Heat exchange type ventilator and method for installing filer in heat exchange type ventilator

Abstract

To improve workability when installing a filter in a heat exchange type ventilator.SOLUTION: Provided is a heat exchange type ventilator having: a casing in which an air supply passage and an exhaust air passage are formed; a heat exchanger that exchanges heat between an air supply flow and an exhaust air flow; a filter unit having an elastically deformable filter, and a filter frame that is a frame provided on side surfaces of the filter, and on which a first notched part is provided on the frame provided on a first surface which is one side surface of the filter, and which is provided in the air supply passage or upstream of the heat exchanger in the air supply passage; a first filter fixing part that fixes the first surface; a second filter fixing part that fixes one side surface of the filter different from the first surface; and an inspection opening in which the filter unit can be inserted. The first filter fixing part comprises one fixing part supporting one side of the first notched part in the state of the first surface being fixed, and the other fixing part supporting an opposite side of the one side of the first notched part.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present disclosure relates to a heat exchange ventilation device and a method for attaching a filter in a heat exchange ventilation device. [Background technology]

[0002] Conventionally, there is known a heat exchange type ventilator that has an intake air duct for supplying outdoor air into a room and an exhaust air duct for exhausting indoor air to the outside of the room in a casing, and ventilates by exchanging heat between the intake air flowing through the intake air duct and the exhaust air flowing through the exhaust air duct. In addition, in the heat exchange type ventilator, a filter and a filter frame that supports the filter are provided in the casing to remove foreign matter in the intake air duct or the exhaust air duct.

[0003] Installation or maintenance of the heat exchange ventilation system is performed through an inspection hatch provided in the casing, which allows access to the filter and filter frame.

[0004] The heat exchange type ventilation device disclosed in Patent Document 1 has a structure in which a filter unit, which is an integrated unit of a filter and a filter frame that supports the filter, is attached along the surface of a heat exchanger. This structure eliminates the need to insert the filter and the filter frame separately into the casing, and therefore reduces the labor required to attach the filter and the filter frame. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2021-156448 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the case of the configuration of the heat exchange type ventilation device disclosed in Patent Document 1, the filter frame is continuously attached to all sides of the filter, so the filter cannot elastically deform in a direction perpendicular to the side. Therefore, the heat exchange type ventilation device disclosed in Patent Document 1 has a problem that the workability is poor when attaching the filter unit along the surface of the heat exchanger.

[0007] The present disclosure has been made to solve the above-mentioned problems, and aims to improve the ease of work when attaching a filter, compared to the configuration disclosed in Patent Document 1. [Means for solving the problem]

[0008] The heat exchange type ventilation device disclosed herein includes an intake air blower that supplies outdoor air into a room to generate an intake airflow in an intake air duct, an exhaust air blower that exhausts indoor air to the outside to generate an exhaust airflow in an exhaust air duct, a casing in which an intake air duct and an exhaust air duct are formed, a heat exchanger that exchanges heat between the intake airflow and the exhaust airflow, a filter capable of elastic deformation, and a filter frame that is provided on a side of the filter, the frame being provided on a first surface, which is one side of the filter, and having a first cutout portion that is a discontinuous portion; The filter unit is provided upstream of the heat exchanger in the intake air duct, or upstream of the heat exchanger in the exhaust air duct, a first filter fixing portion for fixing the first surface, a second filter fixing portion for fixing one side of the filter different from the first surface, and an inspection port portion that communicates with the inside of the casing and through which the filter unit can be inserted, and the first filter fixing portion has a one-side fixing portion that supports one side of the first cutout portion and an other-side fixing portion that supports the side opposite to the one side of the first cutout portion when the first surface is fixed.

[0009] Furthermore, the method of installing a filter in a heat exchange type ventilation device of the present disclosure includes a first step in which a filter unit having an elastically deformable filter and a filter frame provided on a side of the filter, the frame being provided on a first side, which is one side of the filter, and having a notch provided in the frame; a second step in which a load is applied to the filter unit in a direction perpendicular to the first face, causing the filter to elastically deform; a third step which is carried out after completion of the first and second steps, and in which one side of the filter different from the first face is fixed by a second filter fixing part which is provided upstream of a heat exchanger which exchanges heat between the intake air flow and the exhaust air flow in the intake air flow duct, or upstream of the heat exchanger in the exhaust air duct; and a fourth step which is carried out after completion of the third step, and in which the load applied in the second step is removed, and the notch is provided between the one fixing part and the other fixing part of the first filter fixing part. Effect of the Invention

[0010] The heat exchanger-type ventilator and the method of attaching a filter in a heat exchanger-type ventilator of the present disclosure have the advantage of being able to improve the workability when attaching a filter, compared to the configuration disclosed in Patent Document 1. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a heat exchange type ventilation device according to an embodiment; [Diagram 2] FIG. 2 is a front view of the heat exchange type ventilation device according to the embodiment. [Diagram 3] 3 is a cross-sectional view taken along line AA of FIG. 2 of the heat exchange type ventilation device according to the embodiment. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line BB of FIG. 3 of the heat exchange type ventilation device according to the embodiment. [Diagram 5] 1 is a perspective view showing a state in which an exhaust filter cover and an intake filter cover of a heat exchange type ventilation device according to an embodiment have been removed; FIG. [Figure 6] 1 is a perspective view of an exhaust filter of a heat exchange type ventilation device according to an embodiment when the exhaust filter is not elastically deformed. FIG. [Figure 7] 1 is a perspective view of an exhaust filter unit of a heat exchange type ventilation device according to an embodiment when the exhaust filter is not elastically deformed; FIG. [Figure 8] 1 is a perspective view of an exhaust filter unit when an exhaust filter of a heat exchange type ventilation device according to an embodiment is elastically deformed. FIG. [Figure 9] 4 is an enlarged view of the vicinity of a first cutout portion of an exhaust filter frame of a heat exchange type ventilation device according to an embodiment of the present invention. FIG. [Figure 10] 4 is an enlarged view of the periphery of the exhaust filter unit in the BB cross-sectional view of FIG. 3 of the heat exchange type ventilation device according to the embodiment. FIG. [Figure 11] 3 is an enlarged perspective view of the periphery of an exhaust filter fixing portion of a heat exchange type ventilation device according to an embodiment of the present invention. FIG. [Figure 12] 10A to 10C are diagrams showing the configuration of a second filter fixing part of the exhaust filter fixing part of the heat exchange type ventilation device according to the embodiment. [Figure 13] 10 is a flowchart showing a procedure for installing an exhaust filter unit of a heat exchange type ventilation device according to an embodiment. [Figure 14] 11 is a flowchart showing a procedure for fixing an exhaust filter unit of a heat exchange type ventilation device according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the following embodiment, and modifications or omissions can be made without departing from the spirit of the present disclosure. In addition, elements common to each drawing are given the same reference numerals, and duplicated explanations will be omitted.

[0013] Embodiment FIG. 1 is a perspective view showing a heat exchanger type ventilation device 100 according to an embodiment. FIG. 2 is a front view of the heat exchanger type ventilation device 100 according to an embodiment. FIG. 3 is a cross-sectional view of the heat exchanger type ventilation device 100 according to an embodiment taken along line A-A in FIG. 2. FIG. 4 is a cross-sectional view of the heat exchanger type ventilation device 100 according to an embodiment taken along line B-B in FIG. 3. FIG. 5 is a perspective view showing the heat exchanger type ventilation device 100 according to an embodiment with the exhaust filter cover 19 and the intake filter cover 29 removed. In addition, in FIG. 3 and FIG. 4, the flow of air in the heat exchanger type ventilation device 100 is indicated by arrows. The overall configuration of the heat exchanger type ventilation device 100 will be described with reference to FIG. 1 to FIG. 5.

[0014] In the drawings of the present disclosure, the up-down, left-right, and front-rear directions of the heat exchange ventilator 100 are defined. More specifically, the direction perpendicular to the top plate 50 and the bottom plate 51 is defined as the up-down direction, the direction perpendicular to the left plate 52 and the right plate 53 is defined as the left-right direction, and the direction perpendicular to the front plate 54 and the rear plate 55 is defined as the front-rear direction. The definitions of these directions are for the purpose of explaining the embodiment, and do not limit the arrangement or orientation of the device and fixtures of the present disclosure.

[0015] The heat exchange type ventilator 100 maintains a comfortable indoor air environment by ventilating the room with an intake airflow, which is a flow of air supplied from the outside to the room, and an exhaust airflow, which is a flow of air exhausted from the room to the outside. The heat exchange type ventilator 100 also reduces the temperature difference between the air taken into the room and the air inside the room through heat exchange between the intake airflow and the exhaust airflow, thereby reducing the load on the air conditioning in the room. The heat exchange type ventilator 100 is installed, for example, in the space above the ceiling.

[0016] As shown in Figures 1 to 5, the heat exchange type ventilation device 100 comprises a casing 5, an air path switching device 11, a control device 12, an intake air blower 3, an exhaust air blower 4, a heat exchanger 80, an inspection hatch section 28, a heat exchanger cover 17, an exhaust filter unit 110, an exhaust filter cover 19, an intake air filter unit 120, an intake air filter cover 29, an exhaust filter fixing section 130, and an intake air filter fixing section 140.

[0017] 1, the casing 5 is configured in a hexahedral box shape including a top plate 50, a bottom plate 51, a left plate 52, a right plate 53, a front plate 54, and a rear plate 55. As shown in Figs. 3 and 4, an intake air passage 5A through which an intake air current flows and an exhaust air passage 5B through which an exhaust air current flows are formed inside the casing 5. The exhaust air passage 5B has a first exhaust air passage 5Ba that passes through the heat exchanger 80 and a second exhaust air passage 5Bb that does not pass through the heat exchanger 80.

[0018] The left side plate 52 is provided with an outdoor suction section 7 and an outdoor outlet section 10. The right side plate 53 is provided with an indoor suction section 8 and an indoor outlet section 9.

[0019] An intake airflow flows through the intake air duct 5A. The intake airflow passes through the heat exchanger 80 from the outdoor intake section 7 and is supplied to the room from the indoor blowing section 9 as intake air. An exhaust airflow flows through the exhaust air duct 5B. The exhaust airflow is an airflow sucked in from the indoor intake section 8 and discharged to the outside from the outdoor blowing section 10 as exhaust air. The first exhaust air duct 5Ba passes from the indoor intake section 8 through the exhaust heat exchange air duct opening 13, passes through the heat exchanger 80 and the exhaust blower 4, and is discharged from the outdoor blowing section 10. The second exhaust air duct 5Bb passes from the indoor intake section 8 through the bypass exhaust air duct opening 14, passes through the intake air blower 3 and the exhaust blower 4, and is discharged from the outdoor blowing section 10. The exhaust heat exchange air duct opening 13 and the bypass exhaust air duct opening 14 are openings provided in the casing. Moreover, the supply air duct 5A and the exhaust air duct 5B are configured independently within the heat exchanger type ventilation device 100 so that the supply air and the exhaust air are not mixed.

[0020] Air-path switching device 11 switches between first exhaust air passage 5Ba and second exhaust air passage 5Bb. Specifically, air-path switching device 11 selects between exhaust heat exchange air passage opening 13 and bypass exhaust air passage opening 14.

[0021] The control device 12 controls the heat exchange type ventilation device 100. Specifically, the control device 12 controls the power supply of the heat exchange type ventilation device 100 and the air-path switching device 11. The control device 12 is connected to the intake air blower 3 and the exhaust air blower 4 by, for example, lead wires.

[0022] The intake fan 3 includes an electric motor and a blade member that is rotated by the driving of the electric motor. The intake fan 3 supplies outdoor air into the room to generate an intake airflow in the intake airflow duct 5A.

[0023] Exhaust fan 4 includes an electric motor and a blade member that is rotated by the driving of the electric motor. Exhaust fan 4 exhausts indoor air to the outside of the room, and generates an exhaust flow in exhaust airflow duct 5B.

[0024] The heat exchanger 80 exchanges heat between the supply airflow flowing in the supply air duct 5A and the exhaust airflow flowing in the exhaust air duct 5B. The heat exchanger 80 is disposed at the intersection of the supply air duct 5A and the exhaust air duct 5B. In the embodiment, the shape of the heat exchanger 80 is a hexagonal prism. In the embodiment, the heat exchanger 80 is a counterflow type heat exchanger in which the flow direction of the supply airflow and the flow direction of the exhaust airflow are opposite to each other. The heat exchanger 80 has a supply air inflow surface 81 into which the supply airflow flows and a supply air outflow surface 82 from which the supply airflow flows out. The heat exchanger 80 also has an exhaust inflow surface 83 into which the exhaust airflow flows in and an exhaust outflow surface 84 from which the exhaust airflow flows out.

[0025] Inspection opening 28 is provided in bottom plate 51, and communicates with the inside of casing 5. Inspection opening 28 is provided with heat exchanger cover 17, exhaust filter cover 19, and intake filter cover 29. In addition, exhaust filter unit 110 and intake filter unit 120 are inserted and removed through inspection opening 28.

[0026] The heat exchanger cover 17 is provided inside the casing 5 from the inspection opening 28, and supports the heat exchanger 80. The heat exchanger cover 17 also has a first filter fixing portion 131 that fixes the exhaust filter unit 110. The configuration of the first filter fixing portion 131 will be described later.

[0027] 4, exhaust filter unit 110 is provided in exhaust airflow duct 5B upstream of heat exchanger 80. In this embodiment, exhaust filter unit 110 is provided so as to contact exhaust air inlet surface 83.

[0028] The exhaust filter unit 110 has an exhaust filter 111 and an exhaust filter frame 112 that supports the filter. The configuration of the exhaust filter unit 110 will be described later.

[0029] The exhaust filter cover 19 is provided inside the casing 5 from the inspection opening 28. As shown in Fig. 5, the exhaust filter cover 19 is provided detachably to the casing 5, and is removed from the casing 5 when the exhaust filter unit 110 is to be installed or maintained.

[0030] 4, the intake air filter unit 120 is provided upstream of the heat exchanger 80 in the intake air duct 5A. In this embodiment, the intake air filter unit 120 is provided near the intake air inlet surface 81. The intake air filter unit 120 has an intake air filter and an intake air filter frame that supports the intake air filter.

[0031] Air intake filter cover 29 is provided inside casing 5 from inspection hatch 28 with air intake filter unit 120 attached inside casing 5. As shown in Fig. 5, air intake filter unit 120 is provided detachably with respect to casing 5, and is removed from casing 5 when installing or maintaining air intake filter unit 120.

[0032] The exhaust filter fixing part 130 fixes the exhaust filter unit 110 inside the casing 5. The exhaust filter fixing part 130 includes a first filter fixing part 131 and a second filter fixing part 132. The configuration of the exhaust filter fixing part 130 will be described later.

[0033] The intake air filter fixing part 140 is provided inside the casing 5. The intake air filter fixing part 140 fixes the intake air filter unit 120 inside the casing 5.

[0034] FIG. 6 is a perspective view of the exhaust filter 111 of the heat exchange type ventilation device 100 according to the embodiment when the exhaust filter 111 is not elastically deformed. FIG. 7 is a perspective view of the exhaust filter unit 110 when the exhaust filter 111 of the heat exchange type ventilation device 100 according to the embodiment is not elastically deformed. FIG. 8 is a perspective view of the exhaust filter unit 110 when the exhaust filter 111 of the heat exchange type ventilation device 100 according to the embodiment is elastically deformed. FIG. 9 is an enlarged view of the vicinity of the first cutout portion 160 of the exhaust filter frame 112 of the heat exchange type ventilation device 100 according to the embodiment. Also, in FIG. 8, the direction of the load applied to the exhaust filter unit 110 is indicated by an arrow. The configuration of the exhaust filter unit 110 and the elastic deformation of the exhaust filter unit 110 will be described with reference to FIGS. 6 to 9.

[0035] As shown in FIG. 6, the exhaust filter unit 110 has an exhaust filter 111 and an exhaust filter frame 112 that supports the exhaust filter 111.

[0036] The exhaust filter 111 is made of a material capable of elastic deformation. For example, the exhaust filter 111 is made of a rectangular nonwoven fabric. As shown in FIG. 6, the exhaust filter 111 has a left side surface 150, a right side surface 151, an upper side surface 152, a lower side surface 153, a rear side surface 154, and a front side surface 155. The right side surface 151 is a surface facing the left side surface 150. The lower side surface 153 is a surface facing the upper side surface 152. The front side surface 155 is a surface facing the rear side surface 154. The upper side surface 152 and the lower side surface 153 have a larger area than the rear side surface 154 and the front side surface 155.

[0037] In the embodiment, the right side surface 151 of the exhaust filter 111 is provided so as to contact the exhaust inlet surface 83 of the heat exchanger 80. With this configuration, the heat exchanger 80 can support the exhaust filter unit 110 in the left-right direction, and therefore the heat exchanger-type ventilator 100 has the advantage of being able to stably support the exhaust filter 111.

[0038] 7, the exhaust filter frame 112 is provided on the side of the exhaust filter 111 and holds the exhaust filter 111. Specifically, the exhaust filter frame 112 is provided on an upper side 152, a lower side 153, a rear side 154, and a front side 155 of the exhaust filter 111. Further, of the exhaust filter frame 112, the frame provided on the lower side 153 is provided with a first cutout portion 160. Further, of the exhaust filter frame 112, the frame provided on the upper side 152 is provided with a second cutout portion 170.

[0039] 8, when a load is applied to the exhaust filter unit 110 in a direction perpendicular to the lower surface 153, the lower surface 153 and the exhaust filter frame 112 provided on the lower surface 153 are deformed. Because the exhaust filter frame 112 provided on the lower surface 153 has a first cutout portion 160, applying a load to the exhaust filter unit 110 can cause the exhaust filter unit 110 to deform.

[0040] 7, first cutout portion 160 of exhaust filter unit 110 is provided on lower side surface 153. With this configuration, lower side surface 153 has a larger area than rear side surface 154 and front side surface 155, making it easier to deform exhaust filter unit 110.

[0041] Also, in the embodiment, the first cutout portion 160 and the second cutout portion 170 are provided in the exhaust filter frame 112 on different sides of the exhaust filter 111. With this configuration, the exhaust filter unit 110 can be folded, making it easy to carry the exhaust filter unit 110. Also, in the embodiment, the first cutout portion 160 and the second cutout portion 170 are provided in the exhaust filter frame 112 on opposing sides of the exhaust filter 111, so the filter unit 110 can be folded in half.

[0042] As shown in Fig. 9, a knob portion 180 is provided on the exhaust filter frame 112 near the first cutout portion 160. The knob portion 180 is a member provided on each of the front fixing portion 190 and the rear fixing portion 191 so as to protrude in a direction perpendicular to the lower surface 153. In other words, the first cutout portion 160 is provided between the front knob portion 180 and the rear knob portion 180 in the front-rear direction. A person performing installation or maintenance of the heat exchanger type ventilator 100 can apply a load to the exhaust filter unit 110 in a direction perpendicular to the lower surface 153 by pushing the knob portion 180 upward.

[0043] Fig. 10 is an enlarged view of the periphery of the exhaust filter unit 110 in the BB cross-sectional view of Fig. 3 of the heat exchanger type ventilation device 100 according to the embodiment. Fig. 11 is an enlarged perspective view of the periphery of the exhaust filter fixing part 130 of the heat exchanger type ventilation device 100 according to the embodiment. Fig. 12 is a diagram showing the configuration of the second filter fixing part 132 of the exhaust filter fixing part 130 of the heat exchanger type ventilation device 100 according to the embodiment. The configuration of the exhaust filter fixing part 130 and the method of attaching the exhaust filter unit 110 to the inner surface of the casing 5 will be described with reference to Figs. 10 to 12.

[0044] 10 and 11 , the exhaust filter unit 110 is fixed to the inner surface of the casing 5 by the exhaust filter fixing part 130. More specifically, the lower surface of the exhaust filter 111, i.e., the lower side surface 153 of the exhaust filter 111, is fixed by the first filter fixing part 131. Moreover, the upper surface of the exhaust filter 111, i.e., the upper side surface 152 of the exhaust filter 111, is fixed by the second filter fixing part 132.

[0045] The first filter fixing portion 131 fixes a lower side surface 153, which is one side surface of the exhaust filter 111. The first filter fixing portion 131 is, for example, a frame-shaped member. The first filter fixing portion 131 is provided so as to protrude from the heat exchanger cover 17. As shown in FIG. 11, the first filter fixing portion 131 has a front fixing portion 190 and a rear fixing portion 191. As shown in FIG. 12, a gap portion 193 is provided between the front fixing portion 190 and the rear fixing portion 191. The first cutout portion 160 of the exhaust filter frame 112 is provided between the front fixing portion 190 and the rear fixing portion 191. That is, the first cutout portion 160 is provided so as to be located within the gap portion 193. Therefore, the front fixing portion 190 and the rear fixing portion 191 support the exhaust filter unit 110 from the front side and the rear side, respectively, with the exhaust lower side surface 153 fixed.

[0046] The second filter fixing part 132 fixes an upper surface 152 which is one side surface of the exhaust filter 111. The second filter fixing part 132 is, for example, a frame-shaped member.

[0047] When installing the exhaust filter unit 110 inside the casing 5, the exhaust filter is elastically deformed in a direction perpendicular to the lower surface 153, and the position of the first cutout portion 160 is aligned with the gap portion 193 between the front fixing portion 190 and the rear fixing portion 191, and then the load is removed.

[0048] By configuring the heat exchanger type ventilator 100 so that the first cutout portion 160 is provided between the front fixing portion 190 and the rear fixing portion 191, the exhaust filter unit 110 can be fixed without floating away from the exhaust filter fixing portion 130, compared to when the first cutout portion 160 is fixed only on either the front or rear side, and therefore the exhaust filter unit 110 can be fixed stably.

[0049] In the embodiment, the front fixing part 190 and the rear fixing part 191 protrude in a direction perpendicular to the lower surface. In addition, a front end 200, which is an end of the front fixing part 190 opposite the first notch part 160, is provided at an incline with respect to a direction perpendicular to the lower surface 153. In addition, a rear end 201, which is an end of the rear fixing part 191 opposite the first notch part 160, is provided at an incline with respect to a direction perpendicular to the lower surface 153. This configuration provides the effect that the front fixing part 190 and the exhaust filter frame 112, and the rear fixing part 191 and the exhaust filter frame 112 are not caught when the exhaust filter unit 110 is attached to or detached from the casing 5.

[0050] In the embodiment, the length in the front-rear direction of the first cutout portion 160 is shorter than the length in the front-rear direction of the gap between the front fixing portion 190 and the rear fixing portion 191. With this configuration, the heat exchanger ventilator 100 has the advantage of being able to stably support the exhaust filter unit 110.

[0051] In the embodiment, the first cutout portion 160 is provided forward of the rear fixing portion 191 and rearward of the front fixing portion 190. With this configuration, the heat exchanger ventilator 100 has the advantage of being able to stably support the exhaust filter unit 110.

[0052] Fig. 13 is a flow chart showing the procedure for attaching the exhaust filter unit 110 of the heat exchanger type ventilation device according to the embodiment. Fig. 14 is a flow chart showing the procedure for fixing the exhaust filter unit 110 of the heat exchanger type ventilation device 100 according to the embodiment. Fig. 14 is a diagram specifically explaining the procedure of step S103 in Fig. 13 in detail. The procedure for attaching the exhaust filter unit 110 to the heat exchanger type ventilation device 100 will be explained using Figs. 13 and 14. The processing in Figs. 13 and 14 is performed by a person or a machine.

[0053] Step S101 is performed after the parts of the heat exchanger type ventilator 100 are manufactured. In step S101, the exhaust filter cover 19 is opened and removed from the casing 5. Step S101 ends when the exhaust filter cover 19 is removed from the casing 5 and the inspection opening portion 28 is partially exposed.

[0054] Step S102 is performed after the processing of step S101. In step S102, the exhaust filter unit 110 is inserted into the casing 5. More specifically, the exhaust filter unit 110 is inserted into the casing 5 from a portion of the inspection opening portion 28 exposed by the exhaust filter cover 19. When the exhaust filter unit 110 is inserted into the casing 5, the processing of step S102 is terminated.

[0055] Step S103 is performed after the process of step S102. In step S103, the exhaust filter unit 110 is fixed inside the casing 5. More specifically, the process of step S103 includes the processes of steps S201 to S203, as shown in Fig. 14. The processes of steps S201 to S203 will be described respectively.

[0056] Step S201 is performed after the processing of step S102. In step S201, a load is applied to exhaust filter unit 110 in a direction perpendicular to lower surface 153, causing elastic deformation. When exhaust filter unit 110 is elastically deformed, the processing of step S201 ends.

[0057] Step S202 is performed after step S201. In step S202, the position of the first cutout portion 160 of the exhaust filter frame 112 in the exhaust filter unit 110 is moved so as to be located between the front fixing portion 190 and the rear fixing portion 191. When the exhaust filter unit 110 has been moved so as to satisfy the condition, the process of step S202 ends.

[0058] Step S203 is performed after the process of step S202. In step S203, the load applied in step S201 to exhaust filter unit 110 is removed. When the load applied to exhaust filter unit 110 is removed, the process of step S203 ends.

[0059] When the process of step S203 is completed, the process of attaching the exhaust filter unit 110 is completed.

[0060] As described above, the heat exchange type ventilator 100 according to the embodiment includes the intake air blower 3 which supplies outdoor air into the room and generates an intake airflow in the intake air duct 5A, the exhaust air blower 4 which exhausts indoor air to the outside and generates an exhaust airflow in the exhaust air duct 5B, the casing 5 in which the intake air duct 5A and the exhaust air duct 5B are formed, the heat exchanger 80 which exchanges heat between the intake airflow and the exhaust airflow, a filter which is capable of elastic deformation (corresponding to the exhaust filter 111), and a filter frame (corresponding to the exhaust filter frame 112) which is a frame provided on a side surface of the filter and in which the first cutout portion 160 which is a discontinuous portion is provided on the frame provided on the first surface (corresponding to the lower surface 153) which is one side surface of the filter, and A filter unit (corresponding to exhaust filter unit 110) is provided upstream of heat exchanger 80 in exhaust air duct 5A or upstream of heat exchanger 80 in exhaust air duct 5B, a first filter fixing part 131 for fixing the first surface, a second filter fixing part 132 for fixing one side of the filter different from the first surface (corresponding to upper side surface 152), and an inspection opening part 28 that communicates with the inside of casing 5 and into which the filter unit can be inserted, and first filter fixing part 131 includes one fixing part (corresponding to front fixing part 190) that supports one side of first cutout part 160 with the first surface fixed, and the other fixing part (corresponding to rear fixing part 191) that supports the opposite side to the one side of first cutout part 160. With this configuration, the heat exchange type ventilation device 100 according to the embodiment has an effect of improving the workability when attaching a filter compared to the configuration disclosed in Patent Document 1.

[0061] The method of mounting the filter in the heat exchanger-type ventilation device 100 according to the embodiment includes a first step of inserting a filter unit (corresponding to exhaust filter unit 110) having an elastically deformable filter (corresponding to exhaust filter 111) and a filter frame (corresponding to exhaust filter frame 112) provided on a side of the filter and having a notch (corresponding to first notch 160) provided in the frame provided on a first surface (corresponding to lower surface 153) which is one side of the filter, into casing 5 from inspection opening 28 communicating with the inside of casing 5 which forms intake air passage 5A and exhaust air passage 5B therein; and a second step of applying a load to the filter unit in a direction perpendicular to the first surface. The method includes a second step in which the filter is elastically deformed by pressing the filter against the heat exchanger 80, which is different from the first side (corresponding to the upper side 152) of the filter, which is performed after the first and second steps, and is fixed by the second filter fixing part 132 provided upstream of the heat exchanger 80 that exchanges heat between the intake air flow and the exhaust air flow in the intake air duct 5A, or upstream of the heat exchanger 80 in the exhaust air duct 5B, and a fourth step in which the load applied in the second step is removed and a notch is provided between one fixing part (corresponding to the front fixing part 190) and the other fixing part (corresponding to the rear fixing part 191) of the first filter fixing part 131. With this configuration, the method of installing the filter in the heat exchanger type ventilation device 100 according to the embodiment has an effect of improving the workability when installing the filter, compared with the configuration disclosed in Patent Document 1.

[0062] Furthermore, as an additional configuration, the heat exchanger-type ventilator 100 according to the embodiment may have a filter unit (corresponding to the supply air filter unit 120) provided upstream of the heat exchanger 80 in the supply air duct 5A so as to be in contact with the supply air inflow surface 81 into which the supply airflow of the heat exchanger 80 flows. This additional configuration enables the heat exchanger 80 to support the exhaust filter unit 110 in the left-right direction, thereby providing the effect that the heat exchanger-type ventilator 100 can stably support the exhaust filter 111.

[0063] Furthermore, as an additional configuration, the heat exchanger-type ventilator 100 according to the embodiment has a filter unit (corresponding to the exhaust filter unit 110) provided upstream of the heat exchanger 80 in the exhaust air duct 5B so as to be in contact with the exhaust inflow surface 83 into which the exhaust flow of the heat exchanger 80 flows. This additional configuration enables the heat exchanger 80 to support the exhaust filter unit 110 in the left-right direction, so that the heat exchanger-type ventilator 100 has the effect of being able to stably support the exhaust filter 111.

[0064] Furthermore, as an additional configuration, the heat exchanger-type ventilation device 100 according to the embodiment has a second cutout portion 170, which is a discontinuous portion, provided on a surface (corresponding to the upper surface 152) different from the first surface (corresponding to the lower surface 153) of the filter frame (corresponding to the exhaust filter frame 112). With this additional configuration, the heat exchanger-type ventilation device 100 can fold the exhaust filter unit 110 in half, which has the effect of making the exhaust filter unit 110 easy to carry.

[0065] In addition, the heat exchanger ventilator 100 according to the embodiment has an additional structure in which the filter (corresponding to the exhaust filter 111) has a plurality of sides, and the first side (corresponding to the lower side 153) is the side with the largest area of ​​the filter. This additional structure makes it possible for the heat exchanger ventilator 100 to easily deform the exhaust filter unit 110.

[0066] Furthermore, in the heat exchanger ventilator 100 according to the embodiment, as an additional configuration, an end portion (corresponding to the front end portion 200) of one fixing portion (corresponding to the front fixing portion 190) opposite the first cutout portion 160 and an end portion (corresponding to the rear fixing portion 191) opposite the first cutout portion 160 are provided at an incline with respect to a direction perpendicular to the first surface. This additional configuration has the effect of preventing the front fixing portion 190 and the exhaust filter frame 112, and the rear fixing portion 191 and the exhaust filter frame 112 from getting caught when the exhaust filter unit 110 is attached to or detached from the casing 5.

[0067] Furthermore, as an additional configuration, the heat exchanger ventilator 100 according to the embodiment has a knob 180 that protrudes in a direction perpendicular to the first surface (corresponding to the lower surface 153) on the filter frame (corresponding to the exhaust filter frame 112). This additional configuration provides the effect that the heat exchanger ventilator 100 according to the embodiment can apply a load to the exhaust filter unit 110 in a direction perpendicular to the first surface by pushing the knob 180 upward.

[0068] Furthermore, in the method of attaching the filter in the heat exchanger-type ventilator 100 according to the embodiment, as an additional configuration, in the second step, a load is applied in a direction perpendicular to the first surface (corresponding to the lower surface 153) by pressing the knob portion protruding in a direction perpendicular to the first surface. With this additional configuration, the method of attaching the filter in the heat exchanger-type ventilator 100 according to the embodiment has the effect of being able to apply a load to the exhaust filter unit 110 in a direction perpendicular to the first surface by pressing the knob portion 180 upward.

[0069] In the heat exchange type ventilation device according to the embodiment, the casing is a hexahedron, but this is not limited thereto. Any configuration may be used as long as an intake air passage and an exhaust air passage are formed inside.

[0070] In addition, in the heat exchange type ventilation device of the embodiment, the exhaust air duct has a first exhaust air duct that passes through a heat exchanger and a second exhaust air duct that does not pass through a heat exchanger, and the two exhaust air ducts are switched by an air duct switching device, but this is not limited to this. A configuration that does not have a second air duct and an air duct switching device may also be used.

[0071] In addition, in the heat exchange type ventilation device according to the embodiment, the exhaust filter frame has a configuration having a first cutout portion and a second cutout portion, but this is not limited thereto. The filter frame may have one or more cutout portions.

[0072] In addition, the heat exchange type ventilation device according to the embodiment has a configuration in which a knob is provided on the exhaust filter frame, but this is not limited thereto. A configuration without a knob may also be used.

[0073] In addition, in the heat exchange type ventilation device of the embodiment, the exhaust filter is rectangular, but is not limited to this. The exhaust filter does not have to be rectangular, but may be made of a material that can capture foreign matter and is elastically deformable.

[0074] In addition, in the heat exchange type ventilation device of the embodiment, the exhaust air inlet surface of the heat exchanger and the exhaust filter unit are in contact with each other, but this is not limited thereto. The exhaust filter unit may be provided upstream of the heat exchanger in the exhaust air duct.

[0075] Furthermore, the filter unit described in the present embodiment is not limited to an exhaust filter unit, but may be an intake filter unit. In that case, the intake filter unit may be provided upstream of the heat exchanger in the intake air duct.

[0076] In addition, in the heat exchange type ventilation device of the embodiment, the filter frame provided on the underside of the filter has the first cutout portion, but this is not limited thereto. It is sufficient that the filter provided on one side of the filter has the first cutout portion.

[0077] In addition, in the heat exchange device of the embodiment, the second filter fixing part has a front fixing part and a rear fixing part, but is not limited to this. The second filter fixing part may be continuous. The second filter fixing part may be configured to fix the exhaust filter frame of the exhaust filter unit from both the front and rear sides.

[0078] Various aspects of the present disclosure are summarized below as appendices.

[0079] (Appendix 1) an intake air blower that supplies outdoor air to the room and generates an intake air flow in the intake air duct; an exhaust fan that exhausts indoor air to the outside and generates an exhaust flow in an exhaust air duct; a casing in which the intake air passage and the exhaust air passage are formed; a heat exchanger for exchanging heat between the intake air flow and the exhaust air flow; a filter unit including an elastically deformable filter and a frame provided on a side surface of the filter, the frame being provided on a first surface, which is one side surface of the filter, and a first cutout portion, which is a discontinuous portion, and the filter unit is provided upstream of the heat exchanger in the supply air duct or upstream of the heat exchanger in the exhaust air duct; A first filter fixing portion that fixes the first surface; a second filter fixing portion that fixes one side of the filter different from the first side; an access hole communicating with the inside of the casing and into which the filter unit can be inserted; having The first filter fixing portion includes a one-side fixing portion that supports one side of the first cutout portion in a state in which the first surface is fixed, and a left-side fixing portion that supports the side opposite to the one side of the first cutout portion. Heat exchange type ventilation system. (Appendix 2) The filter unit is provided upstream of the heat exchanger in the supply air duct so as to be in contact with a supply air inlet surface of the heat exchanger into which the supply airflow flows. Attachment 1: A heat exchange type ventilation device. (Appendix 3) The filter unit is provided upstream of the heat exchanger in the exhaust air duct so as to be in contact with an exhaust inlet surface of the heat exchanger into which the exhaust air flows. Attachment 1: A heat exchange type ventilation device. (Appendix 4) A second cutout portion that is a discontinuous portion is provided in a frame provided on a surface of the filter frame different from the first surface. 4. A heat exchange type ventilation device according to any one of claims 1 to 3. (Appendix 5) the filter has multiple sides; The first surface is the surface having the largest area among the side surfaces of the filter. 5. A heat exchange type ventilation device according to any one of claims 1 to 4. (Appendix 6) An end portion of the first first-surface fixing portion opposite to the notch portion and an end portion of the second first-surface fixing portion opposite to the notch portion are provided inclined with respect to a direction perpendicular to the first surface. 6. A heat exchange type ventilation device according to any one of claims 1 to 5. (Appendix 7) The filter frame is provided with a knob portion that protrudes in a direction perpendicular to the first surface. 7. A heat exchange type ventilation device according to any one of claims 1 to 6. (Appendix 8) a first step in which a filter unit having an elastically deformable filter and a filter frame provided on a side surface of the filter, the filter frame being provided on a first surface, which is one side surface of the filter, and having a notch provided in the frame, is inserted into the casing through an access opening communicating with the inside of the casing, the casing forming an intake air passage and an exhaust air passage therein; a second step of applying a load to the filter unit in a direction perpendicular to the first surface, thereby elastically deforming the filter; a third step, which is carried out after the first step and the second step are completed, in which one side surface of the filter different from the first side is fixed by a second filter fixing part provided upstream of a heat exchanger that exchanges heat between the intake air flow and the exhaust air flow in the intake air duct, or upstream of the heat exchanger in the exhaust air duct; a fourth step, which is carried out after the third step, in which the load applied in the second step is removed and the notch is provided between the one fixing portion and the other fixing portion of the first filter fixing portion; A method for installing a filter in a heat exchange type ventilation system having the above structure. (Appendix 9) The filter frame is provided with a knob portion protruding in a direction perpendicular to the first surface, In the second step, a load is applied in a direction perpendicular to the first surface by pressing the knob. A method for installing a filter in a heat exchange type ventilation device described in Appendix 8. [Explanation of symbols]

[0080] 3 intake air blower, 4 exhaust air blower, 5 casing, 5A intake air duct, 5B exhaust air duct, 5Ba first exhaust air duct, 5Bb second exhaust air duct, 7 outdoor intake section, 8 indoor intake section, 9 indoor outlet section, 10 outdoor outlet section, 11 air duct switching device, 12 control device, 13 exhaust heat exchange air duct opening, 14 bypass exhaust air duct opening, 17 heat exchanger cover, 19 exhaust filter cover, 28 inspection port section, 29 intake air filter cover, 50 top plate, 51 bottom plate, 52 left side plate, 53 right side plate, 54 front plate, 55 rear plate, 80 heat exchanger, 81 intake air inlet surface, 82 intake air outlet surface, 83 exhaust air inlet surface, 84 exhaust air outlet surface, 100 heat exchange type ventilation device, 110 exhaust filter unit, 111 Exhaust filter, 112 exhaust filter frame, 120 intake filter unit, 130 exhaust filter fixing portion, 131 first filter fixing portion, 132 second filter fixing portion, 140 intake filter fixing portion, 150 left side surface, 151 right side surface, 152 upper side surface, 153 lower side surface, 154 rear side surface, 155 front side surface, 160 first cutout portion, 170 second cutout portion, 180 knob portion, 190 front fixing portion, 191 rear fixing portion, 193 gap portion, 200 front end portion, 201 rear end portion.

Claims

1. an intake air blower that supplies outdoor air to the room and generates an intake air flow in the intake air duct; an exhaust fan that exhausts indoor air to the outside and generates an exhaust flow in an exhaust air duct; a casing in which the intake air passage and the exhaust air passage are formed; a heat exchanger for exchanging heat between the intake air flow and the exhaust air flow; a filter unit including an elastically deformable filter and a frame provided on a side surface of the filter, the frame being provided on a first surface, which is one side surface of the filter, and a first cutout portion, which is a discontinuous portion, and the filter unit is provided upstream of the heat exchanger in the supply air duct or upstream of the heat exchanger in the exhaust air duct; A first filter fixing portion that fixes the first surface; a second filter fixing portion that fixes one side of the filter different from the first side; an access hole communicating with the inside of the casing and into which the filter unit can be inserted; having The first filter fixing portion includes a first fixing portion that supports one side of the first cutout portion in a state in which the first surface is fixed, and an other fixing portion that supports the side opposite to the one side of the first cutout portion. Heat exchange type ventilation system.

2. The filter unit is provided upstream of the heat exchanger in the supply air duct so as to be in contact with a supply air inlet surface of the heat exchanger into which the supply airflow flows. The heat exchange type ventilation system according to claim 1.

3. The filter unit is provided upstream of the heat exchanger in the exhaust air duct so as to be in contact with an exhaust inlet surface of the heat exchanger into which the exhaust air flows. The heat exchange type ventilation system according to claim 1.

4. A second cutout portion that is a discontinuous portion is provided in a frame provided on a surface of the filter frame different from the first surface. The heat exchange type ventilation system according to claim 1.

5. the filter has multiple sides; The first surface is the surface having the largest area among the side surfaces of the filter. The heat exchange type ventilation system according to claim 1.

6. An end portion of the right fixing portion opposite to the first cutout portion and an end portion of the left fixing portion opposite to the first cutout portion are provided inclined with respect to a direction perpendicular to the first surface. The heat exchange type ventilation system according to claim 1.

7. The filter frame is provided with a knob portion that protrudes in a direction perpendicular to the first surface. The heat exchange type ventilation system according to claim 1.

8. a first step in which a filter unit having an elastically deformable filter and a filter frame provided on a side surface of the filter, the filter frame being provided on a first surface, which is one side surface of the filter, and having a notch provided in the frame, is inserted into the casing through an access opening communicating with the inside of the casing, the casing forming an intake air passage and an exhaust air passage therein; a second step of applying a load to the filter unit in a direction perpendicular to the first surface, thereby elastically deforming the filter; a third step, which is carried out after the first step and the second step are completed, in which one side surface of the filter different from the first side is fixed by a second filter fixing part provided upstream of a heat exchanger that exchanges heat between the intake air flow and the exhaust air flow in the intake air duct, or upstream of the heat exchanger in the exhaust air duct; a fourth step, which is carried out after the third step, in which the load applied in the second step is removed and the notch is provided between the one fixing portion and the other fixing portion of the first filter fixing portion; A method for installing a filter in a heat exchange type ventilation system having the above structure.

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