Fresh air machine with total heat recovery and bypass valve

Abstract

The utility model discloses a full heat recovery fresh air machine with bypass valve, including casing, hang and install structure, first air port, second air port, electric control part installation box, full heat exchange core body, fan assembly, baffle, base and bypass valve subassembly. The base is arranged in the casing, and the full heat exchange core body is installed on the base, the baffle is arranged in the casing, and the baffle cooperates with the casing and the base to divide the space in the machine, so that the heat exchange channel corresponding to the full heat exchange core body and the bypass channel bypassing the full heat exchange core body are adjacently arranged in the machine, the bypass valve subassembly is arranged in the shunt / confluence area of the heat exchange channel and the bypass channel, and forms an assembly cooperation relationship with the baffle or the casing. The structure makes the bypass valve match the boundary of the air duct in the machine, the internal arrangement of the whole machine is compact, the core body assembly positioning is definite, the electric control space is partitioned and arranged with the internal structure of the machine, and the whole machine assembly and maintenance are facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of heating, ventilation and air conditioning and indoor air quality equipment, and more specifically to a full heat recovery fresh air unit with a bypass valve. Background Technology

[0002] Fresh air systems are used to introduce outdoor air into indoor spaces and exhaust indoor air to improve indoor air quality and meet ventilation needs. To reduce energy loss during ventilation, existing fresh air systems are often equipped with a total heat exchange core, which allows the incoming fresh air and the exhaust return air to exchange heat and moisture in the channels on both sides of the core. This reduces the loss of indoor heat, cold, and humidity in winter and summer, thus improving the overall energy efficiency of the unit.

[0003] In practical applications, total heat recovery fresh air systems typically need to handle multiple operating conditions simultaneously. Especially during transitional seasons or when outdoor temperature and humidity are close to the indoor setpoints, continuous airflow through the total heat exchange core increases the resistance of the internal air ducts. Simultaneously, the temperature and humidity of the incoming air deviate from the target state after being exchanged by the core, easily leading to problems such as untimely indoor temperature and humidity regulation or fluctuations in comfort. Furthermore, under conditions of low temperature and high humidity, the total heat exchange core is at risk of frosting. Therefore, the entire unit often needs a structure capable of altering the airflow path to facilitate switching between different channels.

[0004] To meet these requirements, some total heat recovery fresh air systems are equipped with bypass channels and valve structures, allowing airflow to bypass the total heat exchange core. However, in existing bypass structures, the correspondence between the bypass channel and the internal air duct often relies on multiple connectors or transition parts. This results in multiple structural layers and dispersed assembly benchmarks, leading to unstable separation boundaries between the internal heat exchange channel and the bypass channel, which can easily lead to the accumulation of assembly errors. At the same time, when the installation position of the bypass valve is not well matched with structural components such as baffles and bases, the contact interface between the valve body and the port increases, resulting in more leakage points and a decrease in sealing consistency after long-term operation. In addition, the installation and disassembly of the total heat exchange core usually requires coordination with multiple air duct separation components, resulting in numerous maintenance and disassembly steps, limited maintenance space, and reduced on-site maintenance efficiency.

[0005] Therefore, there is an urgent need for a new type of fresh air unit with a bypass valve and full heat recovery, which has a higher degree of structural integration, clearer internal air duct separation, more stable matching between the bypass valve and the internal structure, and is easy to inspect and maintain. Utility Model Content

[0006] This utility model provides a total heat recovery fresh air unit with a bypass valve. By setting a partition inside the casing, the internal space is divided into a heat exchange air duct corresponding to the total heat exchange core and a bypass air duct that bypasses the total heat exchange core. A bypass valve assembly is set in the diversion / convergence area, so that the bypass valve assembly and the internal air duct structure form a stable assembly correspondence. At the same time, a base is set as the installation reference for the total heat exchange core, and an electrical control component mounting box is set on the side of the casing, forming a compact arrangement of the whole unit.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A total heat recovery fresh air unit with a bypass valve includes a casing, a mounting structure on the casing, a first air outlet and a second air outlet on the side of the casing, and a total heat exchange core and a fan assembly inside the casing, wherein:

[0009] The housing is equipped with a partition, which divides the interior of the housing into a heat exchange air duct and a bypass air duct.

[0010] The housing is equipped with a bypass valve assembly, which is arranged in the diversion / convergence area of ​​the heat exchange air duct and the bypass air duct.

[0011] Furthermore, the bypass valve assembly includes a valve body, a valve plate, and a drive component, wherein the valve plate is disposed within the valve body and is movable between a first position and a second position.

[0012] Furthermore, the valve body is provided with a heat exchange port communicating with the heat exchange duct and a bypass port communicating with the bypass duct; when the valve plate is in the first position, it blocks the bypass port and connects to the heat exchange port; when the valve plate is in the second position, it blocks the heat exchange port and connects to the bypass port.

[0013] Furthermore, a base is provided inside the housing, and the total heat exchange core is mounted on the base.

[0014] Furthermore, the partition is connected to the base, and the lower end of the partition forms an air duct boundary with the base.

[0015] Furthermore, the housing is provided with an internal flow guide, which is located between the fan assembly and the heat exchange duct / bypass duct.

[0016] Furthermore, the internal flow guide is a plate-shaped flow guide, which is arranged opposite to the partition and forms a flow guide gap therebetween.

[0017] Furthermore, the fan assembly is arranged in the upper region of the casing, and the total heat exchange core is arranged in the lower middle region of the casing.

[0018] Furthermore, the side of the housing is provided with an electrical control component mounting box, which contains a control board, a bypass valve actuator, and a fan drive module. The bypass valve actuator is connected to the bypass valve assembly.

[0019] Furthermore, the first air vent and the second air vent are respectively located on the upper and lower parts of the side of the casing.

[0020] Compared with the prior art, this utility model has at least the following beneficial effects: The utility model uses a partition to integrate the air duct within the machine, creating a clear structural boundary between the heat exchange channel and the bypass channel, reducing connection points and assembly deviations caused by external bypass pipes; the bypass valve is arranged in the diversion / convergence area of ​​the heat exchange channel and the bypass channel, forming a stable assembly correspondence with the internal partition and shell, making the relative position of the valve body and the air duct more stable and the sealing interface more concentrated; the total heat exchange core forms a unified installation benchmark through the base, making the positioning relationship between the core and the internal structure more reliable and easier to disassemble and assemble; the fan is arranged in the upper part of the machine and combined with the internal guide structure to form a continuous airflow transition area, making the internal layout more compact and the structural hierarchy clearer; the electrical control components are centrally located in an independent side space, with the electrical control space relatively separated from the air duct space, facilitating wiring and maintenance; the top of the entire machine is equipped with a hanging structure, improving the adaptability and construction convenience of wall mounting or hanging installation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the back structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the present invention from another perspective.

[0026] Among them, 1-casing; 101-mounting structure; 2-first air outlet; 3-second air outlet; 4-electrical control component mounting box; 5-heat exchange core; 102-bypass valve assembly; 103-internal guide section; 201-fan assembly; 301-partition plate; 302-base. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example

[0029] like Figure 1 and Figure 2 As shown, a total heat recovery fresh air unit with a bypass valve in this embodiment includes a housing 1, which is a box structure. A mounting structure 101 is provided on the top of the housing 1, and the mounting structure 101 is fixedly connected to the top surface of the housing 1 for wall mounting or ceiling mounting. A first air vent 2 and a second air vent 3 are provided on the side wall of the housing 1, and the first air vent 2 and the second air vent 3 are arranged vertically at intervals along the side wall of the housing 1. An electrical control component mounting box 4 is also provided on the side of the housing 1, and the electrical control component mounting box 4 is fixedly connected to the side wall of the housing 1 to form an independent electrical control installation space.

[0030] like Figure 3 and Figure 4 As shown, a base 302 is provided inside the housing 1. The base 302 is located in the lower part of the housing 1 and is fixedly connected to the housing 1. The total heat exchange core 5 is located in the lower middle part of the housing 1 and is mounted on the base 302. The outer periphery of the total heat exchange core 5 forms an assembly boundary with the inner wall of the housing 1, and the outer peripheral frame of the core 5 fits snugly with the internal partition structure.

[0031] like Figure 3 and Figure 4As shown, a partition 301 is provided inside the housing 1. The partition 301 is a plate-shaped partition, with its lower end connected to the base 302. The side edge of the partition 301 is attached to or fixedly connected to the inner wall of the housing 1. The partition 301 divides the internal space of the housing 1 into independent air duct spaces, so that the heat exchange channels corresponding to the total heat exchange core 5 are located on opposite sides of the core 5, while forming a bypass channel inside the housing 1 that bypasses the total heat exchange core 5. The partition 301 forms a diversion / convergence area near the upper part of the housing 1, so that the heat exchange channels and the bypass channels are arranged adjacent to each other in this area and form a corresponding opening relationship. Sealing strips, pressure strips, or flanged overlap structures are provided between the partition 301 and the inner wall of the housing 1, and between the partition 301 and the base 302, to form a continuous and fitted assembly boundary.

[0032] like Figure 3 and Figure 4 As shown, the fan assembly 201 is located in the upper part of the casing 1. The fan assembly 201 is fixed to a mounting plate or beam inside the casing 1, and its inlet and outlet correspond to the internal air duct space. An internal flow guide 103 is provided between the fan assembly 201 and the partition 301. The internal flow guide 103 is a plate-shaped or cover-shaped component, arranged opposite to the partition 301 and forming a flow guide gap therebetween. A transition space is formed between the internal flow guide 103 and the inner wall of the casing 1, creating a continuous structural transition area between the fan assembly 201 and the heat exchange channel and bypass channel. The internal flow guide 103 is installed inside the casing 1 or on the partition 301 by screw fixing or snap-fit ​​positioning, thus forming a stable relative positional relationship with the fan assembly 201 and the partition 301.

[0033] like Figure 3 and Figure 4 As shown, the bypass valve assembly 102 is arranged inside the upper part of the housing 1 and is located in the diversion / convergence area of ​​the heat exchange channel and the bypass channel. The bypass valve assembly 102 includes a valve body and a valve plate. The valve body is fixed to the partition 301 or the inner wall of the housing 1. The valve body is provided with a heat exchange port corresponding to the heat exchange channel and a bypass port corresponding to the bypass channel. The valve plate is disposed in the valve body and forms a sliding or rotating fit with the valve body. When the valve plate is in different positions, it forms a corresponding fit with the heat exchange port or the bypass port. The drive component of the bypass valve assembly 102 is disposed in the body of the bypass valve assembly 102 or in the electrical control component mounting box 4, and is connected to the valve plate through a connecting rod, drive shaft or connecting piece. The valve plate and the drive component are detachably connected.

[0034] like Figure 1 and Figure 2As shown, the electrical control component mounting box 4 is fixed to the side of the housing 1. The electrical control component mounting box 4 is connected to the inner cavity of the housing 1 through the wire harness hole, and a sealing ring or sealing gasket is provided at the wire harness hole. The electrical control component mounting box 4 is equipped with a control board, wiring terminals and driving devices. The wire harness in the electrical control component mounting box 4 is connected to the fan assembly 201 and the bypass valve assembly 102 respectively.

[0035] In the assembly relationship of this embodiment, such as Figure 3 and Figure 4 As shown, the base 302 is located at the bottom, and the total heat exchange core 5 is mounted on the base 302; the partition 301 connects to the base 302 from bottom to top and forms a fitting boundary with the inner wall of the casing 1; the fan assembly 201 is located at the top, and the internal flow guide 103 is located between the fan assembly 201 and the partition 301; the bypass valve assembly 102 is located in the upper diversion / convergence area and forms a fixed fit with the partition 301. The above structure allows for equivalent adjustments without changing the concept, such as changes in the shape of the air outlet, the number and installation method of the fans, the valve plate fit, and local arrangements, all of which are equivalent solutions of this utility model.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A total heat recovery fresh air blower with a bypass valve, comprising a housing (1), wherein a mounting structure (101) is provided on the housing (1), a first air outlet (2) and a second air outlet (3) are provided on the side of the housing (1), and a total heat exchange core (5) and a fan assembly (201) are provided inside the housing (1), characterized in that: The housing (1) is provided with a partition (301), which divides the interior of the housing (1) into a heat exchange air duct and a bypass air duct; The housing (1) is provided with a bypass valve assembly (102), which is arranged in the diversion / convergence area of ​​the heat exchange duct and the bypass duct.

2. The total heat recovery fresh air unit with bypass valve according to claim 1, characterized in that: The bypass valve assembly (102) includes a valve body, a valve plate, and a drive component. The valve plate is disposed within the valve body and is movable between a first position and a second position.

3. The total heat recovery fresh air unit with bypass valve according to claim 2, characterized in that: The valve body is provided with a heat exchange port communicating with the heat exchange duct and a bypass port communicating with the bypass duct; when the valve plate is in the first position, it blocks the bypass port and connects to the heat exchange port; when the valve plate is in the second position, it blocks the heat exchange port and connects to the bypass port.

4. The total heat recovery fresh air unit with bypass valve according to claim 1, characterized in that: The housing (1) is provided with a base (302), and the total heat exchange core (5) is installed on the base (302).

5. The total heat recovery fresh air unit with bypass valve according to claim 4, characterized in that: The partition (301) is connected to the base (302), and the lower end of the partition (301) forms an air duct boundary with the base (302).

6. The total heat recovery fresh air unit with bypass valve according to claim 1, characterized in that: The housing (1) is provided with an internal flow guide (103), which is located between the fan assembly (201) and the heat exchange air duct / bypass ventilation duct.

7. The total heat recovery fresh air unit with bypass valve according to claim 6, characterized in that: The internal flow guide (103) is a plate-shaped flow guide, which is arranged opposite to the partition (301) and forms a flow guide gap therebetween.

8. The total heat recovery fresh air unit with bypass valve according to claim 1, characterized in that: The fan assembly (201) is arranged in the upper region of the housing (1), and the total heat exchange core (5) is arranged in the lower middle region of the housing (1).

9. The total heat recovery fresh air unit with bypass valve according to claim 1, characterized in that: The casing (1) has an electrical control component mounting box (4) on its side. The electrical control component mounting box (4) contains a control board, a bypass valve actuator, and a fan drive module. The bypass valve actuator is connected to the bypass valve assembly (102).

10. The total heat recovery fresh air unit with bypass valve according to claim 1, characterized in that: The first air vent (2) and the second air vent (3) are respectively located on the upper and lower parts of the side of the housing (1).

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