Ventilation device

Abstract

The invention relates to a ventilation device, in particular to a heat recovery ventilation device. A ventilation device according to an embodiment of the present invention comprises: a housing into which outdoor air and indoor air flow; an electric heat exchanger which is disposed inside the housing and exchanges heat between outdoor air and indoor air; and a plurality of doors for opening and closing the lower side of the housing so that the electric heat exchanger can be separated to the lower side of the housing. According to the invention, the space for opening the door can be minimized.

Description

Technical Field

[0001] This invention relates to a ventilation system, and more specifically, to a heat recovery ventilation system. Background Technology

[0002] A ventilation system is a device that exhausts polluted indoor air to the outside and supplies fresh outdoor air to the inside, thus maintaining a certain level of indoor air freshness.

[0003] In ordinary residential buildings, heat recovery ventilation systems are commonly used to reduce energy loss by recovering waste heat. These systems include electric heat exchangers that exchange heat between polluted indoor air and fresh outdoor air in order to recover waste heat.

[0004] For such ventilation systems, the heat exchanger or filter needs to be removed after opening the lower door for maintenance. Ventilation systems installed in the ceiling of multi-purpose rooms, laundry rooms, or outdoor machine rooms may have washing machines or dryers, refrigerators, outdoor units, or various other appliances below them, making it inconvenient to open the door.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: KR10-1250062B1, 2013.03.27.

[0008] Patent Document 2: KR10-1190496B1, 2012.10.05.

[0009] Patent Document 3: KR10-2009-0078184A, 2009.07.17. Summary of the Invention

[0010] The problem to be solved

[0011] The problem to be solved by the present invention is to provide a ventilation device that minimizes the space required to open a door.

[0012] The problems to be solved by the present invention are not limited to those described above. Other problems not mentioned above will be clearly understood by those skilled in the art through the following description.

[0013] Technical solutions to the problem

[0014] To address the aforementioned problem, an embodiment of the present invention provides a ventilation device comprising: a housing for receiving outdoor and indoor air; an electric heat exchanger disposed inside the housing to facilitate heat exchange between the outdoor and indoor air; and a plurality of doors for opening and closing the lower side of the housing to allow the electric heat exchanger to separate to the lower side of the housing.

[0015] To address the aforementioned problem, an embodiment of the present invention provides a ventilation device comprising: a housing for receiving outdoor air and indoor air; an electric heat exchanger disposed inside the housing for heat exchange between the outdoor air and the indoor air; a first door that opens in the direction of expelling the indoor air that has undergone heat exchange in the electric heat exchanger; and a second door that opens in the direction of expelling the outdoor air that has undergone heat exchange in the electric heat exchanger.

[0016] Additionally, the door is configured such that when opened, the upper end of the door is higher than the lower end of the housing.

[0017] Additionally, the door includes a door protrusion that protrudes towards the housing side, and the ventilation device also includes a door sensor disposed on the bottom surface of the housing and sensing contact with the door protrusion.

[0018] In addition, the door also includes: a door body; and a door cover that covers the outer surface of the door body, the door protrusion being formed in the door cover and penetrating the door body.

[0019] In addition, the rotation axis of each of the plurality of doors is arranged inside the housing.

[0020] In addition, the distance between the rotation axis of each of the plurality of doors and the lower surface of the housing is greater than the distance between the rotation axis and the side of the housing.

[0021] Additionally, each of the plurality of doors includes: a door body; and a door hinge protruding from the door body, the door hinge being an L-shaped bracket in which the length of the portion of the door hinge parallel to the door body is longer than the length of the portion of the door hinge perpendicular to the door body.

[0022] In addition, each of the plurality of doors also includes a door button, which is configured at a position that is maximally spaced from the door hinge toward the opposite side of the door body.

[0023] Additionally, each of the plurality of doors includes a door button configured to open the door by pressing it in the same direction as the rotation axis of the door.

[0024] In addition, the housing has a housing latch, which is disposed on the lower surface of the housing and is used for hooking the door button.

[0025] Additionally, an exhaust fan is disposed inside the housing and exhausts air to the outside; an air supply fan is disposed inside the housing and exhausts air to the inside; a control box is disposed inside the housing and controls the exhaust fan and the air supply fan; and a control box cover is attached to the housing and covers the control box. Each of the plurality of doors includes a door button, which opens the door when operated. The control box cover has a door latch for the door button to be hooked.

[0026] Specific details of other embodiments are included in the detailed description and accompanying drawings.

[0027] Invention Effects

[0028] The ventilation device according to the present invention has one or more of the following effects.

[0029] First, it has the advantage of dividing the door into multiple parts, each of which opens in the direction of air inflow or outflow, thereby minimizing the space required to open the door.

[0030] Secondly, it also has the advantage of minimizing the space required to open the door by designing the door hinges so that the upper part of the door is higher than the lower part of the housing when the door is opened.

[0031] Third, it also has the advantage of being able to replace the filter even if any one of the multiple doors is opened.

[0032] The effects of the present invention are not limited to those mentioned above. Other effects not mentioned will be clearly understood by those skilled in the art through the description in the claims. Attached Figure Description

[0033] Figure 1 This is a perspective view of a ventilation device according to an embodiment of the present invention.

[0034] Figure 2 This is an exploded perspective view of a ventilation device according to an embodiment of the present invention.

[0035] Figure 3 The figure illustrates a scenario where the door of the ventilation device according to an embodiment of the present invention is opened, thereby allowing the components to be removed.

[0036] Figure 4 This is an internal structural diagram of a ventilation device according to an embodiment of the present invention.

[0037] Figure 5 This is a partial exploded perspective view of a ventilation device according to an embodiment of the present invention.

[0038] Figure 6 This is an exploded perspective view of the door of the ventilation device according to an embodiment of the present invention.

[0039] Figure 7 This is a partial cross-sectional view of the ventilation device according to an embodiment of the present invention when the door is closed.

[0040] Figure 8 This is a partial cross-sectional view of the ventilation device according to an embodiment of the present invention when the door is open.

[0041] Figure 9 This is a bottom view of a ventilation device according to an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures

[0043] 110: Housing 111: External airflow path

[0044] 112: Air supply path 113: Air exchange path

[0045] 114: Exhaust flow path; 115: Housing clips

[0046] 116: Door sensor; 118: Central storage space

[0047] 119: External storage space 120: Shell cover

[0048] 130: Door 130a: First Door

[0049] 130b: Second door; 131: Main door body

[0050] 132: Door cover 133: Door button

[0051] 134: Door protrusion 137: Door hinge

[0052] 138: Door damper; 139: Hinge cover

[0053] 141: Control box cover; 1415: Door latch

[0054] 149: Control box; 151: External air flange

[0055] 152: Gas supply flange; 153: Ventilation flange

[0056] 154: Exhaust flange; 162: Air supply fan

[0057] 164: Exhaust fan; 190: Heat exchanger Detailed Implementation

[0058] The advantages and features of the present invention, as well as the methods for achieving these advantages and features, will become clear from the accompanying drawings and detailed embodiments described below. However, the present invention is not limited to the embodiments disclosed below and can be implemented in many different ways. These embodiments are provided merely to complete the disclosure of the invention and to fully reveal the scope of the invention to those skilled in the art, which is defined only by the scope of the claims. Throughout this specification, the same reference numerals denote the same constituent elements.

[0059] Although terms such as "first," "second," etc., are used to describe various constituent elements, it is clear that these constituent elements are not limited by these terms. These terms are used only to distinguish one constituent element from others, and unless there is a particularly contrary statement, it is obvious that a first constituent element can also be a second constituent element.

[0060] Throughout the instruction manual, unless otherwise stated otherwise, each constituent element may be either singular or plural.

[0061] Hereinafter, the arrangement of any constituent element in the "upper (or lower) part" or "above (or below)" of a constituent element can not only indicate that any constituent element is arranged in contact with the upper (or lower) surface of the constituent element, but also indicate that other constituent elements are introduced between the constituent element and any constituent element arranged above (or below) the constituent element.

[0062] Furthermore, when a constituent element is described as being "connected", "combined", or "linked" to other constituent elements, although the constituent elements may be directly connected or linked to each other, it should be understood that other constituent elements may also "intervene" between the constituent elements, or that the constituent elements may be "connected", "combined", or "linked" using other constituent elements.

[0063] In this specification, the singular expression used includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "constituting" or "comprising" should not be construed as necessarily including all the various constituent elements or steps described in the specification, but should be construed as excluding some constituent elements or steps, or including additional constituent elements or steps.

[0064] Throughout the instruction manual, when referred to as "A and / or B", unless otherwise specified, it means A, B, or A and B; when referred to as "C to D", unless otherwise specified, it means C or less than D.

[0065] Hereinafter, the present invention will be described with reference to the accompanying drawings illustrating the ventilation device, through embodiments thereof.

[0066] Figure 1 This is a perspective view of a ventilation device according to an embodiment of the present invention. Figure 2 This is an exploded perspective view of a ventilation device according to an embodiment of the present invention. Figure 3 The figure illustrates a configuration where components of the ventilation device according to an embodiment of the present invention have been removed. Figure 4 This is an internal structural diagram of a ventilation device according to an embodiment of the present invention.

[0067] An embodiment of the ventilation device of the present invention includes: a housing 110 forming the exterior and allowing outdoor and indoor air to flow in; a plurality of doors 130 rotatably coupled to the lower side of the housing 110; a housing cover 120 covering the upper surface of the housing 110; an exhaust fan 164 disposed inside the housing 110 and discharging air to the outside; an air supply fan 162 disposed inside the housing 110 and discharging air to the inside; an electric heat exchanger 190 disposed in the center inside the housing 110 for exchanging heat between outdoor and indoor air; a control box 149 disposed inside the housing 110 and controlling the exhaust fan 164 and the air supply fan 162; and a control box cover 141 coupled to the housing 110 and covering the control box 149.

[0068] The housing 110 has a generally rectangular parallelepiped shape, giving it the appearance of a ventilation device. The housing 110 has internal airflow paths and spaces for various components. The housing 110 includes an upper housing 110a forming the upper part and a lower housing 110b forming the lower part.

[0069] The housing 110 has four flow paths internally for airflow. (Refer to...) Figure 4 Inside the housing 110 are formed an external airflow path 111 for air flowing in from the outside (outdoor air or outside gas, OA); an exhaust flow path 114 for air flowing out to the outside (exhaust, EA); an exchange flow path 113 for air flowing in from the inside (indoor air or ventilation, RA); and a supply flow path 112 for air flowing out to the inside (supply, SA).

[0070] The housing 110 internally forms a space, namely a central storage space 118, for housing the heat exchanger 190, the external air filter 181, and the ventilation filter 183. The central storage space 118 is configured to be surrounded by an external airflow path 111, an exhaust airflow path 114, a ventilation airflow path 113, and a supply airflow path 112. (Refer to...) Figure 3 When the lower side of the central storage space 118 is opened, thereby opening the plurality of doors 130, the heat exchanger 190, the external air filter 181, and the ventilation filter 183 can be separated to the lower side.

[0071] The housing 110 has a recessed space on its outer side to accommodate the control box 149, namely the outer storage space 119. The outer storage space 119 is positioned between the external airflow path 111 and the air exchange path 113. (Refer to...) Figure 3 When the lower side of the outer storage space 119 is opened, thereby opening the plurality of doors 130, the control box 149 and the control box cover 141 can be separated to the lower side.

[0072] The housing 110 contains an exhaust fan 164, an air supply fan 162, an external air damper 171, a ventilation damper 173, a bypass ventilation damper 175, a recirculation damper 176, an exhaust damper 174, and an air supply damper 172. The housing 110 also contains an external air flange 151, a ventilation flange 153, an exhaust flange 154, an air supply flange 152, and a control box cover 141. The housing 110 has a housing cover 120 on its upper side and a plurality of doors 130 on its lower side.

[0073] The housing cover 120 covers the upper surface of the housing 110, forming the upper surface of the housing. The housing cover 120 is attached to the upper side of the housing 110 in the form of a rectangular plate. Insulating material may be provided between the housing cover 120 and the housing 110.

[0074] A plurality of doors 130 open and close the lower side of the housing 110 to allow the heat exchanger 190 to separate to the lower side of the housing 110. When closed, the plurality of doors 130 completely cover the lower surface of the housing 110; when open, they completely expose the lower surface of the housing 110. The plurality of doors 130 open and close the open lower side of the central storage space 118, allowing the heat exchanger 190, the external air filter 181, and the ventilation filter 183 to separate to the lower side when open. The plurality of doors 130 open and close the open lower side of the outer storage space 119, allowing the control box 149 and the control box cover 141 to separate to the lower side when open.

[0075] The plurality of doors 130 includes a first door 130a disposed on the side of the external air flange 151 and the exhaust flange 154, and a second door 130b disposed on the side of the ventilation flange 153 and the air supply flange 152. The first door 130a opens in the direction in which indoor air that has undergone heat exchange in the electric heat exchanger 190 is discharged to the outside, and the second door 130b opens in the direction in which outdoor air that has undergone heat exchange in the electric heat exchanger 190 is discharged to the inside. According to an embodiment, the first door 130a opens in a direction perpendicular to the direction in which indoor air that has undergone heat exchange in the electric heat exchanger 190 is discharged to the outside, and the second door 130b opens in a direction perpendicular to the direction in which outdoor air that has undergone heat exchange in the electric heat exchanger 190 is discharged to the inside.

[0076] An exhaust fan 164 is located inside the housing 110, on the left rear side of the exhaust flow path 114. The exhaust fan 164 discharges indoor air, which has flowed in through the ventilation flange 153 and undergone heat exchange in the electric heat exchanger 190, to the outside. An exhaust damper 174 is located at the exhaust outlet of the exhaust fan 164. The exhaust outlet of the exhaust fan 164 is connected to the exhaust flange 154. A recirculation damper 176 is located in front of the exhaust fan 164, and an air supply fan 162 is located on the right side of the exhaust fan 164.

[0077] An air supply fan 162 is located inside the housing 110, on the right rear side, within the air supply passage 112. The air supply fan 162 discharges outdoor air, which has entered through the external air flange 151 and undergone heat exchange in the electric heat exchanger 190, into the room. An air supply damper 172 is located at the outlet of the air supply fan 162. The outlet of the air supply fan 162 is connected to the air supply flange 152. A bypass ventilation damper 175 is located in front of the air supply fan 162, and an exhaust fan 164 is located on the left side of the air supply fan 162.

[0078] The heat exchanger 190 is disposed in a central storage space 118 inside the housing 110. The heat exchanger 190 is configured to be surrounded by an external airflow passage 111, an exhaust airflow passage 114, a ventilation airflow passage 113, and a supply airflow passage 112. An external air filter 181 is disposed on the front left side of the heat exchanger 190, a ventilation filter 183 is disposed on the front right side, an exhaust fan 164 is disposed on the rear left side, and a supply air fan 162 is disposed on the rear right side. The heat exchanger 190 can be removed from the underside of the housing 110 when the plurality of doors 130 are opened.

[0079] The electric heat exchanger 190 exchanges heat between outdoor air flowing from the outside airflow path 111 to the supply airflow path 112 and indoor air flowing from the exchange airflow path 113 to the exhaust airflow path 114. The electric heat exchanger 190 includes a plurality of gaskets and a plurality of spacers that cross-form multiple flow paths to allow outdoor air and indoor air to cross-flow.

[0080] The control box 149 is located in the outer storage space 119 at the front center inside the housing 110. The control box 149 is positioned between the external airflow path 111 and the ventilation path 113. The control box 149 is also positioned between the external air flange 151 and the ventilation flange 153. The external air flange 151 is located on the left side of the control box 149, the ventilation flange 153 is located on its right side, and the control box cover 141 is located at the front. The control box 149 is attached to the housing 110 and separates towards the lower side of the housing 110 when the plurality of doors 130 are opened.

[0081] The control box 149 contains electronic components such as printed circuit boards and integrated circuits. The control box 149 controls the external air damper 171, the ventilation damper 173, the bypass ventilation damper 175, the recirculation damper 176, the exhaust damper 174, the air supply damper 172, the exhaust fan 164, and the air supply fan 162 and supplies them with power.

[0082] A control box cover 141 is positioned at the front center of the housing 110. The control box cover 141 is an L-shaped panel surrounding the front and lower surfaces of the control box 149. The control box cover 141 conceals the outer storage space 119. The control box cover 141 covers the control box 149, thereby protecting it. The control box cover 141, together with the sides of the housing 110, forms the exterior side profile. The control box cover 141 is detachably attached to the side of the housing 110. The control box cover 141 separates towards the lower side of the housing 110 when the plurality of doors 130 are opened.

[0083] An embodiment of the ventilation device of the present invention further includes: an outside air damper 171, disposed in the outside airflow path 111, and restricting the inflow of outside air; a ventilation damper 173, disposed in the ventilation path 113, and restricting the inflow of indoor air; an exhaust damper 174, disposed in the exhaust fan 164, and restricting the exhaust of air; an air supply damper 172, disposed in the air supply fan 162, and restricting the exhaust of air; a bypass ventilation damper 175, which, when open, guides indoor air from the ventilation path 113 to the exhaust path 114; and a recirculation damper 176, which, when open, recirculates exhaust air. Indoor air in airflow path 114 is guided to outdoor airflow path 111; outdoor air flange 151 is connected to an outdoor air duct extending to the outside to allow outdoor air to flow in; ventilation flange 153 is connected to a ventilation duct extending to the inside to allow indoor air to flow in; exhaust flange 154 is connected to an exhaust duct extending to the outside to discharge air to the outside; air supply flange 152 is connected to an air supply duct extending to the inside to discharge air to the inside; outdoor air filter 181 purifies the air flowing into outdoor airflow path 111; and ventilation filter 183 purifies the air flowing into ventilation airflow path 113.

[0084] An external air damper 171 is disposed inside the housing 110 on the front left side of the external airflow passage 111. The external air damper 171 is disposed between the external air flange 151 and the electric heat exchanger 190 to restrict the flow of air flowing in from the outside or to regulate the air volume.

[0085] The ventilation damper 173 is disposed in the ventilation passage 113 on the front right side inside the housing 110. The ventilation damper 173 is disposed between the ventilation flange 153 and the electric heat exchanger 190, thereby restricting the flow of air from the room or regulating the air volume.

[0086] Exhaust damper 174 is disposed inside the housing 110 at the rear left side of the exhaust flow path 114. Exhaust damper 174 is disposed at the outlet of exhaust fan 164 to restrict the flow of air discharged from exhaust fan 164 to the outside or to regulate the air volume. Exhaust damper 174 restricts the inflow of air from the outside.

[0087] An air supply damper 172 is disposed inside the housing 110, on the rear right side of the air supply passage 112. The air supply damper 172 is disposed at the outlet of the air supply fan 162, restricting the flow of air discharged from the air supply fan 162 into the room or regulating the airflow. The air supply damper 172 restricts the inflow of air from the room.

[0088] A bypass ventilation damper 175 is located on the right center inside the housing 110. The bypass ventilation damper 175 is located between the air exchange passage 113 and the air supply passage 112, and when open, it guides the air in the air exchange passage 113 to the exhaust passage 114.

[0089] The recirculation damper 176 is located on the left center inside the housing 110. The recirculation damper 176 is located between the exhaust flow path 114 and the external airflow path 111. When open, it guides the air in the exhaust flow path 114 to the external airflow path 111.

[0090] An external air flange 151 is located on the front left side of the housing 110. The external air flange 151 guides the incoming outdoor air OA into the external airflow path 111. The external air flange 151 protrudes to the left, but according to an embodiment, it may protrude forward.

[0091] A ventilation flange 153 is located on the front right side of the exterior of the housing 110. The ventilation flange 153 guides the incoming air RA from the room into the ventilation path 113. The ventilation flange 153 protrudes to the right, but according to an embodiment, it may protrude forward.

[0092] Exhaust flange 154 is located on the rear left side outside the housing 110. Exhaust flange 154 discharges indoor air that has undergone heat exchange in the electric heat exchanger 190 to the outside. Exhaust flange 154 also directs air EA discharged from exhaust fan 164 to the outside.

[0093] The air supply flange 152 is located on the rear right side of the exterior of the housing 110. The air supply flange 152 discharges outdoor air, which has undergone heat exchange in the electric heat exchanger 190, into the interior. The air supply flange 152 also guides the air SA discharged from the air supply fan 162 into the interior.

[0094] An outside air filter 181 is disposed inside the housing 110 in the front left side of the outside airflow path 111. The outside air filter 181 is positioned between the outside air damper 171 and the heat exchanger 190 to purify the air flowing in from the outside (outdoor air). The outside air filter 181 can be any filter that removes odors or harmful substances or filters fine particles. In this embodiment, the outside air filter 181 includes, for example... Figure 3 The external air dust filter 181a, which filters out fine particles, and the external air deodorizing filter 181b, which removes odors, are shown.

[0095] An air exchange filter 183 is disposed in the air exchange passage 113 on the front right side inside the housing 110. The air exchange filter 183 is positioned between the air exchange damper 173 and the electric heat exchanger 190 to purify the air flowing in from the room (indoor air). The air exchange filter 183 can be any filter that removes odors or harmful substances or filters fine particles; in this embodiment, the air exchange filter 183 is a dust filter that filters fine particles.

[0096] Figure 5 This is a partial exploded perspective view of a ventilation device according to an embodiment of the present invention. Figure 6 This is an exploded perspective view of the door of the ventilation device according to an embodiment of the present invention. Figure 7 This is a partial cross-sectional view of the ventilation device according to an embodiment of the present invention when the door is closed. Figure 8 This is a partial cross-sectional view of the ventilation device according to an embodiment of the present invention when the door is open. Figure 9 This is a bottom view of a ventilation device according to an embodiment of the present invention.

[0097] Multiple doors 130 open and close to the lower side of housing 110 so that control box 149, control box cover 141, electric heat exchanger 190, external air filter 181 or air exchange filter 183 can be separated to the lower side of housing 110.

[0098] Each of the plurality of doors 130 is rotatably coupled to the housing 110, with the rotation axis disposed inside the housing 110. (See reference...) Figure 7 and Figure 8 The distance between the rotation axis of door 130 and the lower surface of housing 110 is greater than the distance between the rotation axis of door 130 and the side of housing 110. This minimizes the space required to open the plurality of doors 130. The opening speed of the plurality of doors 130 is adjusted to prevent them from opening too quickly.

[0099] Reference Figure 5 and Figure 6Each of the plurality of doors 130 includes: a door body 131 forming the main body of the door; a door cover 132 covering the outer surface of the door body 131; a door hinge 137 protruding from the door body 131; a hinge cover 139 engaging with the interior of the housing 110 and rotatably engaging with the door hinge 137; a door damper 138 engaging with the door hinge 137 and the hinge cover 139 and controlling the rotation speed; a door button 133 that opens the door 130 when operated (pressed); and a door protrusion 134 protruding toward the housing 110 side (based on the closed state of the door 130).

[0100] The door body 131 is a rectangular flat plate with the rotation axis of the door 130 along its long side. A door hinge 137 is provided on one long side of the door body 131, and a door button 133 is provided on the other long side. The door hinge 137 is provided on the inner surface of the door body 131 (the surface in the direction of the housing 110 when the door 130 is closed), and a door cover 132 is provided on the outer surface.

[0101] Reference Figure 7 The door body 131 is formed as a curved surface such that at least one edge (side) protrudes laterally towards the lower side (based on the door 130 being closed). When the plurality of doors 130 are closed, the lower ends of all edges of the door body 131, except for the edges that meet each other, protrude laterally beyond the housing 110. This facilitates the user's gripping of the door 130 when it is open and minimizes the exposure of the housing 110 to the outside.

[0102] Reference Figure 7 The housing 110 is formed with its lower end recessed inward, and the upper side of the door body 131 is recessed to allow the lower end of the housing 110 to be inserted. That is, the door body 131 is a disc-shaped structure with its edges protruding upward, allowing the lower end of the housing 110 to be inserted.

[0103] The door cover 132, as a part exposed to the outside from the ventilation device installed on the ceiling, protects the ventilation device and improves aesthetics. The door cover 132 completely covers the outer surface (lower surface) of the door body 131 and a portion of the side edge of the door body 131.

[0104] The door hinge 137 is an L-shaped bracket that protrudes from the inner surface of the door body 131 in a direction perpendicular to the door body 131, then bends at a 90-degree angle and extends in a direction parallel to the door body 131. The bent portion of the door hinge 137 is circular. The length of the portion of the door hinge 137 parallel to the door body 131 is longer than the length of the portion of the door hinge 137 perpendicular to the door body 131. When the portion of the door hinge 137 in which the door damper 138 is inserted is called the free end, and the portion of the door hinge 137 connected to the door body 131 is called the fixed end, the distance from the free end to the fixed end of the door hinge 137, when referenced to the direction parallel to the door body 131, is longer than the distance from the free end to the fixed end when referenced to the direction perpendicular to the door body 131. The door hinge 137 is designed such that the rotation axis of the door 130 is maximized to be disposed inside the housing 110, minimizing the space for the door 130 to open. Additionally, as... Figure 8 As shown, door 130 is configured such that when it is open, the upper end of door 130 is higher than the lower end of housing 110. Door hinge 137 has a hinge damper groove 1378 formed at its free end for door damper 138 to be inserted.

[0105] A door 130 has a pair of door hinges 137, which are spaced apart to the maximum extent and are respectively located at the front and rear ends of a long side of the door body 131.

[0106] Reference Figure 8 When the door 130 is opened, the door body 131 does not contact the side of the housing 110, but the door hinge 137 contacts the side of the housing 110. That is, the door hinge 137 acts as a limiter when the door 130 is opened, thereby limiting the opening angle of the door 130.

[0107] The hinge cover 139 is a generally hexahedral shape with an internal space to accommodate the door hinge 137 and the door damper 138. The hinge cover 139 has a circular surface corresponding to the circular bend of the door hinge 137. The hinge cover 139 has a hinge cover boss 1395 that protrudes from the circular surface and engages with the housing 110. The hinge cover 139 has a cover damper groove 1398 formed at a corner separated from the door body 131 for the insertion of the door damper 138.

[0108] A door 130 has a pair of hinge covers 139, which are configured correspondingly to a pair of door hinges 137.

[0109] One side of the door damper 138 engages with the hinge damper groove 1378, and the other side engages with the cover damper groove 1398, thereby controlling the rotational movement of the door hinge 137 relative to the hinge cover 139. The door damper 138 controls the opening and closing speed of the door 130 by incorporating a fluid or spring mechanism internally. The door damper 138 prevents violent movements when the door 130 is opened and provides a cushioning effect when the door 130 is closed.

[0110] Door button 133 is positioned at a location maximally spaced from the opposite side of the door body 131 from the rotation axis of the door 130. Door button 133 is positioned such that it abuts against the portions of the first door 130a and the second door 130b when they are closed. Door button 133 is positioned at maximum distance from the opposite side of the door body 131 from the door hinge 137. Thus, door button 133 allows the door 130 to close stably by a slight hooking force. Furthermore, the user can stably open the door 130 in conjunction with the operation of door button 133. Door button 133 is configured so that the door 130 can be opened by pressing in the same direction as the rotation axis of the door 130.

[0111] Reference Figure 5 The door button 133 includes a door hook 1335 that is hooked onto the lower surface of the control box cover 141 or the lower surface of the housing 110.

[0112] A door 130 has a pair of door buttons 133, which are spaced apart and located at the front and rear ends of the other long side of the door body 131. The door hook 1335 of the door button 133 located at the front end of the door 130 is hooked onto the door keeper 1415 of the control box cover 141, and the door hook 1335 of the door button 133 located at the rear end of the door 130 is hooked onto the case keeper 115 of the housing 110. Since some of the door buttons 133 are hooked onto the door keeper 1415 of the control box cover 141, the door 130 cannot be fully closed when the control box cover 141 is detached from the housing 110. Therefore, it is possible to prevent the door 130 from being closed with the control box cover 141 not properly secured.

[0113] The door protrusion 134 presses against the door sensor 116 when the door 130 is closed. The door sensor 116 is disposed on the bottom surface of the housing 110 and senses the contact of the door protrusion 134 when the door 130 is closed. That is, the door sensor 116 senses the closure of the door 130. The door protrusion 134 is formed on the door cover 132 and extends through the door body 131. When the door cover 132 is separated and only the door body 131 is closed, the door sensor 116 does not operate, so that the user can confirm the detachment or absence of the door cover 132.

[0114] Reference Figure 9 The lower surface of the heat exchanger 190 is quadrilateral (square in this embodiment), and the first door 130a and the second door 130b are connected to each other on the line connecting the two opposite vertices of the heat exchanger 190 when closed. That is, the first door 130a and the second door 130b are configured separately with reference to the line connecting the two opposite vertices of the heat exchanger 190.

[0115] An external air filter 181 is located on the side of the first door 130a, and an air exchange filter 183 is located on the side of the second door 130b. Thus, the external air filter 181 can be separated and replaced by opening only the first door 130a, and the air exchange filter 183 can be separated and replaced by opening only the second door 130b.

[0116] According to the embodiment, the external air filter 181 and the air exchange filter 183 can both be arranged on the side of the first door 130a or on the side of the second door 130b, so that the external air filter 181 and the air exchange filter 183 can be completely separated and replaced by opening only one of the first door 130a and the second door 130b.

[0117] The preferred embodiments of the present invention have been illustrated and described above. However, the present invention is not limited to the specific embodiments described above. Of course, various modifications can be made by those skilled in the art without departing from the spirit of the present invention as claimed in the claims. Such modifications should not be understood separately from the technical concept or vision of the present invention.

Claims

1. A ventilation device, wherein, include: The casing allows both outdoor and indoor air to flow in. An electric heat exchanger, disposed inside the housing, enables heat exchange between outdoor air and indoor air; as well as Multiple doors are used to open and close the lower side of the housing so that the heat exchanger can be separated from the lower side of the housing.

2. The ventilation device according to claim 1, wherein, Also includes: The exhaust flange discharges indoor air that has undergone heat exchange in the electric heat exchanger to the outside. as well as The gas supply flange discharges outdoor air, which has undergone heat exchange in the electric heat exchanger, into the room. The plurality of said gates include: The first door is located on the exhaust flange side; as well as The second door is located on the gas supply flange side.

3. The ventilation device according to claim 2, wherein, The lower surface of the electric heat exchanger is quadrilateral. When closed, the first door and the second door are connected to each other on the lines connecting the two opposite vertices of the heat exchanger.

4. The ventilation device according to claim 2, wherein, It also includes an outside air filter disposed inside the housing to purify outdoor air. The external air filter is disposed on the side of the first door and can be separated to the lower side of the housing when the first door is open.

5. The ventilation device according to claim 2, wherein, It also includes an air exchange filter disposed inside the housing to purify indoor air. The air filter is disposed on the side of the second door and can be separated to the lower side of the housing when the second door is open.

6. The ventilation device according to claim 1, wherein, One edge of the door protrudes further downwards and to the side.

7. The ventilation device according to claim 6, wherein, The lower end of the edge of the door protrudes laterally beyond the housing.

8. The ventilation device according to claim 6, wherein, The edge of the door is formed as a curved surface.

9. The ventilation device according to claim 1, wherein, The shell is formed such that its lower end is concave inward. The upper side of the door is recessed to allow the lower end of the housing to be inserted.

10. A ventilation device, wherein, include: The casing allows both outdoor and indoor air to flow in. An electric heat exchanger, disposed inside the housing, enables heat exchange between outdoor air and indoor air; as well as The first and second doors open and close the lower side of the housing to allow the heat exchanger to separate to the lower side of the housing, and are configured separately with reference to the line connecting the two opposite vertices of the heat exchanger.

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