Radiation heat exchanger, indoor unit and heating and ventilation equipment

Abstract

The utility model discloses a radiation heat exchanger, an indoor unit and heating and ventilation equipment. The radiation heat exchanger comprises a pipeline assembly, a fin assembly and a radiation plate. The pipeline assembly is used for allowing a refrigerant to flow; the fin assembly is connected to one side of the pipeline assembly; the radiation plate is connected to the other side of the pipeline assembly and provided with a radiation surface, and the radiation surface is arranged back to the fin assembly. The radiation heat exchanger is good in heat exchange performance.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and particularly to a radiation heat exchanger, an indoor unit using the radiation heat exchanger, and a heating and ventilation equipment using the indoor unit. Background Art

[0002] Generally, in indoor heating equipment, a radiation heat exchanger is used. The radiation heat exchanger usually transfers heat from one substance to another by radiation.

[0003] In the related art, the radiation heat exchanger includes a header pipe, a microchannel pipe, and a plurality of fins. Among them, there are two header pipes, both of which are connected to the system piping. One header pipe is used to realize the inflow of the refrigerant, and the other header pipe is used to realize the outflow of the refrigerant. The microchannel pipe is connected between the two header pipes, and the fins are welded to the microchannel pipe.

[0004] However, in the above-mentioned radiation heat exchanger, the heat transfer between the fins and the microchannel pipe is used to heat the indoor environment. In this way, the heat transfer effect of the radiation heat exchanger is poor, and thus the heating effect of the heating equipment is poor. Summary of the Utility Model

[0005] The main purpose of the present application is to provide a radiation heat exchanger, an indoor unit, and a heating and ventilation equipment, which can improve the heat transfer effect of the radiation heat exchanger.

[0006] In a first aspect, the present application provides a radiation heat exchanger, including a pipe assembly, a fin assembly, and a radiation plate; the pipe assembly is used for the refrigerant to flow; the fin assembly is connected to one side of the pipe assembly; the radiation plate is connected to the other side of the pipe assembly, and the radiation plate has a radiation surface, and the radiation surface is arranged facing away from the fin assembly.

[0007] As an optional implementation manner, the pipe assembly includes a microchannel pipe and two header pipes; the two header pipes are arranged at intervals, and the microchannel pipe is connected between the two header pipes; the fin assembly is connected to the microchannel pipe.

[0008] As an optional implementation manner, the fin assembly includes a plurality of fin units arranged at intervals along the extension direction of the microchannel pipe, and a flow channel is formed between two adjacent fin units; the flow channel extends in the height direction of the radiation heat exchanger.

[0009] As an optional implementation manner, the sizes of the plurality of flow channels in the extension direction of the microchannel pipe are equal.

[0010] As an optional implementation manner, the fin assembly includes a substrate and a plurality of protrusions formed on the substrate; one protrusion forms one fin unit, and the protrusion protrudes in a direction away from the radiation surface.

[0011] As an optional embodiment, the protrusion includes a first heat exchange section, a second heat exchange section and a third heat exchange section; one end of the first heat exchange section and one end of the second heat exchange section are both connected to the substrate, the other end of the first heat exchange section and the other end of the second heat exchange section both extend toward the side away from the radiation surface and are connected to the third heat exchange section, and the other end of the first heat exchange section and the other end of the second heat exchange section are located on the same plane.

[0012] As an optional embodiment, multiple protrusions have the same shape and are equal in size; the size of the third heat exchange section in the extension direction of the microchannel pipeline is L1, the sum of the sizes of the microchannel pipeline and the radiation plate in the thickness direction of the radiation plate is L2, and the distance between the third heat exchange section and the microchannel pipeline is L3; wherein L1 is greater than L2, and L3 is greater than 1.5 times of L1.

[0013] As an optional implementation, the fin assembly includes a plurality of fins arranged at intervals along the extension direction of the microchannel pipeline, and one fin forms a fin unit.

[0014] As an optional implementation, the multiple fins have the same shape and are equal in size.

[0015] As an optional implementation, the radiation plate has a mounting surface disposed opposite to the radiation surface; the projections of the pipe assembly and the fin assembly on the plane where the mounting surface is located both fall within the mounting surface.

[0016] In a second aspect, the present application provides an indoor unit, comprising a shell assembly, a fan assembly, a convection heat exchanger and the above-mentioned radiation heat exchanger, wherein an installation cavity is formed inside the shell assembly; the fan assembly is arranged in the installation cavity, the fan assembly comprises a fan casing and a fan connected together, the fan casing and the shell assembly are connected to enclose a convection heat exchange channel, and the fan is located in the convection heat exchange channel; the convection heat exchanger is arranged in the convection heat exchange channel, and is arranged at intervals with the fan in the flow direction of the airflow; the radiation heat exchanger is installed in the shell assembly, and is arranged in parallel with the convection heat exchanger, the radiation heat exchanger is located outside the installation cavity, the radiation surface forms part of the appearance surface of the indoor unit, and the radiation heat exchanger and the shell assembly are enclosed to form a radiation heat exchange channel.

[0017] As an optional embodiment, the convection heat exchange channel has a convection air inlet and a convection exhaust port, and the radiation heat exchange channel has a radiation air inlet and a radiation exhaust port, and the radiation air inlet is located below the radiation exhaust port; wherein the convection air inlet is arranged adjacent to the radiation air inlet.

[0018] As an optional implementation, a filter element is connected between the shell assembly and the radiation heat exchanger, and the filter element is arranged at the radiation air inlet; a plurality of filter holes distributed at intervals are formed on the filter element.

[0019] In a third aspect, the present application provides a heating, ventilation and air conditioning (HVAC) device, including an outdoor unit and the indoor unit described above.

[0020] In the radiation heat exchanger, indoor unit and HVAC device according to the embodiments of the present application, by combining the pipe assembly, fin assembly and radiation plate, on the one hand, heat can be dissipated to the indoor space through the fin assembly by utilizing the heat exchange between the fin assembly and the pipe assembly, and on the other hand, heat can be radiated to the indoor space through the radiation plate by utilizing the heat exchange between the radiation plate and the pipe assembly. Thus, compared with the radiation heat exchanger in the related art, the radiation heat exchanger provided by the embodiments of the present application can provide more heat to the indoor space, improve the heat exchange effect of the radiation heat exchanger, and further improve the heating effect of the indoor unit provided by the embodiments of the present application in the radiation heating mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0022] Figure 1 Schematic perspective view of the radiation heat exchanger provided by the embodiment of the present application;

[0023] Figure 2 Exploded view of the radiation heat exchanger provided by the embodiment of the present application;

[0024] Figure 3 Exploded view of the radiation heat exchanger provided by the embodiment of the present application from another perspective;

[0025] Figure 4 Schematic plan view of the radiation heat exchanger provided by the embodiment of the present application;

[0026] Figure 5 For Figure 4 Partial enlarged schematic view of the structure at A in

[0027] Figure 6 Schematic perspective view of the indoor unit provided by the embodiment of the present application;

[0028] Figure 7 Exploded view of the indoor unit provided by the embodiment of the present application;

[0029] Figure 8 Schematic plan view of the indoor unit provided by the embodiment of the present application;

[0030] Figure 9 ForFigure 8 Cross-sectional view along the B-B direction;

[0031] Figure 10 It is a refrigerant flow diagram of the heating and ventilation equipment provided by the embodiment of the present application in the refrigeration mode;

[0032] Figure 11 It is a refrigerant flow diagram of the heating and ventilation equipment provided by the embodiment of the present application in the convective heating mode;

[0033] Figure 12 It is a refrigerant flow diagram of the heating and ventilation equipment provided by the embodiment of the present application in the radiant heating mode.

[0034] Explanation of the reference numerals in the drawings:

[0035] 1. Pipe assembly; 2. Fin assembly; 3. Radiation plate; 4. Connection seat;

[0036] 10. Radiation heat exchanger; 11. Microchannel pipeline; 12. Header; 13. Joint; 21. Fin unit; 22. Flow channel; 23. Substrate; 24. Protrusion; 31. Radiation surface; 32. Mounting surface; 41. Support notch; 20. Housing assembly; 30. Fan assembly; 40. Convective heat exchanger; 50. Convective heat exchange channel; 60. Radiation heat exchange channel; 70. First regulating valve; 80. Second regulating valve; 90. Grille;

[0037] 111. Flat tube; 121. Liquid separation port; 241. First heat exchange section; 242. Second heat exchange section; 243. Third heat exchange section; 100. Indoor unit; 201. Housing main body; 202. Support member; 203. Installation cavity; 301. Fan housing; 302. Fan; 501. First channel section; 502. Second channel section; 503. Convective air inlet; 504. Convective air outlet; 601. Radiation air inlet; 602. Radiation air outlet; 901. First protection part; 902. Second protection part; 110. Support part; 120. Flow guide member; 130. Pipe assembly; 140. Throttle valve; 150. Water receiving tray; 200. Outdoor unit;

[0038] 2011. Back plate; 2012. Enclosure; 2013. First installation groove; 2021. Second installation groove; 2022. Support plate; 2023. Extension plate; 2024. Flange; 5031. Air inlet opening; 5032. Air inlet hole; 1101. Weight reduction groove; 2001. Compressor; 2002. Outdoor heat exchanger;

[0039] 2012a. Top enclosure; 2012b. Bottom enclosure; 2012c. Side enclosure.

[0040] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0042] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present application, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0045] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0046] In the related art, a radiation heat exchanger includes a header pipe, a microchannel pipeline, and a plurality of fins. Among them, there are two header pipes, both of which are connected to the system piping. One header pipe is used to realize the inflow of the refrigerant, and the other header pipe is used to realize the outflow of the refrigerant. The microchannel pipeline is connected between the two header pipes, and the fins are welded to the microchannel pipeline.

[0047] However, in the above-mentioned radiation heat exchanger, the heat exchange between the fins and the micro-channel pipeline is used to heat the indoor environment. In this way, the heat exchange effect of the radiation heat exchanger is poor, and thus the heating effect of the heating equipment is poor.

[0048] Therefore, in this embodiment, a radiation heat exchanger, an indoor unit, and a heating, ventilation, and air conditioning (HVAC) equipment are provided. By combining the fin assembly with the radiation plate, the heat exchange effect of the radiation heat exchanger is better.

[0049] The following will introduce the embodiments of the present application in detail with reference to the drawings and specific implementation manners.

[0050] Please refer to Figures 1 to 3 , Figure 1 which is a three-dimensional structure diagram of the radiation heat exchanger provided by the embodiment of the present application, Figure 2 which is an exploded view of the radiation heat exchanger provided by the embodiment of the present application, Figure 3 which is an exploded view of the radiation heat exchanger provided by the embodiment of the present application from another perspective. As shown in the figure, this embodiment provides a radiation heat exchanger 10, which includes a pipe assembly 1, a fin assembly 2, and a radiation plate 3. The pipe assembly 1 is used for the refrigerant to flow; the fin assembly 2 is connected to one side of the pipe assembly 1; the radiation plate 3 is connected to the other side of the pipe assembly 1. The radiation plate 3 has a radiation surface 31, and the radiation surface 31 is arranged facing away from the fin assembly 2.

[0051] In the radiation heat exchanger 10 provided in this embodiment, by respectively arranging the fin assembly 2 and the radiation plate 3 on both sides of the pipe assembly 1, on the one hand, the heat exchange between the fin assembly 2 and the pipe assembly 1 can be utilized to dissipate the heat to the indoor space through the fin assembly 2. On the other hand, the heat exchange between the radiation plate 3 and the pipe assembly 1 can be used to radiate the heat to the indoor space through the radiation plate 3. Therefore, compared with the radiation heat exchanger in the related art, the radiation heat exchanger 10 provided in this embodiment can provide more heat to the indoor space, making the heat exchange effect of the radiation heat exchanger 10 provided in this embodiment better.

[0052] It should be noted that in order to keep the fin assembly 2 and the radiation plate 3 having good heat transfer performance, the materials of the fin assembly 2 and the radiation plate 3 can be metal materials such as copper or aluminum, etc. Here, the materials of the fin assembly 2 and the radiation plate 3 are not specifically limited.

[0053] In some implementation manners, the pipe assembly 1 includes a micro-channel pipeline 11 and two header pipes 12; the two header pipes 12 are arranged at intervals, and the micro-channel pipeline 11 is connected between the two header pipes 12; the fin assembly 2 is connected to the micro-channel pipeline 11.

[0054] Specifically, the microchannel pipeline 11 includes a plurality of flat tubes 111 arranged at intervals. The manifold 12 is provided with a plurality of liquid distribution ports 121 along its own extending direction. The plurality of liquid distribution ports 121 are arranged in one-to-one correspondence with the plurality of flat tubes 111. Both ends of the flat tube 111 are communicated with two manifolds 12 respectively. Since the radiation heat exchanger 10 is mostly used in heating equipment, one of the two manifolds 12 is used for the refrigerant to flow in, and the other is used for the refrigerant to flow out. Therefore, a joint 13 for connecting with other pipelines needs to be connected to the manifold 12 to realize the inflow and outflow of the refrigerant.

[0055] It can be understood that the larger the area of the radiation surface 31 is, the more heat can be radiated through the radiation plate 3. Therefore, in some alternative embodiments, the radiation plate 3 has a mounting surface 32 arranged opposite to the radiation surface 31; the projections of the pipe assembly 1 and the fin assembly 2 on the plane where the mounting surface 32 is located both fall within the mounting surface 32. In this way, the plate area of the radiation plate 3, that is, the area of the radiation surface 31, is larger, so that more heat is radiated from the radiation plate 3, and the heat exchange performance of the radiation heat exchanger 10 provided in this embodiment can be further improved.

[0056] It should be noted that the connection manner between the manifold 12 and the radiation plate 3 can be welding. Since the outer wall surface of the manifold 12 is a rotary surface, in order to improve the connection reliability between the manifold 12 and the radiation plate 3, a connection seat 4 for supporting and connecting the manifold 12 can be provided on the back side of the radiation plate 3. A support notch 41 adapted to the shape of the manifold 12 can be provided on the connection seat 4. The connection between the manifold 12 and the radiation plate 3 is realized through the cooperation connection between the support notch 41 and the manifold 12.

[0057] Of course, the connection manner between the flat tube 111 and the manifold 12 and the connection manner between the flat tube 111 and the fin assembly 2 can also both adopt the welding connection manner, which is not specifically limited here.

[0058] In addition to making the area of the radiation surface 31 larger, the heat exchange effect of the radiation heat exchanger 10 can also be improved by increasing the heat exchange area of the fin assembly 2. Therefore, please combine Figure 4 , Figure 4This is a schematic plan view of the radiation heat exchanger provided by the embodiment of the present application. Specifically, in this embodiment, the fin assembly 2 includes a plurality of fin units 21 arranged at intervals along the extension direction of the microchannel pipeline 11, and a flow channel 22 is formed between two adjacent fin units 21; the flow channel 22 extends in the height direction of the radiation heat exchanger 10. In this way, by forming the flow channel 22 between two adjacent fin units 21, air can also flow into the flow channel 22, so that the air in the flow channel 22 can be heated. Thus, more gas in contact with the fin assembly 2 is obtained, that is to say, the heat exchange area of the fin assembly 2 is increased, and the heat exchange performance of the radiation heat exchanger 10 can be further improved.

[0059] It should be noted that the height direction of the above-mentioned radiation heat exchanger 10 is consistent with Figures 1 to 3 the z-z axis direction in

[0060] In some alternative embodiments, in order to improve the convenience of setting the fin assembly 2, the dimensions of the plurality of flow channels 22 in the extension direction of the microchannel pipeline 11 are equal. In this way, not only is it convenient to set the fin assembly 2 to form a plurality of fin units 21, but also when the dimensions of the plurality of flow channels 22 in the extension direction of the microchannel pipeline 11 are equal, the air flow rate through each flow channel 22 can be ensured to be equivalent. Thus, the temperatures in various parts of the indoor environment can be the same or nearly the same, thereby improving the comfort of users.

[0061] There are two specific implementation manners for forming a plurality of fin units 21, and the following will introduce these two manners one by one.

[0062] In the first implementation manner, the fin assembly 2 can be formed by bending an aluminum plate or a copper plate. Specifically, the fin assembly 2 includes a base plate 23 and a plurality of protruding portions 24 formed on the base plate 23; one protruding portion 24 forms one fin unit 21, and the protruding portion 24 protrudes in a direction away from the radiation surface 31.

[0063] Please continue to refer to Figure 5 , Figure 5 which is Figure 4 a schematic enlarged view of the partial structure at A in

[0064] It should be noted that in this embodiment, the other ends of the first heat exchange section 241 and the second heat exchange section 242 are close to each other. That is to say, the cross-sectional shape of the protruding portion 24 is trapezoidal, and in order to facilitate the formation of the protruding portion 24, the cross-sectional shape of the protruding portion 24 can also be an isosceles trapezoid. Here, no specific limitation is imposed on the cross-sectional shape of the protruding portion 24.

[0065] In order to maintain the consistency of the flow rates of the hot air flowing out of the multiple flow channels 22, in some specific embodiments, the shapes of the multiple protruding portions 24 are the same and the sizes are equal. In this way, the multiple flow channels 22 can maintain the consistency of shape and size, so that the flow rates of the hot air flowing out after passing through each flow channel 22 are relatively consistent, and thus the temperature of the indoor environment is relatively appropriate, improving the comfort of the user.

[0066] It can be understood that if the gas flow velocity in the flow channel 22 can be accelerated, the heat exchange efficiency of the radiant heat exchanger 10 can be improved. That is to say, in order to make the hot air in the flow channel 22 flow upward and promote the cold air outside to flow into the flow channel 22, in some embodiments, it is necessary to limit the size of the flow channel 22, that is, the cross-sectional area of the flow channel 22. Specifically, the size of the third heat exchange section 243 in the extending direction of the microchannel pipeline 11 is L1, the sum of the sizes of the microchannel pipeline 11 and the radiation plate 3 in the thickness direction of the radiation plate 3 is L2, and the distance between the third heat exchange section 243 and the microchannel pipeline 11 is L3; wherein, L1 is greater than L2, and L3 is greater than 1.5 times of L1. In this way, the air flow in the flow channel 22 can form a chimney effect to improve the heat exchange efficiency of the radiant heat exchanger 10.

[0067] In the second embodiment, the fin assembly 2 includes a plurality of fins (not shown in the figure) arranged at intervals along the extending direction of the microchannel pipeline 11, and one fin forms one fin unit 21. That is to say, the fins here are single aluminum sheets or copper sheets, and the single fins are welded on the microchannel pipeline 11, and the flow channels 22 are formed between two fins.

[0068] In order to make the shapes and sizes of the multiple flow channels 22 keep consistent, in the specific embodiments of this embodiment, the shapes of the multiple fins are the same and the sizes are equal. In this way, the consistency of the shapes and sizes of the multiple flow channels 22 can be maintained, so that the flow rates of the hot air flows flowing out of each flow channel tend to be consistent, and thus the temperature of the indoor environment is relatively appropriate, improving the comfort of the user.

[0069] Please refer to Figures 6 to 8 , Figure 6 which is the three-dimensional structure schematic diagram of the indoor unit provided by the embodiment of the present application, Figure 7 which is the exploded view of the indoor unit provided by the embodiment of the present application, Figure 8It is a schematic plan view of the indoor unit provided by the embodiment of the present application. Figure 9 It is Figure 8 a cross-sectional view along the B-B direction. As shown in the figure, the present embodiment also provides an indoor unit 100. In addition to the radiation heat exchanger 10 in the above-mentioned embodiment, the indoor unit 100 provided in this embodiment further includes a housing assembly 20, a fan assembly 30, and a convection heat exchanger 40.

[0070] Among them, the housing assembly 20 includes a housing main body 201 and a support member 202 connected together. Among them, the housing main body 201 includes a back plate 2011 and a plurality of enclosing plates 2012 surrounding the periphery of the back plate 2011. The plurality of enclosing plates 2012 and the back plate 2011 enclose a first installation groove 2013. The support member 202 is connected to the housing main body 201 and seals the notch of the first installation groove 2013. The support member 202 and the groove wall of the first installation groove 2013 enclose an installation cavity 203.

[0071] Taking the posture of the indoor unit 100 during use as an example for illustration, the above-mentioned back plate 2011 may be a rectangular plate, and the plurality of enclosing plates 2012 surrounding the periphery of the back plate 2011 may include a top enclosing plate 2012a provided at the top end of the back plate 2011, a bottom enclosing plate 2012b provided at the bottom end of the back plate 2011, and side enclosing plates 2012c provided on the left and right sides of the back plate 2011.

[0072] It should be noted that for the up, down, left, and right directions of the indoor unit 100, reference can be made to Figure 6 and Figure 8 the indicated directions therein.

[0073] Among them, the top enclosing plate 2012a, the bottom enclosing plate 2012b, and the back plate 2011 are integrally formed together. The side enclosing plate 2012c and the back plate 2011, the side enclosing plate 2012c and the top enclosing plate 2012a, and the side enclosing plate 2012c and the bottom enclosing plate 2012b can all be connected by a detachable connection method, for example, by a connection method such as a threaded fastener.

[0074] It should be noted that the support member 202 is a sheet metal part, and the connection method between the support member 202 and the housing main body 201 can also be a detachable connection, for example, by a threaded fastener. Specifically, the top end of the support member 202 is connected to the top enclosing plate 2012a, and the bottom end of the support member 202 is connected to the bottom enclosing plate 2012b. Of course, in some other embodiments, it can also be that the opposite sides of the support member 202 are respectively connected to the two side enclosing plates 2012c. Here, the connection method between the support member 202 and the housing main body 201 is not specifically limited.

[0075] Further, the fan assembly 30 includes a fan housing 301 and a fan 302 connected together. The fan housing 301 is connected to the housing assembly 20 to enclose a convective heat exchange channel 50. The fan housing 301 can be connected to the back panel 2011 or the side enclosing panels 2012c on both sides. The connection method here can be through threaded fasteners. Here, the connection method between the fan housing 301 and the housing assembly 20 is not specifically limited.

[0076] It can be understood that the fan housing 301 is provided for installing the fan 302 and forming part of the convective heat exchange channel 50. Therefore, the fan 302 is located inside the convective heat exchange channel 50. Specifically, the convective heat exchange channel 50 includes a first channel section 501 and a second channel section 502 that are connected. The first channel section 501 is constructed by the housing assembly 20, and the second channel section 502 is constructed by the fan housing 301. The fan 302 is located inside the second channel section 502.

[0077] During the operation of the fan 302, in order to achieve cooling or heating of the indoor environment, the convective heat exchanger 40 also needs to be arranged inside the convective heat exchange channel 50 and spaced apart from the fan 302 in the air flow direction. Specifically, the convective heat exchanger 40 is located inside the first channel section 501, and the convective heat exchanger 40 is connected to the back panel 2011. In the specific implementation of this embodiment, the convective heat exchanger 40 is located on the upstream side of the fan 302.

[0078] Since the heat exchange efficiency of the radiation heat exchanger 10 is relatively high, therefore, directly contacting the radiation heat exchanger 10 with the indoor environment can further improve the heat exchange effect of the radiation heat exchanger 10. Based on this, in this embodiment, the radiation heat exchanger 10 is located outside the installation cavity 203. Part of the outer surface of the radiation heat exchanger 10 forms part of the appearance surface of the indoor unit 100. The radiation heat exchanger 10 is arranged in parallel with the convective heat exchanger 40, and the radiation heat exchanger 10 is installed on the support member 202, and a radiation heat exchange channel 60 is enclosed between the radiation heat exchanger 10 and the support member 202.

[0079] In this embodiment, both of the two manifold tubes 12 of the radiation heat exchanger 10 are connected to the piping assembly 130 through the connectors 13 thereon.

[0080] It should be noted that in this embodiment, the radiation heat exchanger 10 does not operate in every working mode.

[0081] Specifically, when the indoor unit 100 is in the cooling mode, the fan 302 drives the outside air flow to flow to the outside environment through the convective heat exchange channel 50. That is to say, when the indoor unit 100 is in the cooling mode, only the convective heat exchanger 40 operates to exchange heat with the indoor environment to achieve the cooling function.

[0082] When the indoor unit 100 is in the heating mode, the convection heat exchanger 40 and the radiation heat exchanger 10 work alternately. Specifically, the indoor unit 100 has a convection heating mode and a radiation heating mode, and the indoor unit 100 is set with a preset temperature. When the outside temperature is lower than the preset temperature, the indoor unit 100 is in the convection heating mode, and the fan 302 drives the outside air flow to flow to the outside environment through the convection heat exchange channel 50. When the outside temperature is greater than or equal to the preset temperature, the indoor unit 100 is in the radiation heating mode, and the outside air flow flows to the outside environment through the radiation heat exchange channel 60. That is to say, when the indoor unit 100 is in the convection heating mode, only the convection heat exchanger 40 works, and when the indoor unit 100 is in the radiation heat exchange mode, only the radiation heat exchanger 10 works. Please refer to Figure 9 , where the direction of the solid arrow is the gas flow direction of the indoor unit 100 in the cooling mode and the convection heating mode, and the direction of the dashed arrow is the gas flow direction of the indoor unit 100 in the radiation heating mode.

[0083] Among them, it is not difficult to see that for the radiation heat exchange channel 60, the incoming air flow should be cold air, the outgoing air flow should be hot air, and the air flow directly radiated by the radiation heat exchanger 10 should also be hot air.

[0084] That is to say, when the indoor unit 100 is in the heating mode, as long as the outside temperature is greater than or equal to the preset temperature, the fan 302 will stop rotating, and the convection heat exchanger 40 will not work. At this time, since the rotation of the fan 302 has stopped, there is no noise caused by the rotation of the fan 302. Moreover, under the action of the radiation heat exchanger 10, the heat generated during the flow of the refrigerant will be in a radiation shape, and there is only convection heat exchange at both ends of the radiation heat exchange channel 60. There is no strong hot air blowing to the user during this process, which will improve the user comfort of the indoor unit 100 in the heating mode. In addition, in the radiation heating mode, combining the convection heat exchange method and the radiation heat exchange method can improve the heating efficiency of the indoor unit 100 provided in this embodiment.

[0085] It should be noted that the above preset temperature can be 26°C, and the preset temperature here is determined according to the actual setting value of the indoor unit 100. Here, no specific limitation is made on the preset temperature.

[0086] Please refer to Figures 10 to 12 , Figure 10 is the refrigerant flow diagram of the HVAC equipment provided by the embodiment of the present application in the cooling mode, Figure 11 is the refrigerant flow diagram of the HVAC equipment provided by the embodiment of the present application in the convection heating mode, Figure 12This is the refrigerant flow diagram of the HVAC equipment provided by the embodiments of the present application in the radiant heating mode. In order to enable the indoor unit 100 to switch between the refrigeration mode, the convective heating mode, and the radiant heating mode, the indoor unit 100 provided in this embodiment further includes a first regulating valve 70 and a second regulating valve 80. The first regulating valve 70 is connected to the convective heat exchanger 40, and the second regulating valve 80 is connected to the radiant heat exchanger 10. When the indoor unit 100 is in the refrigeration mode and the convective heating mode, the first regulating valve 70 is opened, and the second regulating valve 80 is closed. When the indoor unit 100 is in the radiant heating mode, the first regulating valve 70 is closed, and the second regulating valve 80 is opened.

[0087] That is to say, when the first regulating valve 70 is opened and the second regulating valve 80 is closed, the refrigerant flows through the convective heat exchanger 40 and does not flow through the radiant heat exchanger 10. When the first regulating valve 70 is closed and the second regulating valve 80 is opened, the refrigerant flows through the radiant heat exchanger 10 and does not flow through the convective heat exchanger 40.

[0088] In some specific embodiments, both the first regulating valve 70 and the second regulating valve 80 can be globe valves. Here, the types of the first regulating valve 70 and the second regulating valve 80 are not specifically limited.

[0089] In the specific embodiments of this embodiment, the axial direction of the header pipe 12 and the extending direction of the flow channel 22 in the radiant heat exchanger 10 are both consistent with the up-down direction of the indoor unit 100, and the dimensions of the header pipe 12 in the up-down direction of the indoor unit 100 are quite the same. Therefore, it can be understood that the length of the header pipe 12 in its own extending direction is relatively large. Thus, the above-mentioned connecting seats 4 can be arranged at intervals in the extending direction of the header pipe 12 to achieve a reliable connection between the header pipe 12 and the radiant plate 3.

[0090] Specifically, the radiant heat exchange channel 60 has a radiant air inlet 601 and a radiant air outlet 602. When the indoor unit 100 is in the radiant heating mode, cold air flows into the radiant heat exchange channel 60 from the radiant air inlet 601, and hot air flows out of the radiant heat exchange channel 60 from the radiant air outlet 602 and then flows into the indoor space to achieve the corresponding heating function.

[0091] It can be understood that the molecular movement speed of hot air is relatively fast, and the distance between molecules is relatively large. Therefore, the volume of hot air is relatively large, the density is relatively small, and the weight is relatively light. Therefore, when the indoor unit 100 is in the radiant heating mode, the hot air will flow upward. Thus, in this embodiment, the radiant air inlet 601 is located below the radiant air outlet 602. Moreover, when the hot air rises, the surrounding heavier air will flow downward, and thus a convection will be formed. Therefore, when the indoor unit 100 is in the radiant heating mode, not only convective heating can be achieved, but also radiant heating can be achieved.

[0092] That is to say, when the extending direction of the flow channel 22 is consistent with the up-down direction of the indoor unit 100, the flowing direction of the air in the flow channel 22 is made consistent with the flowing direction of the air current in the radiation heat exchange channel 60. Thus, it is beneficial to the heat exchange between the radiation heat exchanger 10 and the indoor environment.

[0093] When the external cold air flows into the radiation heat exchange channel 60 through the radiation air inlet 601, if other dust and other particulate matters are mixed in the external cold air, it will affect the flow of the air current in the radiation heat exchange channel 60, and further have an adverse effect on the heat exchange effect of the radiation heat exchanger 10. Therefore, in some alternative embodiments, a filter element (not shown in the figure) may be connected between the support member 202 and the radiation heat exchanger 10, and the filter element is arranged at the radiation air inlet 601; a plurality of filter holes are formed in the filter element at intervals. It should be noted that the filter element here may be a filter net, and the filter net may be directly welded between the radiation plate 3 and the support member 202, or the filter net may be adhered to the support by setting a support, and the support is connected between the radiation plate 3 and the support member 202. Here, the specific form of the filter element and the connection relationship between the filter element and the support member 202 and the radiation plate 3 are not specifically limited.

[0094] If the air intake of the radiation heat exchange channel 60 can be increased, the amount of hot air discharged from the radiation air outlet 602 can be increased. When the amount of the discharged hot air is large, the rapid drop of the temperature of the indoor environment can be effectively avoided. Thus, the heat exchange efficiency of the radiation heat exchanger 10 and the heating effect of the indoor unit 100 can also be improved. Therefore, in some embodiments, the convective heat exchange channel 50 has a convective air inlet 503 and a convective air outlet 504, and the convective air inlet 503 is arranged adjacent to the radiation air inlet 601. Thus, when the indoor unit 100 is in the radiation heating mode, the gas source entering the radiation heat exchange channel 60 not only comes from the convection of the gas, but also comes from the indoor unit 100 in the convective heating mode. Since a negative pressure is formed at the convective air inlet 503, due to the action of the negative pressure, a certain amount of gas input can also be provided to the radiation heat exchange channel 60. In this way, the heat exchange efficiency of the radiation heat exchanger 10 can be improved, and the heating effect of the indoor unit 100 can be improved.

[0095] In some embodiments, in order to improve the appearance of the indoor unit 100 provided in this embodiment and to facilitate the formation of the radiative heat exchange channel 60, a second installation groove 2021 may be formed on the support member 202, and the bottom of the second installation groove 2021 extends towards the bottom of the first installation groove 2013; the radiative heat exchanger 10 is disposed in the second installation groove 2021 and encloses the radiative heat exchange channel 60 with the groove wall of the second installation groove 2021. In this way, not only can the appearance effect of the indoor unit 100 be improved, but also, by forming the second installation groove 2021, the flow path of the air flow in the radiative heat exchange channel 60 can be extended, so that the cold air can be heated in the radiative heat exchange channel 60 for a longer time, thereby making the heat exchange effect of the radiative heat exchanger 10 better, and further making the heating effect of the indoor unit 100 provided in this embodiment better.

[0096] Regarding the formation manner of the convection air inlet 503 and the convection air outlet 504, in this embodiment, one end of the first channel section 501 facing away from the second channel section 502 is formed as the convection air inlet 503, and one end of the second channel section 502 facing away from the first channel section 501 is formed as the convection air outlet 504; wherein, the convection air inlet 503 is located below the convection air outlet 504; the convection air inlet 503 is formed at the bottom of the housing assembly 20, and the convection air outlet 504 is formed on the blower housing 301, and the convection air outlet 504 is disposed towards the side away from the bottom wall of the first installation groove 2013, that is to say, in this embodiment, the convection air outlet 504 is disposed towards the front side of the indoor unit 100.

[0097] Wherein, the front-back direction of the indoor unit 100 may refer to Figure 6 the direction indicated by the arrow in

[0098] In this embodiment, the convection air inlet 503 includes an air inlet opening 5031 and a plurality of air inlet holes 5032; the air inlet opening 5031 is formed by enclosing the bottom end of the support member 202, the bottoms of the two side enclosing plates 2012c, and the bottom end enclosing plate 2012b, and the air inlet opening 5031 is disposed towards the front side of the indoor unit 100; the plurality of air inlet holes 5032 are spaced apart and opened on the bottom end enclosing plate 2012b, and each air inlet hole 5032 is disposed downward.

[0099] It should be noted that by forming the convection air inlet 503 in the form of combining the air inlet opening 5031 and the plurality of air inlet holes 5032, the opening area of the convection air inlet 503 can be increased, so that the air flow rate flowing through the convection air inlet 503 can be increased. In this way, the heat exchange performance of the convection heat exchanger 40 can be improved.

[0100] Such as Figure 7As shown, in this embodiment, the air inlet holes 5032 are rectangular holes, and a plurality of air inlet holes 5032 are arranged at intervals in the left-right direction of the indoor unit 100 on the bottom end enclosure 2012b.

[0101] Since the aperture of the air inlet holes 5032 is relatively large and the opening area of the air inlet opening 5031 is relatively large, therefore, external dust or particulate matter may enter the interior of the indoor unit 100 through the air inlet opening 5031 and the air inlet holes 5032. Thus, in some alternative embodiments, a grille 90 is connected to the bottom of the housing main body 201; one end of the grille 90 is connected to the bottom end of the support member 202, the other end of the grille 90 is connected to the bottom end enclosure 2012b, and the grille 90 covers the air inlet opening 5031 and a plurality of air inlet holes 5032. That is to say, a part of the structure of the grille 90 is located below the bottom end enclosure 2012b. In this way, through the arrangement of the grille 90, it is possible to prevent relatively large particulate matter or dust from flowing through the convective air inlet 503 and entering the interior of the indoor unit 100 to a certain extent. In this way, the indoor unit 100 can have better performance.

[0102] In order to introduce the structure of the grille 90 in detail, since there is a connection relationship between the grille 90 and the support member 202, therefore, here, the structure of the support member 202 in this embodiment will be introduced first, as Figure 7 As shown, in this embodiment, the support member 202 includes a support plate 2022 and a plurality of extension plates 2023 connected to the peripheral side of the support plate 2022. The plurality of extension plates 2023 and the support plate 2022 enclose a second installation groove 2021. The bottom end of the extension plate 2023 at the bottom forms a downwardly extending flange 2024 by bending, and one end of the grille 90 is detachably connected to the flange 2024.

[0103] Specifically, the grille 90 includes a first protection part 901 and a second protection part 902. The top end of the first protection part 901 is detachably connected to the flange 2024 by a threaded fastener, and the left and right sides of the first protection part 901 are respectively detachably connected to the two side enclosures 2012c by threaded fasteners. The first protection part 901 extends in the up-down direction of the indoor unit 100 and covers the air inlet opening 5031. The second protection part 902 is connected to the bottom end of the first protection part 901 and extends in the front-back direction of the indoor unit 100. The second protection part 902 covers a plurality of air inlet holes 5032, and the second protection part 902 is connected to the bottom end of the bottom end enclosure 2012b. Here, the connection method between the grille 90 and the housing main body 201 is not specifically limited.

[0104] By observing Figure 6, it is not difficult to see that the indoor unit 100 provided in this embodiment should stand upright on the ground, desktop, etc. in the use state. Therefore, on the one hand, in order to improve the stability of the indoor unit 100 during use, and on the other hand, in order to make the housing assembly 20 maintain a good appearance structure. In some alternative embodiments, two spaced-apart support portions 110 are provided at the bottom of the housing assembly 20. Specifically, the two support portions 110 are spaced apart along the left-right direction of the indoor unit 100. In this way, by providing the support portions 110, on the one hand, the stability of the indoor unit 100 during use is improved to avoid the phenomenon that the indoor unit 100 topples when subjected to certain external forces; on the other hand, it can to a certain extent prevent the bottom of the housing assembly 20 from being worn. In this way, the service life of the housing assembly 20 can be extended, and thus the service life of the indoor unit 100 provided in this embodiment can be extended.

[0105] In a specific embodiment of this embodiment, the two support portions 110 are connected to the left and right sides of the bottom end of the second protection portion 902.

[0106] In some specific embodiments, a weight-reducing groove 1101 with an opening downward is formed at the bottom of the support portion 110. By providing the weight-reducing groove 1101, on the one hand, the weight of the grille 90 can be reduced, and on the other hand, it is convenient to assemble between the grille 90 and the housing assembly 20.

[0107] Since the blower 302 and the convection heat exchanger 40 do not work when the indoor unit 100 is in the cooling mode and the convection heating mode, therefore, in the cooling mode and the convection heating mode, the convection exhaust port 504 does not need to be opened. That is to say, in these two modes, the convection exhaust port 504 can be in a closed state. In this way, it can to a certain extent prevent external dust, etc. from flowing into the interior of the indoor unit 100 through the convection exhaust port 504. Therefore, in this embodiment, the indoor unit 100 further includes a guiding member 120 rotatably connected to the blower housing 301. The guiding member 120 is disposed at the convection exhaust port 504 to open or close the convection exhaust port 504; when the indoor unit 100 is in the cooling mode and the convection heating mode, the convection exhaust port 504 is opened; when the indoor unit 100 is in the radiant heating mode, the convection exhaust port 504 is closed.

[0108] It should be noted that the guiding member 120 can be driven to rotate by a driving mechanism such as a motor to open or close the convection exhaust port 504. Here, the specific driving form of the guiding member 120 is not limited.

[0109] It can be understood that if a large amount of condensed water adheres to the surface of the convection heat exchanger 40, it will not only affect the heat exchange efficiency of the convection heat exchanger 40, but may also damage the surface structure of the convection heat exchanger 40. Therefore, in some alternative embodiments, in order to avoid, to a certain extent, a large amount of condensed water adhering to the surface of the convection heat exchanger 40, the condensed water flowing down from the convection heat exchanger 40 can be collected. Thus, the indoor unit 100 provided in this embodiment may further include a water receiving tray 150, which is disposed below the convection heat exchanger 40 and is connected to the housing assembly 20. In this way, through the arrangement of the water receiving tray 150, the condensed water adhering to the surface of the convection heat exchanger 40 can be collected, enabling the convection heat exchanger 40 to maintain good performance.

[0110] In addition, if the water receiving tray 150 is full of condensed water, it will overflow, and the overflowing condensed water may also damage other modules or components arranged in the installation cavity 203. Therefore, in order to avoid this phenomenon to a certain extent, the indoor unit 100 provided in this embodiment may further include a water pump (not shown in the figure) connected to the water receiving tray 150, and through the water pump, the water in the water receiving tray 150 can be pumped to the outside.

[0111] Please refer to Figures 10 to 12 This embodiment also provides a heating, ventilation and air conditioning (HVAC) device, including the indoor unit 100 in the above-mentioned embodiment and an outdoor unit 200. The outdoor unit 200 includes a compressor 2001 and an outdoor heat exchanger 2002 connected together. The compressor 2001, the outdoor heat exchanger 2002 and the indoor unit 100 are all connected through a piping assembly 130. In order to regulate the flow rate of the refrigerant, the indoor unit 100 may further include a throttle valve 140.

[0112] As Figure 10 shown, in the cooling mode, the flow direction of the refrigerant is: compressor 2001 → outdoor heat exchanger 2002 → throttle valve 140 → convection heat exchanger 40 → first regulating valve 70 → compressor 2001;

[0113] As Figure 11 shown, in the convection heating mode, the flow direction of the refrigerant is: compressor 2001 → first regulating valve 70 → convection heat exchanger 40 → throttle valve 140 → outdoor heat exchanger 2002 → compressor 2001;

[0114] As Figure 12 shown, in the radiant heating mode, the flow direction of the refrigerant is: compressor 2001 → second regulating valve 80 → radiant heat exchanger 10 → throttle valve 140 → outdoor heat exchanger 2002 → compressor 2001.

[0115] It should be noted that the HVAC device provided in this embodiment may further include other modules or components. Here, they will not be introduced one by one.

[0116] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural transformation made under the concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A radiation heat exchanger, characterized in that: include: A piping assembly for the flow of refrigerant; A fin assembly connected to one side of the pipe assembly; as well as, The radiation plate is connected to the other side of the pipe assembly, and the radiation plate has a radiation surface, and the radiation surface is arranged to face away from the fin assembly.

2. The radiation heat exchanger according to claim 1, characterized in that: The pipeline assembly includes a microchannel pipeline and two manifolds; The two manifolds are arranged at intervals, and the microchannel pipeline is connected between the two manifolds; The fin assembly is connected to the microchannel pipeline.

3. The radiation heat exchanger according to claim 2, characterized in that: The fin assembly includes a plurality of fin units arranged at intervals along the extension direction of the microchannel pipeline, and a flow channel is formed between two adjacent fin units; The flow channel extends in a height direction of the radiation heat exchanger.

4. The radiation heat exchanger according to claim 3, characterized in that: The sizes of the plurality of flow channels in the extending direction of the microchannel pipeline are equal.

5. The radiation heat exchanger according to claim 4, characterized in that The fin assembly includes a base plate and a plurality of protrusions formed on the base plate; A protrusion forms a fin unit, and the protrusion protrudes in a direction away from the radiation surface.

6. The radiation heat exchanger according to claim 5, characterized in that The protrusion includes a first heat exchange section, a second heat exchange section and a third heat exchange section; One end of the first heat exchange segment and one end of the second heat exchange segment are both connected to the substrate, the other end of the first heat exchange segment and the other end of the second heat exchange segment both extend toward a side away from the radiation surface and are connected to the third heat exchange segment, and the other end of the first heat exchange segment and the other end of the second heat exchange segment are located on the same plane.

7. The radiation heat exchanger according to claim 6, characterized in that The plurality of protrusions have the same shape and the same size; The dimension of the third heat exchange section in the extension direction of the microchannel pipeline is L1, the sum of the dimensions of the microchannel pipeline and the radiation plate in the thickness direction of the radiation plate is L2, and the distance between the third heat exchange section and the microchannel pipeline is L3; Among them, L1 is greater than L2, and L3 is greater than 1.5 times of L1.

8. The radiation heat exchanger according to claim 4, characterized in that: The fin assembly includes a plurality of fins arranged at intervals along the extension direction of the microchannel pipeline, and one fin forms one fin unit.

9. The radiation heat exchanger according to claim 8, characterized in that The plurality of fins have the same shape and are equal in size.

10. The radiation heat exchanger according to any one of claims 1 to 9, characterized in that The radiation plate has a mounting surface disposed opposite to the radiation surface; The projections of the pipe assembly and the fin assembly on the plane where the installation surface is located both fall within the installation surface.

11. An indoor unit, characterized in that: include: A housing assembly having a mounting cavity formed therein; A fan assembly is arranged in the installation cavity, the fan assembly comprises a fan casing and a fan connected together, the fan casing is connected with the housing assembly to enclose a convection heat exchange channel, and the fan is located in the convection heat exchange channel; A convection heat exchanger is disposed in the convection heat exchange channel and is arranged at intervals with the fan in the flow direction of the airflow; as well as The radiation heat exchanger described in any one of claims 1 to 10 is installed in the shell assembly and arranged in parallel with the convection heat exchanger. The radiation heat exchanger is located outside the installation cavity, and a radiation heat exchange channel is enclosed between the radiation heat exchanger and the shell assembly.

12. The indoor unit according to claim 11, characterized in that: The convection heat exchange channel has a convection air inlet and a convection air outlet, and the radiation heat exchange channel has a radiation air inlet and a radiation air outlet, and the radiation air inlet is located below the radiation air outlet; Wherein, the convection air inlet is arranged adjacent to the radiation air inlet.

13. The indoor unit according to claim 12, characterized in that: A filter is connected between the housing assembly and the radiation heat exchanger, and the filter is arranged at the radiation air inlet; The filter element is formed with a plurality of filter holes distributed at intervals.

14. A HVAC equipment, characterized in that: It comprises an outdoor unit and the indoor unit according to any one of claims 11 to 13.

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