A structure of a convection / radiation integrated heat exchange terminal

Abstract

The present application relates to heat supply and air conditioning technical field, provide a structure of convection / radiation integrated heat exchange terminal, at least comprising: radiation heat dissipation module, including first radiation plate and second radiation plate which are arranged opposite to each other, and the gap between the two forms natural convection channel;The first radiation plate and the second radiation plate are both composed of a plurality of parallel arranged heat exchange microchannels;Gas header, the gas inlet of the heat exchange microchannel in the first radiation plate and the second radiation plate is all communicated with the gas header;Liquid header, the liquid outlet of the heat exchange microchannel in the first radiation plate and the second radiation plate is all communicated with the liquid header.The structure, the heat exchange microchannel in the first radiation plate and the second radiation plate is all communicated with the gas header and the liquid header, so that the heat exchange microchannel can directly contact and heat transfer with high temperature heat carrier R1 from the gas header, the heat transfer efficiency is higher, and it is favorable to improve the energy efficiency of the radiation heat dissipation module.

Description

Technical Field

[0001] This invention relates to the field of heating and air conditioning technology, specifically to the structure of an integrated convection / radiation heat exchange terminal. Background Technology

[0002] Currently, in HVAC systems, indoor heat dissipation equipment typically takes two forms: radiant terminals such as radiators and underfloor heating, and convective terminals such as fan coil units and air conditioners. Radiant terminals transfer heat from the heat transfer medium to the room through a combination of radiation and natural convection. Because there is no draft, the room is comfortable during continuous operation. However, due to its relatively small heat transfer area, its heat dissipation is low, making it suitable only for buildings with low heat loads and continuous heating. Since heating cannot be interrupted regardless of demand, this inevitably leads to significant ineffective heating and substantial energy waste. Convective terminals, on the other hand, use air at a certain velocity as a medium to transfer heat from the heat transfer medium (hot water or high-temperature refrigerant) to the room through a heat exchanger. Compared to radiant terminals, convective terminals use forced convection heat exchange, resulting in higher heating capacity and faster heating speed, making them particularly suitable for intermittent heating. However, because they create a noticeable draft during operation, and because hot air tends to rise, they cause a warmer upper part of the room and a cooler lower part, reducing human comfort. With the increasing awareness of energy conservation and carbon reduction among the public, people hope that convection terminals such as air conditioners and fan coil units can quickly generate heat after startup to ensure that the required room temperature can be reached rapidly when heating is needed. Furthermore, they hope that once the room temperature is reached, the convection terminals can function like radiant terminals, ensuring indoor heating needs while avoiding drafts to improve indoor comfort. Therefore, the development of integrated convection / radiant heating terminal equipment that combines the dual functions of rapid heating from convection terminals and comfortable heating from radiant terminals has become an urgent social need.

[0003] Existing convection / radiation air conditioning terminals include heat pipes; one end of the heat pipe is connected to a first heat exchange pipe, and the other end is connected to a second heat exchange pipe; the heat pipe includes multiple independently arranged first microchannels and multiple independently arranged second microchannels, and the first and second microchannels are independently arranged; a first heat exchange medium is disposed in the first microchannel, and a second heat exchange medium is disposed in the second microchannel. The two ends of the first microchannel are in contact with the first and second heat exchange pipes for heat transfer, respectively; the two ends of the second microchannel are also in contact with the first and second heat exchange pipes for heat transfer, respectively. However, when this convection / radiation air conditioning terminal provides heating (cooling), the heat transfer between the first (and second) microchannels and the first and second heat exchange pipes is through contact, resulting in low heat transfer efficiency and limited energy efficiency improvement. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that in the prior art, when the convection / radiation air conditioning terminal realizes heating (cooling), the first microchannel (second microchannel) and the first heat exchange pipe and the second heat exchange pipe are in contact for heat transfer, resulting in low heat transfer efficiency and limited energy efficiency improvement. Therefore, the present invention provides a structure for an integrated convection / radiation heat exchange terminal.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A structure for an integrated convection / radiation heat exchange terminal includes at least: a radiative heat dissipation module comprising a first radiating plate and a second radiating plate facing each other, with a gap between them forming a natural convection channel; both the first and second radiating plates are composed of a plurality of parallel heat exchange microchannels; a gas manifold is disposed upstream of the first and second radiating plates, with the air inlets of the heat exchange microchannels in the first and second radiating plates connected to the gas manifold; and a liquid manifold is disposed downstream of the first and second radiating plates, with the liquid outlets of the heat exchange microchannels in the first and second radiating plates connected to the liquid manifold.

[0007] Furthermore, the structure of this integrated convection / radiation heat exchange terminal also includes a convection heat exchange module and a heat source module. The convection heat exchange module includes a heat transfer medium R1 circulation loop, a heat transfer medium R2 circulation loop, and a first fan. The heat transfer medium R2 circulation loop is connected to the heat source module, and the heat source module provides the energy required for heat exchange to the heat transfer medium R2 circulation loop. The heat transfer medium R1 circulation loop and the heat transfer medium R2 circulation loop are in contact to allow heat exchange between them. The first fan is adapted to the heat transfer medium R1 circulation loop and the heat transfer medium R2 circulation loop so that external air R3 can exchange heat when flowing through the heat transfer medium R1 circulation loop and the heat transfer medium R2 circulation loop. The outlet of the heat transfer medium R1 circulation loop is connected to the inlet of the gas manifold, and the inlet of the heat transfer medium R1 circulation loop is connected to the outlet of the liquid manifold.

[0008] Further, the heat transfer medium R1 circulation loop includes a first vertical pipe for collecting heat transfer medium R1, a horizontal pipe for collecting heat transfer medium R1, and a second vertical pipe for collecting heat transfer medium R1 connected in sequence. The inlet of the first vertical pipe for collecting heat transfer medium R1 is connected to the outlet of the liquid manifold, and the outlet of the second vertical pipe for collecting heat transfer medium R1 is connected to the inlet of the gas manifold. The heat transfer medium R2 circulation loop includes a first vertical pipe for collecting heat transfer medium R2, a horizontal pipe for collecting heat transfer medium R2, and a second vertical pipe for collecting heat transfer medium R2 connected in sequence. The inlet of the first vertical pipe for collecting heat transfer medium R2 is connected to the outlet of the heat source module, and the outlet of the second vertical pipe for collecting heat transfer medium R2 is connected to the inlet of the heat source module. The horizontal pipe for collecting heat transfer medium R1 and the horizontal pipe for collecting heat transfer medium R2 are in contact with each other.

[0009] Furthermore, the horizontal tube of heat transfer medium R1 and the horizontal tube of heat transfer medium R2 are connected in contact via heat exchange fins.

[0010] Furthermore, the radiative heat dissipation module also includes an air inlet pipe and a liquid outlet pipe; the inlet of the air inlet pipe is connected to the outlet of the second vertical pipe for collecting the heat transfer medium R1, and the outlet of the air inlet pipe is connected to the inlet of the gas manifold; the inlet of the liquid outlet pipe is connected to the outlet of the liquid manifold, and the outlet of the liquid outlet pipe is connected to the inlet of the second vertical pipe for collecting the heat transfer medium R1.

[0011] Furthermore, the radiative heat dissipation module also includes folded fins disposed between the first radiating plate and the second radiating plate, and the folded fins are in contact with both the first radiating plate and the second radiating plate.

[0012] Furthermore, the gas manifold includes two gas manifolds, one of which is disposed corresponding to the first radiant plate and the other of which is disposed corresponding to the second radiant plate.

[0013] Furthermore, the liquid manifold comprises two, one of which is disposed corresponding to the first radiant plate, and the other of which is disposed corresponding to the second radiant plate.

[0014] Furthermore, the heat source module is a single-heat type heat pump, including a throttling device, an outdoor heat exchanger, and a compressor connected in sequence; the inlet of the throttling device is connected to the outlet of the second vertical pipe for collecting the heat transfer medium R2, and the outlet of the compressor is connected to the inlet of the first vertical pipe for collecting the heat transfer medium R2.

[0015] Furthermore, the heat source module is a cooling-heating type heat pump, including a throttling device, an outdoor heat exchanger, a compressor, and a four-way valve; the inlet of the throttling device is connected to the outlet of the second vertical pipe for collecting the heat transfer medium R2, the outlet of the throttling device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the first inlet of the four-way valve, the first outlet of the four-way valve is connected to the inlet of the compressor, the outlet of the compressor is connected to the second inlet of the four-way valve, and the second outlet of the four-way valve is connected to the inlet of the first vertical pipe for collecting the heat transfer medium R2.

[0016] Furthermore, the heat source module is in the form of a chiller / hot water unit, including a plate heat exchanger, a throttling device, an outdoor heat exchanger, and a compressor; the plate heat exchanger is filled with heat transfer medium R4, the first inlet of the plate heat exchanger is connected to the outlet of the second vertical pipe of the heat transfer medium R2, the first outlet of the plate heat exchanger is connected to the inlet of the first vertical pipe of the heat transfer medium R2; the second outlet of the plate heat exchanger is connected to the inlet of the throttling device, the outlet of the throttling device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the compressor, and the outlet of the compressor is connected to the second inlet of the plate heat exchanger.

[0017] Furthermore, the heat source module is in the form of an urban heating network, including a plate heat exchanger and an urban heating network; the plate heat exchanger is filled with heat transfer medium R4, and the urban heating network is provided with heat transfer medium R5; the first inlet of the plate heat exchanger is connected to the outlet of the second vertical pipe of the heat transfer medium R2, and the first outlet of the plate heat exchanger is connected to the inlet of the first vertical pipe of the heat transfer medium R2; the inlet of the urban heating network is connected to the second inlet of the plate heat exchanger, and the outlet of the urban heating network is connected to the second outlet of the plate heat exchanger.

[0018] The technical solution of this invention has the following advantages:

[0019] The structure of the integrated convection / radiation heat exchange terminal provided by the present invention has heat exchange microchannels in the first and second radiation plates that are connected to the gas manifold and the liquid manifold, so that the heat exchange microchannels can directly contact the high-temperature heat transfer medium R1 from the gas manifold for heat transfer, resulting in higher heat transfer efficiency and improving the energy efficiency of the radiative heat dissipation module. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an integrated convection / radiation heat exchange terminal in one embodiment of the present invention;

[0022] Figure 2 for Figure 1 Side view;

[0023] Figure 3 This is a schematic diagram of the structure of the integrated convection / radiation heat exchange terminal in another embodiment of the present invention;

[0024] Figure 4 for Figure 3 Top view;

[0025] Figure 5 This is a schematic diagram of the structure of the integrated convection / radiation heat exchange terminal in another embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the integrated convection / radiation heat exchange terminal in another embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the integrated convection / radiation heat exchange terminal in another embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of a convection / radiation integrated heat exchange terminal with a shut-off valve in one embodiment of the present invention.

[0029] Figure label:

[0030] 1. Radiative heat dissipation module; 2. Convection heat transfer module; 3. Heat source module;

[0031] 11. Gas manifold; 12. Heat exchange microchannel; 13. Liquid manifold; 14. Folded fins; 15. First radiant plate; 16. Second radiant plate; 17. Inlet pipe; 18. Outlet pipe; 19. Natural convection channel; 110. Shut-off valve;

[0032] 21. First fan; 22. First vertical pipe for collecting heat transfer medium R1; 23. Horizontal pipe for collecting heat transfer medium R1; 24. Second vertical pipe for collecting heat transfer medium R1; 25. Heat exchange fins; 26. First vertical pipe for collecting heat transfer medium R2; 27. Horizontal pipe for collecting heat transfer medium R2; 28. Second vertical pipe for collecting heat transfer medium R2;

[0033] 31. Compressor; 32. Outdoor heat exchanger; 33. Throttling device; 34. Secondary fan; 35. Four-way valve; 36. Plate heat exchanger; 37. Urban heating network;

[0034] 41. Unit supply air; 42. Unit return air. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Figure 1 This is a schematic diagram of the structure of an integrated convection / radiation heat exchange terminal in one embodiment of the present invention; Figure 2 for Figure 1 Side view; such as Figure 1 and Figure 2 As shown, this embodiment provides a structure for an integrated convection / radiation heat exchange terminal, comprising at least: a radiative heat dissipation module 1, including a first radiating plate 15 and a second radiating plate 16 facing each other, with the gap between them forming a natural convection channel 19; both the first radiating plate 15 and the second radiating plate 16 are composed of several parallel heat exchange microchannels 12; a gas manifold 11 is located upstream of the first radiating plate 15 and the second radiating plate 16, and the air inlets of the heat exchange microchannels 12 in the first radiating plate 15 and the second radiating plate 16 are connected to the gas manifold 11; a liquid manifold 13 is located downstream of the first radiating plate 15 and the second radiating plate 16, and the liquid outlets of the heat exchange microchannels 12 in the first radiating plate 15 and the second radiating plate 16 are connected to the liquid manifold 13; for example, all the heat exchange microchannels 12 can be arranged vertically, with the top of each heat exchange microchannel 12 inserted into the gas manifold 11 and the bottom of each heat exchange microchannel 12 inserted into the liquid manifold 13.

[0040] The structure of the integrated convection / radiation heat exchange terminal provided in this embodiment is such that the heat exchange microchannels 12 in the first radiation plate 15 and the second radiation plate 16 are all connected to the gas manifold 11 and the liquid manifold 13, so that the heat exchange microchannels 12 can directly contact the high-temperature heat transfer medium R1 from the gas manifold 11 for heat transfer, resulting in higher heat transfer efficiency and improving the energy efficiency of the radiative heat dissipation module 1.

[0041] The structure of the integrated convection / radiation heat exchange terminal also includes a convection heat exchange module 2 and a heat source module 3. The convection heat exchange module 2 includes a heat transfer medium R1 circulation loop, a heat transfer medium R2 circulation loop, and a first fan 21. The heat transfer medium R2 circulation loop is connected to the heat source module 3, which provides the energy required for heat exchange to the heat transfer medium R2 circulation loop. The first fan 21 is adapted to the heat transfer medium R1 circulation loop and the heat transfer medium R2 circulation loop so that when the external air R3 flows through the heat transfer medium R1 circulation loop and the heat transfer medium R2 circulation loop, it can interact with the heat transfer medium. R1 exchanges heat with heat transfer medium R2. For example, the first fan 21 can be set towards the circulation loop of heat transfer medium R1 and the circulation loop of heat transfer medium R2. The first fan 21 can transport outdoor air R3 to the indoor air after exchanging heat with the circulation loops of heat transfer medium R1 and R2. The circulation loops of heat transfer medium R1 and R2 are in contact to allow heat exchange between them. The outlet of the circulation loop of heat transfer medium R1 is connected to the inlet of the gas manifold 11, and the inlet of the circulation loop of heat transfer medium R1 is connected to the outlet of the liquid manifold 13.

[0042] The heat transfer medium R1 circulation loop includes a first vertical pipe 22 for collecting heat transfer medium R1, a horizontal pipe 23 for collecting heat transfer medium R1, and a second vertical pipe 24 for collecting heat transfer medium R1 connected in sequence. The inlet of the first vertical pipe 22 for collecting heat transfer medium R1 is connected to the outlet of the liquid manifold 13, and the outlet of the second vertical pipe 24 for collecting heat transfer medium R1 is connected to the inlet of the gas manifold 11. The heat transfer medium R2 circulation loop includes a first vertical pipe 26 for collecting heat transfer medium R2, a horizontal pipe 27 for collecting heat transfer medium R2, and a second vertical pipe 28 for collecting heat transfer medium R2 connected in sequence. The inlet of the first vertical pipe 26 for collecting heat transfer medium R2 is connected to the outlet of the heat source module 3, and the outlet of the second vertical pipe 28 for collecting heat transfer medium R2 is connected to the inlet of the heat source module 3. The horizontal pipe 23 for collecting heat transfer medium R1 and the horizontal pipe 27 for collecting heat transfer medium R2 are in contact with each other. It should be noted that the first vertical pipe 22 for collecting heat transfer medium R1, the second vertical pipe 24 for collecting heat transfer medium R1, the first vertical pipe 26 for collecting heat transfer medium R2, and the second vertical pipe 28 for collecting heat transfer medium R2 in this embodiment are not limited to being arranged only in the longitudinal direction. In some implementations, the above-mentioned pipes can also be arranged in the horizontal direction. In some special applications, the above-mentioned pipes can be bent or tilted. The specific arrangement can be designed according to actual needs, and no specific limitation is made here.

[0043] The radiative heat dissipation module 1 also includes folded fins 14, which are disposed between the first radiating plate 15 and the second radiating plate 16, and the folded fins 14 are in contact with both the first radiating plate 15 and the second radiating plate 16.

[0044] The gas manifold 11 includes two gas manifolds, one of which is configured to correspond to the first radiant plate 15, and the other of which is configured to correspond to the second radiant plate 16.

[0045] The liquid manifold 13 includes two, one of which is disposed corresponding to the first radiant plate 15, and the other liquid manifold 13 is disposed corresponding to the second radiant plate 16.

[0046] For example, heat exchange fins 25 can be provided between the front and rear heat exchange microchannels 12. The gas manifold 11 at the top of the two heat exchange microchannels 12 can be connected to the inlet pipe 17 by a T-connector, and the liquid manifold 13 at the bottom of the two heat exchange microchannels 12 can be connected to the outlet pipe 18 by a T-connector.

[0047] Figure 3 This is a schematic diagram of the structure of the integrated convection / radiation heat exchange terminal in another embodiment of the present invention; Figure 4 for Figure 3 Top view; such as Figure 3 and Figure 4As shown, for example, the gas manifold 11 and liquid manifold 13 of the radiant heat dissipation module 1 can also be directly connected to the external heat source module 3. The heat source module 3 can directly heat the heat transfer medium R1, causing the liquid heat transfer medium R1 to vaporize and enter the gas manifold 11, condense into liquid in the heat exchange microchannel 12, and then return to the liquid manifold 13 to form a cycle.

[0048] The horizontal tube 23 for heat transfer medium R1 and the horizontal tube 27 for heat transfer medium R2 are connected in contact via heat exchange fins 25.

[0049] For example, the heat transfer medium R3 is usually indoor air. Under the action of the first fan 21, outdoor air or unit return air 42 exchanges heat with heat exchange fins 25 and is then sent into the room by unit supply air 41.

[0050] The radiant heat dissipation module 1 also includes an air inlet pipe 17 and a liquid outlet pipe 18. The inlet of the air inlet pipe 17 is connected to the outlet of the second vertical pipe 24 for collecting heat transfer medium R1, and the outlet of the air inlet pipe 17 is connected to the inlet of the gas manifold 11. The inlet of the liquid outlet pipe 18 is connected to the outlet of the liquid manifold 13, and the outlet of the liquid outlet pipe 18 is connected to the inlet of the second vertical pipe 24 for collecting heat transfer medium R1.

[0051] The heat source module 3 may include one or more of the following: air source heat pump, water source heat pump chiller / hot water unit, solar collector, boiler, and urban heating network 37. The convection heat exchange module 2 may exchange heat directly with the heat source module 3 or indirectly.

[0052] Among them, the heat source module 3 is a single-heat type heat pump, including a throttling device 33, an outdoor heat exchanger 32 and a compressor 31 connected in sequence; the inlet of the throttling device 33 is connected to the outlet of the second vertical pipe 28 for collecting heat transfer medium R2, and the outlet of the compressor 31 is connected to the inlet of the first vertical pipe 26 for collecting heat transfer medium R2.

[0053] Among them, the heat source module 3 is a cold and hot type heat pump, including a throttling device 33, an outdoor heat exchanger 32, a compressor 31, and a four-way valve 35; the inlet of the throttling device 33 is connected to the outlet of the second vertical pipe 28 for collecting heat transfer medium R2, the outlet of the throttling device 33 is connected to the inlet of the outdoor heat exchanger 32, the outlet of the outdoor heat exchanger 32 is connected to the first inlet of the four-way valve 35, the first outlet of the four-way valve 35 is connected to the inlet of the compressor 31, the outlet of the compressor 31 is connected to the second inlet of the four-way valve 35, and the second outlet of the four-way valve 35 is connected to the inlet of the first vertical pipe 26 for collecting heat transfer medium R2.

[0054] The heat source module 3 is a chiller / hot water unit, including a plate heat exchanger 36, a throttling device 33, an outdoor heat exchanger 32, and a compressor 31. The plate heat exchanger 36 is filled with heat transfer medium R4. The first inlet of the plate heat exchanger 36 is connected to the outlet of the second vertical pipe 28 for collecting heat transfer medium R2, and the first outlet of the plate heat exchanger 36 is connected to the inlet of the first vertical pipe 26 for collecting heat transfer medium R2. The second outlet of the plate heat exchanger 36 is connected to the inlet of the throttling device 33, the outlet of the throttling device 33 is connected to the inlet of the outdoor heat exchanger 32, the outlet of the outdoor heat exchanger 32 is connected to the inlet of the compressor 31, and the outlet of the compressor 31 is connected to the second inlet of the plate heat exchanger 36.

[0055] The heat source module 3 is in the form of a city heating network 37, including a plate heat exchanger 36 and a city heating network 37. The plate heat exchanger 36 is filled with heat transfer medium R4, and the city heating network 37 is filled with heat transfer medium R5. The first inlet of the plate heat exchanger 36 is connected to the outlet of the second vertical pipe 28 for collecting heat transfer medium R2, and the first outlet of the plate heat exchanger 36 is connected to the inlet of the first vertical pipe 26 for collecting heat transfer medium R2. The inlet of the city heating network 37 is connected to the second inlet of the plate heat exchanger 36, and the outlet of the city heating network 37 is connected to the second outlet of the plate heat exchanger 36.

[0056] The heat source module 3 includes a second fan 34, which is adapted to the outdoor heat exchanger 32.

[0057] Figure 8 This is a schematic diagram of a convection / radiation integrated heat exchange terminal with a shut-off valve in one embodiment of the present invention, as shown below. Figure 8 As shown, the structure of the integrated convection / radiation heat exchange terminal also includes a shut-off valve 110, which is installed on the air inlet pipe 17 and is suitable for restricting the heat transfer medium R1 in the air inlet pipe 17 from entering the first radiant plate 15 or the second radiant plate 16. This configuration enables a single radiant plate heating mode, reducing the heating capacity.

[0058] When in use, the structural operation modes of this integrated convection / radiation heat exchange terminal include: convection mode, radiation mode, and coupling mode.

[0059] Winter heating mode: When heating starts, the coupling mode is used, the fan is fully open, and the terminal mainly relies on convection and radiation; the wind speed of the first fan 21 gradually decreases as the inlet air temperature of the convection terminal gradually increases until the set temperature is reached; when the inlet air temperature of the convection terminal reaches the set temperature, the radiation mode is used and the first fan 21 is turned off; when the inlet air temperature of the convection terminal drops to the set start temperature, the first fan 21 is restarted, and the output of heating capacity is controlled by the speed of the first fan 21 until the set temperature is reached.

[0060] Summer cooling mode: When cooling starts, convection mode is used, the first fan 21 is fully open, the radiant heat dissipation module 1 is not working, and the terminal mainly relies on convection. When the inlet air temperature of the convection terminal reaches the set temperature, the fan speed gradually decreases as the inlet air temperature of the convection terminal decreases until the indoor temperature approaches the set temperature, at which point the first fan 21 maintains a certain speed.

[0061] Scene 1:

[0062] The heat source module is a single-heat type heat pump, such as Figure 1 As shown, the process of each part is as follows: In the winter heating mode, in the heat source module, the compressor compresses and pressurizes the heat transfer medium R2 (usually refrigerant) into a high-temperature and high-pressure gaseous state, which enters the first vertical pipe 26 of the heat transfer medium R2 collector, and exchanges heat with the heat transfer medium R1 and heat transfer medium R3 (air) through the heat transfer medium R2 horizontal pipe 27 to become a high-temperature and high-pressure liquid refrigerant. It then returns to the heat source module 3 through the second vertical pipe 28 of the heat transfer medium R2 collector, and is throttled and depressurized by the throttling device 33 to become a low-temperature and low-pressure liquid refrigerant. In the outdoor heat exchanger 32, it exchanges heat with the fan to form a low-temperature and low-pressure gaseous refrigerant, which then enters the compressor 31 to form a heat source cycle.

[0063] In the convection heat exchange module 2, the high-grade heat transfer medium R2, which flows through the first vertical pipe 26 of the heat transfer medium R2 collection, enters the horizontal pipe 27 of the heat transfer medium R2. It exchanges heat with the heat transfer medium R1 by being in close contact with the horizontal pipe 23 of the heat transfer medium R1, and then returns through the second vertical pipe 28 of the heat transfer medium R2 collection. The grade (temperature) of the heat transfer medium R1, which flows through the first vertical pipe 22 of the heat transfer medium R1 collection, enters the horizontal pipe (23) of the heat transfer medium R1 and increases. Then, it returns to the radiation heat exchange module (1) through the second vertical pipe 24 of the heat transfer medium R1 collection. At this time, when the first fan is running, the horizontal pipe 23 of the heat transfer medium R1, the horizontal pipe 27 of the heat transfer medium R2, and the heat exchange fins 25 heat the air in the unit return air 42, forming a high-temperature unit supply air 41 that exchanges heat with the room, thus forming convection heat exchange.

[0064] In the radiant heat exchange module 1, the high-grade (temperature) heat transfer medium R1 flows through the second vertical pipe 24, then through the inlet pipe 17, and into the gas manifold 11. It is then distributed into different heat exchange microchannels 12, where it undergoes radiant heat exchange to become a low-grade (temperature) heat transfer medium R1. This low-grade (temperature) heat transfer medium R1 then enters the liquid manifold 13 and the outlet pipe 18, and finally flows through the first vertical pipe 22 into the convection heat exchange module 2. At this point, the system can achieve natural convection and radiant heat exchange with the air and the indoor enclosure structure through the first radiant plate 15, the second radiant plate 16, the folded fins 14, and the natural convection channel 19.

[0065] When the first fan 21 is running, the terminal realizes the convection / radiation coupled heat exchange mode; when the first fan 21 is turned off, the terminal realizes the radiation heat exchange mode (including natural convection).

[0066] Scene 2:

[0067] Figure 5 This is a schematic diagram of the structure of an integrated convection / radiation heat exchange terminal in another embodiment of the present invention. When the heat source module is a cooling / heating type heat pump, it can also achieve cooling operation in summer, such as... Figure 5 As shown, at this time, the four-way valve reverses, and the heat source module 3 becomes the cold source module. The compressor 31 compresses and pressurizes the heat transfer medium R2 (usually refrigerant) into a high-temperature and high-pressure gaseous state. In the outdoor heat exchanger 32, under the action of the second fan, heat exchange occurs to form a high-temperature and high-pressure liquid refrigerant. After being throttled and depressurized by the throttling device 33, it becomes a low-temperature and low-pressure liquid refrigerant. It enters the second vertical pipe 28 of the heat transfer medium R2 collector and exchanges heat with the heat transfer medium R1 and the heat transfer medium R3 (air) through the heat transfer medium R2 horizontal pipe 27 to form a low-temperature and low-pressure gaseous refrigerant. Then, it returns to the heat source module 3 through the first vertical pipe 26 of the heat transfer medium R2 collector.

[0068] In the convection heat exchange module 2, the high-grade heat transfer medium R2, which flows through the second vertical pipe 28, enters the horizontal pipe 27 and exchanges heat with the heat transfer medium R1 through the horizontal pipe 23. It then returns through the first vertical pipe 26. At this time, when the first fan 21 is running, the horizontal pipes 23 and 27, along with the heat exchange fins 25, lower the air temperature of the unit's return air 42, creating low-temperature unit supply air that exchanges heat with the indoor air, thus forming convection heat exchange.

[0069] The radiative heat exchange module is not working at this time. When the first fan 21 is running, the terminal realizes the convective heat exchange mode.

[0070] Scene 3:

[0071] Figure 6 This is a schematic diagram of the structure of an integrated convection / radiation heat exchange terminal in another embodiment of the present invention; the heat source module is in the form of a chiller / hot water unit, such as... Figure 6 As shown, the radiative heat dissipation module and the convective heat transfer module have the same structure as in Scenario 1.

[0072] The heat source module 3 includes a compressor 31, an outdoor heat exchanger 32, a throttling device 33, a second fan 34, and a plate heat exchanger 36 (condenser), which is filled with heat transfer medium R4. Additionally, the unit supply air 41 and unit return air 42 exchange heat with the convection heat exchange module 2, using heat transfer medium R3. In this embodiment, the heat transfer medium in the upper loop of the plate heat exchanger 36, i.e., the heat transfer medium R2 circulation loop, is no longer R2 but R4, while the heat transfer medium in the lower loop of the plate heat exchanger 36 remains R2. Thus, heat exchange between heat transfer mediums R2 and R4 can be achieved in the plate heat exchanger 36. The convection heat exchange module 2 achieves heat exchange between heat transfer mediums R1, R4, and R3 (air), with the heat exchange with air being a convection heat exchange mode. The radiation heat dissipation module 1 achieves radiation heat exchange of heat transfer medium R1.

[0073] Scene 4:

[0074] Figure 7 This is a schematic diagram of the structure of the integrated convection / radiation heat exchange terminal in another embodiment of the present invention; when the heat source module is in the form of an urban heating network, such as... Figure 7 As shown, the radiative heat dissipation module 1 and the convective heat transfer module 2 have the same structure as in scenario one.

[0075] The pipes of the urban heating network 37 are filled with heat transfer medium R5. Additionally, the unit supply air 41 and unit return air 42 exchange heat with the convection heat exchange module 2, using heat transfer medium R3. In this embodiment, the heat transfer medium in the upper loop of the plate heat exchanger 36, i.e., the heat transfer medium R2 circulation loop, is still R2, while the heat transfer medium in the lower loop of the plate heat exchanger 36 is R5. The plate heat exchanger 36 facilitates heat exchange between heat transfer mediums R5 and R2. The heat transfer medium R2, after heat exchange, enters the convection heat exchange module 2. The convection heat exchange module 2 facilitates heat exchange between heat transfer mediums R1, R2, and R3 (air), with the heat exchange with air being a convection heat exchange mode. The radiative heat dissipation module 1 facilitates radiative heat exchange of heat transfer medium R1.

[0076] The operation mode and control method of the integrated convection and radiation terminal structure are as follows:

[0077] Winter heating conditions:

[0078] Read terminal control operating parameters: These parameters include indoor temperature, heating set temperature, and start-up set temperature. When the terminal is running, if the indoor temperature is lower than the heating set temperature, the compressor and the first fan operate, and the terminal achieves convection / radiation coupled heat exchange mode. When the terminal is running, if the indoor temperature is higher than the heating set temperature, the compressor operates, the first fan shuts down, and the terminal achieves radiative heat exchange (including natural convection). When the terminal is running, if the indoor temperature is lower than the start-up set temperature, the compressor starts and both the first and second fans start until the set temperature is reached. When the terminal stops, the compressor shuts down and both the first and second fans shut down. It should be noted that the start-up set temperature is lower than the heating set temperature.

[0079] Summer cooling conditions:

[0080] The radiant heat dissipation module is not working. The terminal control operating parameters are read: these parameters include indoor temperature, cooling set temperature, and start-up set temperature. When the terminal is running, if the indoor temperature is higher than the cooling set temperature, the compressor and the first fan operate, and the terminal achieves convection heat exchange mode. When the terminal is running, if the indoor temperature is lower than the cooling set temperature, the compressor operates, and the first fan maintains a certain speed to stabilize the room temperature; the terminal still achieves convection heat exchange mode. When the terminal is running, if the indoor temperature is higher than the start-up set temperature, the compressor and the first fan both start until the set temperature is reached. When the terminal stops, the compressor and the first fan both turn off. It should be noted that the start-up set temperature is higher than the heating set temperature.

[0081] In this application, the radiative heat dissipation module is a heat exchanger that can realize radiative heat exchange. In this application, it is a microchannel heat exchanger with heat exchange microchannels, or it can be a terminal type such as a flat plate heat pipe that can realize radiative heat transfer.

[0082] The number of heat exchangers and first fans in this application is not limited to a specific number.

[0083] In summary, the structure of the integrated convection / radiation heat exchange terminal in this application uses only one air inlet pipe and one liquid outlet pipe for the radiation heat dissipation module, which reduces the number of connection ports and reduces the risk of leakage of the heat transfer medium R1.

[0084] The structure of the integrated convection / radiation heat exchange terminal in this application allows for a movable joint connection between the convection heat exchange module and the radiation heat dissipation module, which facilitates the adjustment of the charge amount of the heat transfer medium R1 and makes disassembly and maintenance easy in case of leakage.

[0085] The structure of the integrated convection / radiation heat exchange terminal in this application features a compact convection heat exchange module, high heat transfer efficiency between heat transfer medium R1 and heat transfer medium R2, easy modification of its convection heat transfer capacity, and the desired convection-radiation ratio can be achieved by matching radiation terminals of different areas. It is easy to develop and mass-produce products with different needs, and facilitates industrialization.

[0086] The structure of the integrated convection / radiation heat exchange terminal in this application can flexibly and efficiently switch between convection heat exchange mode, radiation heat exchange mode and convection / radiation coupling mode, solving the problem of rapid response and high comfort of heating terminals in the intermittent energy consumption mode of building heating "part of the time, part of the space".

[0087] The structure of the integrated convection / radiation heat exchange terminal in this application achieves integrated convection and radiation, and the terminal structure is compact, occupies a small area, and requires less material and investment.

[0088] The structure of the integrated convection / radiation heat exchange terminal in this application can meet the rapid heating needs under unsteady conditions in a timely manner during the start-up phase, thus solving the problem of slow response speed of single radiation heating under unsteady conditions.

[0089] The structure of the integrated convection / radiation heat exchange terminal in this application mainly operates in radiation heat exchange mode under steady state, thereby improving thermal comfort.

[0090] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A structure of a convection / radiation integrated heat exchange terminal, characterized by, At least including: The radiative heat dissipation module includes a first radiating plate and a second radiating plate facing each other, with the gap between them forming a natural convection channel; Both the first radiant plate and the second radiant plate are composed of several heat exchange microchannels arranged in parallel. A gas manifold is located upstream of the first radiant plate and the second radiant plate, and the air inlets of the heat exchange microchannels in the first radiant plate and the second radiant plate are all connected to the gas manifold. A liquid manifold is located downstream of the first radiant plate and the second radiant plate, and the liquid outlets of the heat exchange microchannels in the first radiant plate and the second radiant plate are all connected to the liquid manifold. It also includes a convection heat exchange module and a heat source module. The convection heat exchange module includes a heat transfer medium R1 circulation loop, a heat transfer medium R2 circulation loop, and a first fan. The heat transfer medium R2 circulation loop is connected to the heat source module, and the heat source module provides the energy required for heat exchange to the heat transfer medium R2 circulation loop. The heat transfer medium R1 circulation loop is in contact with the heat transfer medium R2 circulation loop so that heat exchange can occur between them. The first fan is adapted to the heat transfer medium R1 circulation loop and the heat transfer medium R2 circulation loop so that external air R3 can exchange heat when it flows through the heat transfer medium R1 circulation loop and the heat transfer medium R2 circulation loop. The outlet of the heat transfer medium R1 circulation loop is connected to the inlet of the gas manifold, and the inlet of the heat transfer medium R1 circulation loop is connected to the outlet of the liquid manifold.

2. The structure of the integrated convection / radiation heat exchange terminal according to claim 1, characterized in that, The heat transfer medium R1 circulation loop includes a heat transfer medium R1 collector first vertical pipe, a heat transfer medium R1 horizontal pipe, and a heat transfer medium R1 collector second vertical pipe connected in sequence. The inlet of the heat transfer medium R1 collector first vertical pipe is connected to the outlet of the liquid manifold, and the outlet of the heat transfer medium R1 collector second vertical pipe is connected to the inlet of the gas manifold. The heat transfer medium R2 circulation loop includes a first vertical pipe for collecting heat transfer medium R2, a horizontal pipe for collecting heat transfer medium R2, and a second vertical pipe for collecting heat transfer medium R2 connected in sequence. The inlet of the first vertical pipe for collecting heat transfer medium R2 is connected to the outlet of the heat source module, and the outlet of the second vertical pipe for collecting heat transfer medium R2 is connected to the inlet of the heat source module. The horizontal tube for heat transfer medium R1 is in contact with the horizontal tube for heat transfer medium R2.

3. The structure of the integrated convection / radiation heat exchange terminal according to claim 2, characterized in that, The horizontal tubes of heat transfer medium R1 and R2 are connected in contact via heat exchange fins.

4. The structure of the integrated convection / radiation heat exchange terminal according to claim 2, characterized in that, The radiative heat dissipation module also includes an air inlet pipe and a liquid outlet pipe; The inlet of the air inlet pipe is connected to the outlet of the second vertical pipe for collecting the heat transfer medium R1, and the outlet of the air inlet pipe is connected to the inlet of the gas manifold. The inlet of the liquid outlet pipe is connected to the outlet of the liquid manifold, and the outlet of the liquid outlet pipe is connected to the inlet of the second vertical manifold for collecting the heat transfer medium R1.

5. The structure of the integrated convection / radiation heat exchange terminal according to claim 1, characterized in that, The radiative heat dissipation module further includes folded fins disposed between the first radiating plate and the second radiating plate, and the folded fins are in contact with both the first radiating plate and the second radiating plate.

6. The structure of the integrated convection / radiation heat exchange terminal according to any one of claims 1-5, characterized in that, The gas manifold includes two gas manifolds, one of which is disposed corresponding to the first radiant plate and the other of which is disposed corresponding to the second radiant plate.

7. The structure of the integrated convection / radiation heat exchange terminal according to any one of claims 1-5, characterized in that, The liquid manifold includes two manifolds, one of which is disposed corresponding to the first radiant plate and the other of which is disposed corresponding to the second radiant plate.

8. The structure of the integrated convection / radiation heat exchange terminal according to claim 2, characterized in that, The heat source module is a single-heat type heat pump, which includes a throttling device, an outdoor heat exchanger and a compressor connected in sequence; The inlet of the throttling device is connected to the outlet of the second vertical pipe of the heat transfer medium R2 collector, and the outlet of the compressor is connected to the inlet of the first vertical pipe of the heat transfer medium R2 collector.

9. The structure of the integrated convection / radiation heat exchange terminal according to claim 2, characterized in that, The heat source module is a cold-heat type heat pump, including a throttling device, an outdoor heat exchanger, a compressor, and a four-way valve; The inlet of the throttling device is connected to the outlet of the second vertical pipe for collecting the heat transfer medium R2, the outlet of the throttling device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the first inlet of the four-way valve, the first outlet of the four-way valve is connected to the inlet of the compressor, the outlet of the compressor is connected to the second inlet of the four-way valve, and the second outlet of the four-way valve is connected to the inlet of the first vertical pipe for collecting the heat transfer medium R2.

10. The structure of the integrated convection / radiation heat exchange terminal according to claim 2, characterized in that, The heat source module is in the form of a chilled water unit, including a plate heat exchanger, a throttling device, an outdoor heat exchanger, and a compressor; The plate heat exchanger is filled with heat transfer medium R4. The first inlet of the plate heat exchanger is connected to the outlet of the second vertical pipe of the heat transfer medium R2 collector, and the first outlet of the plate heat exchanger is connected to the inlet of the first vertical pipe of the heat transfer medium R2 collector. The second outlet of the plate heat exchanger is connected to the inlet of the throttling device, the outlet of the throttling device is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the compressor, and the outlet of the compressor is connected to the second inlet of the plate heat exchanger.

11. The structure of the integrated convection / radiation heat exchange terminal according to claim 2, characterized in that, The heat source module is in the form of an urban heating network, including a plate heat exchanger and an urban heating network; The plate heat exchanger is filled with heat transfer medium R4, and the urban heating network is provided with heat transfer medium R5. The first inlet of the plate heat exchanger is connected to the outlet of the second vertical pipe of the heat transfer medium R2, and the first outlet of the plate heat exchanger is connected to the inlet of the first vertical pipe of the heat transfer medium R2. The inlet of the urban heating network is connected to the second inlet of the plate heat exchanger, and the outlet of the urban heating network is connected to the second outlet of the plate heat exchanger.

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