CN212227323U - Ventilation device and ventilation system - Google Patents
Ventilation device and ventilation system Download PDFInfo
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- CN212227323U CN212227323U CN202021197119.XU CN202021197119U CN212227323U CN 212227323 U CN212227323 U CN 212227323U CN 202021197119 U CN202021197119 U CN 202021197119U CN 212227323 U CN212227323 U CN 212227323U
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Abstract
The utility model discloses a ventilation unit and ventilation system, this ventilation unit, include: a ventilator having two ports in an axial direction; a fan disposed in the ventilator to pass an airflow through the ventilator; a regenerator disposed in the ventilator for absorbing heat from the airflow; wherein: and a blocking part for blocking air flow is formed on the radial periphery of the fan, and the blocking part is used for enabling the flow section of the fan to be smaller than that of the heat regenerator. The utility model discloses a be less than the circulation cross-section of regenerator with the circulation cross-section setting of fan, and then make fan and regenerator can form reasonable pressure matching and velocity of flow and match.
Description
Technical Field
The utility model relates to a building ventilation technical field especially relates to a reciprocating type heat recovery ventilation unit.
Background
It is known that ventilating indoor can effectively reduce the content of carbon dioxide in the indoor, and further can improve the comfort of indoor personnel, however, the natural ventilation process may bring energy loss, for example, in winter, indoor hot air is directly discharged outdoors and outdoor cold air is directly introduced indoors, which inevitably increases the energy consumption of heating equipment; for another example, in summer, cold air in the room is directly discharged to the outside and hot air in the outside is directly introduced to the room, which increases the energy consumption of the cooling device.
In order to recover heat in air, for example, chinese patent application No. 201120515081.0 discloses a reciprocating heat recovery fresh air system which can be installed on an indoor and outdoor wall, and includes a cylindrical ventilator, a dc motor (actually, a fan) installed in the ventilator, and a heat accumulator installed on one side of the fan in the axial direction, wherein the fan operates to allow hot air to pass through the heat accumulator, the heat accumulator is used to absorb heat in the hot air, and the air having absorbed heat is discharged to the outside (in winter) or enters the inside (in summer) to recover heat in the air.
However, the above-mentioned reciprocating heat recovery fresh air system has the following disadvantages:
fan and heat accumulator all are full of the whole cross-section of ventilator, and the heat accumulation of heat accumulator, heat transfer capacity and flow resistance characteristic and axial fan's axial velocity of flow, pressure characteristic mismatch, and this causes both to mismatch in the aspect of allowing the air current to pass through, specifically do: since both the fan and the heat accumulator occupy the entire cross-section of the ventilator, they have the same flow cross-section for the air flow and therefore the same axial flow velocity. The axial air flow speed of the common axial flow fan is far more than 2 meters per second, and the full pressure is not more than 200 Pa; for a regenerator, for example, about 15 cm thick, a flow rate greater than 2 meters per second corresponds to a pressure differential much greater than 200 pa, while a flow rate less than 200 pa differential corresponds to a flow rate typically less than 0.5 meters per second. Therefore, in actual operation, the performance parameters of the axial flow fan and the heat accumulator can not be matched completely. Therefore, the efficiency of the ventilation system in operation is low, the ventilation volume is limited, and the ventilation system is not suitable for scenes with higher ventilation volume requirements.
In addition, the entire ventilation device is large in size in the axial direction.
Disclosure of Invention
To at least one of the above-mentioned technical problem that exists among the prior art, the utility model provides a ventilation unit and ventilation system.
The utility model adopts the technical proposal that:
a ventilation device, comprising:
a ventilator having two ports in an axial direction;
a fan disposed in the ventilator to pass an airflow through the ventilator;
a regenerator disposed in the ventilator for absorbing heat from the airflow; wherein:
and a blocking part for blocking air flow is formed on the radial periphery of the fan, and the blocking part is used for enabling the flow section of the fan to be smaller than that of the heat regenerator.
Preferably, a partition is arranged in the ventilator, and the fan is arranged in the partition and penetrates through the partition; wherein:
the partition plate on the periphery of the blower forms the blocking portion.
Preferably, the partition is arranged in the ventilator perpendicularly to the axial direction of the ventilator.
Preferably, the fan penetrates the partition in such a way that the axial direction of the fan coincides with the axial direction of the ventilator.
Preferably, the fan penetrates the partition in such a manner that the axial direction of the fan is perpendicular to the axial direction of the ventilator.
Preferably, the partition has two curved walls which expand in thickness, respectively, and together define a perforation which is perpendicular to the axial direction of the ventilator, and the fan extends through the perforation.
Preferably, the regenerator includes two regenerators, and the two regenerators are disposed on both sides of the fan in an axial direction of the ventilator.
Preferably, the first and second electrodes are formed of a metal,
the ventilator is in the shape of a polygonal frame
Or
The ventilator is cylindrical;
or
The ventilator is in an elliptical cylinder shape.
Preferably, the regenerator is a porous material formed of one or more selected from inorganic oxides, carbides, or metals, which is foamed, honeycomb-shaped, stacked with particles, or stacked with meshes.
Preferably, the fan is a reversible fan, and the blade profile of the impeller is S-shaped.
The utility model also discloses a ventilation system, including foretell ventilation unit.
Compared with the prior art, the utility model discloses a ventilation unit and ventilation system's beneficial effect is:
the utility model discloses a set up the circulation cross-section of fan and must be less than the circulation cross-section of regenerator for fan and regenerator can form reasonable pressure matching and velocity of flow and match.
Through making fan and regenerator can form reasonable pressure matching and velocity of flow and match, ventilation system's air volume no longer receives the restriction, can select different fan and regenerator to rationally match according to the demand, can also guarantee that whole ventilation system moves with very high efficiency all the time.
The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the inventive embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
Fig. 1 is an exploded perspective view of a ventilation device according to an embodiment of the present invention.
Fig. 2 is a perspective assembly view of a ventilation device according to an embodiment of the present invention.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is an airflow streamline effect diagram of the ventilation device according to the embodiment of the present invention.
Reference numerals:
10-a ventilator; 20-a fan; 30-a heat regenerator; 40-a separator; 41-arc wall; 42-punching; 50-a grid.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the clarity and conciseness of the following description of the present invention, detailed descriptions of known functions and known components are omitted.
The utility model discloses a ventilation unit, this ventilation unit belong to mechanical ventilation unit, and this ventilation unit is used for setting up on indoor and outdoor handing-over wall, for example, sets up on the wall of building or window wall.
As shown in fig. 1 to 4, the ventilation apparatus includes: a ventilator 10, a fan 20, and a regenerator 30.
The shape of the ventilator 10 is not limited in any way and can be of various configurations, such as a polygonal frame-like configuration for the ventilator 10, a quadrangular frame-like configuration for the ventilator 10 as shown in FIG. 1, and a cylindrical configuration for the ventilator 10 having a circular cross-section, or a cylindrical configuration for the ventilator 10 having an elliptical cross-section, for example. As will be readily appreciated, the ventilator 10 has two ports in the axial direction by which airflow passes through the ventilator 10.
It should be noted that: by axial direction of the ventilator 10 is meant the direction in which the axis of the ventilator 10 is directed, and by axis of the ventilator 10 is meant the direction in which the ventilator 10 extends, the axis extending perpendicularly through both ports of the ventilator 10.
The regenerator 30 is used to absorb heat in the air flow, and the regenerator 30 is disposed in the ventilator 10. The regenerator 30 may be disposed on only one side of the ventilator 10 in the axial direction, or may be disposed on both sides of the ventilator 10, as desired. On each side of the ventilator 10, a regenerator 30 may be provided on a portion of the cross-section of the ventilator 10 in the axial direction. For example, in a case where the temperature difference between the outdoor and indoor temperatures is not large, a regenerator may be provided in a part of the cross section of the ventilator 10 in the axial direction, and a regenerator may not be provided in another part of the cross section.
The thermal regenerator 30 may be arranged to fill the entire cross-section of the ventilator 10 in the axial direction such that the flow cross-section of the thermal regenerator 30 through which the air flow is allowed is equal to the flow cross-section of the ventilator 10 through which the air flow is allowed, such that the air flow flowing through the ventilator 10 not only flows entirely through the thermal regenerator 30, but also flows through the thermal regenerator 30 over the entire flow cross-section of the ventilator 10.
A fan 20 is disposed in the ventilator 10, the fan 20 circulates indoor and outdoor air by causing the air flow to pass through the ventilator 10, the air flow passes through a heat regenerator 30 at a certain flow rate by the fan 20, and the heat regenerator 30 recovers heat from the air flow. For example, when the fan 20 is operated in an environment where the outdoor temperature is higher than the indoor temperature, the external (outdoor) hot air enters the ventilator 10 and flows through the heat regenerator 30, the heat regenerator 30 absorbs heat in the air flow, and the air flow with the absorbed heat enters the indoor space at a lower temperature, so that the load of the refrigeration equipment for maintaining the indoor low temperature can be reduced, and the absorbed heat can be used for other purposes. For another example, when the fan 20 is operated in an environment where the outdoor temperature is lower than the indoor temperature, indoor hot air enters the ventilator 10 and flows through the heat regenerator 30, the heat regenerator 30 absorbs heat from the air flow, the air flow with the absorbed heat is discharged to the outdoor at a lower temperature, and the heat absorbed by the heat regenerator 30 can be used for heating the indoor air or for other purposes.
In the present invention, it is particularly critical that: the radially outer periphery of the fan 20 is formed with a barrier portion for blocking the passage of air flow so that air flow can only pass through the fan 20, and the barrier portion occupies a part of the cross section of the ventilator 10 so that the flow cross section of the fan 20 that allows air flow is smaller than the flow cross section of the regenerator 30 that allows air flow.
The utility model discloses a setting is used for preventing the separation portion that the air current passes through, sets the circulation cross-section of fan 20 to being less than regenerator 30's circulation cross-section, and then makes fan 20 and regenerator 30 can form reasonable pressure matching and velocity of flow and match.
There is no particular limitation in the blocking portion for setting the flow cross section of the fan 20 to be smaller than that of the regenerator 30, and in some preferred embodiments, as shown in fig. 1 and 3, the blocking portion is formed at the periphery of the fan 20 by providing a partition 40 in the ventilator 10, specifically, the partition 40 occupies the entire cross section of the ventilator 10, the fan 20 is provided on the partition 40 in such a manner as to penetrate the partition 40, the partition 40 at the periphery of the fan 20 serves as the blocking portion, and the air flow can flow from one side of the partition 40 to the other side only by the fan 20.
Preferably, the partition 40 is disposed in the ventilator 10 in a manner perpendicular to the axial direction of the ventilator 10, which minimizes the space occupied by the partition 40 in the axial direction of the ventilator 10. The term "perpendicular" as used herein means that the partition 40 forms an angle of approximately 90 degrees with the axial direction of the ventilator 10, for example, 80 to 90 degrees, preferably 85 to 90 degrees.
Examples of the manner in which the fan 20 penetrates the partition 40 include:
in a first way, the axial direction of the fan 20 is aligned with the axial direction of the ventilator 10 (not shown in the drawings). The term "substantially coincident" is not strictly limited to an angle of 0 degrees formed between the axial direction of the fan 20 and the axial direction of the ventilator 10, as long as the axial direction of the fan 20 is substantially coincident with the axial direction of the ventilator 10, for example, the angle formed between the axial direction of the fan 20 and the axial direction of the ventilator 10 is about 0 to 10 degrees, and further may be about 0 to 5 degrees, for example.
In a second mode, as shown in fig. 1 and 3, the axial direction of the fan 20 is perpendicular to the axial direction of the ventilator 10, and the axial direction of the fan 20 is parallel to the plane of the partition 40, specifically, the middle part of the partition 40 is formed into arc-shaped walls 41 respectively expanding towards two sides in the axial direction, the two arc-shaped walls 41 together define a perforation 42, the fan 20 penetrates through the perforation 42, and the arc-shaped walls 41 cover the fan 20. The aforementioned "perpendicular" is not limited to a strict "90 degrees", and the angle formed by the axial direction of the fan 20 and the axial direction of the ventilator 10 may be, for example, 80 to 90 degrees, and preferably 85 to 90 degrees.
In addition, the angle formed by the axial direction of the fan 20 and the axial direction of the ventilator 10 may be other angles, for example, 15 to 70 degrees, and is not particularly limited.
Preferably, the second mode of the blower 20 penetrating the partition 40 has the following advantages:
compared with the first mode perpendicular to the partition plate, the second mode can better control the axial thickness of the ventilator, and the reversible fan 20 and the heat regenerator 30 are more flexibly matched.
In particular, in the case where the fan 20 is a fan 20 having a relatively large axial dimension, the second mode can reduce the axial dimension of the ventilator 10 occupied by the fan 20, and thus can allow the axial dimension of the ventilator 10 to be set smaller.
There is no limitation on the material of the regenerator 30, and a person skilled in the art may appropriately select the material as long as the purpose of the regeneration can be achieved. Regenerator 30 can be, for example, a porous material. By using the porous material, the heat utilization efficiency can be further improved. As such a porous material, for example, a porous material in a foam shape, a honeycomb shape, a particle stack, or a mesh stack may be cited, and as the porous material, one or more selected from inorganic oxides, carbides, or metals may be formed, such as a general ceramic material, cast iron, and a metal material, or a composite phase change material.
The regenerator 30 may be disposed along only one side of the ventilator 10 or may be disposed along both sides of the ventilator 10. In some preferred embodiments, the regenerators 30 are disposed on each side of the fan 20 along the ventilator 10. The proportion of the area of the thermal regenerator 30 disposed on each side of the ventilator 10 to the cross-section of the ventilator 10 is not particularly limited, and may occupy only a portion of the cross-section of the ventilator 10, or may fill the cross-section of the ventilator 10. The regenerator 30 is preferably arranged to fill the entire cross-section of the ventilator 10 in the axial direction, so that the air flow flows through the regenerator 30 over the entire flow cross-section of the ventilator 10.
When the heat regenerator 30 is provided on both sides of the ventilator 10, the fan 20 may be configured as a reversible fan capable of changing the rotation direction, so that the air flow can be bidirectionally moved from the indoor to the outdoor and from the outdoor to the indoor.
The fan 20 is a reversible fan. In order to improve the efficiency of the fan 20, the blade profile of the impeller blade may be an S-shape, and the upstream and downstream of the axial flow impeller may be provided with front and rear guide blades of a fully symmetrical airfoil shape with a mounting angle of 90 °.
In some preferred embodiments, a grill 50 is provided at each of two axial ports of the ventilator 10, and the grill 50 has a limiting function for the regenerator 30 and also has a rainproof function.
The following describes a specific embodiment of the ventilation device provided by the present invention.
In the ventilation device: the regenerators 30 are arranged on both sides of the ventilator 10, and each regenerator 30 on each side is formed by splicing 4 honeycomb ceramic materials of 0.2 m × 0.075 m, and the airflow circulation area is 0.16 square meter. The porosity of the honeycomb ceramic was 0.75 and the pore size was about 3.5 mm. The outer diameter of the fan 20 is 18 cm, the axial length is 8 cm, the design point rotating speed is 3600 rpm, the flow is 120 cubic meters per hour, and the pressure is 100 Pa. The ventilator 10 has dimensions of 0.41 by 0.36 m. The axial velocity of the air flow through the fan 20 was about 2.0 meters per second, and about 0.20 meters per second was passed through a regenerator 30 having a thickness of 0.15 meters (2 sections of regenerator, total thickness 2 x 0.075 meters, equal to 0.15 meters), with a total pressure loss of 100 Pa. As shown in fig. 4, the air flow passes through the regenerator 30 at a superficial velocity of 0.20 meters per second, converges at the inlet of the fan 20 on one side of the partition 40, passes through the fan 20 at an average velocity of about 3.0 meters per second, is pressurized at 100Pa, and then passes through the regenerator 30 on the other side at 0.20 meters per second. The reversible fan 20 runs periodically in a forward rotation mode for 1 minute and a reverse rotation mode for 1 minute, 120 cubic meters of fresh air per hour can be provided indoors, and energy is saved by 70-90%. The ventilation devices of the scheme are used in pairs, and are particularly suitable for classrooms of primary and secondary schools.
The ventilation device can be used for example for classroom ventilation. One window can be respectively arranged on the front window and the rear window of a classroom and can run simultaneously. Furthermore, the running direction of the fan in the ventilation device arranged in front of and behind the classroom can be set according to the requirement. For example, one fan may be arranged to rotate in a forward direction to cause air flow from the outside to the inside of the room, while the other fan rotates in a reverse direction to cause air flow from the inside of the room to the outside of the room.
The utility model also discloses a ventilation system, this ventilation system includes foretell ventilation unit, still includes: the system comprises a sensor which is installed indoors and used for measuring temperature, a sensor which is installed indoors and used for measuring carbon dioxide content and a sensor used for detecting PM2.5, and the system controls the operation timing and the rotating speed of the fan 20 based on the detection results of the sensors so as to adjust the indoor air environment.
Moreover, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or variations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. Additionally, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (11)
1. A ventilation device, comprising:
a ventilator having two ports in an axial direction;
a fan disposed in the ventilator to pass an airflow through the ventilator;
a regenerator disposed in the ventilator for absorbing heat from the airflow; wherein:
and a blocking part for blocking air flow is formed on the radial periphery of the fan, and the blocking part is used for enabling the flow section of the fan to be smaller than that of the heat regenerator.
2. A ventilating device according to claim 1, wherein a partition is provided in the ventilator, and the fan is provided in and through the partition; wherein:
the partition plate on the periphery of the blower forms the blocking portion.
3. A ventilation device according to claim 2, wherein the partition is provided in the ventilator perpendicularly to the axial direction of the ventilator.
4. A ventilation device according to claim 3, wherein the fan extends through the partition in such a way that its axial direction coincides with the axial direction of the ventilator.
5. A ventilation device according to claim 3, wherein the fan extends through the partition in a manner such that its axial direction is perpendicular to the axial direction of the ventilator.
6. A ventilating device according to claim 5, wherein the partition has two curved walls which expand in thickness, respectively, and which together define a through-hole perpendicular to the axial direction of the ventilator, the fan extending through the through-hole.
7. A ventilation apparatus according to claim 1, wherein the regenerator includes two, and the two regenerators are disposed on both sides of the fan in an axial direction of the ventilator.
8. A ventilation device according to claim 1,
the ventilator is in the shape of a polygonal frame
Or
The ventilator is cylindrical;
or
The ventilator is in an elliptical cylinder shape.
9. The ventilation apparatus of claim 1, wherein the regenerator is a porous material formed of one or more selected from inorganic oxides, carbides or metals, in a foam shape, a honeycomb shape, a particle stack, or a wire mesh stack.
10. A ventilating device according to claim 1, wherein the fan is a reversible fan, and the blades of the fan are S-shaped.
11. A ventilation system, characterized by comprising a ventilation device according to any one of claims 1 to 10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021197119.XU CN212227323U (en) | 2020-06-24 | 2020-06-24 | Ventilation device and ventilation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021197119.XU CN212227323U (en) | 2020-06-24 | 2020-06-24 | Ventilation device and ventilation system |
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| CN212227323U true CN212227323U (en) | 2020-12-25 |
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| CN202021197119.XU Active CN212227323U (en) | 2020-06-24 | 2020-06-24 | Ventilation device and ventilation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594968A (en) * | 2020-06-24 | 2020-08-28 | 北京岳道科技有限公司 | Ventilation device and ventilation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594968A (en) * | 2020-06-24 | 2020-08-28 | 北京岳道科技有限公司 | Ventilation device and ventilation system |
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