Total heat exchanger

Abstract

The invention provides a total heat exchanger. The total heat exchanger comprises a machine shell, an exchange core, a first fan assembly and a second fan assembly. The machine shell comprises a box body and is provided with an outer air inlet, an outer air outlet, an inner air inlet and an inner air outlet. The exchange core is arranged in the box body and comprises a first air inlet face and a second air inlet face. The first fan assembly comprises a first centrifugal fan impeller, a first air guide partition plate and a first support, the first centrifugal fan impeller enables one axial end of the first centrifugal fan impeller to face the outer air inlet through the first support, and the other axial end of the first centrifugal fan impeller faces the first air inlet face. The second fan assembly comprises a second centrifugal fan impeller, a second air guide partition plate and a second support. The axial end of the second centrifugal fan impeller faces the inner air inlet through the second support, and the other end of the second centrifugal fan impeller faces the second air inlet face of the exchange core.

Description

Technical Field

[0001] The invention relates to a ventilation device, in particular to a total heat exchanger. Background Art

[0002] In existing two-way flow fresh air fans, the fan impeller axis is usually aligned with the center of the air outlet and kept parallel. In addition, since the diameter of the impeller has a direct impact on the delivery efficiency of fresh air and exhaust air, in order to improve the air supply efficiency, it is often necessary to use an impeller with a larger diameter.

[0003] However, as the impeller diameter increases, the size of the fan housing must also increase accordingly to provide sufficient airflow space and avoid the formation of turbulence. Therefore, the main unit of a two-way flow fresh air fan usually has the disadvantages of being large and bulky, which not only occupies a larger indoor space, but also makes installation difficult due to the increased weight.

[0004] In this regard, how to optimize the airflow path and increase the flow rate of outdoor air to increase the temperature and energy recovery efficiency, while at the same time having the characteristics of reducing volume and lightness to achieve the effect of facilitating transportation and installation, is the research motivation of the applicant.

[0005] In view of this, the applicant has conducted intensive research on the above-mentioned prior art and applied theoretical knowledge to try its best to solve the above-mentioned problems, which has become the goal of the applicant's improvement. Summary of the invention

[0006] An object of the present invention is to provide a total heat exchanger to optimize the airflow path and increase the flow rate of outdoor air, thereby improving the temperature and energy recovery efficiency.

[0007] An object of the present invention is to provide a thin total heat exchanger which is small in size, compact in structure, and lightweight, can meet the installation requirements of a narrow space, and is easy to transport and install.

[0008] In order to achieve the above-mentioned purpose, the present invention proposes a total heat exchanger, including a casing, an exchange core, a first fan assembly and a second fan assembly. The casing is composed of a box body and a cover plate covering the box body. One side of the box body is provided with an external air inlet and an external air outlet, and the other side opposite thereto is provided with an internal air inlet and an internal air outlet. The exchange core is arranged in the box body, and includes a first air inlet surface facing the external air inlet and a second air inlet surface facing the internal air inlet. The first fan assembly includes a first centrifugal fan impeller, a first air guide baffle and a first bracket. The first air guide baffle is enclosed between the external air inlet and the first centrifugal fan impeller. The first bracket supports and guides the first centrifugal fan impeller so that one axial end of the first centrifugal fan impeller faces the external air inlet and the other end faces the first air inlet surface of the exchange core. The second fan assembly includes a second centrifugal fan impeller, a second air guide baffle and a second bracket. The second air guide baffle is enclosed between the inner air inlet and the second centrifugal fan impeller, and the second bracket supports and guides the second centrifugal fan impeller, so that one axial end of the second centrifugal fan impeller faces the inner air inlet and the other end faces the second air inlet surface of the exchange core. Outdoor air flows from the outer air inlet through the first air guide baffle, enters the exchange core through the first centrifugal fan impeller and flows out from the inner air outlet; indoor air flows from the inner air inlet through the second air guide baffle, enters the exchange core through the second centrifugal fan impeller and flows out from the outer air outlet.

[0009] In order to achieve the above-mentioned purpose, the present invention proposes a total heat exchanger, including a casing, an exchange core, a first fan assembly and a second fan assembly. The casing is composed of a box body and a cover plate covering the box body, the box body includes a plurality of partitions, and an external air inlet and an external air outlet are arranged on one side of the box body, and an internal air inlet and an internal air outlet are arranged on the other opposite side. The exchange core is arranged in the box body, including a first air inlet surface facing the external air inlet, a second air inlet surface facing the internal air inlet, a first air outlet surface relative to the first air inlet surface, and a second air outlet surface relative to the second air inlet surface, wherein the partitions of the box body and the exchange core divide the interior of the box body into a first space, a second space, a third space and a fourth space, the first space is defined as the space between the external air inlet and the exchange core, the second space is defined as the space between the external air outlet and the exchange core, the third space is defined as the space between the internal air outlet and the exchange core, and the fourth space is defined as the space between the internal air inlet and the exchange core. The air valve is arranged between the first space and the second space. The first fan assembly is arranged in the first space, and the first fan assembly includes a first centrifugal fan impeller. The second fan assembly is arranged in the third space, and the second fan assembly includes a second centrifugal fan impeller. Indoor air flows into the casing from the inner air inlet, enters the second centrifugal fan impeller, enters the exchange core from the second air inlet surface, flows out of the exchange core from the second air outlet surface and enters the second space, enters the first space through the air valve, enters the exchange core again from the first air inlet surface, flows out of the exchange core from the first air outlet surface, and flows out from the inner air outlet.

[0010] In order to achieve the above-mentioned purpose, the present invention proposes a total heat exchanger, including a casing, an exchange core, a first fan assembly and a second fan assembly. The casing is composed of a box body and a cover plate covering the box body, the box body includes a plurality of partitions, and an external air inlet and an external air outlet are arranged on one side of the box body, and an internal air inlet and an internal air outlet are arranged on the other opposite side. The exchange core is arranged in the box body, including a first air inlet surface facing the external air inlet, a second air inlet surface facing the internal air inlet, a first air outlet surface relative to the first air inlet surface, and a second air outlet surface relative to the second air inlet surface, wherein the partitions of the box body and the exchange core divide the interior of the box body into a first space, a second space, a third space and a fourth space, wherein the first space is defined as the space between the external air inlet and the exchange core, the second space is defined as the space between the external air outlet and the exchange core, the third space is defined as the space between the internal air outlet and the exchange core, and the fourth space is defined as the space between the internal air inlet and the exchange core. The air valve is arranged between the first space and the second space. The first fan assembly is arranged in the first space, and includes a first centrifugal fan impeller, a first air guide baffle and a first bracket, wherein the first air guide baffle is enclosed between the outer air inlet and the first centrifugal fan impeller, and the first bracket supports and guides the first centrifugal fan impeller, so that one axial end of the first centrifugal fan impeller faces the outer air inlet, and the other end faces the first air inlet surface of the exchange core. The second fan assembly is arranged in the third space, and includes a second centrifugal fan impeller, a second air guide baffle and a second bracket, wherein the second air guide baffle is enclosed between the inner air inlet and the second centrifugal fan impeller, and the second bracket supports and guides the second centrifugal fan impeller, so that one axial end of the second centrifugal fan impeller faces the inner air inlet, and the other end faces the second air inlet surface of the exchange core. Outdoor air flows from the outer air inlet through the first air guide baffle, enters the exchange core through the first centrifugal fan impeller and flows out from the inner air outlet, and indoor air flows from the inner air inlet through the second air guide baffle, enters the exchange core through the second centrifugal fan impeller and flows out from the outer air outlet; indoor air flows into the casing from the inner air inlet, enters the second centrifugal fan impeller, enters the exchange core from the second air inlet surface, flows out of the exchange core from the second air outlet surface and enters the second space, and enters the first space through the air valve, enters the exchange core again from the first air inlet surface, flows out of the exchange core from the first air outlet surface, and flows out from the inner air outlet.

[0011] In one embodiment of the present invention, the first centrifugal impeller and the second centrifugal impeller are centrifugal impellers without a volute.

[0012] In one embodiment of the present invention, the casing is provided with a first electric valve at the external air inlet for controlling the opening and closing of the external air inlet, and is provided with a second electric valve at the external air outlet for controlling the opening and closing of the external air outlet.

[0013] In one embodiment of the present invention, the box body includes a plurality of partitions, and the partitions and the exchange core divide the interior of the box body into a first space, a second space, a third space and a fourth space. The first space is defined as the space between the external air inlet and the exchange core, the second space is defined as the space between the external air outlet and the exchange core, the third space is defined as the space between the internal air outlet and the exchange core, and the fourth space is defined as the space between the internal air inlet and the exchange core. The first fan assembly is arranged in the first space, and the second fan assembly is arranged in the third space.

[0014] In one embodiment of the present invention, the box has a center line, the exchange core has a diagonal line, and the exchange core is installed in the box in a manner that the diagonal line and the center line are at a center offset angle.

[0015] In one embodiment of the present invention, the first bracket is arranged between the external air inlet and the exchange core and includes a first support member and a first bottom plate. The first centrifugal fan impeller is arranged on the first support member and includes a first motor. The first support member is attached to the bottom of the first motor. The first bottom plate has a first trailing edge. The position of the first trailing edge forms a first angle with the X-axis, so that the first trailing edge is facing the first air inlet surface of the exchange core; the second bracket is arranged between the internal air inlet and the exchange core and includes a second support member and a second bottom plate. The second centrifugal fan impeller is arranged on the second support member and includes a second motor. The second support member is attached to the bottom of the second motor. The second bottom plate has a second trailing edge. The position of the second trailing edge forms a second angle with the X-axis, so that the second trailing edge is facing the second air inlet surface of the exchange core.

[0016] In one embodiment of the present invention, the first centrifugal fan impeller further includes a first impeller driven by the first motor, the first impeller has a first outer diameter, the first support member has a plate width, and the plate width is not greater than the first outer diameter.

[0017] In one embodiment of the present invention, the first centrifugal fan impeller is supported by a first bracket and rotates in a first rotation axis direction, the first support member has a first normal direction, the first normal direction is parallel to the first rotation axis direction, and has a first offset angle relative to the Z axis; the second centrifugal fan impeller is supported by a second bracket and rotates in a second rotation axis direction, the second support member has a second normal direction, the second normal direction is parallel to the second rotation axis direction, and has a second offset angle relative to the Z axis.

[0018] Compared with the known, the first fan assembly of the present invention is oriented toward the external air inlet through the arrangement of the first bracket, so as to increase the air flow space between the first fan assembly and the shell, thereby optimizing the air inlet of the external air, so as to facilitate the external air to flow into the body more smoothly, thereby improving the efficiency of the supplementary gas flowing into the room; in addition, the second fan assembly of the present invention is oriented toward the internal air inlet through the arrangement of the second bracket, so as to increase the air flow space between the second fan assembly and the shell, thereby optimizing the air inlet of the internal air, so as to facilitate the internal air to flow out of the body more smoothly, thereby improving the exhaust gas efficiency flowing out of the room, thereby improving the overall working efficiency of the total heat exchanger. In addition, since the total heat exchanger of the present invention can optimize the air flow path, improve the fresh air / exhaust air delivery efficiency, and thus improve the temperature / energy exchange efficiency, it can achieve the effects of small size, thinness and compact structure, thereby achieving a lightweight design that is easy to carry and install, and meets the installation requirements of a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the total heat exchanger of the present invention.

[0020] Figure 2 It is a combined cross-sectional view of the total heat exchanger of the present invention.

[0021] Figure 3 It is a partial three-dimensional appearance schematic diagram of the first fan assembly of the present invention.

[0022] Figure 4 It is a plan view of the rear side of the first fan assembly of the present invention.

[0023] Figure 5 It is a cross-sectional view of the other side of the total heat exchanger of the present invention.

[0024] Figure 6 for Figure 5 Enlarged schematic diagram of part A.

[0025] Figure 7 for Figure 5 Schematic diagram of the enlarged portion B.

[0026] Figure 8 It is a cross-sectional view of the total heat exchanger of the present invention.

[0027] Fig. 9 It is a cross-sectional view of the other side of the total heat exchanger of the present invention.

[0028] Fig.10 This is another embodiment of the first fan assembly and the second fan assembly of the present invention.

[0029] Fig.11 It is a schematic diagram of the bidirectional ventilation of the total heat exchanger of the present invention.

[0030] Fig.12 It is a schematic diagram of the indoor defrosting state of the total heat exchanger of the present invention.

[0031] The reference numerals are as follows:

[0032] 1: Full heat exchanger

[0033] 10: Casing

[0034] 100: Centerline

[0035] 101: External air inlet

[0036] 102: Outlet vent

[0037] 103: Inner air inlet

[0038] 104: Inner air outlet

[0039] 11: Cabinet

[0040] 110: Partition

[0041] 111: First Space

[0042] 112: Second Space

[0043] 113: The Third Space

[0044] 114: The Fourth Space

[0045] 12: Cover

[0046] 13: Air valve

[0047] 14: First electric valve

[0048] 15: Second electric valve

[0049] 20: Exchange core

[0050] 200: Diagonal

[0051] 21: First windward side

[0052] 22: Second windward side

[0053] 23: First air outlet

[0054] 24: Second air outlet

[0055] 30: First fan assembly

[0056] 301: First fan inlet

[0057] 302: First fan outlet

[0058] 31: First centrifugal fan impeller

[0059] 310: First axis direction

[0060] 311: First Motor

[0061] 312: First impeller

[0062] 313: First outer diameter

[0063] 32: First air guide baffle

[0064] 33: First bracket

[0065] 330: First normal direction

[0066] 331: First support member

[0067] 332: First base plate

[0068] 3321: First trailing edge

[0069] 40: Second fan assembly

[0070] 401: Second fan inlet

[0071] 402: Second fan outlet

[0072] 41: Second centrifugal impeller

[0073] 410: Second axis direction

[0074] 42: Second air guide baffle

[0075] 43: Second bracket

[0076] 430: Second normal direction

[0077] 431: Second support member

[0078] 432: Second base plate

[0079] 4321: Second trailing edge

[0080] W1: Plate width

[0081] W2: Impeller outer diameter

[0082] A: First offset angle

[0083] B: Second offset angle

[0084] C: Center offset angle

[0085] D: First angle

[0086] E: Second angle

[0087] OS: outdoor side

[0088] IS: Indoor side

[0089] OA: Outside Air

[0090] SA: Supply Air

[0091] RA: Indoor Air

[0092] EA: Exhaust Air DETAILED DESCRIPTION

[0093] The detailed description and technical contents of the present invention are described as follows with reference to the accompanying drawings. However, the accompanying drawings are only provided for reference and description and are not intended to limit the present invention.

[0094] Please refer to Figure 1 , which is a three-dimensional appearance schematic diagram of the total heat exchanger of the present invention. The present invention is a total heat exchanger 1, comprising a housing 10, an exchange core 20, a first fan assembly 30 and a second fan assembly 40. The exchange core 20, the first fan assembly 30 and the second fan assembly 40 are arranged in the housing 10, and the first fan assembly 30 and the second fan assembly 40 are respectively located on two adjacent side surfaces of the exchange core 20.

[0095] The housing 10 is composed of a box body 11 and a cover plate 12 covering the box body 11. An outside air inlet 101 (OA inlet) and an exhaust air outlet 102 (EA outlet) are provided on one side of the box body 11, and an inner air inlet 103 (RA inlet) and an inner air outlet 104 (SA outlet) are provided on the other side of the box body 11. In addition, an air valve 13 is provided between the outside air inlet 101 and the exhaust air outlet 102.

[0096] The exchange core 20 is installed in the box body 11. The exchange core 20 has a first air inlet surface 21 facing the outer air inlet 101, a second air inlet surface 22 facing the inner air inlet 103, a first air outlet surface 23 relative to the first air inlet surface 21, and a second air outlet surface 24 relative to the second air inlet surface 22. In addition, the first fan assembly 30 is arranged between the outer air inlet 101 and the first air inlet surface 21. The second fan assembly 40 is arranged between the inner air outlet 104 and the second air inlet surface 22.

[0097] Please refer to Figure 2, which is a combined cross-sectional view of the total heat exchanger of the present invention. The first fan assembly 30 of the present invention includes a first centrifugal fan impeller 31 (first open blower) without a volute and a first air guide baffle 32. The first centrifugal fan impeller 31 has a first fan inlet 301 and a first fan outlet 302 that are relatively arranged. The first fan inlet 301 faces the external air inlet 101, and the first fan outlet 302 is arranged toward the first air inlet surface 21 of the exchange core 20. In addition, the first air guide baffle 32 is enclosed between the external air inlet 101 and the first centrifugal fan impeller 31, so that the airflow flowing in through the external air inlet 101 will pass through the first fan inlet 301 and flow out from the first fan outlet 302 of the first centrifugal fan impeller 31.

[0098] Continued reference Figure 2 The second fan assembly 40 includes a second centrifugal fan impeller 41 (second open blower) without a volute and a second air guide baffle 42. The second centrifugal fan impeller 41 has a second fan inlet 401 and a second fan outlet 402 that are arranged opposite to each other. The second fan inlet 401 faces the inner air inlet 103, and the second fan outlet 402 is arranged toward the second air inlet surface 22 of the exchange core 20. In addition, the second air guide baffle 42 is enclosed between the inner air inlet 103 and the second centrifugal fan impeller 41, so that the airflow flowing in through the inner air inlet 103 will pass through the second fan inlet 401 and flow out from the second fan outlet 402 of the second centrifugal fan impeller 41.

[0099] In this embodiment, the housing 10 is provided with a first electric valve (damper) 14 at the external air inlet 101 for electrically controlling the opening and closing of the external air inlet 101. In addition, the housing 10 is also provided with a second electric valve (damper) 15 at the external air outlet 102 for electrically controlling the opening and closing of the external air outlet 102.

[0100] Specifically, the housing 11 includes a plurality of partitions 110. The partitions 110 and the exchange core 20 are used to divide the interior of the housing 11 into a first space 111, a second space 112, a third space 113 and a fourth space 114. The first space 111 is defined as the space between the external air inlet 101 and the exchange core 20. The second space 112 is defined as the space between the external air outlet 102 and the exchange core 20. The third space 113 is defined as the space between the internal air outlet 104 and the exchange core 20. The fourth space 114 is defined as the space between the internal air outlet 104 and the exchange core 20. The first fan assembly 30 is disposed in the first space 111. The second fan assembly 40 is disposed in the third space 113. The air valve 13 is disposed between the first space 111 and the second space 112. In addition, the airflow flowing out of the first fan outlet 302 of the first centrifugal fan impeller 31 will enter the first space 111. The airflow flowing out of the second fan outlet 402 of the second centrifugal fan impeller 41 will enter the third space 113.

[0101] Please refer to Figure 3 , is a partial three-dimensional appearance schematic diagram of the first fan assembly of the present invention. The first fan assembly 30 of the present invention is disposed in the housing 11 and is located in the first space 111. The first fan assembly 30 includes a first centrifugal fan impeller 31, a first air guide baffle 32 and a first bracket 33. The first centrifugal fan impeller 31 includes a first motor 311 and a first impeller 312 driven by the first motor 311, and the first impeller 312 has a first outer diameter 313. The first air guide baffle 32 is disposed between the external air inlet 101 and the first centrifugal fan impeller 31. The first bracket 33 supports the first centrifugal fan impeller 31. The first bracket 33 includes a first support member 331 and a first bottom plate 332 connected to the first support member 331. The first support member 331 is used to support the first motor 311, and the first bottom plate 332 is connected to the housing 11. As shown Figure 3 As shown, the first bracket 33 can be a one-piece metal sheet, and the bending angle between the first support member 331 and the first bottom plate 332 is an acute angle θ.

[0102] Please refer to Figure 4 , is a plan view of the rear side of the first fan assembly of the present invention. The first support member 331 has a plate width W1. In addition, the first outer diameter 313 has a width W2. In actual use, the plate width W1 is not greater than the width W2 of the first outer diameter 313 to prevent the airflow generated by the operation of the first centrifugal fan impeller 31 from being affected by the first support member 331.

[0103] Please refer to Figure 5 , which is a cross-sectional view of the other side of the total heat exchanger of the present invention. Figure 3 , the first fan assembly 30 of the present invention is arranged in the first space 111. The first centrifugal fan impeller 31 has a first rotation axis direction 310. The first bracket 33 supports the first centrifugal fan impeller 31 so that the first centrifugal fan impeller 31 is installed in the first space 111 and fixed on the first support member 331. The first centrifugal fan impeller 31 rotates along the first rotation axis direction 310. In addition, the first fan inlet 301 of the first centrifugal fan impeller 31 is guided by the first support member 331 of the first bracket 33 toward the external air inlet 101. The first centrifugal fan impeller 31 is arranged so that its first rotation axis direction 310 has a first offset angle A relative to the Z axis, and this first offset angle A is equal to the bending angle θ between the aforementioned first support member 331 and the first bottom plate 332. The external air entering from the external air inlet 101 will be guided by the first air guide baffle 32 and flow into the first centrifugal fan impeller 31 and enter the exchange core 20.

[0104] In addition, the second fan assembly 40 is arranged in the third space 113. The second centrifugal fan impeller 41 has a second rotation axis direction 410. The second bracket 43 supports the second centrifugal fan impeller 41 so that the second centrifugal fan impeller 41 is installed in the third space 113. The second centrifugal fan impeller 41 rotates along the second rotation axis direction 410. The second bracket 43 includes a second support member 431 and a second base plate 432. The second centrifugal fan impeller 41 is fixed on the second support member 431. In addition, the second fan inlet 401 of the second centrifugal fan impeller 41 is directed toward the inner air inlet 103 through the arrangement of the second support member 431 of the second bracket 43. The second centrifugal fan impeller 41 is arranged so that its second rotation axis direction 410 has a second offset angle B relative to the Z axis. This second offset angle B is equal to the bending angle between the second support member 431 and the second base plate 432. It is worth noting that the internal air entering from the internal air inlet 103 will be guided by the second air guide baffle 42 to flow into the second centrifugal fan impeller 41 and enter the exchange core 20 .

[0105] Please refer to Figure 6 ,for Figure 5 An enlarged schematic diagram of part A in the figure. The first fan assembly 30 of the present invention is arranged in such a way that the first bracket 33 is fixed in the first space 111, and the first support member 331 supports the first centrifugal fan impeller 31 obliquely at a bending angle θ relative to the first base plate 332. Specifically, the first centrifugal fan impeller 31 has a first rotation axis direction 310. In addition, the first support member 331 has a first normal direction 330, and the first normal direction 330 is parallel to the first rotation axis direction 310. The first normal direction 330 is set to have a first offset angle A relative to the Z axis. Since the first offset angle A is equal to the bending angle θ, the first support member 331 supports the first centrifugal fan impeller 31 obliquely at the first offset angle A relative to the first base plate 332.

[0106] Please refer to Figure 7 ,for Figure 5 An enlarged schematic diagram of part B in the figure. The second fan assembly 40 of the present invention is arranged in such a way that the second bracket 43 is fixed in the third space 113, and the second support member 431 supports the second centrifugal fan impeller 41 at an angle of bending θ relative to the second base plate 432. Specifically, the second centrifugal fan impeller 41 has a second rotation axis direction 410. In addition, the second support member 431 has a second normal direction 430, and the second normal direction 430 is parallel to the second rotation axis direction 410. The second normal direction 430 is set to have a second offset angle B relative to the Z axis. That is to say, the second support member 431 supports the second centrifugal fan impeller 41 at an angle relative to the second base plate 432.

[0107] Please refer to Figure 8, is a cross-sectional view of the total heat exchanger of the present invention. The housing 11 of the present invention has a center line 100, and the exchange core 20 has a diagonal line 200. In addition, the exchange core 20 is installed in the housing 11 in such a manner that the diagonal line 200 and the center line 100 of the housing 11 are offset at a center angle C.

[0108] In more detail, the first bracket 33 of the present invention is arranged between the outer air inlet 101 and the exchange core 20. The first bottom plate 332 of the first bracket 33 has a first rear edge 3321. In addition, the position of the first rear edge 3321 forms a first angle D with the X-axis, so that the first rear edge 3321 faces the first air inlet surface 21 of the exchange core 20. In addition, the second bracket 43 is arranged between the inner air inlet 103 and the exchange core 20. The second bracket 43 has a second bottom plate 432, and the second bottom plate 432 has a second rear edge 4321. In addition, the position of the second rear edge 4321 forms a second angle E with the X-axis, so that the second rear edge 4321 faces the second air inlet surface 22 of the exchange core 20.

[0109] Please refer to Fig. 9 , which is a cross-sectional view of the other side of the total heat exchanger of the present invention. The first fan assembly 30 of the present invention is installed on one side of the external air inlet 101 to guide the airflow flowing in from the external air inlet 101. The installation direction of the first centrifugal fan impeller 31 is set by the first bracket 33. In addition, the second fan assembly 40 is installed on one side of the internal air inlet 103 to guide the airflow flowing in from the internal air inlet 103. The installation direction of the second centrifugal fan impeller 41 is set by the second bracket 43. In this embodiment, the first bracket 33 and the second bracket 43 are fixed on the same side of the shell 10. In addition, the air inlet directions of the first centrifugal fan impeller 31 and the second centrifugal fan impeller 41 are located on the same side.

[0110] Please refer to Fig.10 , is another embodiment of the first fan assembly and the second fan assembly of the present invention. Fig. 9 , the difference lies in the installation direction of the first centrifugal fan impeller 31 and the second centrifugal fan impeller 41. The first fan assembly 30 is used to guide the airflow flowing in from the external air inlet 101. The second fan assembly 40 is used to guide the airflow flowing in from the internal air inlet 103. In this embodiment, the first bracket 33 and the second bracket 43 are fixed on opposite sides of the shell 10. In addition, in the shell 10, the air inlet directions of the first centrifugal fan impeller 31 and the second centrifugal fan impeller 41 are located on opposite sides. It is worth noting that the opening position of the external air inlet 101 is defined with the installation of the first fan assembly 30. In addition, the opening position of the internal air inlet 103 is defined according to the installation of the second fan assembly 40.

[0111] Please continue to refer to Fig.11, is a schematic diagram of the two-way ventilation of the total heat exchanger of the present invention. The total heat exchanger 1 of the present invention is arranged between an outdoor side (Outdoor side, OS) and an indoor side (Indoor side, IS). When the total heat exchanger 1 of the present invention performs ventilation operation, the air valve 13 is set to be closed (OFF) so that the first space 111 and the second space 112 are not connected. In addition, the first electric valve 14 and the second electric valve 15 are in the open state (ON), and the first electric valve 14 and the second electric valve 15 are both driven by a stepper motor. In addition, the first centrifugal fan impeller 31 and the second centrifugal fan impeller 41 are set to be open (ON).

[0112] The total heat exchanger 1 of the present invention has a first ventilation direction when in operation. The first ventilation direction is defined as an outside air OA (Out air) on the outdoor side OS flowing into the housing 10 from the outside air inlet 101, and guided by the first air guide baffle 32 to enter the first centrifugal fan impeller 31, and then enter the exchange core 20 from the first air inlet surface 21. Subsequently, the outside air OA will flow out of the exchange core 20 from the first air outlet surface 23, and then flow into the indoor side IS from the inner air outlet 104, forming a supply air SA (Supply air).

[0113] Furthermore, the total heat exchanger 1 of the present invention has a second ventilation direction when in operation. The second ventilation direction is defined as the indoor air RA (return air) flowing into the housing 11 from the inner air inlet 103, and guided by the second air guide baffle 42 to enter the second centrifugal fan impeller 41, and then enter the exchange core 20 from the second air inlet surface 22. Subsequently, the indoor air RA will flow out of the exchange core 20 from the second air outlet surface 24, and then flow out from the outer air outlet 102 to the outdoor side OS, forming an exhaust air EA (exhaust air).

[0114] Please continue to refer to Fig.12 , which is a schematic diagram of the indoor defrosting state of the total heat exchanger of the present invention. The total heat exchanger 1 of the present invention can also perform a defrosting operation. As mentioned above, the total heat exchanger 1 is arranged between the outdoor side OS and the indoor side IS. When the total heat exchanger 1 performs a defrosting operation, the air valve 13 is set to open (ON) so that the first space 111 and the second space 112 are in a connected state. In addition, the first electric valve 14 and the second electric valve 15 are both in a closed state (OFF). In addition, the first centrifugal fan impeller 31 is set to be closed (OFF), and the second centrifugal fan impeller 41 is set to be open (ON).

[0115] Accordingly, the indoor air RA (return air) flows into the housing 11 from the inner air inlet 103, and is guided by the second air guide baffle 42 to enter the second centrifugal fan impeller 41, and then enters the exchange core 20 from the second air inlet surface 22. Subsequently, the indoor air RA will flow out of the exchange core 20 from the second air outlet surface 24 and enter the second space 112, then pass through the air valve 13 and enter the first space 111, and enter the exchange core 20 again from the first air inlet surface 21, and after flowing out of the exchange core 20 from the first air outlet surface 23, it flows into the indoor side IS from the inner air outlet 104.

[0116] In summary, the total heat exchanger of the present invention has two ventilation directions, which can optimize the airflow path and increase the flow rate of outdoor air, thereby improving the temperature and energy recovery efficiency; in addition, the total heat exchanger of the present invention is a thin ventilation device with a small size and a compact structure, so it has the characteristics of lightweight, meets the installation requirements of a small space, and is easy to transport and install.

[0117] The above description is only a preferred embodiment of the present invention and is not intended to define the patent scope of the present invention. Other equivalent changes that apply the patent spirit of the present invention should all fall within the patent scope of the present invention.

Claims

1. A total heat exchanger, comprising: A housing, comprising a box body and a cover plate covering the box body, wherein one side of the box body is provided with an external air inlet and an external air outlet, and the other side opposite thereto is provided with an internal air inlet and an internal air outlet; and An exchange core is disposed in the box body and includes a first air inlet surface facing the outer air inlet and a second air inlet surface facing the inner air inlet; a first fan assembly, comprising a first centrifugal fan impeller, a first air guide baffle and a first bracket, wherein the first air guide baffle is enclosed between the outer air inlet and the first centrifugal fan impeller, and the first bracket supports and guides the first centrifugal fan impeller so that one axial end of the first centrifugal fan impeller faces the outer air inlet and the other end faces the first air inlet surface of the exchange core; and a second fan assembly, comprising a second centrifugal fan impeller, a second air guide baffle and a second bracket, wherein the second air guide baffle is enclosed between the inner air inlet and the second centrifugal fan impeller, and the second bracket supports and guides the second centrifugal fan impeller so that one axial end of the second centrifugal fan impeller faces the inner air inlet and the other end faces the second air inlet surface of the exchange core; Among them, outdoor air flows from the external air inlet through the first air guide baffle, enters the exchange core through the first centrifugal fan impeller and flows out from the internal air outlet, and indoor air flows from the internal air inlet through the second air guide baffle, enters the exchange core through the second centrifugal fan impeller and flows out from the external air outlet.

2. The total heat exchanger as claimed in claim 1, wherein the first centrifugal impeller and the second centrifugal impeller are respectively centrifugal impellers without a volute.

3. A total heat exchanger as described in claim 1, wherein the casing is provided with a first electric valve at the external air inlet for controlling the opening and closing of the external air inlet, and a second electric valve at the external air outlet for controlling the opening and closing of the external air outlet.

4. A total heat exchanger as described in claim 1, wherein the box body includes a plurality of partitions, and the plurality of partitions and the exchange core divide the interior of the box body into a first space, a second space, a third space and a fourth space, the first space is defined as the space between the external air inlet and the exchange core, the second space is defined as the space between the external air outlet and the exchange core, the third space is defined as the space between the internal air outlet and the exchange core, the fourth space is defined as the space between the internal air inlet and the exchange core, the first fan assembly is arranged in the first space, and the second fan assembly is arranged in the third space.

5. The total heat exchanger as claimed in claim 1, wherein the housing has a center line, the exchange core has a diagonal line, and the exchange core is installed in the housing in such a manner that the diagonal line and the center line are at a center offset angle.

6. The total heat exchanger as claimed in claim 1, wherein the first bracket is arranged between the external air inlet and the exchange core, and comprises a first support member and a first bottom plate, the first centrifugal fan impeller is arranged on the first support member, and comprises a first motor, the first support member is attached to the bottom of the first motor, the first bottom plate has a first rear edge, the position of the first rear edge forms a first angle with the X-axis, so that the first rear edge frame faces the first air inlet surface of the exchange core; and The second bracket is arranged between the inner air inlet and the exchange core and includes a second support member and a second bottom plate. The second centrifugal fan impeller is arranged on the second support member and includes a second motor. The second support member is attached to the bottom of the second motor. The second bottom plate has a second trailing edge. The position of the second trailing edge forms a second angle with the X-axis, so that the second trailing edge faces the second air inlet surface of the exchange core.

7. A total heat exchanger as described in claim 6, wherein the first centrifugal fan impeller also includes a first impeller driven by the first motor, the first impeller has a first outer diameter, and the first support member has a plate width, and the size of the plate width is not greater than the first outer diameter.

8. The total heat exchanger as claimed in claim 6, wherein the first centrifugal impeller is supported by the first bracket and rotates in a first rotation axis direction, the first support member has a first normal direction, the first normal direction is parallel to the first rotation axis direction, and has a first offset angle relative to the Z axis; and The second centrifugal impeller is supported by the second bracket and rotates in a second rotation axis direction. The second support member has a second normal direction, which is parallel to the second rotation axis direction and has a second offset angle relative to the Z axis.

9. A total heat exchanger, comprising: A housing, comprising a box body and a cover plate covering the box body, the box body comprising a plurality of partitions, and an outer air inlet and an outer air outlet are arranged on one side of the box body, and an inner air inlet and an inner air outlet are arranged on the other side opposite thereto; and an exchange core, arranged in the box, comprising a first air inlet surface facing the outer air inlet, a second air inlet surface facing the inner air inlet, a first air outlet surface relative to the first air inlet surface, and a second air outlet surface relative to the second air inlet surface, wherein the partition of the box and the exchange core divide the interior of the box into a first space, a second space, a third space, and a fourth space, the first space is defined as the space between the outer air inlet and the exchange core, the second space is defined as the space between the outer air inlet and the exchange core, the third space is defined as the space between the inner air outlet and the exchange core, and the fourth space is defined as the space between the inner air inlet and the exchange core; An air valve is disposed between the first space and the second space; a first fan assembly, disposed in the first space, the first fan assembly comprising a first centrifugal impeller; and a second fan assembly, disposed in the third space, the second fan assembly comprising a second centrifugal impeller; Among them, indoor air flows into the casing from the inner air inlet, enters the second centrifugal fan impeller, then enters the exchange core from the second air inlet surface, flows out of the exchange core from the second air outlet surface and enters the second space, enters the first space through the air valve, enters the exchange core again from the first air inlet surface, flows out of the exchange core from the first air outlet surface, and flows out from the inner air outlet.

10. The total heat exchanger according to claim 9, wherein the first fan assembly further comprises a first air guide baffle and a first bracket, the first air guide baffle being enclosed between the external air inlet and the first centrifugal fan impeller, the first bracket supporting and guiding the first centrifugal fan impeller so that one axial end of the first centrifugal fan impeller faces the external air inlet and the other axial end faces the first air inlet surface of the exchange core; and The second fan assembly also includes a second air guide baffle and a second bracket. The second air guide baffle is enclosed between the inner air inlet and the second centrifugal fan impeller. The second bracket supports and guides the second centrifugal fan impeller so that one axial end of the second centrifugal fan impeller faces the inner air inlet and the other end faces the second air inlet surface of the exchange core.

11. The total heat exchanger as claimed in claim 9, wherein the first centrifugal impeller and the second centrifugal impeller are respectively centrifugal impellers without a volute.

12. The total heat exchanger as claimed in claim 10, wherein the first bracket is arranged between the external air inlet and the exchange core, and comprises a first support member and a first bottom plate, the first centrifugal fan impeller is arranged on the first support member, and comprises a first motor, the first support member is attached to the bottom of the first motor, the first bottom plate has a first rear edge, the position of the first rear edge forms a first angle with the X-axis, so that the first rear edge frame faces the first air inlet surface of the exchange core; and The second bracket is arranged between the inner air inlet and the exchange core and includes a second support member and a second bottom plate. The second centrifugal fan impeller is arranged on the second support member and includes a second motor. The second support member is attached to the bottom of the second motor. The second bottom plate has a second trailing edge. The position of the second trailing edge forms a second angle with the X-axis, so that the second trailing edge faces the second air inlet surface of the exchange core.

13. The total heat exchanger as claimed in claim 12, wherein the first centrifugal impeller is supported by the first bracket and rotates in a first rotation axis direction, the first support member has a first normal direction, the first normal direction is parallel to the first rotation axis direction, and has a first offset angle relative to the Z axis; and The second centrifugal impeller is supported by the second bracket and rotates in a second rotation axis direction. The second support member has a second normal direction, which is parallel to the second rotation axis direction and has a second offset angle relative to the Z axis.

14. A total heat exchanger, comprising: A housing, comprising a box body and a cover plate covering the box body, the box body comprising a plurality of partitions, and an outer air inlet and an outer air outlet are arranged on one side of the box body, and an inner air inlet and an inner air outlet are arranged on the other side opposite thereto; and an exchange core, arranged in the box, comprising a first air inlet surface facing the outer air inlet, a second air inlet surface facing the inner air inlet, a first air outlet surface relative to the first air inlet surface, and a second air outlet surface relative to the second air inlet surface, wherein the partition of the box and the exchange core divide the interior of the box into a first space, a second space, a third space, and a fourth space, the first space is defined as the space between the outer air inlet and the exchange core, the second space is defined as the space between the outer air inlet and the exchange core, the third space is defined as the space between the inner air outlet and the exchange core, and the fourth space is defined as the space between the inner air inlet and the exchange core; An air valve is disposed between the first space and the second space; a first fan assembly, disposed in the first space, comprising a first centrifugal fan impeller, a first air guide baffle and a first bracket, wherein the first air guide baffle is enclosed between the external air inlet and the first centrifugal fan impeller, and the first bracket supports and guides the first centrifugal fan impeller so that one axial end of the first centrifugal fan impeller faces the external air inlet and the other end faces the first air inlet surface of the exchange core; a second fan assembly, disposed in the third space, comprising a second centrifugal fan impeller, a second air guide baffle and a second bracket, wherein the second air guide baffle is enclosed between the inner air inlet and the second centrifugal fan impeller, and the second bracket supports and guides the second centrifugal fan impeller so that one axial end of the second centrifugal fan impeller faces the inner air inlet and the other end faces the second air inlet surface of the exchange core; Wherein, outdoor air flows from the external air inlet through the first air guide baffle, enters the exchange core through the first centrifugal fan impeller and flows out from the internal air outlet, and indoor air flows from the internal air inlet through the second air guide baffle, enters the exchange core through the second centrifugal fan impeller and flows out from the external air outlet; and Indoor air flows into the casing from the inner air inlet, enters the second centrifugal fan impeller, enters the exchange core from the second air inlet surface, flows out of the exchange core from the second air outlet surface and enters the second space, enters the first space through the air valve, enters the exchange core again from the first air inlet surface, flows out of the exchange core from the first air outlet surface, and flows out from the inner air outlet. 15 . The total heat exchanger as claimed in claim 14 , wherein the first centrifugal impeller and the second centrifugal impeller are respectively centrifugal impellers without a volute.

16. The total heat exchanger as claimed in claim 14, wherein the first bracket is arranged between the external air inlet and the exchange core, and comprises a first support member and a first bottom plate, the first centrifugal fan impeller is arranged on the first support member, and comprises a first motor, the first support member is attached to the bottom of the first motor, the first bottom plate has a first rear edge, the position of the first rear edge forms a first angle with the X-axis, so that the first rear edge frame faces the first air inlet surface of the exchange core; and The second bracket is arranged between the inner air inlet and the exchange core and includes a second support member and a second bottom plate. The second centrifugal fan impeller is arranged on the second support member and includes a second motor. The second support member is attached to the bottom of the second motor. The second bottom plate has a second trailing edge. The position of the second trailing edge forms a second angle with the X-axis, so that the second trailing edge faces the second air inlet surface of the exchange core.

17. The total heat exchanger as claimed in claim 16, wherein the first centrifugal impeller is supported by the first bracket and rotates in a first rotation axis direction, the first support member has a first normal direction, the first normal direction is parallel to the first rotation axis direction, and has a first offset angle relative to the Z axis; and The second centrifugal impeller is supported by the second bracket and rotates in a second rotation axis direction. The second support member has a second normal direction, which is parallel to the second rotation axis direction and has a second offset angle relative to the Z axis.

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