Heat exchange device

Abstract

The utility model discloses a heat exchange device, which comprises a shell, a heat exchanger, a heat exchanger, a heat exchanger, a heat exchanger and a heat exchange device, and is characterized in that the shell comprises a top wall, a bottom wall and side walls connecting the top wall and the bottom wall; the air supply air inlet, the air supply air outlet, the exhaust air inlet and the exhaust air outlet are formed in the shell, and the exhaust air path is communicated with the exhaust air inlet and the exhaust air outlet; the exhaust fan is arranged on the upstream side of the exhaust air outlet; the air conditioner further comprises a bypass air path, part of an air path of the bypass air path is overlapped with part of an air path of the exhaust air path, and air entering the shell from the exhaust air inlet can flow through the bypass air path and is exhausted from the exhaust air outlet. According to the heat exchange device, the bypass air path is arranged in the shell, part of the air path of the bypass air path is overlapped with part of the air path of the exhaust air path, air entering the shell from the exhaust air inlet can flow through the bypass air path and is exhausted from the exhaust air outlet, and the bypass air path shares part of the air path with the original exhaust air path in the shell. Efficient ventilation can be achieved, and meanwhile miniaturization of the heat exchange device is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, in particular to a heat exchange device. Background Art

[0002] The prior art discloses a full heat exchange fresh air fan, including a chassis shell, a full heat exchange unit, a fresh air inlet, an exhaust outlet, a return air inlet and an air supply outlet. The chassis shell is provided with a filter screen on each exchange side corresponding to the full heat exchange unit, and a bypass channel is provided on one side of the chassis shell. After entering the bypass channel, the air is guided from the return air inlet on the left side of the heat exchange fresh air fan to the exhaust outlet on the right side along the bypass channel. When the outdoor temperature is suitable and heat exchange is not required, it is only filtered through the filter screen to avoid heat exchange, while reducing the loss of the full heat exchange unit and extending the service life.

[0003] However, when a bypass channel is provided on one side of the chassis shell, not only will the length of the heat exchange fresh air fan, that is, the total volume, be increased, but the path for air to enter from the left and be discharged from the right is longer, resulting in a slow ventilation speed. Utility Model Content

[0004] In order to solve the above-mentioned problems, the utility model provides a heat exchange device, in which a bypass air passage is constructed in a shell, and part of the bypass air passage overlaps with part of the exhaust air passage. The bypass air passage shares part of the air passage with the original exhaust air passage in the shell, which can not only achieve efficient ventilation, but also is conducive to the miniaturization of the heat exchange device.

[0005] The heat exchange device proposed in the utility model comprises:

[0006] The housing comprises: a top wall, a bottom wall, and a side wall connecting the top wall and the bottom wall;

[0007] an air inlet, arranged on the housing, for allowing the air in the first space to enter the housing;

[0008] An air outlet is provided on the housing and is used to blow the air entering the housing to the second space;

[0009] an exhaust air inlet, disposed on the housing, for allowing the air in the second space to enter the housing;

[0010] an exhaust air outlet, arranged on the housing, for blowing the air entering the housing into the first space;

[0011] An exhaust air path connecting the exhaust air inlet and the exhaust air outlet;

[0012] An exhaust fan, arranged at the upstream side of the exhaust outlet;

[0013] It is characterized by further comprising: a bypass air path,

[0014] A portion of the bypass air passage overlaps with a portion of the exhaust air passage, and the air entering the housing from the exhaust air inlet can flow through the bypass air passage and be discharged from the exhaust air outlet.

[0015] In some optional embodiments, it further includes: a heat exchange unit, which is arranged in the housing, the air supply path connects the air supply inlet and the air supply outlet, and the air flowing through the air supply path and the air flowing through the exhaust path perform heat exchange when passing through the heat exchange unit; the heat exchange unit includes: an air supply outlet surface and an exhaust outlet surface, the air supply outlet surface is arranged in the air supply path, and the exhaust outlet surface is arranged in the exhaust path; the bypass air path includes:

[0016] A first bypass air passage, the first bypass air passage is arranged close to the exhaust air inlet, and the extension direction of the first bypass air passage is perpendicular to the extension direction of the heat exchange unit; a second bypass air passage, the second bypass air passage is connected to the first bypass air passage, and the second bypass air passage is arranged on the downstream side of the exhaust air outlet surface of the heat exchange unit.

[0017] In some optional embodiments, the exhaust air path includes: a first exhaust air path, arranged on the upstream side of the exhaust outlet surface of the heat exchange unit; a second exhaust air path, arranged on the downstream side of the exhaust outlet surface of the heat exchange unit; and the second bypass air path overlaps with the second exhaust air path.

[0018] In some optional embodiments, a communication opening is provided between the first bypass air passage and the second bypass air passage, and the air in the first bypass air passage passes through the communication opening and enters the second bypass air passage.

[0019] In some optional embodiments, the plane where the connecting port is located intersects with the plane where the exhaust air outlet surface of the heat exchange unit is located.

[0020] In some optional embodiments, the communication port includes a first communication port and a second communication port.

[0021] In some optional embodiments, the first communication port is disposed in the middle of the heat exchange device.

[0022] In some optional embodiments, it also includes: a first filter, which is arranged on the downstream side of the air supply outlet surface of the heat exchange unit in the air supply air path; and the first connecting port is arranged on the end surface side of the first filter close to the exhaust air outlet surface.

[0023] In some optional embodiments, it also includes: an air supply fan, arranged on the upstream side of the air supply outlet; a partition plate for the air supply fan, arranged between the air supply fan and the top wall to separate the air supply path from the exhaust path; a support member for the air supply fan, arranged on the partition plate for the air supply fan and extending toward the top wall; and the second connecting port is arranged on the support member for the air supply fan.

[0024] In some optional embodiments, a bypass air valve is provided on the downstream side of the exhaust air inlet, and the bypass air valve is operable to switch between a first position and a second position; when the bypass air valve is in the first position, the bypass air valve closes the exhaust air path, and air enters the shell from the bypass air path; when the bypass air valve is in the second position, the bypass air valve closes the bypass air path, and air enters the shell from the exhaust air path.

[0025] The heat exchange device of the utility model constructs a bypass air path in a shell, and part of the bypass air path overlaps with part of the exhaust air path. The air entering the shell from the exhaust air inlet can flow through the bypass air path and be discharged from the exhaust air outlet. The bypass air path shares part of the air path with the original exhaust air path in the shell, which can not only achieve efficient ventilation, but also facilitate the miniaturization of the heat exchange device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is one of the internal structure schematic diagrams of the heat exchange device of an embodiment of the utility model;

[0027] Figure 2 This is a second schematic diagram of the internal structure of the heat exchange device according to an embodiment of the utility model;

[0028] Figure 3 A cross-sectional view of a heat exchange device according to an embodiment of the utility model;

[0029] Figure 4 A schematic diagram of air flow in the heat exchange device of an embodiment of the utility model in an internal circulation mode;

[0030] Figure 5 A schematic diagram of air flow in a heat exchange device in a mixed air mode according to an embodiment of the utility model;

[0031] Figure 6 A schematic diagram of air flow in a heat exchange mode of a heat exchange device according to an embodiment of the utility model;

[0032] Figure 7 A schematic diagram of air flow in a heat exchange device according to an embodiment of the utility model in a normal ventilation mode;

[0033] Reference numerals:

[0034] Shell 10, first side wall 11, air supply inlet 111, exhaust outlet 112, second side wall 12, air supply outlet 121, exhaust inlet 122, third side wall 13, fourth side wall 14, top wall 15, bottom wall 16, first mounting plate 17, second mounting plate 18, support baffle 19, heat exchange unit 20, air supply inlet surface 21, air supply outlet surface 22, exhaust air inlet surface 23, exhaust outlet surface 24, first bypass ventilation passage 31, second bypass ventilation passage 32, first connecting port 33, second connecting port 34, bypass ventilation valve 41, air guide port 42, first filter 51, second filter 52, air supply fan 53, exhaust fan 54, partition plate 55 for air supply fan, and support member 56 for air supply fan. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0036] In the accompanying drawings, the second description of the same symbol for the same component and the description of components that are not directly related to the present invention will be omitted or simplified. In the following description, the directional terms of up, down, left, right, top, and bottom are all described based on the state shown in the figure of the heat exchange device in the embodiment of the present invention. In addition, in the following description, the directional terms of upstream and downstream are defined with reference to the direction of air flow in the body.

[0037] The following orientation or positional relationship is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present disclosure. Specifically, relative to the above, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0039] A heat exchange device is a device that draws in air from indoors and outdoors, exchanges heat inside, and then exhausts it indoors or outdoors. For example: fresh air and exhaust ventilation equipment containing heat exchange units. The heat exchange referred to here is the process of heat transfer and energy exchange between spaces caused by temperature differences.

[0040] The utility model provides a heat exchange device. Figures 1 to 7 The heat exchange device of the present utility model is described in detail.

[0041] Figure 1 This is one of the internal structure schematic diagrams of the heat exchange device of an embodiment of the utility model; Figure 2 This is a second schematic diagram of the internal structure of the heat exchange device according to an embodiment of the utility model; Figure 3 It is a cross-sectional view of a heat exchange device according to an embodiment of the utility model.

[0042] The heat exchange device of this embodiment can be installed indoors, and the outdoor and indoor are separated by a wall.

[0043] The heat exchange device includes a housing 10, a heat exchange unit 20, an exhaust fan 54, an air supply fan 53, and the like.

[0044] The shell 10 is used to form the outer contour of the heat exchange device and is in the shape of a hollow rectangular box. The shell 10 includes a top wall 15, a bottom wall 16, and four side walls. Figure 1 From the perspective of FIG. 1 , the top wall 15 and the bottom wall 16 are respectively located at the top and bottom of the housing 10. The four side walls are respectively a first side wall 11 arranged on the right side, a second side wall 12 arranged on the left side of the housing 10 opposite to the first side wall 11, a third side wall 13 arranged at the front of the housing 10 adjacent to the first side wall 11 and the second side wall 12, and a fourth side wall 14 arranged at the rear of the housing 10, and the third side wall 13 and the fourth side wall 14 are arranged opposite to each other.

[0045] The housing 10 is provided with an air supply inlet 111, an air supply outlet 121, an exhaust air inlet 122 and an exhaust air outlet 112. That is, the air supply inlet 111 is provided in the air supply inlet space, the exhaust air inlet 122 is provided in the exhaust air supply inlet space, the air supply outlet 121 is provided in the air supply outlet space, and the exhaust air outlet 112 is provided in the exhaust air outlet space.

[0046] The air supply inlet 111 is used to allow the air in the first space to enter the housing 10, and the air supply outlet 121 is used to allow the air entering the housing 10 to be blown out to the second space. The first space and the second space can be different areas of the same space. The first space and the second space can also be two isolated spaces, for example, one of the first space and the second space is outdoors and the other is indoors. For ease of description, the following description is based on the example that the first space is outdoors and the second space is indoors.

[0047] The air supply inlet 111 is an opening that connects the inside of the housing 10 and the outside through a duct to allow outdoor air to enter the inside of the housing 10. The air supply inlet 111 can be disposed on the first side wall 11 of the housing 10, and is located on the right side of the housing 10.

[0048] The air supply outlet 121 is an opening that connects the interior of the housing 10 and the room through a duct so that the air in the housing 10 is blown into the room. The air supply outlet 121 can be disposed on the second side wall 12 of the housing 10 and located on the left side of the housing 10.

[0049] The exhaust air inlet 122 is an opening that connects the interior of the shell 10 and the room through a pipe to suck the indoor air into the shell 10. The exhaust air inlet 122 can be set on the second side wall 12 of the shell 10, located on the left side of the shell 10. The exhaust air inlet 122 is in a normally open state, that is, the heat exchange device is in a heat exchange mode, an internal circulation mode, and a ventilation mode. The exhaust air inlet 122 is open. In this embodiment, a bypass air valve 41 is set on the downstream side of the exhaust air inlet 122, and the bypass air valve 41 is used to switch the indoor air into the shell 10 through the exhaust air path or the bypass air path. That is to say, when the bypass air valve 41 closes the exhaust air path, the indoor air enters the shell 10 from the bypass air path; when the bypass air valve 41 closes the bypass air path, the indoor air enters the shell 10 from the exhaust air path.

[0050] The exhaust air outlet 112 is an opening that connects the inside of the housing 10 with the outside of the housing through a pipe so that the air in the housing 10 is blown to the outside of the housing. The exhaust air outlet 112 is disposed on the first side wall 11 of the housing 10 and is located on the right side of the housing 10.

[0051] The air supply path connects the air supply inlet 111 and the air supply outlet 121 , and is a path for guiding air to enter from the air supply inlet 111 , pass through the heat exchange unit 20 , and be discharged from the air supply outlet 121 .

[0052] The exhaust air path connects the exhaust air inlet 122 and the exhaust air outlet 112 , and is a path for guiding air to enter from the exhaust air inlet 122 , pass through the heat exchange unit 20 , and be discharged from the exhaust air outlet 112 .

[0053] The heat exchange unit 20 is arranged in the housing 10. The heat exchange unit 20 is composed of a plurality of thin plates bonded together. For example, the heat exchange unit 20 can be a full heat exchange core. Air flows in the air supply path and the air exhaust path, and heat is exchanged when passing through the heat exchange unit 20. The heat exchange unit 20 includes an air supply inlet surface 21 and an air supply outlet surface 22 in the air supply path; and an exhaust air inlet surface 23 and an exhaust air outlet surface 24 in the exhaust air path.

[0054] The heat exchange unit 20 may include: The heat exchange unit 20 may be composed of one heat exchange core, or may be composed of two or more heat exchange cores. Figure 1 As shown, this embodiment is composed of a plurality of heat exchange cores. For example, three heat exchange cores are arranged side by side. The three heat exchange cores are all parallelepipeds. The three heat exchange cores constitute a heat exchange unit 20.

[0055] Two mounting plates are also provided in the housing 10, and the two mounting plates are spaced apart, and the spacing between the two mounting plates is adapted to the length of the heat exchange unit 20. The two mounting plates are defined as a first mounting plate 17 and a second mounting plate 18, respectively. The first mounting plate 17 is opposite to the first side wall 11, and the second mounting plate 18 is opposite to the second side wall 12. The components in the housing 10 can be mounted and fixed on the first mounting plate 17 and the second mounting plate 18. For example, one end of the heat exchange unit 20 is connected and fixed to the first mounting plate 17, or conflicts with each other; and the other end of the heat exchange unit 20 is connected and fixed to the second mounting plate 18, or conflicts with each other.

[0056] The filter unit is used to filter and absorb impurities in the air passing through the air supply path or the air exhaust path, thereby purifying the air. The filter unit includes a first filter 51 and a second filter 52 .

[0057] The first filter 51 is arranged in the air supply path and downstream of the air supply outlet surface 22 of the heat exchange unit 20. The first filter 51 is arranged near the middle of the heat exchange device and is arranged opposite to the circuit board box, which is arranged on the outer wall surface of the second side wall 12 and is located between the exhaust air inlet 122 and the air supply outlet 121.

[0058] The second filter 52 is disposed in the air supply path and upstream of the air supply inlet surface 21 of the heat exchange unit 20. The second filter 52 is disposed opposite to the air supply inlet 111 and close to the third side wall 13.

[0059] The fan unit includes an exhaust fan 54 and an air supply fan 53 .

[0060] The exhaust fan 54 includes an exhaust motor and exhaust blades. The exhaust motor rotates to drive the exhaust blades to rotate and generate air flow. The exhaust blades may be, for example, multi-blade centrifugal blades. The supply air fan 53 includes an supply air motor and supply air blades. The supply air motor rotates to drive the air blades to rotate and generate air flow. The supply air blades may be, for example, multi-blade centrifugal blades. The exhaust fan 54 and the supply air fan 53 are arranged on the downstream side of the heat exchange unit 20 opposite to each other. The air blown out from the supply air outlet surface 22 of the heat exchange unit 20 enters the supply air fan 53, and the air blown out from the exhaust air outlet surface 24 of the heat exchange unit 20 enters the exhaust fan 54.

[0061] A bypass air passage is constructed in the shell 10, and a part of the bypass air passage is close to the exhaust air inlet 122, and a part of the bypass air passage is close to the exhaust air outlet 112. The air entering the shell 10 through the exhaust air inlet 122 can flow through the bypass air passage and then be discharged from the exhaust air outlet 112. The bypass air passage includes a first bypass air passage 31 close to the exhaust air inlet 122 and a second bypass air passage 32 close to the exhaust air outlet 112. The first bypass air passage 31 and the second bypass air passage 32 can be directly connected, and the first bypass air passage 31 and the second bypass air passage 32 can also be connected through a transition section air passage. The first bypass air passage 31 and the second bypass air passage 32 are not connected to the heat exchange unit 20.

[0062] Part of the bypass air path overlaps with part of the exhaust air path, for example, the second bypass air path 32 overlaps with the exhaust air path, thereby making full use of the internal space within the shell 10. By sharing part of the air path with the original exhaust air path within the shell 10, efficient ventilation can be achieved while reducing the air flow path, and the heat exchange device can be miniaturized.

[0063] The operation modes of the heat exchange device include internal circulation mode, mixed air mode and ventilation mode, and the ventilation mode includes heat exchange mode and ordinary ventilation mode. In the ventilation mode, the heat exchange device operates in heat exchange mode or ordinary ventilation mode according to the outdoor temperature and humidity parameters.

[0064] The following describes the normal ventilation mode of the heat exchange device.

[0065] When the heat exchange device is in the normal ventilation mode, the air supply inlet 111, the air supply outlet 121, the exhaust air inlet 122, and the exhaust air outlet 112 are opened. The air supply fan 53 and the exhaust fan 54 are started, the exhaust air path is closed, and the bypass air path is opened. The outdoor air entering the housing 10 from the air supply inlet 111 enters the air supply air path, enters the heat exchange unit 20, and is blown into the room from the air supply outlet 121. At the same time, the indoor air entering from the exhaust air inlet 122 flows through the bypass air path, does not pass through the heat exchange unit 20, avoids heat exchange, and is directly blown out from the exhaust air outlet 112, thereby achieving indoor ventilation.

[0066] In the normal ventilation mode, the air flowing through the bypass air passage does not pass through the heat exchange unit 20, thereby speeding up the ventilation.

[0067] In the embodiment of the present disclosure, a bypass air passage is constructed in the shell 10, and part of the bypass air passage overlaps with part of the exhaust air passage. The air entering the shell 10 from the exhaust air inlet 122 can flow through the bypass air passage and be discharged from the exhaust air outlet 112. The bypass air passage shares part of the air passage with the original exhaust air passage in the shell 10, which can not only achieve efficient ventilation, but also facilitate the miniaturization of the heat exchange device.

[0068] like Figure 1 and Figure 2 As shown, in an optional embodiment, the heat exchange device further includes an airflow partition plate, and the airflow partition plate includes an air supply fan partition plate 55 and an exhaust fan partition plate that separate the air supply duct and the exhaust duct.

[0069] The air supply fan partition plate 55 is disposed between the air supply fan 53 and the top wall 15, and extends from the air supply outlet 121 side to the middle of the housing 10, and is used to separate the air supply path from the exhaust path. Specifically, the air in the exhaust path will not be sucked into the air supply path by the air supply fan 53 through the partition of the air supply fan partition plate 55.

[0070] The air supply fan support member 56 is disposed on the air supply fan partition plate 55 and extends toward the top wall 15, that is, is longitudinally disposed between the air supply fan partition plate 55 and the top wall 15. In one embodiment, the air supply fan support member 56 may be a support plate.

[0071] The exhaust fan partition plate is disposed between the exhaust fan 54 and the bottom wall 16, extending from the exhaust outlet 112 side to the middle of the housing 10, and is used to separate the air supply path from the exhaust path. Specifically, the air in the air supply path will not be sucked into the exhaust path by the exhaust fan 54 through the partition of the exhaust fan partition plate.

[0072] The exhaust fan support member is arranged on the exhaust fan partition plate and extends toward the bottom wall 16. That is, it is longitudinally arranged between the exhaust fan partition plate and the bottom wall 16. In one embodiment, the exhaust fan support member can be a support plate.

[0073] In an optional embodiment, the exhaust air passage includes a first exhaust air passage and a second exhaust air passage.

[0074] The first exhaust air path is the air path from the exhaust air inlet 122 to the exhaust air outlet surface 24 of the heat exchange unit 20, that is, the upstream side of the exhaust air outlet surface 24. That is, the air entering the exhaust air path enters the heat exchange unit 20 from the exhaust air inlet surface 23 of the heat exchange unit 20, and is discharged from the exhaust air outlet surface 24 of the heat exchange unit 20 after heat exchange at the heat exchange unit 20.

[0075] The second exhaust air path is the air path from the downstream side of the exhaust outlet surface 24 to the exhaust outlet port 112 , i.e., the downstream side of the exhaust outlet surface 24 , which overlaps with the second bypass air path 32 described later, i.e., is the same as the air path of the second bypass air path 32 .

[0076] like Figure 1 and Figure 2 As shown, in an optional embodiment, the bypass air passage includes a first bypass air passage 31 and a second bypass air passage 32, and the first bypass air passage 31 and the second bypass air passage 32 are as shown in FIG. Figure 1 The first bypass air passage 31 is arranged near the exhaust air inlet 122 , and the extension direction of the first bypass air passage 31 is perpendicular to the extension direction of the heat exchange unit 20 ; the second bypass air passage 32 is arranged on the downstream side of the exhaust air outlet surface 24 of the heat exchange unit 20 .

[0077] The extension direction of the heat exchange unit 20 is consistent with the length direction of the heat exchange unit 20. The heat exchange unit 20 is usually composed of a plurality of heat exchange cores stacked side by side, and the length direction of the heat exchange unit 20 is consistent with the stacking direction of the plurality of heat exchange cores. In the case where the heat exchange unit 20 includes one heat exchange core, the length direction of the heat exchange unit 20 is the direction in which the plurality of thin plates constituting the heat exchange core are stacked.

[0078] Optionally, a communication port is provided between the first bypass air passage 31 and the second bypass air passage 32 , and the air in the first bypass air passage 31 enters the second bypass air passage 32 through the communication port.

[0079] like Figure 1 As shown, the second side wall 12 , the second mounting plate 18 , the top wall 15 , the bottom wall 16 and a partial area of ​​the third side wall 13 enclose a first bypass air passage 31 .

[0080] The first bypass air passage 31 is perpendicular to the long side of the heat exchange unit 20 , that is, in a direction parallel to the short side of the heat exchange unit 20 , and is provided between the bypass air valve 41 and the communication port.

[0081] A support baffle 19 is also constructed in the housing 10, one end of the support baffle 19 is connected to the first mounting plate 17, and the other end of the support baffle 19 is connected to the second mounting plate 18. The edges of the air supply outlet surface 22 and the exhaust outlet surface 24 intersecting each other extend toward the fourth side wall 14 to form a reference plane, and the plane where the support baffle 19 is located is not lower than the reference plane. Thus, the exhaust outlet surface 24, the support baffle 19 and the top wall 15 enclose a second bypass air passage 32.

[0082] The second bypass air passage 32 is located at the downstream side of the exhaust air outlet surface 24 of the heat exchange unit 20 . The second bypass air passage 32 is provided between the communication port and the exhaust fan 54 . The second bypass air passage 32 overlaps with the second exhaust air passage.

[0083] In this embodiment, the first bypass air passage 31 is arranged on the circuit board box side. After the air entering from the exhaust air inlet 122 enters the first bypass air passage 31, it passes through the circuit board box side and flows through the connecting port arranged between the first bypass air passage 31 and the second bypass air passage 32 to enter the second bypass air passage 32.

[0084] The second bypass air passage 32 of this embodiment overlaps with the second exhaust air passage, that is, the path of air entering the exhaust fan 54 from the second bypass air passage 32 is the same as the path of air entering the exhaust fan 54 after passing through the heat exchange unit 20 in the exhaust air passage.

[0085] Optionally, the communication port is used to connect the first bypass air passage 31 and the second bypass air passage 32. The communication port includes a first communication port 33 and a second communication port 34, and the first communication port 33 and the second communication port 34 are arranged in parallel.

[0086] The first connecting port 33 is provided on the second mounting plate 18, and is an opening on the second mounting plate 18 near the first filter 51 side, specifically, between the end edge of the first filter 51 near the exhaust outlet surface 24 and the top wall 15, so that air can enter the second bypass air passage 32 from the upper part of the first filter 51. In other embodiments, the first connecting port 33 can also be formed by the end edge of the first filter 51, the edge of the exhaust outlet surface 24 of the heat exchange unit 20, and the edge or top wall 15 of the inspection plate.

[0087] The second communication port 34 is provided on the air supply fan support member 56, that is, the second communication port 34 of this embodiment is an opening provided on the air supply fan support member 56. The size and number of the opening are provided according to actual needs.

[0088] The first connecting port 33 is arranged in the middle of the heat exchange device, which is conducive to shortening the overall length of the bypass air passage. By providing the second connecting port 34, the air flowing through the first bypass air passage 31 can also flow into the second bypass air passage 32 through the second connecting port 34, thereby increasing the area of ​​air circulation and facilitating the speed of ventilation.

[0089] The first communication port 33 and the second communication port 34 are provided by utilizing the existing supporting parts in the housing 10 , so as to realize the communication between the first bypass air passage 31 and the second bypass air passage 32 , and reasonably utilize the internal space of the housing 10 .

[0090] Compared with the bypass air duct in the prior art, it is not necessary to enlarge the overall volume of the heat exchange device to set up the bypass air duct, that is, it is not necessary to set up another bypass air duct between the fourth side wall 14 and the fan unit. Instead, by setting a connecting port, the air entering the bypass air duct enters the second bypass air duct 32 from the middle of the heat exchange device or the air supply fan 53 side.

[0091] The second bypass air passage 32 overlaps with the second exhaust air passage, which is not only beneficial to the miniaturization of the overall heat exchange device and cost savings, but also beneficial to shortening the overall length of the bypass air passage. When the air passage becomes shorter, not only the ventilation speed is accelerated, but also the odor in the room can be discharged to the outside more quickly along the bypass air passage, thereby achieving efficient ventilation.

[0092] like Figure 1 and Figure 2 As shown, in an optional embodiment, a bypass air valve 41 is provided on the downstream side of the exhaust air inlet 122, and the bypass air valve 41 can be operably switched between a first position and a second position.

[0093] For example, an air guide port 42 connected to the exhaust air inlet surface 23 is disposed at the bottom of the second mounting plate 18 , and a bypass air valve 41 is rotatably disposed at the air guide port 42 , and the bypass air valve 41 can open or close the air guide port 42 .

[0094] The bypass air valve 41 rotates to the first position, and the bypass air valve 41 closes the air guide port 42, that is, the bypass air valve 41 closes the exhaust air path. The exhaust air inlet 122 is connected to the first bypass air path 31, and the air entering from the exhaust air inlet 122 flows through the first bypass air path 31 into the housing 10.

[0095] The bypass air valve 41 rotates to the second position, the bypass air valve 41 opens the air duct 42, and at the same time the bypass air valve 41 conflicts with the upper area of ​​the exhaust air inlet 122 on the second side wall 12, the bypass air valve 41 blocks the connection between the exhaust air inlet 122 and the first bypass air passage 31, the exhaust air inlet 122 is connected to the air duct 42, and the air entering from the exhaust air inlet 122 flows from the air duct 42 to the heat exchange unit 20 and enters the shell 10.

[0096] A bypass air valve 41 is arranged on the downstream side of the exhaust air inlet 122. The exhaust air inlet 122 is connected with the exhaust air path or the bypass air path by rotating the bypass air valve 41. The structure is simple, and the exhaust air path or the bypass air path can be closed conveniently, and the operation is convenient.

[0097] The above is a description of the structure of the heat exchange device, and the following is a description of the operation mode of the heat exchange device. The heat exchange device of this embodiment includes: an internal circulation mode, a mixed air mode, and a ventilation mode.

[0098] Figure 4 A schematic diagram of air flow in the heat exchange device of an embodiment of the utility model in an internal circulation mode; Figure 5 A schematic diagram of air flow in a heat exchange device in a mixed air mode according to an embodiment of the utility model; Figure 6 A schematic diagram of air flow in a heat exchange mode of a heat exchange device according to an embodiment of the utility model; Figure 7 It is a schematic diagram of air flow when the heat exchange device according to an embodiment of the utility model is in a normal ventilation mode.

[0099] like Figure 4 As shown, when the heat exchange device is in the internal circulation mode, the exhaust air outlet 112 and the air supply air inlet 111 are closed, the exhaust air inlet 122 and the air supply air outlet 121 are opened, the air supply fan 53 and the exhaust fan 54 are started, the bypass air valve 41 on the downstream side of the exhaust air inlet 122 closes the bypass air path, and the exhaust air path is opened. The indoor air entering the housing 10 through the exhaust air inlet 122 enters the exhaust air path and then enters the heat exchange unit 20. When the indoor air reaches the exhaust air outlet 112 after passing through the heat exchange unit 20, since the exhaust air outlet 112 is closed, the air will not be discharged from the exhaust air outlet 112, but will enter the air supply air path along the channel connecting the exhaust air outlet 112 and the air supply air inlet 111, and then enter the heat exchange unit 20. After the indoor air passes through the heat exchange unit 20 again, it is discharged to the room from the air supply air outlet 121, thereby realizing indoor air circulation.

[0100] like Figure 5 As shown, when the heat exchange device is in the mixed air mode, the air supply inlet 111 is opened on the basis of the internal circulation mode. At this time, the exhaust air outlet 112 is still in a closed state. Outdoor air enters from the air supply inlet 111 and mixes with the air before passing through the air supply inlet 111. Although fresh air is also introduced in the mixed air mode, the amount of fresh air entering is less than that in the ventilation mode.

[0101] like Figure 6As shown, when the heat exchange device is in the heat exchange mode, the air supply outlet 121, the air supply inlet 111, the exhaust air inlet 122, and the exhaust air outlet 112 are opened. At this time, the air supply fan 53 and the exhaust fan 54 are started at the same time, and the bypass air valve 41 on the downstream side of the exhaust air inlet 122 closes the bypass air path, and the exhaust air path is opened. The indoor air entering the housing 10 from the exhaust air inlet 122 and a part of the outdoor air entering the housing 10 from the air supply inlet 111 exchange energy with each other at the heat exchange unit 20 to achieve heat exchange. After exchanging energy, the air entering from the exhaust air inlet 122 enters the exhaust fan 54 after heat exchange, and is blown out of the room from the exhaust air outlet 112. At the same time, the air entering from the air supply inlet 111 enters the air supply fan 53 after heat exchange, and is blown out of the room from the air supply outlet 121, achieving heat exchange and ventilation at the same time.

[0102] like Figure 7 As shown, when the heat exchange device is in the normal ventilation mode, the air supply inlet 111, the air supply outlet 121, the exhaust air inlet 122, and the exhaust air outlet 112 are opened. The air supply fan 53 and the exhaust fan 54 are started, and the air valve on the downstream side of the exhaust air inlet 122 closes the exhaust air path, and the bypass air path is opened. After the outdoor air enters the housing 10 through the air supply inlet 111, it enters the air supply air path, enters the heat exchange unit 20, and is blown out of the room from the air supply outlet 121. At the same time, after the indoor air enters from the exhaust air inlet 122, it enters the first bypass air path 31, passes through the first connecting port 33 and / or the second connecting port 34, and enters the second bypass air path 32 without passing through the heat exchange unit 20, avoiding heat exchange, and is directly blown out from the exhaust air outlet 112, thereby achieving indoor ventilation.

[0103] In the normal ventilation mode, the air flowing through the bypass air passage does not need to pass through the heat exchange unit 20, thereby speeding up the ventilation.

[0104] So far, the embodiments of the present invention have been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the present invention.

[0105] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element are not limited to the various specific structures and shapes mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0106] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchange device, comprising: The housing comprises: a top wall, a bottom wall, and a side wall connecting the top wall and the bottom wall; an air inlet, arranged on the housing, for allowing the air in the first space to enter the housing; An air outlet is provided on the housing and is used to blow the air entering the housing to the second space; an exhaust air inlet, disposed on the housing, for allowing the air in the second space to enter the housing; an exhaust air outlet, arranged on the housing, for blowing the air entering the housing into the first space; An exhaust air path connecting the exhaust air inlet and the exhaust air outlet; An exhaust fan, arranged at the upstream side of the exhaust outlet; It is characterized by further comprising: a bypass air passage, A portion of the bypass air passage overlaps with a portion of the exhaust air passage, and the air entering the housing from the exhaust air inlet can flow through the bypass air passage and be discharged from the exhaust air outlet.

2. The heat exchange device according to claim 1, characterized in that: Also includes: A heat exchange unit is arranged in the housing, the air supply path is connected to the air supply inlet and the air supply outlet, and the air flowing through the air supply path and the air flowing through the exhaust path perform heat exchange when passing through the heat exchange unit; The heat exchange unit comprises: an air supply outlet surface and an exhaust outlet surface, wherein the air supply outlet surface is arranged in the air supply air path, and the exhaust outlet surface is arranged in the exhaust air path; The bypass air path comprises: a first bypass air passage, the first bypass air passage being arranged close to the exhaust air inlet, and an extending direction of the first bypass air passage being perpendicular to an extending direction of the heat exchange unit; The second bypass air passage is communicated with the first bypass air passage, and the second bypass air passage is arranged on the downstream side of the exhaust air outlet surface of the heat exchange unit.

3. The heat exchange device according to claim 2, characterized in that: The exhaust air path comprises: A first exhaust air passage is arranged at an upstream side of the exhaust air outlet surface of the heat exchange unit; A second exhaust air passage is arranged at a downstream side of the exhaust air outlet surface of the heat exchange unit; The second bypass air passage overlaps with the second exhaust air passage.

4. The heat exchange device according to claim 2, characterized in that: A communication port is provided between the first bypass air passage and the second bypass air passage, and air in the first bypass air passage passes through the communication port and enters the second bypass air passage.

5. The heat exchange device according to claim 4, characterized in that: The plane where the communication port is located intersects with the plane where the exhaust air outlet surface of the heat exchange unit is located.

6. The heat exchange device according to claim 4, characterized in that: The communication port includes a first communication port and a second communication port.

7. The heat exchange device according to claim 6, characterized in that: The first communication port is disposed in the middle of the heat exchange device.

8. The heat exchange device according to claim 6, characterized in that: Also includes: A first filter screen is arranged in the air supply path at a downstream side of the air supply outlet surface of the heat exchange unit; The first communication port is disposed on the end surface side of the first filter screen close to the exhaust outlet surface.

9. The heat exchange device according to claim 6, characterized in that: Also includes: An air supply fan, arranged at the upstream side of the air supply outlet; A partition plate for an air supply fan, arranged between the air supply fan and the top wall to separate the air supply passage from the air exhaust passage; A support member for the air supply fan, which is disposed on the partition plate for the air supply fan and extends toward the top wall; The second communication port is provided on the air supply blower support.

10. The heat exchange device according to any one of claims 1 to 9, characterized in that: A bypass air valve is provided on the downstream side of the exhaust air inlet, and the bypass air valve is operable to switch between a first position and a second position; The bypass air valve is located at the first position, the bypass air valve closes the exhaust air passage, and air enters the housing from the bypass air passage; The bypass air valve is located at the second position, the bypass air valve closes the bypass air passage, and air enters the housing from the exhaust air passage.

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