Heat exchange unit structure
By adopting a combined heat exchange method of main heat exchanger and plate heat exchanger in the heat exchanger structure, combined with the circulating conveying of the circulating pump, the problem of low heat energy utilization in the existing technology is solved, and more efficient heat energy is achieved Utilize and lower energy consumption.
Patent Information
- Application Number
- CN202421001267.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The flame and flue gas movement distance after combustion of the existing heat exchange unit structure is too short, the heat energy utilization rate is low, and the energy consumption is large.
The main heat exchanger is used to circulate the heat generated by the burner in one cycle, and the heat is circulated again through the plate heat exchanger. Combined with the circulation conveying of the circulation pump and the main heat exchanger, the closed hot water circulation heating is realized. Combined cooling heat exchange method.
It improves heat exchange efficiency, is suitable for heating and heating scenarios, effectively utilizes heat energy, and reduces energy consumption.
Smart Images
Figure CN222480613U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat exchange, and in particular relates to a heat exchange unit structure. Background Art
[0002] The structure of the industrial heat exchanger unit is a large-scale hot water supply device that uses industrial fuel for heating. At present, the hot water unit chassis is divided into two parts: the distribution box and the pipeline box. The distribution box is mainly used for controlling the hot water heating temperature, and the pipeline box is mainly used for the installation of pipelines and the coordination with the circuit components in the distribution box.
[0003] However, the flame and flue gas movement distance after combustion in the existing heat exchange unit structure is too short, and the residence time in the furnace is too short, so the converted heat energy cannot be fully absorbed and utilized. The flue gas temperature discharged from the chimney is as high as 350°C, and its thermal energy utilization rate is low, and the energy consumption is large. Utility Model Content
[0004] The purpose of the utility model is to provide a heat exchange unit structure to improve the heat exchange efficiency in view of the deficiencies in the prior art.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A heat exchange unit structure comprises an outer box, a heating furnace, a plate heat exchanger and a circulation pump; the heating furnace comprises a burner and a main heat exchanger; an installation cavity is provided in the outer box; the burner is connected to the inside of the installation cavity and is arranged above the main heat exchanger; the main heat exchanger is connected to the inside of the installation cavity and is communicated with the exhaust end of the burner; the circulation pump is arranged between the plate heat exchanger and the main heat exchanger and is communicated with the input end of the main heat exchanger; the plate heat exchanger is connected to the inside of the installation cavity and is communicated with the input end of the circulation pump.
[0007] Preferably: the main heat exchanger includes a heat dissipation straight pipe, an air duct and a shell; the shell is connected to the inside of the installation inner cavity; and a placement inner cavity is provided in the shell; the air duct is connected to the top of the shell and is communicated with the placement inner cavity; and the air duct is communicated with the burner; the heat dissipation straight pipe is arranged inside the placement inner cavity; and the placement inner cavity is also communicated with the circulation pump.
[0008] Preferably: the heating furnace also includes a first water supply pipe and a first water return pipe; the input end of the first water supply pipe is connected to the output end of the main heat exchanger; the output end of the first water supply pipe is connected to the plate heat exchanger; one end of the first water return pipe is connected to the output end of the circulation pump; the other end of the first water return pipe is connected to the input end of the main heat exchanger; and / or the other end of the first water return pipe is connected to an expansion tank.
[0009] Preferably: the heating furnace further comprises a smoke exhaust pipe, the input end of the smoke exhaust pipe is connected to the smoke exhaust end of the main heat exchanger; the output end of the smoke exhaust pipe passes through the side end of the outer box body and is connected to the outer box body.
[0010] Preferably: the plate heat exchanger includes at least one cooling fin; the cooling fins are stacked side by side; and the plate heat exchanger is provided with a second water supply pipe, a second water return pipe, a first input pipe and a first delivery pipe; the second water supply pipe and the second water return pipe are respectively fixed to the outer box body and are connected to the cooling fins; the first input pipe and the first delivery pipe are respectively connected to the cooling fins; and the input end of the first input pipe is connected to the output end of the circulation pump; the first delivery pipe is connected to the input end of the circulation pump.
[0011] Preferably: the burner includes a gas delivery pipe and a combustion mechanism; the gas delivery pipe is connected to the inside of the installation cavity; and one end of the gas delivery pipe passes through the side end of the outer box body; the other end of the gas delivery pipe is connected to the combustion mechanism; and the output end of the combustion mechanism is connected to the main heat exchanger.
[0012] Preferably: the combustion mechanism includes a planar combustion component, a gas proportional valve, a DC fan and a mixer; the input end of the gas proportional valve is connected to the gas delivery pipe; the output end of the gas proportional valve is connected to the first inlet of the mixer; the output end of the DC fan is connected to the second inlet of the mixer; the output port of the mixer is connected to the inlet of the planar combustion component; the outlet of the planar combustion component is connected to the main heat exchanger.
[0013] Preferably: a flow guiding cavity is provided in the mixer; the first inlet, the second inlet and the outlet are respectively connected to the flow guiding cavity; and the diameter of the flow guiding cavity from the second inlet toward the outlet and / or from the first inlet toward the outlet first gradually decreases and then gradually increases.
[0014] The beneficial effect of the utility model lies in that the technical solution adopts a main heat exchanger to perform a circulation heat exchange on the heat generated by the burner and a plate heat exchanger to perform a second circulation heat exchange on the heat generated by the burner, and through the circulation transportation of the circulation pump and the main heat exchanger, a closed hot water circulation heating and cooling combined heat exchange method is realized, and the heat exchange efficiency can be improved, which is suitable for heating scenarios in real life. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The following will refer to the attached Figures 1 to 6 To describe the features, advantages and technical effects of exemplary embodiments of the present utility model.
[0016] Figure 1 This is a schematic diagram of the overall structure of a heat exchange unit structure according to an embodiment of the utility model;
[0017] Figure 2 This is a schematic diagram of the overall structure of a heat exchange unit structure according to an embodiment of the utility model;
[0018] Figure 3 This is a schematic diagram of the overall structure of a heat exchange unit structure according to an embodiment of the utility model;
[0019] Figure 4 A schematic structural diagram of a burner of a heat exchange unit structure according to an embodiment of the utility model;
[0020] Figure 5 A schematic structural diagram of a plate heat exchanger of a heat exchange unit structure according to an embodiment of the utility model;
[0021] Figure 6 This is a structural schematic diagram of a main heat exchanger of a heat exchange unit structure according to an embodiment of the utility model.
[0022] In the figure: 1-outer box; 2-burner; 21-gas delivery pipe; 22-combustion mechanism; 221-gas proportional valve; 222-DC fan; 223-mixer; 2231-flow guide cavity; 3-main heat exchanger; 301-first water supply pipe; 302-first return water pipe; 31-heat dissipation straight pipe; 32-air guide pipe; 33-shell; 4-plate heat exchanger; 41-second water supply pipe; 42-second return water pipe; 43-first input pipe; 44-first delivery pipe; 401-heat dissipation fins; 5-circulation pump; 6-smoke exhaust pipe. DETAILED DESCRIPTION
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0024] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.
[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0026] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects in the heat exchanger structure description, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and multiple situations exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship of the heat exchanger structure.
[0027] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).
[0028] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.
[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0030] The following is combined with Figure 1 to Figure 6 The utility model is further described in detail, but it is not intended to limit the utility model.
[0031] like Figure 1 and 2As shown, in one embodiment of the utility model, the heat exchange unit structure comprises an outer box body 1, a heating furnace, a plate heat exchanger 4 and a circulating pump 5; the heating furnace comprises a burner 2 and a main heat exchanger 3; an installation cavity is provided in the outer box body 1; the burner 2 is connected to the inside of the installation cavity and is arranged above the main heat exchanger 3; the main heat exchanger 3 is connected to the inside of the installation cavity and is connected to the exhaust end of the burner 2; the circulating pump 5 is arranged between the plate heat exchanger 4 and the main heat exchanger 3 and is connected to the input end of the main heat exchanger 3; the plate heat exchanger 4 is connected to the inside of the installation cavity and is connected to the input end of the circulating pump 5.
[0032] The technical solution of the utility model adopts a main heat exchanger to perform a circulation heat exchange on the heat generated by the burner and a plate heat exchanger to perform a second circulation heat exchange on the heat generated by the burner, and through the circulation transportation of the circulation pump and the main heat exchanger, a closed hot water circulation heating and cooling combined heat exchange method is realized, and the heat exchange efficiency can be improved, which is suitable for heating scenarios in real life.
[0033] Wherein, in some embodiments, Figures 1 to 3 As shown, the burner 2 is arranged at the top of the inner cavity; at least three main heat exchangers 3 are selected and arranged in parallel; and the main heat exchanger 3 is arranged below the burner 2; the circulation pump 5 is arranged below the main heat exchanger 3; and the plate heat exchanger 4 is arranged on the side of the circulation pump 5. In other words, the orderliness of the circulation flow can be effectively improved by circulating from top to bottom, and the transportation efficiency can be improved, avoiding the addition of excessive transportation power.
[0034] Specifically, in some embodiments, Figure 2 and 3 As shown, the heating furnace is provided with a smoke exhaust pipe 6, the input end of the smoke exhaust pipe 6 is connected to the smoke exhaust end of the main heat exchanger 3; the output end of the smoke exhaust pipe 6 passes through the side end of the outer box 1 and is connected to the outer box 1. This structure can effectively and quickly discharge the flue gas that has been burned and heat exchanged through the smoke exhaust pipe 6, thereby ensuring the orderly operation of the cycle and improving the efficiency of the heat exchange operation. Among them, the smoke exhaust pipe 6 is composed of a plurality of honeycomb flow sections, which flush the outer wall of the tube and the surface of the fins from top to bottom in turn, and finally reduce the smoke temperature to below 65°C to reach a condensation state; its thermal efficiency is as high as 108%.
[0035] Specifically, in some embodiments, Figure 1 and 3As shown, the burner 2 includes a gas delivery pipe 21 and a combustion mechanism 22; the gas delivery pipe 21 is connected to the inside of the installation cavity; and one end of the gas delivery pipe 21 passes through the side end of the outer box 1; the other end of the gas delivery pipe 21 is connected to the combustion mechanism 22; and the output end of the combustion mechanism 22 is connected to the main heat exchanger 3. Figure 4 As shown, the combustion mechanism 22 includes a planar combustion component, a gas proportional valve 221, a DC fan 222 and a mixer 223; the input end of the gas proportional valve 221 is connected to the gas delivery pipe 21; the output end of the gas proportional valve 221 is connected to the first inlet of the mixer 223; the output end of the DC fan 222 is connected to the second inlet of the mixer 223; the output port of the mixer is connected to the inlet of the planar combustion component; the outlet of the planar combustion component is connected to the main heat exchanger. That is to say, firstly, the gas is distributed to the inlet of the gas proportional valve 221 of each unit module through the gas delivery pipe. Among them, the main function of the gas proportional valve 221 is to automatically adjust the gas flow rate according to the combustion load. After passing through the gas proportioning valve 221, the gas enters the mixer 223 and is premixed with the air in a certain proportion. The mixed air is introduced by the DC fan 222. The second inlet of the mixer 223 is the air inlet, the first inlet is the gas inlet, and the outlet is connected to the DC fan 222. After being pressurized by the DC fan 222, the gas enters the planar combustion component (planar burner) through the outlet and is evenly ejected from the planar fire holes of the combustion part. The gas is ignited and burned under the action of the electric spark generated by the high-voltage discharge of the ignition needle. This allows the flue gas with heat to be discharged quickly, thereby increasing the circulation discharge speed and facilitating the improvement of the heat exchange speed and efficiency. Further, as Figure 4 As shown, the mixer 223 is provided with a guide cavity 2231; the first inlet, the second inlet and the outlet are respectively connected to the guide cavity 2231; and the diameter of the guide cavity 2231 from the second inlet toward the outlet and / or from the first inlet toward the outlet first gradually decreases and then gradually increases. This structure can increase the speed of smoke delivery by gradually decreasing it first, and then effectively increase the amount of smoke delivered by gradually increasing it, thereby improving the smoke delivery efficiency. Further, as Figure 5As shown, the gas proportion valve 221 includes a combustion-supporting gas pipeline, a mixing tube, a gas pipeline, a burner head and a mixing fan; the mixing tube is provided with a first through hole, a second through hole and a third through hole; the combustion-supporting gas pipeline and the gas pipeline are respectively connected to the first through hole and the second through hole, and the combustion-supporting gas pipeline is used to transport the combustion-supporting gas, and the gas pipeline is used to transport the gas; the mixing fan is connected to the third through hole; the burner head is connected to the outlet of the mixing fan. Further, the combustion-supporting gas includes air; hydrogen, and the gas includes carbon monoxide, hydrocarbons, borane, silane, etc. Further, the burner head uses a metal fiber burner head. The head of the metal fiber burner head can be made into a flat shape, a cylindrical shape, a conical shape, a concave shape, a spherical shape, etc. This structure improves the completeness of combustion and improves combustion efficiency.
[0036] Specifically, in some embodiments, Figure 3 and 6 As shown, the main heat exchanger 3 includes a heat dissipation straight pipe 31, an air duct 32 and a shell 33; the shell 33 is connected to the inside of the installation cavity; and a placement cavity is provided in the shell 33; the air duct 32 is connected to the top of the shell 33 and is communicated with the placement cavity; and the air duct 32 is communicated with the burner 2; the heat dissipation straight pipe 31 is arranged inside the placement cavity; and the placement cavity is also communicated with the circulation pump 5. Among them, the shell 33 is made of SUS316L stainless steel material; the air duct 32 is SUS444 stainless steel fins; through the heat exchange effect of the main heat exchanger 3, the outlet water temperature can reach up to 90°C after the air duct 32 absorbs the flue gas heat. Among them, as Figure 3 As shown, the heating furnace further includes a first water supply pipe 301 and a first water return pipe 302; the input end of the first water supply pipe 301 is connected to the output end of the main heat exchanger 3; the output end of the first water supply pipe 301 is connected to the plate heat exchanger 4; one end of the first water return pipe 302 is connected to the output end of the circulation pump 5; the other end of the first water return pipe 302 is connected to the input end of the main heat exchanger 3; and / or, the other end of the first water return pipe 302 is connected to an expansion tank 7. This structure compensates the system expansion amount after the liquid of the primary main heat exchanger is heated and expanded through the expansion tank 7, thereby improving the safety of use.
[0037] Specifically, in some embodiments, Figure 2 and 3As shown in Figure 6, the plate heat exchanger 4 includes at least one cooling fin 401; the cooling fins 401 are stacked side by side; and the plate heat exchanger 4 is provided with a second water supply pipe 41, a second water return pipe 42, a first input pipe 43 and a first delivery pipe 44; the second water supply pipe 41 and the second water return pipe 42 are respectively fixed on the outer box body 1 and are connected to the cooling fin 401; the first input pipe 43 and the first delivery pipe 44 are respectively connected to the cooling fin 401; and the input end of the first input pipe 43 is connected to the output end of the circulation pump 5; the first delivery pipe 44 is connected to the input end of the circulation pump 5.
[0038] That is to say, the high-temperature flue gas after combustion flushes the heat exchange tubes and fins in the main heat exchanger 3 from top to bottom in sequence, the heat exchange tube wall fully absorbs the flue gas heat to cool the flue gas, and the medium water inside the heat exchange tube takes away the heat of the tube wall to cool the tube wall. In this cycle, the heat of the high-temperature flue gas generated after combustion is transferred to the medium water in the tube, so that the water is heated and heated, and then flows into the first water supply pipe 301 through the water outlet of the main heat exchanger 3, and is connected to the plate heat exchanger 4 through the main pipe. After being cooled by the plate heat exchanger 4, it is pumped back by the circulation pump 5 through the first return water pipe 302 and sent to the main heat exchanger 3 for further heating. In this cycle, a closed hot water circulation heating and cooling system is formed.
[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
[0040] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.
Claims
1. A heat exchange unit structure, characterized in that: It includes an outer box, a heating furnace, a plate heat exchanger and a circulation pump; the heating furnace includes a burner and a main heat exchanger; an installation cavity is provided in the outer box; the burner is connected to the inside of the installation cavity and is arranged above the main heat exchanger; the main heat exchanger is connected to the inside of the installation cavity and is communicated with the exhaust end of the burner; the circulation pump is arranged between the plate heat exchanger and the main heat exchanger and is communicated with the input end of the main heat exchanger; the plate heat exchanger is connected to the inside of the installation cavity and is communicated with the input end of the circulation pump.
2. The heat exchange unit structure according to claim 1, characterized in that: The main heat exchanger includes a heat dissipation straight pipe, an air duct and a shell; the shell is connected to the interior of the installation cavity; and a placement cavity is provided in the shell; the air duct is connected to the top of the shell and is communicated with the placement cavity; and the air duct is communicated with the burner; the heat dissipation straight pipe is arranged inside the placement cavity; and the placement cavity is also communicated with the circulation pump.
3. The heat exchange unit structure according to claim 1 or 2, characterized in that: The heating furnace also includes a first water supply pipe and a first water return pipe; the input end of the first water supply pipe is connected to the output end of the main heat exchanger; the output end of the first water supply pipe is connected to the plate heat exchanger; one end of the first water return pipe is connected to the output end of the circulation pump; the other end of the first water return pipe is connected to the input end of the main heat exchanger; and / or the other end of the first water return pipe is connected to an expansion tank.
4. The heat exchange unit structure according to claim 1, characterized in that: The heating furnace further comprises a smoke exhaust pipe, the input end of which is in communication with the smoke exhaust end of the main heat exchanger; the output end of which passes through the side end of the outer box body and is connected to the outer box body.
5. The heat exchange unit structure according to claim 1, characterized in that: The plate heat exchanger includes at least one cooling fin; the cooling fins are stacked side by side; and the plate heat exchanger is provided with a second water supply pipe, a second water return pipe, a first input pipe and a first delivery pipe; the second water supply pipe and the second water return pipe are respectively fixed to the outer box body and are connected to the cooling fins; the first input pipe and the first delivery pipe are respectively connected to the cooling fins; and the input end of the first input pipe is connected to the output end of the circulation pump; the first delivery pipe is connected to the input end of the circulation pump.
6. The heat exchange unit structure according to claim 1, characterized in that: The burner includes a gas delivery pipe and a combustion mechanism; the gas delivery pipe is connected to the inside of the installation cavity; and one end of the gas delivery pipe passes through the side end of the outer box body; the other end of the gas delivery pipe is connected to the combustion mechanism; and the output end of the combustion mechanism is connected to the main heat exchanger.
7. The heat exchange unit structure according to claim 6, characterized in that: The combustion mechanism includes a planar combustion component, a gas proportional valve, a DC fan and a mixer; the input end of the gas proportional valve is connected to the gas delivery pipe; the output end of the gas proportional valve is connected to the first inlet of the mixer; the output end of the DC fan is connected to the second inlet of the mixer; the output port of the mixer is connected to the inlet of the planar combustion component; and the outlet of the planar combustion component is connected to the main heat exchanger.
8. The heat exchange unit structure according to claim 7, characterized in that: A flow guiding cavity is provided in the mixer; the first inlet, the second inlet and the outlet are respectively connected to the flow guiding cavity; and the diameter of the flow guiding cavity from the second inlet toward the outlet and / or from the first inlet toward the outlet first gradually decreases and then gradually increases.