovery coil structure for a clean room according to claim 1, characterized in that: The flow-disturbing groove (104) is a spiral groove, and the spiral groove extends along the axial direction of the flow channel tube (101) to an opening position on one side of the flow channel tube (101).

3. A heat recovery coil structure for a clean room according to claim 2, characterized in that: The splicing portion further comprises a joint flange (103) arranged at the opening position of the flow channel pipe (101), and an external connecting piece (105) is provided on a side of the flow channel pipe (101) away from the joint flange (103), and the external connecting piece (105) is used to communicate with the pipe joint (3).

4. A heat recovery coil structure for a clean room according to claim 3, characterized in that: The interior of the liquid inlet and outlet of the pipe joint (3) is also provided with an internal thread, and the external connecting piece (105) at the end of the flow channel pipe (101) is provided with an external thread that can match the internal thread of the pipe joint (3).

5. A heat recovery coil structure for a clean room according to any one of claims 1 to 4, characterized in that: The plurality of heat recovery pipes (1) are evenly arranged on the air outlet cross section of the air duct (2) and extend in an array along the air outlet direction.

6. A heat recovery coil structure for a clean room according to claim 5, characterized in that: A plurality of spoilers (6) are installed inside the air duct (2), and the spoilers (6) are used to increase the flow path of the air duct.

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