CN114562782A - Heat exchange unit and ventilation device - Google Patents

Abstract

The invention provides a heat exchange unit and a ventilation device. The heat exchange unit comprises a fixed frame body provided with at least one group of ventilation openings; and a heat exchange element rotatably disposed in the fixed frame and forming at least one heat exchange air passage therein independently of each other, the heat exchange element selectively communicating the heat exchange air passage with the vent group by rotation. This heat exchange unit on the one hand does not need extra heating element, and on the other hand also need not to stop to trade wind to can prevent effectively that heat exchange element from producing dewing and frosting, with the comfort level that effectively improves the user and save manufacturing cost, have economic benefits and market competition.

Description

Heat exchange unit and ventilation device

Technical Field

The present invention relates to the field of electric appliances, and more particularly, to a heat exchange unit and a ventilation device including the same.

Background

As shown in fig. 1, chinese patent CN200510056824.1 discloses an air heat exchange device 1 implemented by the conventional technology, the air heat exchange device 1 is provided with: a casing 11, an indoor side air inlet 12, an outdoor side air inlet 13, an indoor side air outlet 14, an outdoor side air outlet 15, a fan 16 and a heat exchange part 17. Driven by the fan 16, outdoor air passes through the outdoor air inlet 13, the heat exchange part 17 and the indoor air outlet 14 in sequence and then enters the room (referred to as inlet airflow); on the other hand, the indoor air passes through the indoor air inlet 12, the heat exchanger 17, and the outdoor air outlet 15 in this order, and is discharged to the outside (referred to as "exhaust air flow"). The intake air flow and the exhaust air flow perform heat exchange with each other in the heat exchange portion to reduce heat loss generated during ventilation.

In the conventional air heat exchanger 1, the heat exchanger 17 is usually fixedly mounted inside the casing 11. When the outdoor temperature is cold and the indoor temperature is warm, and cold inlet air flows pass through the heat exchange part 17, because the temperature and the humidity of the cold inlet air flow are greatly different from those of warm exhaust air flow, water drops are easily formed on the surface of the heat exchange part 17 and part of water vapor around the surface of the heat exchange part, and the water drops are inconvenient for users after flowing out of the device; alternatively, the moisture is easily formed into frost attached to the surface of the heat exchange portion 17, and the air passage of the heat exchange portion 17 is blocked, thereby reducing the ventilation efficiency and the heat exchange effect. Therefore, in order to solve this problem, the conventional technology may mount a heater in the air heat exchanger 1 to raise the temperature of the intake air flow, or switch to the internal circulation mode for a certain period of time, that is, without introducing outdoor air. Thereby preventing or eliminating water droplets and frost of the heat exchange portion 17.

However, the installation of the heater requires an increase in the cost of the air heat exchanger 1, and the switching to the internal circulation mode for a certain period of time may cause suspension of the indoor/outdoor air exchange, which may affect the indoor ventilation effect.

Disclosure of Invention

Technical problem to be solved

The invention provides a heat exchange unit and a ventilation device comprising the same, which do not need an additional heating element and can effectively prevent the heat exchange element from generating dewing or frosting under the condition of ensuring the fresh air introduction quantity so as to solve the technical problems in the prior art.

(II) technical scheme

In order to solve the above technical problem, in one aspect, the present invention provides a heat exchange unit comprising: the fixed frame body is provided with at least one group of ventilation openings; and a heat exchange element rotatably disposed in the fixed frame and forming at least one heat exchange air passage therein independently of each other, the heat exchange element selectively communicating the heat exchange air passage with the vent group by rotation.

According to one embodiment, the heat exchange unit further comprises: the movable component is fixedly connected with the heat exchange element and is rotatably arranged in the fixed frame body; and a driving motor connected to the movable member to drive the movable member to rotate.

According to one embodiment, a heat exchange element comprises: the heat exchanger comprises two heat exchange bottom surfaces which are arranged opposite to each other, a plurality of heat exchange side surfaces which are arranged by being clamped by the two heat exchange bottom surfaces, and at least one heat exchange side surface of the plurality of heat exchange side surfaces is matched with each other to correspond to at least one heat exchange air path, wherein the two matched heat exchange side surfaces are provided with heat exchange openings communicated with the corresponding heat exchange air paths.

According to one embodiment, the movable member comprises: a connection part for fixedly supporting the heat exchange bottom surface of the heat exchange element; the fitting part extends from the edge of the connection part along the direction parallel to the edge formed by intersecting the adjacent heat exchange side surfaces so as to be detachably fitted with the edge; and a motor connecting part formed on the connection part and connected with a rotating shaft of the driving motor.

According to one embodiment, the fitting part is in the shape of a strip plate, and a fitting groove is formed on the inner side of the fitting part facing the edge, wherein the fitting groove and the edge are fitted with each other, and the cross-sectional shape of the fitting groove is the same as the cross-sectional shape of the corner where the edge is located.

According to one embodiment, the number of the engagement portions is the same as the number of the edges.

According to one embodiment, the connection portion is formed in a circular flat plate shape covering the heat exchange bottom surface.

According to one embodiment, the connection is provided with a positioning rib projecting inwardly from an inner side of the connection facing the heat exchange element, wherein the surrounding of the positioning rib forms the same shape as the heat exchange bottom surface.

According to one embodiment, the joint is provided with a bead projecting outwardly from an outer side of the joint opposite to an inner side of the joint, wherein the bead extends between the motor connection and the engagement.

According to one embodiment, the heat exchange element is commonly engaged by two engaging portions from opposite ends of the heat exchange element, respectively.

According to one embodiment, the fixing frame includes: two fixed frame bottom surfaces which are arranged opposite to each other and are formed into a circular shape; and a side surface of the fixed frame body, which is formed into a closed curved surface formed by the bottom surfaces of the two fixed frame bodies, wherein the ventilation opening group comprises two ventilation openings oppositely arranged on the side surface of the fixed frame body.

According to one embodiment, the driving motor is fixedly installed at the center of the bottom surface of the fixed frame body and the rotating shaft of the driving motor passes through the center of the bottom surface of the fixed frame body.

According to one embodiment, the inner side of the fixed frame body is provided with airtight protection strips, which are located between the vent groups.

According to one embodiment, the heat exchange element is formed in a quadrangular prism shape and includes a first heat exchange air passage and a second heat exchange air passage independent of each other, and the vent group includes a first vent group communicating with the first heat exchange air passage and a second vent group communicating with the second heat exchange air passage.

Another aspect of the present invention provides a ventilation apparatus, comprising: the shell is provided with an outdoor air inlet, an outdoor air outlet, an indoor air inlet and an indoor air outlet; a fan driving air flow in the housing; and a heat exchange unit disposed in the housing and configured to exchange heat with air flowing through the housing, wherein the heat exchange unit is the heat exchange unit.

According to one embodiment, the heat exchange unit is provided with a protruding piece; and a fixing groove engaged with the protrusion piece is provided on the case, wherein the heat exchange unit is fixed to the case by the engagement of the protrusion piece with the fixing groove.

According to one embodiment, the outdoor side air intake and the indoor side air outlet are paired to correspond to one of the at least one set of vent sets; and the indoor side air inlet and the outdoor side air outlet are paired to correspond to another set of the at least one set of vents.

(III) advantageous effects

According to the technical scheme of the invention, the heat exchange element is rotatably arranged in the fixed frame body, and the heat exchange air passage in the heat exchange element can be selectively communicated with the external vent group through rotation. When the temperature of the heat exchange element is not uniform due to large temperature difference between different external vent groups, the heat exchange element is rotated to selectively communicate the heat exchange air path inside the heat exchange element with the external vent groups, thereby reducing the temperature difference inside the heat exchange element. On the one hand, do not need extra heating element, on the other hand, also need not to stop to trade wind to can prevent effectively that heat exchange element from producing dewfall and frosting, with effectively improving user's comfort level and saving manufacturing cost, have economic benefits and market competition.

Drawings

FIG. 1 is a schematic structural view of a hot air heat exchange device according to the prior art;

fig. 2 is a schematic view of the structure of the ventilating device according to the present invention;

FIG. 3 is a schematic view of the construction of a heat exchange unit according to the present invention;

FIG. 4 is an exploded view of the heat exchange unit according to FIG. 3;

FIG. 5 is a schematic view of the structure and air flow of a heat exchange element according to the present invention;

FIG. 6 is a schematic view of a movable member according to the present invention, viewed from one direction;

FIG. 7 is a schematic view of a movable member according to the present invention, viewed from another direction;

fig. 8 is a schematic structural view of a fixing frame according to the present invention;

FIG. 9 is a schematic cross-sectional view of the heat exchange unit taken along line D-D' of FIG. 2 and the heat exchange element rotated before and after;

fig. 10 is a schematic view of an air path of the ventilating device according to the present invention;

fig. 11 is a schematic view of the tuyere of the air exchanging device in accordance with fig. 10 after the heat exchange element is rotated clockwise by 90 °.

The reference numbers in the drawings are as follows:

< Prior Art >

1: an air heat exchange device; 11: a housing; 12: an indoor side air inlet; 13: an outdoor side air inlet; 14: an indoor air outlet; 15: an outdoor side air outlet; 16: a fan; 17: a heat exchange section.

< present invention >

10: a ventilation device; 100: a housing; 101: an indoor side air inlet; 102: an outdoor side air outlet; 103: an outdoor side air inlet; 104: an indoor air outlet; 110: a rear side; 120: a left side surface; 130: an upper side surface; 200: a heat exchange unit; 210: fixing the frame body; 220: a heat exchange element; 230: a movable member; 240: a drive motor; 250: an airtight protective strip; 2010: a heat exchange bottom surface; 2011: a first heat exchange bottom surface; 2012: a second heat exchange bottom surface; 2020: a heat exchange side; 2021: a first heat exchange side; 2022: a second heat exchange side; 2023: a third heat exchange side; 2024: a fourth heat exchange side; 2030: an edge; 2031: a first edge; 2032: a second edge; 2033: a third edge; 2034: a fourth edge; 2040: a heat exchange port; 2050: a heat exchange air passage; 2051: a first heat exchange air passage; 2052: a second heat exchange air passage; 3010: a connecting part; 3020: a fitting part; 3110: the inner side surface of the connection part; 3210: an outer side surface of the connection portion; 3120: the inner side surface of the conjunction part; 3220: an outer side surface of the fitting part; 3021: a first fitting part; 3022: a second fitting portion; 3023: a third fitting part; 3024: a fourth engagement portion; 3025: a fitting groove; 3025-1: a slotted vane; 3030: a motor connecting part; 3040: positioning ribs; 3041: a first positioning rib; 3042: a second positioning rib; 3043: a third positioning rib; 3044: a fourth positioning rib; 3050: reinforcing ribs; 1010: a fixed frame bottom surface; 1020: fixing the side surface of the frame; 1030: a set of vents; 1031: a first air vent; 1032: a second vent; 1033: a third vent; 1034: a fourth vent; 1040: a motor hole; 1050: a motor fixing part; 1060: a vent gap; 310: a projecting piece; 320: fixing grooves; 1000: an air inlet passage; 2000: an exhaust air passage; 300: a fan.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Additionally, the described embodiments are only some embodiments, and not all embodiments, of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The terms "first," "second," and the like, are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance.

To clearly explain the technical contents and effects of the present disclosure, the present disclosure will be described in detail below with reference to the detailed description and the accompanying drawings. In addition, the following embodiment is only one of specific examples of the present disclosure, and does not limit the technical scope of the present disclosure.

In the drawings, the second description of the same reference numerals for the same components and the description of the components not directly related to the present disclosure will be omitted or simplified. In the following description, directional terms such as up, down, left, right, upper, lower, etc., are described with reference to the drawings in the present disclosure.

Hereinafter, a heat exchange unit and a ventilation apparatus including the same according to the present invention will be described in detail with reference to the accompanying drawings.

First, the overall ventilation apparatus of the present invention will be described with reference to fig. 2. Fig. 2 is a schematic view of the structure of the ventilating device according to the present invention.

The ventilator 10 of the present invention may be applied to a general household ventilator, and may be directly placed on a wall or placed on the floor, or may be placed in a storage space such as above a ceiling or below the floor, and connected to a ventilation duct to replace indoor and outdoor air in an indoor space. Meanwhile, a heat exchange unit 200 for recovering heat energy of air is further provided in the ventilator 10 to adjust the temperature and humidity of air supplied to the room. Besides, the ventilation device 10 may also include other regulating units for performing the regulating functions of dehumidification, humidification, disinfection, etc. on the air.

The ventilation device 10 includes: a casing 100, a fan 300, and a heat exchange unit 200.

The casing 100 forms a housing of the ventilation apparatus 10 and has a three-dimensional box-shaped structure formed by surrounding six surfaces. Specifically, the case 100 is formed in a rectangular parallelepiped structure formed of six planes. Specifically, the housing 100 includes an outdoor air inlet 103, an indoor air inlet 101, an outdoor air outlet 102, and an indoor air outlet 104 disposed on the housing 100.

The outdoor side air inlet 103 is an opening provided in the casing 100 for allowing air in the outdoor space outside the casing 100 to enter the inside of the casing 100, and is located on one of six surfaces forming the casing 100, for example, the rear surface 110 of the casing 100 in the present embodiment.

The indoor-side air inlet 101 is an opening provided in the casing 100, for allowing air in an indoor space outside the casing 100 to enter the inside of the casing 100, and is located on one of six surfaces forming the casing 100, for example, on the left side surface 120 of the casing 100 in the present embodiment.

The outdoor air outlet 102 is an opening provided in the casing 100 for discharging air inside the casing 100 into an outdoor space outside the casing 100, and is located on one of six faces forming the casing 100, for example, on the rear side 110 of the casing 100 in the present embodiment (shielded by a blower in fig. 1).

The indoor side outlet 104 is an opening provided in the casing 100 for discharging air inside the casing 100 into an indoor space outside the casing 100, and is located on one of six surfaces forming the casing 100, for example, on the upper side surface 130 of the casing 100 in the present embodiment.

The number, the position relationship, the arrangement structure, etc. of the indoor side air outlet 104 and the outdoor side air outlet 102, and the indoor side air inlet 101 and the outdoor side air inlet 103 are not limited to these, and those skilled in the art can design and adjust the indoor side air outlet and the outdoor side air inlet as required.

The fan 300 is located inside the casing 100 for driving the air flow inside the casing 100, and in the embodiment of the present invention, is a sirocco multi-blade centrifugal fan. As shown in fig. 2, two fans are disposed in the casing 100, respectively at the downstream side of the air flow near the air inlet for sucking air and at the upstream side of the air flow near the air outlet for discharging air. The number, the position relation and the arrangement structure of the fans are not limited to the above, and the fans can be designed and adjusted according to needs. Additionally, according to other embodiments of the present invention, the fan may be provided outside the housing.

The heat exchange unit 200 is located inside the case 100 for heat (and humidity) transfer of the air itself. Specifically, when the temperatures of the indoor air and the outdoor air are greatly different from each other, the air passes through the heat exchange unit 200, and the indoor air and the outdoor air can be subjected to energy transfer, such as warm indoor air transferring the temperature thereof to cold outdoor air, and the temperature of the outdoor air is increased and then discharged to the indoor space, thereby achieving the effects of improving the comfort of the user, saving energy, and the like. The heat exchange unit 200 according to the present invention is a rotary type heat exchange unit.

Next, the overall structure of the heat exchange unit will be described by referring to fig. 3 and 4.

FIG. 3 is a schematic view of the construction of a heat exchange unit according to the present invention; fig. 4 is an exploded view of the structure of the heat exchange unit according to fig. 3.

The heat exchange unit 200 includes a driving motor 240, a heat exchange element 220, a movable member 230, a fixed frame 210, and an airtight protection bar 250.

The driving motor 240 provides kinetic energy to the heat exchange unit 200 by turning on the power and finally rotates the heat exchange element 220 (described in detail below). The driving motor 240 is provided with a rotating shaft extending outwards from the inside.

The fixing frame 210 is provided with at least one set of vent holes 1030. The heat exchange element 220 is rotatably disposed in the fixed frame 210 and at least one heat exchange air path 2050 independent from each other is formed inside the heat exchange element 220. The heat exchange element 220 selectively communicates the inner heat exchange air path 2050 with the vent group 1030 by rotation.

Specifically, the heat exchange element 220 is rotatably fixed into the fixed frame 210 by the movable member 230. For example, the movable member 230 is fixedly connected with the heat exchange element 220 and the movable member 230 is rotatably disposed within the fixed frame 210.

The movable member 230 is connected to a driving motor 240, and the driving motor 240 drives the movable member 230 to rotate with respect to the fixed frame 210. The movable member 230 is fixedly connected with the heat exchange element 220 such that the movable member 230 rotates to drive the heat exchange element 220 to rotate relative to the fixed frame 210. The heat exchange element 220 rotates to selectively communicate the heat exchange air passage 2050 inside the heat exchange element 220 with the vent group 1030 provided in the fixed frame 210.

Next, the heat exchange element 220 will be explained with reference to fig. 5. Fig. 5 is a schematic view of the structure and air flow of a heat exchange element according to the present invention.

The heat exchange element 220 is a total heat exchange element having a laminated structure applied to the fields of ventilation, air conditioning, and the like. Specifically, for example, a basic structural member formed by laminating a planar dividing member and a sectional wave-shaped spacer member is formed by laminating and bonding the planar dividing member and the sectional wave-shaped spacer member so that the wave directions of the spacer members are orthogonal to each other or intersect at an angle close thereto. In the passages adjacent in the stacking direction formed by the space holding members of the total heat exchange element, sensible heat and latent heat are exchanged between the two fluids by flowing air flows in different states (usually, different air in a temperature and humidity state) through the dividing members as media.

The heat exchange element 220 according to the present embodiment includes: two heat exchange bottom surfaces 2010 disposed opposite to each other; and a plurality of heat exchange side surfaces 2020 sandwiching the two heat exchange bottom surfaces 2010, and at least two of the plurality of heat exchange side surfaces 2020 are paired with each other to correspond to at least one heat exchange air passage.

Specifically, the heat exchange element 220 according to the present embodiment is provided in a quadrangular prism shape, that is, six surfaces are provided in total, and respectively: a first heat exchange side surface 2021, a second heat exchange side surface 2022, a third heat exchange side surface 2023, a fourth heat exchange side surface 2024, a first heat exchange bottom surface 2011 and a second heat exchange bottom surface 2012.

The first heat exchange side 2021 and the third heat exchange side 2023 are two opposite sides of the heat exchange element 220 with the same size, and the two sides are communicated to form a first heat exchange air path 2051. The first heat exchanging side 2021 and the third heat exchanging side 2023 are covered with the heat exchanging openings 2040, which are formed by laminating and are communicated with each other, and the heat exchanging openings 2040 through which air enters and exits each other form a first heat exchanging air passage 2051 formed by the communication of the first heat exchanging side 2021 and the third heat exchanging side 2023.

Similarly, the second heat exchange side 2022 and the fourth heat exchange side 2024 are two opposite sides of the heat exchange element 220 with the same size, and the two sides are communicated to form a second heat exchange air path 2052. The second heat exchange side surface 2022 and the fourth heat exchange side surface 2024 are covered with the heat exchange ports 2040, which are the wave-shaped openings formed by the stacked layers and communicate with each other, and the heat exchange ports 2040 through which air enters and exits communicate with each other form the second heat exchange air passage 2052 formed by the communication between the second heat exchange side surface 2022 and the fourth heat exchange side surface 2024. In other words, according to the heat exchange element 220 of the present embodiment, the first heat exchange side 2021, the second heat exchange side 2022, the third heat exchange side 2023 and the fourth heat exchange side 2024 are sequentially connected to each other, the first heat exchange side 2021 is opposite to the third heat exchange side 2023, and the second heat exchange side 2022 is opposite to the fourth heat exchange side 2024. The first heat-exchange air path 2051 formed by the first heat-exchange side 2021 and the third heat-exchange side 2023 facing each other is independent from the second heat-exchange air path 2052 formed by the second heat-exchange side 2022 and the fourth heat-exchange side 2024 facing each other. Air can enter the first heat exchange air path 2051 through the heat exchange port 2040 on the first heat exchange side surface 2021 and be discharged through the heat exchange port 2040 on the third heat exchange side surface 2023; further, air can enter the second heat-exchange air passage 2052 through the heat-exchange port 2040 on the second heat-exchange side surface 2022 and be discharged through the heat-exchange port 2040 on the fourth heat-exchange side surface 2024, and the air can be heat-exchanged between the first heat-exchange air passage 2051 and the second heat-exchange air passage 2052.

In addition, heat exchange side 2020 intersects to form a plurality of edges 2030. Specifically, the first heat exchange side 2021 and the second heat exchange side 2022 intersect to form a first edge 2031; the second heat exchange side 2022 intersects the third heat exchange side 2023 to form a second edge 2032; the third heat exchange side surface 2023 and the fourth heat exchange side surface 2024 intersect to form a third square edge 2033; the fourth heat exchanging side 2024 and the first heat exchanging side 2021 intersect to form a fourth edge 2034.

The first heat exchange bottom 2011 and the second heat exchange bottom 2012 are two opposite side surfaces of the heat exchange element 220, and have the same size, and are disposed at upper and lower sides thereof to be connected to edges of the first heat exchange side surface 2021 and the second heat exchange side surface 2022, and the third heat exchange side surface 2023 and the fourth heat exchange side surface 2024. The first heat exchange bottom 2011 and the second heat exchange bottom 2012 are planes not to be ventilated.

Next, the movable member will be described with reference to fig. 6 and 7. Fig. 6 is a schematic structural view of a movable member according to the present invention, viewed from one direction, and fig. 7 is a schematic structural view of a movable member according to the present invention, viewed from another direction.

The movable member 230 is driven by the driving motor 240 by connecting the driving motor 240 and the heat exchange element 220, and the movable member 230 includes: a motor connector 3030, a connection 3010, and a fitting 3020.

Specifically, the movable member 230 includes: a connection portion 3010 for fixedly supporting the heat exchange bottom surface 2010 of the heat exchange element 220; a fitting portion 3020 extending from an edge of the connection portion 3010 in a direction parallel to the edge 2030 of the heat exchange element 220 to be detachably fitted with the edge 2030; and a motor connecting part 3030 formed at the connection part 3010 and connected to the rotation shaft of the driving motor 240.

The motor connector 3030 is configured to be connected to a rotating shaft of the driving motor 240, so as to be rotated by the driving motor 240. For example, in the present embodiment, the motor connector 3030 is configured as a hole structure into which the rotating shaft of the driving motor 240 is inserted, and the rotating shaft of the driving motor 240 and the motor connector 3030 are fixedly connected by a screw design. In addition, the connection manner of the rotation shaft of the driving motor 240 and the motor connection portion 3030 is not limited thereto, and a designer may easily make design adjustment according to the structure or requirement of the product itself.

The connection portion 3010 is a circular-center plate-shaped structure with the motor connection portion 3030 as a circular center, and is connected between the connection motor connection portion 3030 and a fitting portion 3020 (described in detail below), so as to drive the fitting portion 3020 to move. The connection portion 3010 fixedly supports the heat exchange bottom surface 2010 of the heat exchange element 220, and thus the connection portion 3010 is sized to just cover the heat exchange bottom surface 2010 (the first heat exchange bottom surface 2011 or the second heat exchange bottom surface 2012) of the heat exchange element 220. In the case where the heat exchange bottom surface 2020 is rectangular and the connection portion is formed in a circular plate shape, four corners of the heat exchange bottom surface 2020 are located just on the periphery of the connection portion 3010 or close to the inside of the periphery of the connection portion 3010. The connection section 3010 has a connection section inner surface 3110 and a connection section outer surface 3210. The joint inner side surface 3110 and the joint outer side surface 3210 face each other.

The connection portion inner surface 3110 is a surface of the connection portion 3010 facing the heat exchange element 220. The connection portion inner side surface 3110 is provided with: the positioning ribs 3040.

The positioning ribs 3040 are bar-shaped rib-shaped structures protruding from the inner side surface 3110 of the connection portion toward the heat exchange element 220, and each of the bar-shaped positioning ribs 3040 is connected end to form an enclosure shape for accommodating the heat exchange element 220, so as to fix the heat exchange element 220 at the enclosure position thereof, and therefore the enclosure shape of the positioning ribs 3040 is the same as the shape of the heat exchange bottom surface 2010. Specifically, the heat exchange bottom surface 2010 in this embodiment is rectangular, so that the positioning ribs 3040 include four positioning ribs 3041, four second positioning ribs 3042, four third positioning ribs 3043, and four fourth positioning ribs 3044, and surround and form a rectangle having the same shape as the heat exchange bottom surface 2010, and therefore, after the heat exchange element 220 is placed in the surrounding space of the positioning ribs 3040, the heat exchange bottom surface 2010 of the heat exchange element 220 is blocked by the protruding positioning ribs 3040, and therefore cannot move in the outside direction, so as to play a role in positioning the heat exchange element 220. The positioning ribs 3040 may extend between adjacent two of the mating portions 3020 to correspond to the respective heat exchange sides 2020 of the heat exchange element 220. Specifically, the first positioning rib 3041 corresponds to an edge of the heat exchange bottom surface 2010 intersecting the first heat exchange side surface 2021 of the heat exchange element 220, and protrudes toward the first heat exchange side surface 2021 to define the movement of the first heat exchange side surface 2021; the second positioning rib 3042 corresponds to an edge of the heat exchange element 220 where the second heat exchange side surface 2022 meets the heat exchange bottom surface 2010 and protrudes toward the second heat exchange side surface 2022 to define movement of the second heat exchange side surface 2022; the third positioning rib 3043 corresponds to an edge of the heat exchange element 220 where the third heat exchange side surface 2023 meets the heat exchange bottom surface 2010 and protrudes toward the third heat exchange side surface 2023 to define movement of the third heat exchange side surface 2023; the fourth positioning rib 3044 corresponds to an edge of the heat exchange element 220 where the fourth heat exchange side surface 2024 meets the heat exchange bottom surface 2010 and protrudes toward the fourth heat exchange side surface 2024 to define movement of the fourth heat exchange side surface 2024.

The connection portion outer side surface 3210 is a surface of the connection portion 3020 that faces the connection portion inner side surface 3110. A reinforcing rib 3050 is provided on the outer side 3210 of the connection portion.

The reinforcing rib 3050 has a rib-like structure protruding from the outer side surface 3210 of the connection portion, and reinforces the strength of the connection portion 3010. In the present embodiment, four reinforcing ribs 3050 are provided. Specifically, each of the reinforcing ribs 3050 may extend between the motor connector 3030 and the periphery of the junction 3010, and specifically, each of the reinforcing ribs 3050 may extend from the motor connector 3030 to each of the mating parts 3020 located at the periphery of the junction 3010. The respective beads 3050 may be formed in various shapes according to the arrangement of the respective engaging portions 3020 around the periphery of the junction 3010. For example, each rib 3050 connects the motor connector 3030 and the connection part 3010 at their peripheral edges, and is formed in a shape of "tian" with the peripheral edge of the connection part 3010.

The matching part 3020 is arranged at the circumferential edge of the connection part 3010, extends from the circumferential edge of the connection part 3010 to be detachably matched with the edge 2030 of the heat exchange element 220, is used for connecting the connection part 3010 and the heat exchange element 220, fixes the position of the heat exchange element 220 in a matching way, and simultaneously drives the heat exchange element 220 to rotate. The engaging portion 3020 is a strip-shaped plate-shaped structure extending from the edge of the connection portion 3010 in the direction of the edge 2030 of the heat exchange element 220 toward the heat exchange element 220 to engage with the edge 2030 of the heat exchange element 220. Each movable member 230 is provided with the same number of mating portions 3020 as the number of edges 2030 of the heat exchanging element 220. Specifically, in the present embodiment, the heat exchange element 220 is quadrangular prism-shaped, i.e. includes four edges 2030, so the number of the fitting portions 3020 is four, and each fitting portion 3020 is provided corresponding to each edge 2030. The fitting portions 2030 are provided with a space corresponding to the heat exchange side 2020 of the heat exchange element 220 for passing an air flow.

The mating portion 3020 includes a first mating portion 3021 corresponding to the first edge 2031, a second mating portion 3022 corresponding to the second edge 2032, a third mating portion 3023 corresponding to the third edge 2033, and a fourth mating portion 3024 corresponding to the fourth edge 2034. As described above, the positioning rib 3040 is provided on the joint inner side surface 3110, and a plurality of positioning ribs 3040 extend between two adjacent fitting portions 3020. Specifically, the first positioning rib 3041 extends between the fourth mating portion 3024 and the first mating portion 3021 to correspond to the first heat exchange side 2021; the second positioning rib 3042 extends between the first mating portion 3021 and the second mating portion 3022 to correspond to the second heat exchange side 2022; the third positioning rib 3043 extends between the second mating portion 3022 and the third mating portion 3023 to correspond to the third heat exchange side 2023; the fourth positioning rib 3044 extends between the third mating portion 3023 and the fourth mating portion 3024 to correspond to the fourth heat exchange side 2024.

The fitting portion 3020 has a fitting portion inner surface 3120 and a fitting portion outer surface 3220, and the fitting portion inner surface 3120 is a surface of the fitting portion 3020 facing the heat exchange element 220. The inner side surface 3210 of the fitting portion is provided with: fitting in the groove 3025.

The engagement groove 3025 serves to fix the position of the edge 2030 of the heat exchange element 220 and at the same time to rotate it. The fitting groove 3025 is formed on the fitting inner side surface 3120 and has a V-shaped cross section for receiving the edge 2030 of the heat exchange element 220, that is, the cross section of the space in the groove corresponding to the V-shaped cross section of the fitting groove 3025 is the same as the cross section of the corner where the edge 2030 of the heat exchange element 220 is located, so that the edge 2030 of the heat exchange element 220 can be inserted into the fitting groove 3025 and held in place by the fitting groove 3025. The fitting groove 3025 may extend entirely in the longitudinal direction of the fitting inner side surface 3120 or may extend partially in the longitudinal direction of the fitting inner side surface 3120, that is, the fitting groove 3025 may fit the entire edge 2030 or may fit a section of the edge 2030. Each fitting portion 3020 is provided with one fitting groove 3025, in other words, the number of fitting grooves 3025 of each movable member 230 is the same as the number of edges 2030 of the heat exchange element 220. Specifically, in the present embodiment, the heat exchanging element 220 has a quadrangular prism shape, i.e., includes four edges 2030, so that the number of the fitting grooves 3025 is four, and each fitting groove 3025 is provided corresponding to each edge 2030.

As described above, the positioning rib 3040 extends between the adjacent mating portions 3020. Specifically, in the case where the fitting portion 3020 is provided with a fitting groove 3025, an end portion of the positioning rib 3040 may be connected to the fitting groove 3025.

Specifically, the mating slot 3025 includes two angled slot segments 3025-1. To achieve a better fit of the mating groove 3025 to the edge 2030, the two groove flaps 3025-1 can be formed at the same angle as the angle at which the edge 2030 is located, for example at a right angle. Both ends of the positioning rib 3040 may be connected to the corresponding groove pieces 3025-1 of the fitting grooves 3025 of the adjacent fitting portions 3020, so that the positioning rib 3040 and the fitting grooves 3025 are connected to each other to form an enclosure space in which the heat exchange bottom surface 2010 of the heat exchange element 220 can be just accommodated. When the heat exchange element 220 is installed, after the heat exchange element is inserted into the fitting groove 3025 from the end, the heat exchange element moves along the fitting groove 3025 and finally reaches the surrounding space of the positioning rib 3040 and the fitting groove 3025, so that the position fixing effect on the heat exchange element 220 is further enhanced.

In the present embodiment, one heat exchange element 220 is surrounded by two identical movable members 230 from both ends in common. Specifically, one of the movable members 230 is inserted from the first heat exchanging bottom 2011 of the heat exchanging element 220, and the other movable member 230 is inserted from the second heat exchanging bottom 2012 of the heat exchanging element 220, and finally, until the engaging portions 3020 of the two movable members 230 are in contact with each other, that is, the protruding height of the engaging portions 3020 is about half of the length of the edge 2030 of the heat exchanging element 220. Because the heat exchange element 220 has a certain weight, the two movable members 230 are combined to control the heat exchange element 220, compared with the design of only one movable member 230, the force borne by the fitting portion 3020 can be dispersed, and the heat exchange element is prevented from being damaged due to excessive stress, and meanwhile, the positioning ribs 3040 of the two connecting portions 3010 can respectively fix the first heat exchange bottom surface 2011 and the second heat exchange bottom surface 2012, so that the positioning effect of the heat exchange element 220 is increased.

In other embodiments of the present invention, the connection portion 3010 may be a rectangle having the same size as the shape of the heat exchange bottom surface 2010, and the fitting portion 3020 extends along four corners of the connection portion 3010 to the heat exchange element 220 and fits the edge 2030 of the heat exchange element 220.

In other embodiments of the present invention, the engaging portion 3020 may not be provided, and the positioning rib 3040 on the connection portion 3010 may be used to position and fix the heat exchange element 220.

The above is a description of the structure of the movable member 230. Next, the fixed housing 210 will be described with reference to fig. 8. Fig. 8 is a structural view of a fixing frame according to the present invention.

The fixed frame 210 serves to enclose the movable member 230, wherein the movable member 230 is rotatably disposed within the fixed frame 210. The fixed frame 210 is cylindrical and is formed by joining two identical semi-cylindrical frames. The fixing frame 210 includes: a fixed frame bottom surface 1010 and a fixed frame side surface 1020.

Specifically, the fixing frame 210 includes: two fixed frame bottom surfaces 1010 which are provided opposite to each other and formed in a circular shape; and a fixed frame side surface 1020 formed as a closed loop surface sandwiched by the two fixed frame bottom surfaces 1010, and the vent hole group 1030 includes two vent holes provided in the fixed frame side surface 1020 in a manner facing each other.

The fixed frame bottom surface 1010 is two circular flat surfaces of the cylindrical fixed frame 210 facing each other, and in the attached state of the heat exchange unit 200, the fixed frame bottom surface 1010 is close to and covers the connection portion 3010 of the movable member 230. Since the fixed frame 210 surrounds the heat exchange element 220 and the movable member 230, and the heat exchange element 220 and the movable member 230 fixedly connected to each other can have a sufficient space inside the movable frame 210 to perform a rotational movement, the area of the fixed frame bottom surface 1010 is larger than the area of the connection portion 3010, and in the present embodiment, the area of the fixed frame bottom surface 1010 is set to be slightly larger than the area of the connection portion 3010 in consideration of the overall volume of the miniaturized fixed frame 210. The fixed frame bottom surface 1010 is provided with: a motor hole 1040 and a motor fixing portion 1050.

The motor hole 1040 is provided at a central position of the fixed frame bottom surface 1010, and is configured to allow a rotation shaft of the driving motor 240 to pass therethrough and to be attached to the motor connection portion 3030 of the movable member 230.

The motor fixing portion 1050 is used to fix the driving motor 240 to the fixing frame 210. In the present embodiment, the motor fixing portion 1050 is provided with a screw hole. Meanwhile, since the driving motor 240 is provided with a hole through which a screw passes, the driving motor 240 can be fixed to the fixing frame 210 by the screw.

The fixed frame side surface 1020 is an arc-shaped surface sandwiched by the fixed frame bottom surface 1010, that is, a cylindrical side surface formed as the cylindrical fixed frame 210. The fixed frame side 1020 is provided with a vent group 1030 and a protrusion piece 310.

The vent group 1030 is an opening through which an air passage passes, that is, an opening through which air can smoothly pass through the heat exchange unit 200. Specifically, the air before entering the heat exchange unit 200 passes through the vent group 1030 first, then enters the heat exchange air path 2050 of the heat exchange element 220, and after heat or humidity is transferred in the heat exchange air path 2050, the air leaves the heat exchange element 220, and then is discharged from the vent group 1030 to the heat exchange unit 200. Specifically, each set of vent openings 1030 includes vent openings disposed opposite one another on fixed frame side 1020. Air enters the heat exchange unit 200 through one of the vents of the set of vents 1030 and exits the heat exchange unit 200 through the other vent of the set of vents 1030, which form the set of vents 1030. In other words, the ventilation openings on the side surface 1020 of the fixed frame forming a complete air path are a group of ventilation openings 1030. The air can be introduced into the heat exchange air path 2050 of the heat exchange element 220 through the ventilation opening provided in the fixed frame side 1020. Therefore, in the present embodiment, two sets of the vent groups 1030 are provided, and each vent group 1030 includes two vents, that is, four vents are provided: a first vent 1031 corresponding to the first heat exchange side 2021; a second ventilation opening 1032 corresponding to the second heat exchange side 2022; a third vent 1033 corresponding to the third heat exchange side 2023; and a fourth air outlet 1034 corresponding to the fourth heat exchange side 2024. The first vent 1031 is disposed opposite to the third vent 1033 to form a first vent group, and the second vent 1032 is disposed opposite to the fourth vent 1034 to form a second vent group. In addition, the ventilation openings are spaced apart from each other, and portions between the ventilation openings are formed as fixed frame side surfaces 1020 and defined as ventilation opening gaps 1060, and the ventilation opening gaps 1060 may correspond to the fitting portions 3020 of the movable member 230 when the heat exchange element 220 and the movable member 230 are rotated together to a specific position, so that the heat exchange side surfaces 2020 of the heat exchange element 220 correspond to the ventilation opening groups 1030, and the ventilation opening gaps 1060 are prevented from obstructing air from entering the heat exchange element 220. Accordingly, the width of the vent gap 1060 is slightly greater than or equal to the width of the mating portion 3020.

The protruding piece 310 is a sheet-like structure protruding outward from the side surface of the fixed housing 210, and is used to fix the fixed housing 210 to the ventilation device 10. Specifically, since the fixing frame 210 of the present embodiment is formed by combining two semi-cylindrical frames, in order to fix the two semi-cylindrical frames at the same time, the protruding piece 310 is provided on the edge of the fixing frame side surface 1020 of each frame, and the two semi-cylindrical fixing frames can be fixed at the same time by engaging the Y-shaped fixing groove 320 of the ventilation device 10 (as shown in an enlarged view of fig. 2). In addition, the manner of fixing the heat exchange unit 200 to the ventilation device 10 is not limited thereto, and those skilled in the art may adjust various fixing manners according to product design.

As described above, the indoor side air inlet 101 and the outdoor side air outlet 102 provided in the ventilation device 10 are paired with each other to correspond to one of the air vent groups 1030, for example, a second air vent group formed by corresponding to the second air vent 1032 and the fourth air vent 1034; the outdoor side air inlet 103 and the indoor side air outlet 104 are paired with each other to correspond to the other one of the vent groups 1030, for example, to correspond to the first vent group formed by the first vent 1031 and the third vent 1033.

The air-tight protection bars 250 are provided on the inner side of the fixed frame side 1020 facing the heat exchange element 220 at spaced positions between the ventilation openings, i.e., on the fixed frame side 1020 at both sides of the ventilation openings to prevent air from leaking when air enters the heat exchange element 220 from the ventilation openings. The airtight protection strip 250 is made of a flexible material (e.g., rubber) to prevent air from flowing between adjacent ventilation openings. The airtight protector 250 is provided in a direction parallel to the rotation axis of the driving motor 240, and two airtight protection bars 250 are provided corresponding to the edges 2030 of each heat exchange member 220, respectively. When the edge of the heat exchange element 220 is rotated to the position of the vent gap 1060, the airtight protection strips 250 are positioned on both sides of the edge and closely contact both sides of the fitting portion 3020 of the movable member 230, that is, the two airtight protection strips 250 are respectively disposed on both sides of the vent gap 1060 and spaced apart from each other by a distance approximately equal to the width of the fitting portion 3020, so that air cannot escape from the gap between the fixed frame 210 and the fitting portion 3020. Meanwhile, the flexible material of the airtight protection strip 250 can ensure that the heat exchange element 220 can pass through smoothly without causing too much obstruction when rotating.

The above description is of the structure of each part of the heat exchange unit. Next, the rotation of the heat exchange unit of the present invention will be described with reference to fig. 9. Fig. 9 is a schematic cross-sectional view of the heat exchange unit cut along line D-D' of fig. 2 and a schematic front-to-back rotation of the heat exchange element.

The rotation of the heat exchange element 220 is performed by using the center line of the first heat exchange bottom 2011 and the second heat exchange bottom 2012 as the rotation axis, and the rotation axis is aligned with the center line of the connection portion 3010 of the movable member 230, the center line of the fixed frame bottom 1010, and the rotation axis of the driving motor 240. When the driving motor 240 is connected to a power source and is started, the rotating shaft of the driving motor 240 rotates and drives the movable member 230 connected to the rotating shaft to rotate, and at the same time, since the movable member 230 is fixedly connected to the heat exchanging element 220, the heat exchanging element 220 also rotates. On the other hand, the fixed frame 210 is fixed to the ventilator 10 without movement. Therefore, each heat exchange air path 2050 can be switched to correspond to a different vent group 1030 by the rotation of the heat exchange element 220.

Specifically, first, the first heat exchange side 2021 of the heat exchange element 220 corresponds to the first ventilation opening 1031 on the fixed frame side 1020; the second heat exchange side 2022 corresponds to the second ventilation opening 1032 on the fixed frame side 1020; the third heat exchange side 2023 corresponds to the third vent 1033 on the fixed frame side 1020; the fourth heat exchange side 2024 corresponds to the fourth vent 1034 on the fixed frame side 1020. That is, the first heat exchange air passage 2051 inside the heat exchange element 220 communicates with the first vent group of the fixed frame 210; the second heat-exchange air passage 2052 inside the heat-exchange element 220 communicates with the second air vent group of the fixed frame 210.

After the heat exchange element 220 and the movable member 230 are rotated clockwise by 90 °, the first heat exchange side 2021 of the heat exchange element 220 corresponds to the fourth air outlet 1034 on the fixed frame side 1020; the second heat exchange side 2022 corresponds to the first vent 1031 on the fixed frame side 1020; the third heat exchange side 2023 corresponds to the second ventilation opening 1032 on the fixed frame side 1020; the fourth heat exchange side 2024 corresponds to the third vent 1033 on the fixed frame side 1020. That is, the first heat-exchange air passage 2051 inside the heat exchange element 220 communicates with the second air passage group of the fixed frame 210; the second heat exchange air passage 2052 inside the heat exchange element 220 communicates with the first vent group of the fixed frame 210.

On the other hand, the rotation of the heat exchange element 220 is driven by the engagement of the movable member 230, and the heat exchange element 220 itself does not need to be specially designed by the arrangement of the movable member 230, in other words, the heat exchange element 220 usually existing in the field can be directly used by the arrangement of the heat exchange unit 200, thereby improving the versatility.

Next, the operation and effect of the heat exchange unit of the present invention will be described in detail with reference to fig. 10 and 11. Fig. 10 is a schematic view of an air path of the ventilating device according to the present invention; fig. 11 is a schematic view of an air path after the heat exchange element in the ventilation apparatus of fig. 10 is rotated 90 ° clockwise.

The ventilating device 10 is generally used for air exchange of indoor and outdoor spaces, that is, indoor dirty air is discharged and outdoor air is introduced into a room, thereby keeping the indoor air fresh and clean. The air of the indoor space and the air of the outdoor space exchange heat and humidity through the heat exchange unit 200 at the same time.

The heat exchange unit 200 is fixed to the case 100 by a fixing frame 210, wherein a vent hole of the fixing frame 210 corresponds to a tuyere of the case 100 to allow air to enter and exit the case 100. Specifically, the outdoor side air inlet 103 on the housing 100 corresponds to the first air outlet 1031 on the fixing frame 210; the outdoor air outlet 102 corresponds to a second air outlet 1032 on the fixed frame 210; the indoor air outlet 104 corresponds to the third air outlet 1033 of the fixed frame 210; the indoor side air inlet 101 corresponds to the fourth air inlet 1034 of the fixed frame 210.

Before the ventilating device 10 is opened, the heat exchange unit 200 is stopped at an angle, specifically, as shown in fig. 10, the first heat exchange side 2021 faces the first ventilating opening 1031, i.e., faces the outdoor side air inlet 103, the second heat exchange side 2022 faces the second ventilating opening 1032, i.e., faces the outdoor side air outlet 102, the third heat exchange side 2023 faces the third ventilating opening 1033, i.e., faces the indoor side air outlet 104, and the fourth heat exchange side 2024 faces the fourth ventilating opening 1034, i.e., faces the indoor side air inlet 101.

When the ventilator 10 is activated, the fan 300 inside the casing 100 is activated to drive the air to flow to form an airflow path. On one hand, the air in the outdoor space enters the inside of the housing 100 through the outdoor air inlet 103, and then reaches the heat exchange unit 200, and then sequentially passes through the first vent 1031 and the first heat exchange side 2021, and then enters the first heat exchange air path 2051 in the heat exchange element 220 for heat exchange, and then sequentially passes through the third heat exchange side 2023 and the third vent 1033, and then leaves the heat exchange element 220, and then, the air is continuously driven by the fan 300 to flow through the indoor air outlet 104 and then is discharged to the indoor space outside the housing 100. An air passage from the outdoor air inlet 103 to the indoor air outlet 104 is an intake air passage 1000.

On the other hand, the air in the indoor space enters the interior of the casing 100 through the indoor air inlet 101, and then reaches the heat exchange unit 200, and then sequentially passes through the fourth air vent 1034 and the fourth heat exchange side surface 2024, enters the second heat exchange air path 2052 in the heat exchange element 220 for heat exchange, and then sequentially passes through the second heat exchange side surface 2022 and the second air vent 1032 and leaves the heat exchange element 220, and then the air is continuously driven by the fan 300 to flow through the outdoor air outlet 102 and then is discharged to the outdoor space outside the casing 100. An air passage from the indoor air inlet 101 to the outdoor air outlet 102 is an exhaust air passage 2000.

However, in a severe cold season or region, the air in the outdoor space is cold, and in contrast, the air in the indoor space is warm, i.e., the air entering from the indoor side air inlet 101 is warm, the air entering from the outdoor side air inlet 103 is cold, and the temperatures of the intake air path 1000 and the exhaust air path 2000 are greatly different, so that the temperature of the first heat exchange side 2021 facing the outdoor cold air and the vicinity thereof is low, and when the indoor warm air enters the heat exchange element 220 from the fourth heat exchange side 2024 and flows through the first heat exchange side 2021 and the vicinity thereof, the first heat exchange side 2021 and the portion of the heat exchange element 220 in the vicinity thereof are caused to dewed or even frosted after a while.

Therefore, after the heat exchange element 220 stays at the angle shown in fig. 10 for a certain time, the angle of rotating the heat exchange element 220 is controlled. For example, as shown in fig. 11, the heat exchange element 220 is rotated clockwise by 90 °, the cold first heat exchange side surface 2021 is rotated to face the indoor side air inlet 101, and the temperature of the warm indoor air at the first heat exchange side surface 2021 and the vicinity thereof is raised, so that the generation of dew condensation and even frost formation at the first heat exchange side surface 2021 and the vicinity thereof can be suppressed.

At this time, the second heat exchange side 2022 faces the outdoor side air intake 103. After staying at the angle shown in fig. 11 for a certain period of time, the second heat exchange side 2022 and the portion of the heat exchange element 220 in the vicinity thereof dew or even frost is formed over a certain period of time, as in the above case, and thus the angle at which the heat exchange element 220 continues to rotate is controlled.

The next rotation may be such that the heat exchange element 220 is rotated 90 ° counterclockwise, i.e. returned to the angle shown in fig. 10; it is also possible to continue to rotate the heat exchange element 220 clockwise by 90 ° so that the third heat exchange side 2023 faces the outdoor air intake opening 103. In other words, the heat exchange element 220 may rotate in a reciprocating manner or in the same rotational direction.

Regarding the time that the heat exchange element 220 stays at a certain angle, it can be adjusted accordingly according to the outdoor temperature. For example, the lower the outdoor temperature, the shorter the time the heat exchange element 220 stays at an angle.

In addition, in the general technology in the field, in order to prevent the heat exchange element from dewing, the outdoor air inlet is generally closed so as to stop or reduce the introduction of outdoor cold fresh air, and the temperature of the heat exchange element is increased by indoor warm air, however, the introduction amount of fresh air in the indoor space is reduced by this way; alternatively, a heating component is installed inside the ventilation device to heat the element, however, this method requires additional heating components, increases the production cost or the manufacturing process. Therefore, the rotary heat exchange unit can effectively prevent the condensation and frosting on the heat exchange element, and meanwhile, the rotary heat exchange unit does not need to sacrifice the fresh air introducing amount of indoor air or add other heating parts, thereby effectively improving the comfort of users and saving the production cost.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In addition, it will be understood by those within the art that the use of ordinal numbers such as "first," "second," etc., in the specification and claims to modify a corresponding element does not by itself connote any ordinal number of the element, nor does it imply an order in which an element is sequenced from another element or a method of manufacture, but are used merely to distinguish one element having a certain name from another element having a same name. Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (17)

1. A heat exchange unit comprising:

the fixed frame body is provided with at least one group of ventilation openings; and

a heat exchange element rotatably disposed in the fixed frame and forming at least one heat exchange air passage therein independently of each other,

it is characterized in that the preparation method is characterized in that,

the heat exchange element selectively communicates the heat exchange air path with the vent group by rotating.

2. Heat exchange unit according to claim 1,

the heat exchange unit further comprises:

a movable member fixedly connected with the heat exchange element and rotatably disposed within the fixed frame; and

a driving motor connected to the movable member to drive the movable member to rotate.

3. Heat exchange unit according to claim 2,

the heat exchange element includes:

two heat exchange bottom surfaces arranged opposite to each other,

a plurality of heat exchange side surfaces which are provided to be sandwiched by the two heat exchange bottom surfaces and at least two of which are paired with each other to correspond to at least one of the heat exchange air paths,

and the two paired heat exchange side surfaces are provided with heat exchange openings communicated with the corresponding heat exchange air passages.

4. Heat exchange unit according to claim 3,

the movable member includes:

a connection part fixedly supporting the heat exchange bottom surface of the heat exchange element;

the fitting part extends from the edge of the continuous part along the direction parallel to the edge formed by intersecting the adjacent heat exchange side surfaces so as to be detachably fitted with the edge; and

and a motor connecting part formed on the connection part and connected with a rotating shaft of the driving motor.

5. Heat exchange unit according to claim 4,

the fitting part is in a strip plate shape, and a fitting groove is formed on the inner side of the fitting part facing the seamed edge,

the fitting groove and the edge are fitted with each other, and the cross section of the fitting groove is the same as that of the corner where the edge is located.

6. Heat exchange unit according to claim 5,

the number of the fitting parts is the same as that of the edges.

7. Heat exchange unit according to claim 4,

the connection portion is formed in a circular flat plate shape covering the heat exchange bottom surface.

8. Heat exchange unit according to claim 7,

the connection part is provided with a positioning rib which protrudes inwards from the inner side surface of the connection part facing the heat exchange element,

wherein the surrounding of the positioning rib forms the same shape as the heat exchange bottom surface.

9. Heat exchange unit according to claim 7,

the connecting part is provided with a reinforcing rib which is protruded outwards from the outer side surface of the connecting part opposite to the inner side surface of the connecting part,

wherein the reinforcing rib extends between the motor connecting portion and the fitting portion.

10. Heat exchange unit according to claim 4,

the heat exchange element is engaged together by the two engaging portions from opposite ends of the heat exchange element.

11. Heat exchange unit according to claim 9,

the fixed frame body includes:

two fixed frame bottom surfaces which are arranged opposite to each other and are formed into a circular shape; and

a side surface of the fixed frame body is formed into a closed curved surface clamped by the bottom surfaces of the two fixed frame bodies,

wherein, the vent group includes locating relatively two vents on the fixed frame side.

12. Heat exchange unit according to claim 11,

the driving motor is fixedly arranged at the center of the bottom surface of the fixed frame body, and a rotating shaft of the driving motor penetrates through the center of the bottom surface of the fixed frame body.

13. Heat exchange unit according to claim 12,

the inner side of the side face of the fixed frame body is provided with an airtight protection strip, and the airtight protection strip is located between the ventilation opening groups.

14. Heat exchange unit according to any one of claims 1 to 13,

the heat exchange element is formed in a quadrangular prism shape, and includes a first heat exchange air passage and a second heat exchange air passage independent of each other, and

the vent group includes a first vent group in communication with the first heat-exchange air passage and a second vent group in communication with the second heat-exchange air passage.

15. A ventilation device, comprising:

the shell is provided with an outdoor side air inlet, an outdoor side air outlet, an indoor side air inlet and an indoor side air outlet;

a fan driving air flow in the housing; and

a heat exchange unit disposed in the case and heat-exchanging air flowing in the case,

wherein the heat exchange unit is according to any one of claims 1-14.

16. The air gasper of claim 15,

the heat exchange unit is provided with a protruding sheet; and is

The shell is provided with a fixing groove which is clamped with the protruding sheet,

wherein the heat exchange unit is fixed to the case by the protrusion piece being engaged with the fixing groove.

17. The air gasper of claim 16,

the outdoor side air inlet and the indoor side air outlet are matched to correspond to one ventilation opening group in at least one ventilation opening group; and is

The indoor side air inlet and the outdoor side air outlet are paired to correspond to another set of vents in the at least one set of vents.

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