A window-type fresh air unit with heat recovery

Abstract

The present invention discloses a window-type fresh air unit with heat recovery. It includes a shell and a heat exchange device, the heat exchange device includes two groups of heat pipes, two mounting plates, a plurality of heat-conducting blocks and a semiconductor thermopile, the two mounting plates are spaced to separate the two sides of the shell to form a fresh air channel and a return air channel, a fresh air fan is arranged in the fresh air channel, a return air fan is arranged in the return air channel, a plurality of through holes are arranged on the mounting plate, the two groups of heat pipes include a plurality of heat pipes respectively, the heat-conducting blocks are vertically arranged into two rows and arranged between the two mounting plates, the heat-conducting blocks are provided with a plurality of receiving grooves, the inner end portion of the heat pipe is arranged in the receiving groove, and the semiconductor thermopile is arranged between the two rows of heat-conducting blocks. The present invention exchanges heat through the improved heat exchange device, which can make the structure of the present invention simple and clear, small in size, high in efficiency, low in cost, and simple in maintenance; it effectively solves the problems of large size, low heat transfer efficiency, inconvenient maintenance, and need for replacement after long-term operation of the fresh air ventilation units in the current market.

Description

Technical Field

[0001] The invention relates to the field of window-type fresh air units with heat recovery, and in particular to a window-type fresh air unit with heat recovery. Background Art

[0002] As the country's requirements for energy conservation and emission reduction become increasingly higher, most of the household fresh air ventilation units on the market currently use ordinary plate-fin heat exchanger fresh air units, and some are centrally controlled combined air-conditioning units; the installation size of ordinary plate-fin heat exchanger fresh air units is not large, but generally requires ceiling installation, the initial investment is a bit large, and installation and maintenance are very troublesome; centralized combined air-conditioning units require unified management for control, are expensive, and have large sizes. They are not economical for single users or a small number of users, and are not the first choice for households. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an efficient household window-type fresh air ventilation unit with heat recovery, which can be more convenient to install and maintain, has a small size, and efficient energy exchange, thereby achieving the effect of energy saving and emission reduction of the fresh air ventilation unit.

[0004] To achieve the above-mentioned objectives, the present invention provides a window-type fresh air unit with heat recovery, including a shell and a heat exchange device, the heat exchange device including two groups of heat pipes, two mounting plates, a plurality of heat conductive blocks and a semiconductor thermopile, the two mounting plates are fixed at intervals on the inner side of the shell, and the two sides of the shell are spaced to form a fresh air channel and a return air channel, a fresh air fan is arranged in the fresh air channel, and fresh air inlets and air supply outlets are arranged on the shell at both ends, a return air fan is arranged in the return air channel, and return air inlets and exhaust outlets are arranged on the shell at both ends, a plurality of through holes are arranged on the mounting plate, the two groups of heat pipes respectively include a plurality of heat pipes, the heat conductive blocks are arranged in two rows and arranged between the two mounting plates, the heat conductive blocks are detachably fixedly connected, a plurality of accommodating grooves are respectively arranged on opposite sides of the two rows of heat conductive blocks, the inner ends of the heat pipes are respectively arranged in the accommodating grooves through the through holes, and the semiconductor thermopile is arranged between the two rows of heat conductive blocks.

[0005] Furthermore, air filters are provided between the fresh air inlet and the heat pipe and between the return air inlet and the heat pipe.

[0006] Furthermore, the air filter is a polyester fiber filter.

[0007] Furthermore, the heat pipes are arranged and distributed along the air flow direction, and guide plates are provided at intervals on both sides thereof. The guide plates are installed on the inner side of the shell, and a plurality of grooves are provided on the inner sides of the two guide plates respectively, and the heat pipes are arranged between the opposite grooves.

[0008] Furthermore, the grooves are in an arc shape, and each groove is arranged concentrically with the center of the circle of the heat pipe corresponding to it.

[0009] Furthermore, the fresh air fan and the return air fan are both cross-flow fans, the fresh air fan is arranged between the heat pipe and the air supply port, and the return air fan is arranged between the heat pipe and the air exhaust port.

[0010] Furthermore, the shell includes a shell base and a front panel detachably connected to the front side of the shell base, the fresh air inlet and the exhaust air outlet are both arranged on the rear side of the shell base, and the air supply inlet and the return air outlet are both arranged on the front panel.

[0011] Furthermore, the fresh air inlet and the exhaust outlet are both arranged at the lower rear part of the shell base, the supply air inlet and the return air inlet are both arranged at the upper part of the front panel, and the air filter, the heat pipe and the fresh air fan in the fresh air channel are arranged in sequence from bottom to top; the air filter, the heat pipe and the return air fan in the return air channel are arranged in sequence from top to bottom.

[0012] Furthermore, the heat conductive block is an aluminum block.

[0013] Furthermore, the through holes on the two mounting plates are arranged in non-same planes, so that the inner ends of the two groups of heat pipes are arranged in a staggered manner.

[0014] Beneficial effects: The present invention performs heat exchange through an improved heat exchange device, which can make the structure of the present invention simple and clear, small in size, high in efficiency, low in cost, and simple in maintenance; it effectively solves the problems of large size, low heat transfer efficiency, inconvenient maintenance, and the need for replacement after long-term operation of fresh air ventilation units in the current market. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural schematic diagram of a window-type fresh air unit with heat recovery according to an embodiment of the present invention;

[0016] Figure 2 is a side perspective view of a window-type fresh air unit with heat recovery according to an embodiment of the present invention;

[0017] Figure 3 1 is a top view schematic diagram of a window-type fresh air unit with heat recovery according to an embodiment of the present invention;

[0018] Figure 4 is a rear view schematic diagram of a housing seat according to an embodiment of the present invention;

[0019] Figure 5 is a front view schematic diagram of a front panel of an embodiment of the present invention;

[0020] Figure 6 is a schematic structural diagram of a heat exchange device according to an embodiment of the present invention;

[0021] Figure 7is a schematic structural diagram of a mounting plate according to an embodiment of the present invention;

[0022] Figure 8 is a schematic structural diagram of another mounting plate according to an embodiment of the present invention;

[0023] Fig. 9 is a schematic diagram of the structure of a heat conducting block according to an embodiment of the present invention;

[0024] Fig.10 It is a structural schematic diagram of a heat pipe air-conducting heat-exchanging structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0026] like Figures 1 to 9 As shown, an embodiment of the present invention provides a window-type fresh air unit with heat recovery, including a shell 1 and a heat exchange device 2. The heat exchange device 2 of the embodiment of the present invention includes two groups of heat pipes 21, two mounting plates 22, a plurality of heat-conducting blocks 23 and a semiconductor thermopile 24. The mounting plate 22 preferably adopts a PVC mounting plate, wherein the two mounting plates 22 are fixedly arranged on the inner side of the shell 1 at intervals, so that the two mounting plates 22 divide the interior of the shell 1 into three areas, and the two areas located on both sides are the fresh air channel 3 and the return air channel 4. A fresh air fan 5 is arranged in the fresh air channel 3, and a fresh air outlet 6 and an air supply outlet 7 are arranged on the shell at both ends of the fresh air channel 3, a return air fan 8 is arranged in the return air channel 4, and a return air outlet 9 and an exhaust outlet 10 are arranged on the shell 1 at both ends of the return air channel 4.

[0027] Combination Figures 6 to 9, a plurality of through holes 25 are provided on the mounting plate 22. In order to improve the heat exchange efficiency, it is preferred that the through holes 25 on the two mounting plates 22 are not arranged in the same plane, so that the inner ends of the heat pipes 21 in the fresh air channel 3 and the return air channel 4 are staggered after assembly and do not affect each other. The two groups of heat pipes 21 respectively include a plurality of pipes. The heat pipe 21 used in the embodiment of the present invention includes a pipe body 211. The pipe body 211 is preferably made of brass. The outside of the pipe body 211 located in the fresh air channel 3 and the return air channel 4 is provided with heat exchange fins 212. The heat exchange fins 212 are preferably spirally coiled and arranged on the outside of the pipe body 308. The inside of the pipe body 211 is provided with a working fluid, and the working fluid adopts the existing technology. The heat conducting blocks 23 are preferably aluminum blocks, and the heat conducting blocks 23 are arranged in parallel between the two mounting plates 22, and the heat conducting blocks 23 are arranged in two rows, each row is arranged with a plurality of blocks, and a plurality of receiving grooves 26 are respectively provided on the opposite sides of the two rows of heat conducting blocks 23, and the inner end of each heat pipe 21 passes through a through hole 25 on a mounting plate 22 and is arranged in the receiving groove 26. The outside of the heat pipe 21 is respectively arranged in the fresh air channel 3 and the return air channel 4, and the semiconductor thermopile 24 is in a flat plate shape and is arranged between the two rows of heat conducting blocks 23. The semiconductor thermopile 24 is powered on to work, thereby improving the heat conduction efficiency.

[0028] The heat conducting blocks 23 are fixedly connected in a detachable manner, preferably by bolts, and the semiconductor thermopile 24 and the heat pipe 21 are pressed between them. The number of heat conducting blocks 23 and the number of receiving slots 26 provided on each heat conducting block 23 can be changed according to the number of heat pipes 21 and actual needs. The number of heat pipes 21 in each group of heat pipes 21 is generally 2 to 8, which can be adjusted according to the heat exchange requirements, such as Figures 6 to 9 As shown, in the preferred embodiment shown, the number of heat pipes 21 in the fresh air channel 3 and the return air channel 4 is 4 respectively, the number of heat conductive blocks 23 is 4, and the number of receiving grooves 26 provided on each heat conductive block 23 is 2. In order to improve the heat conduction efficiency, heat conductive silicone grease is also provided between the heat pipe 21 and the heat conductive block 23.

[0029] In order to purify the air, air filters 11 are provided between the fresh air inlet 6 and the heat pipe 21 and between the return air inlet 9 and the heat pipe 21 . The air filter 11 is preferably a polyester fiber filter.

[0030] In order to improve the heat exchange efficiency, the heat pipes 21 are preferably arranged and distributed along the air flow direction, and guide plates 12 are respectively provided on both sides of the heat pipes 21. The guide plates 12 are installed on the inner side of the housing 1. The inner sides of the two guide plates 12 are spaced apart from the heat pipes 21. The inner sides of the two guide plates 12 are respectively provided with a plurality of grooves 13 opposite to each other, and each heat pipe 21 is arranged between the opposite grooves 13. The grooves 13 are preferably arranged in an arc shape, and the grooves 13 are arranged concentrically with the center of the heat pipe 21, so that the air ducts between the guide plates 12 and the heat pipes 21 are evenly spaced, and the air is guided between the heat pipes 21 to improve the heat exchange efficiency. The guide plates 12 are preferably made of PVC material for easy processing and manufacturing.

[0031] Both the fresh air fan 5 and the return air fan 8 are preferably cross-flow fans. The fresh air fan 5 is preferably arranged between the heat pipe 21 and the air supply port 7 , and the return air fan 8 is preferably arranged between the heat pipe 21 and the air exhaust port 10 .

[0032] The outer shell 1 includes a shell base 101 and a front panel 102 detachably connected to the front side of the shell base 101. Specifically, an opening is provided on the front side of the shell base 101, and the front panel 102 is detachably connected to the opening. The fresh air inlet 6 and the exhaust air outlet 10 are both arranged on the shell base 101, and the supply air outlet 7 and the return air outlet 9 are both arranged on the front panel 102.

[0033] In order to reduce the thickness of the fresh air unit and avoid resonance, the fresh air fan 5 and the return air fan 8 are preferably not arranged on the same horizontal plane. For example, the fresh air inlet 6 and the exhaust outlet 10 are preferably arranged at the lower part of the shell base 101, and the air supply outlet 7 and the return air outlet 9 are both arranged at the upper part of the front panel 102. The air filter 11, heat pipe 21 and fresh air fan 5 in the fresh air channel 3 are preferably arranged in sequence from bottom to top, and the air filter 11, heat pipe 21 and return air fan 8 in the return air channel 4 are arranged in sequence from top to bottom.

[0034] During operation, the outdoor fresh air with a higher temperature entering the fresh air passage 3 is filtered by the air filter 11, passes through the heat pipe 21 in the fresh air passage 3, and is then sent to the room by the fresh air blower 5. The indoor return air with a lower temperature entering the return air passage 4 is filtered by the air filter 11, passes through the heat pipe 21 in the return air passage 4, and is then discharged to the outside by the return air blower 8. In summer, the high temperature heat in the fresh air is transferred to the hot pole of the semiconductor thermopile 24 through the heat pipe 21, and the cold and hot electric potential generated by the P-N pole of the semiconductor thermopile 24 transfers the heat from the hot pole to the cold pole, and then from the cold pole to the heat pipe 21 in the return air passage 4, thereby cooling the fresh air. In winter, the high temperature heat in the return air is transferred to the hot pole of the semiconductor thermopile 24 through the heat pipe 21, and the cold and hot electric potential generated by the P-N pole of the semiconductor thermopile 24 transfers the heat from the hot pole to the cold pole, and then from the cold pole to the heat pipe 21 in the fresh air passage 3, thereby heating the fresh air. The semiconductor thermopile 24 works with an external power supply, increasing the hot and cold potential, thereby achieving the purpose of efficient heat transfer and hot and cold exchange. By changing the electrode connection of the external power supply, the hot pole and the cold pole can be switched, which is convenient for switching control in winter and summer.

[0035] like Fig.10 As shown, based on the above embodiments, those skilled in the art can understand that the present invention also provides a heat pipe air-conducting heat-exchanging structure, which includes a shell 301, an air duct 302 is arranged on the inner side of the shell 301, an air inlet 303 and an air outlet 304 are respectively arranged at both ends of the air duct 302, a plurality of heat pipes 305 are arranged in the air duct 302, the heat pipes 305 are arranged along the air flow direction in the air duct 302, guide plates 306 are respectively provided on both sides of the heat pipe 21, the guide plates 306 are installed on the inner side of the shell 301, the inner sides of the two guide plates 306 are spaced from the heat pipe 305, the inner sides of the two guide plates 306 are respectively provided with a plurality of grooves 307 opposite to each other, and each heat pipe 305 is arranged between the opposite grooves 307. The groove 307 is preferably arranged in an arc shape, and each groove 307 is arranged concentrically with the center of the heat pipe 305 corresponding thereto, so that the air duct between the guide plate 306 and the heat pipe 305 is evenly spaced, and the air is guided between the heat pipes 305 to improve the heat exchange efficiency. The guide plate 306 is preferably a guide plate made of PVC material, which is easy to process and manufacture. The heat pipe 305 includes a tube body 308, which is preferably made of brass. A heat exchange fin 309 is arranged on the outside of the tube body 308, and the heat exchange fin 309 is preferably spirally coiled on the outside of the tube body 308, and a working fluid is arranged inside the tube body 308.

[0036] The above is only a preferred embodiment of the present invention. It should be noted that for ordinary technicians in this technical field, other parts not specifically described belong to the prior art or common knowledge. Several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A window-type fresh air unit with heat recovery, comprising a housing and a heat exchange device, characterized in that: The heat exchange device comprises two groups of heat pipes, two mounting plates, a plurality of heat-conducting blocks and a semiconductor thermopile. The two mounting plates are fixed at intervals on the inner side of the shell, and the two sides of the shell are spaced to form a fresh air channel and a return air channel. A fresh air fan is arranged in the fresh air channel, and fresh air inlets and air supply inlets are arranged on the shells at both ends thereof. A return air fan is arranged in the return air channel, and return air inlets and air exhaust inlets are arranged on the shells at both ends thereof. A plurality of through holes are arranged on the mounting plates. The two groups of heat pipes respectively comprise a plurality of heat pipes. The heat-conducting blocks are arranged in two rows and arranged between the two mounting plates. The heat-conducting blocks are detachably fixedly connected. A plurality of accommodating grooves are respectively arranged on opposite sides of the two rows of heat-conducting blocks. The inner ends of the heat pipes are respectively arranged in the accommodating grooves through the through holes. The semiconductor thermopile is arranged between the two rows of heat-conducting blocks. Air filters are provided between the fresh air inlet and the heat pipe and between the return air inlet and the heat pipe; The heat pipes are arranged and distributed along the airflow direction, and guide plates are arranged at intervals on both sides thereof. The guide plates are installed on the inner side of the shell, and a plurality of grooves are arranged on the inner sides of the two guide plates respectively, and the heat pipes are arranged between the opposite grooves. The grooves are in an arc shape, and each groove is arranged concentrically with the center of the circle of the heat pipe corresponding to it.

2. The window-type fresh air unit with heat recovery according to claim 1, characterized in that: The air filter is a polyester fiber filter.

3. The window-type fresh air unit with heat recovery according to claim 1, characterized in that: The fresh air fan and the return air fan are both cross-flow fans. The fresh air fan is arranged between the heat pipe and the air supply port, and the return air fan is arranged between the heat pipe and the air exhaust port.

4. The window-type fresh air unit with heat recovery according to claim 1, characterized in that: The shell includes a shell base and a front panel detachably connected to the front side of the shell base, the fresh air inlet and the exhaust air outlet are both arranged on the rear side of the shell base, and the air supply inlet and the return air inlet are both arranged on the front panel.

5. The window-type fresh air unit with heat recovery according to claim 4, characterized in that: The fresh air inlet and the exhaust outlet are both arranged at the lower rear part of the shell base, the air supply inlet and the return air inlet are both arranged at the upper part of the front panel, the air filter, the heat pipe and the fresh air fan in the fresh air channel are arranged in sequence from bottom to top; the air filter, the heat pipe and the return air fan in the return air channel are arranged in sequence from top to bottom.

6. The window-type fresh air unit with heat recovery according to claim 4, characterized in that: The heat conducting block is an aluminum block.

7. The window-type fresh air unit with heat recovery according to claim 1, characterized in that: The through holes on the two mounting plates are arranged in non-same planes so that the inner ends of the two groups of heat pipes are arranged in a staggered manner.

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