Heat exchange type ventilating device and fitting method for sensor of heat exchange type ventilating device

Abstract

To improve workability when fitting a sensor in a heat exchange type ventilating device.SOLUTION: A heat exchange type ventilating device according to the present disclosure comprises: an air supply blower for generating an air supply flow in an air supply passage by supplying outdoor air to an indoor space; an air exhaust blower for generating an air exhaust flow in an air exhaust passage by exhausting indoor air to an outdoor space; a casing inside which the air supply passage and the air exhaust passage are formed; a guide rail detachably installed on an inner surface of the casing; a heat exchanger for exchanging heat between the air supply flow and the air exhaust flow, and supported in the casing movably along the guide rail; a sensor attached to the guide rail, and for detecting the state of air in the air supply flow or the air exhaust flow; and an inspection port part communicating with the inside of the casing.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a heat exchanger ventilation device and a method for mounting a sensor in a heat exchanger ventilation device. [Background technology]

[0002] A conventional heat exchange type ventilation device is a heat exchange type ventilation fan disclosed in Patent Document 1. In the heat exchange type ventilation fan disclosed in Patent Document 1, a sensor provided in the intake air duct or exhaust air duct of the heat exchange type ventilation fan detects the state of the air in the space in which the heat exchange type ventilation fan is installed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-34223 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the position where the sensor is attached is not limited in the heat exchange type ventilation fan disclosed in Patent Document 1. For example, if the sensor is provided on the inner surface of the casing, there is a problem that the workability of attaching the sensor is poor.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to improve the workability when installing a sensor, compared to the configuration disclosed in Patent Document 1. [Means for solving the problem]

[0006] The heat exchange type ventilation device disclosed herein comprises an intake air blower that supplies outside air into the room and generates an intake air flow in the intake air duct, an exhaust air blower that exhausts indoor air to the outside and generates an exhaust air flow in the exhaust air duct, a casing in which the intake air duct and the exhaust air duct are formed, a guide rail that is detachably fixed to the inner surface of the casing, a heat exchanger that exchanges heat between the intake air flow and the exhaust air flow and is supported within the casing so as to be freely movable along the guide rail, a sensor that is attached to the guide rail and detects the condition of the air in the intake air flow or the exhaust air flow, and an inspection hatch that communicates with the inside of the casing.

[0007] In addition, the method of installing a sensor in a heat exchange type ventilation device disclosed herein includes a casing having an intake air passage through which an intake air current flows and an exhaust air passage through which an exhaust air current flows, a guide rail removably fixed to the inner surface of the casing, a heat exchanger that exchanges heat between the intake air current and the exhaust air current and is supported within the casing so as to be freely movable along the guide rail, a sensor that is attached to the guide rail and detects the air condition of the intake air current or the exhaust air current, and an inspection hatch that communicates with the inside of the casing, and includes a first step of installing the sensor in the guide rail, a second step of inserting the guide rail into the inside of the casing from the inspection hatch, a third step of removably fixing the guide rail to the inner surface of the casing, and a fourth step of supporting the heat exchanger so as to be freely movable along the guide rail. Effect of the Invention

[0008] The heat exchanger type ventilation device and the method for attaching a sensor to a heat exchanger type ventilation device disclosed herein have the advantage of being able to improve the workability when attaching a sensor, compared to the configuration disclosed in Patent Document 1. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view showing a state in which a top plate of the heat exchange type ventilation device according to the first embodiment has been removed. [Diagram 2]FIG. 2 is a top view showing the heat exchange type ventilation device according to the first embodiment with the top plate removed. [Diagram 3] FIG. 2 is a perspective view showing a state in which a bottom plate and a maintenance cover of the heat exchanger-type ventilation device according to the first embodiment have been removed. [Figure 4] FIG. 2 is a perspective view showing a heat exchanger of the heat exchange type ventilation device according to the first embodiment. [Diagram 5] FIG. 2 is a front view showing the heat-exchange type ventilation device according to the first embodiment with a maintenance cover removed. [Figure 6] FIG. 2 is a partial enlarged view of the vicinity of a right guide rail in a front view of the heat-exchange type ventilation device according to the first embodiment. [Figure 7] FIG. 2 is a diagram showing a configuration of a sensor of the heat exchange type ventilation device according to the first embodiment. [Figure 8] FIG. 2 is a partially enlarged perspective view of the heat exchanger ventilation device according to the first embodiment, showing an enlarged view of the vicinity of a sensor. [Figure 9] FIG. 2 is a diagram showing a schematic view of the inside of the heat exchange type ventilation device according to the first embodiment. [Figure 10] 5 is a flowchart showing a procedure for replacing a sensor in the heat exchange type ventilation device according to the first embodiment. [Figure 11] FIG. 11 is a diagram showing a schematic view of the inside of a heat exchange type ventilation device according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 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.

[0011] Embodiment 1 FIG. 1 is a perspective view showing a state where a top plate 9 of the heat exchanger type ventilation device 100 according to the first embodiment is removed. FIG. 2 is a top view showing a state where a top plate 9 of the heat exchanger type ventilation device 100 according to the first embodiment is removed. FIG. 3 is a perspective view showing a state where a bottom plate 10 and a maintenance cover 11 of the heat exchanger type ventilation device 100 according to the first embodiment are removed. In addition, in FIG. 2, the flow of air inside 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. 3.

[0012] In the drawings of the present disclosure, the up-down, left-right, and front-rear directions of the heat exchange ventilator are defined. More specifically, the direction perpendicular to the top plate 9 and the bottom plate 10 is defined as the up-down direction, the direction perpendicular to the left plate 30 and the right plate 40 is defined as the left-right direction, and the direction perpendicular to the front plate 50 and the rear plate 60 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 parts of the present disclosure.

[0013] 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.

[0014] As shown in Figures 1 to 3, the heat exchange type ventilation device 100 has a casing 5, an inspection hatch section 13, a maintenance cover 11, an intake air blower 6, an exhaust air blower 7, a heat exchanger 8, a power supply box 12, a guide rail 14, a sensor 71, and a blower control device 23.

[0015] The casing 5 is configured in a hexahedral box shape including a top plate 9, a bottom plate 10, a left side plate 30, a right side plate 40, a front side plate 50, and a rear side plate 60. As shown in Fig. 2, 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.

[0016] An exhaust air inlet 1 and an exhaust air outlet 2 are provided on the left side plate 30. An intake air inlet 3 and an intake air outlet 4 are provided on the right side plate 40.

[0017] An intake airflow flows through the intake air duct 5A. The intake airflow passes from the exhaust air inlet 1 through the heat exchanger 8, and is supplied to the room as intake air through the intake air outlet 4. An exhaust airflow flows through the exhaust air duct 5B. The exhaust airflow passes from the intake air inlet 3 through the heat exchanger 8, and is discharged to the outside as exhaust air through the exhaust air outlet 2. Furthermore, the intake air duct 5A and the exhaust air duct 5B are configured independently of each other so that the intake air and the exhaust air are not mixed within the heat exchanger type ventilator 100.

[0018] 2, the rear plate 60, which is the plate opposite the front plate 50, has a guide rail fixing portion 61. The guide rail fixing portion 61 is a screw hole and a screw provided in the rear plate. That is, in the first embodiment, the means for fixing the guide rail 14 inside the casing 5 is the screw.

[0019] 3, the inspection opening 13 is provided in the front plate 50 of the casing 5 and communicates with the inside of the casing 5. Through the inspection opening 13, the guide rails 14 and the heat exchanger 8 are inserted and removed.

[0020] The maintenance cover 11 is provided on the front plate 50 of the casing 5 so as to cover the inspection opening portion 13. In the heat exchanger type ventilator 100, the inspection opening portion 13 is exposed by opening the maintenance cover 11.

[0021] The intake air blower 6 includes an electric motor and a blade member that rotates when driven by the electric motor. The intake air blower 6 supplies outdoor air into the room to generate an intake airflow in the intake airflow duct 5A. When the blowing rate of the intake air blower 6 increases, the air volume of the intake airflow increases.

[0022] The exhaust fan 7 includes an electric motor and a blade member that rotates when driven by the electric motor. The exhaust fan 7 exhausts indoor air to the outside of the room and generates an exhaust flow in the exhaust airflow duct 5B. When the airflow rate of the exhaust fan 7 increases, the airflow rate of the exhaust flow increases.

[0023] Heat exchanger 8 exchanges heat between the supply airflow flowing in supply air passage 5A and the exhaust airflow flowing in exhaust air passage 5B. A detailed configuration of heat exchanger 8 will be described later.

[0024] The power supply box 12 is provided near the intake air blower 6 on the front side panel 50. The power supply box 12 is connected to the intake air blower 6 and the exhaust air blower 7 by wires, for example, via lead wires.

[0025] The guide rail 14 is detachably fixed to the inner surface of the casing 5 by a guide rail fixing portion 61. The guide rail also movably supports the heat exchanger 8. The detailed configuration of the guide rail will be described later.

[0026] The sensor 71 detects the state of the air in the room in which the heat exchange type ventilation device is installed. In the first embodiment, the sensor 71 detects the state of the air, more specifically, the pollution of the air, by measuring the concentration of carbon dioxide. The configuration of the sensor 71 will be described later.

[0027] The blower control device 23 controls the supply air blower 6 and the exhaust air blower 7. More specifically, the blower control device 23 starts and stops the operation of the supply air blower 6 and the exhaust air blower 7, and controls the airflow rate. The blower control device 23 is connected to the supply air blower 6 and the exhaust air blower 7 by wires, for example, by lead wires. In the first embodiment, when the carbon dioxide concentration detected by the sensor 71 is equal to or higher than a predetermined threshold, the blower control device 23 increases the airflow rate of the supply air blower 6 and the exhaust air blower 7 compared to when the carbon dioxide concentration detected by the sensor 71 is less than the threshold. By performing such control, the heat exchange type ventilation device 100 can increase the ventilation rate when the room in which the heat exchange type ventilation device 100 is installed is dirty, compared to when the room is not dirty, and therefore can perform effective ventilation.

[0028] Fig. 4 is a perspective view showing the heat exchanger 8 of the heat-exchange-type ventilator according to Embodiment 1. The configuration of the heat exchanger 8 will be described in detail with reference to Fig. 4.

[0029] Heat exchanger 8 is disposed midway through intake air duct 5A and exhaust air duct 5B, and is installed and housed in the center of casing 5. Heat exchanger 8 includes a heat exchange element 80 and a heat exchanger frame 81.

[0030] The heat exchange element 80 has a rectangular prism shape as shown in Fig. 4. The heat exchange element 80 is made of specially treated paper that exchanges temperature and humidity between air passing through one side and air passing through the other side. More specifically, the heat exchange element 80 is made by stacking a large number of specially treated papers so that the direction of the intake air duct 5A and the direction of the exhaust air duct 5B are perpendicular to each other.

[0031] The heat exchanger frame 81 is provided at each of the four corners of the heat exchange element 80. The heat exchanger frame 81 has an upper frame 810, a lower frame 811, a right frame 812, and a left frame 813. The heat exchanger 8 is supported by the heat exchanger frame 81 so as to be freely movable along the guide rails 14.

[0032] Fig. 5 is a front view showing the heat exchanger ventilation device 100 according to embodiment 1 with the maintenance cover 11 removed. Fig. 6 is a partial enlarged view of the right guide rail 17 and its vicinity in the front view of the heat exchanger ventilation device 100 according to embodiment 1. The configuration of the guide rail 14 will be described in detail with reference to Figs. 5 and 6.

[0033] The guide rails 14 are detachably fixed to the inner surface of the casing 5. The guide rails 14 movably support the heat exchanger 8 in the casing 5. As shown in FIG 5, the guide rails 14 include an upper guide rail 15, a lower guide rail 16, a right guide rail 17, and a left guide rail 18.

[0034] The upper guide rail 15 fixes the upper part of the heat exchanger 8 by engaging with the upper frame 810 of the heat exchanger 8. The upper guide rail 15 is fixed to the top plate 9 by screwing. The lower guide rail 16 fixes the lower part of the heat exchanger 8 by engaging with the lower frame 811 of the heat exchanger 8. The lower guide rail 16 is fixed to the bottom plate 10 by screwing. The right guide rail 17 is provided on the right side of the right side plate 40 side of the center of the heat exchanger 8 in the left-right direction, that is, on the right side. The right guide rail 17 fixes the right part of the heat exchanger 8 by engaging with the right frame 812 of the heat exchanger 8. The right guide rail 17 is fixed in the casing 5 by screwing. As shown in FIG. 5, the right guide rail 17 is provided with a guide rail side screw hole 174. The left guide rail 18 is provided closer to the left side plate 30 than the center of the heat exchanger 8 in the left-right direction, that is, on the left side. The left guide rail 18 is fitted with a left frame 813 of the heat exchanger 8 to fix the left side of the heat exchanger 8. The left guide rail 18 is fixed to the inner surface of the casing 5 by screws.

[0035] As shown in FIG. 6, the right guide rail 17 has a contact portion 170 where the heat exchanger 8 and the right guide rail 17 come into contact. In FIG. 6, the contact portion 170 does not come into contact with the heat exchanger 8 due to the description of the drawing, but the contact portion 170 is actually in contact with the heat exchanger 8. More specifically, the contact portion 170 contacts the right frame 812 of the heat exchanger 8 to move the heat exchanger 8. The sensor is provided in a non-contact portion 171 that is not the contact portion 170. In the heat exchange type ventilation device 100 of the first embodiment, a guide rail side screw hole 174 is provided in a lower non-contact portion 173 located below the heat exchanger 8. The guide rail side screw hole 174 is screwed to match the position in the left-right direction with the sensor side screw hole portion 723 of the sensor 71, thereby fixing the sensor 71.

[0036] The heat-exchanger-type ventilation device 100 of the first embodiment has a configuration in which the sensor 71 is fixed to the lower non-contact portion 173, and thus has an advantage in that the movement of the heat exchanger 8 by the contact portion 170 is not hindered.

[0037] Although only the configuration of the right guide rail 17 has been described in FIG. 6, the upper guide rail 15, the lower guide rail 16, and the left guide rail 18 all have contact portions and non-contact portions.

[0038] FIG. 7 is a diagram showing the configuration of the sensor 71 of the heat exchanger ventilation device 100 according to the first embodiment. FIG. 8 is a partially enlarged view showing the vicinity of the sensor 71 in the perspective view of the heat exchanger ventilation device 100 according to the first embodiment. FIG. 9 is a diagram showing a schematic view of the inside of the heat exchanger ventilation device 100 according to the first embodiment. The configuration of the sensor 71 will be described with reference to FIG. 7 to FIG. 9. In FIG. 9, the flow of air in the heat exchanger ventilation device 100 is shown by arrows, as in FIG. 2.

[0039] As shown in FIG. 7, the sensor 71 includes a sensor portion 711, a metal plate 712, and a sensor cover 713.

[0040] Specifically, the sensor unit 711 is a carbon dioxide sensor that measures the concentration of carbon dioxide in the air. The sensor unit 711 is also connected to the blower control device 23 by wire and transmits the detection result to the blower control device 23.

[0041] The metal plate 712 has a sensor-side screw hole 723. As shown in Fig. 8 and Fig. 9, the sensor 71 is fixed by screwing the sensor-side screw hole 723 into the lower non-contact portion 173 of the right guide rail 17. The sensor cover 713 is a cover that covers the sensor portion 711. Also, as shown in Fig. 9, in the first embodiment, the sensor 71 is screwed into the exhaust air duct 5B.

[0042] By configuring the sensor side screw hole portion 723 of the metal plate 712 to be screwed into the right guide rail 17, the heat exchanger type ventilation device 100 of embodiment 1 can stably screw the sensor 71 to the guide rail 14.

[0043] The right guide rail 17 on which the sensor 71 is provided can be easily removed from the heat exchange type ventilation device 100 by removing the screw screwed into the guide rail side screw hole 174. In the case of a conventional configuration in which a sensor is provided directly on the inner surface of the casing 5 in the intake air duct 5A or the exhaust air duct 5B, the inspection opening 13 is small, which is a problem in that the workability is poor. In the heat exchange type ventilation device 100, the sensor 71 can be attached to the right guide rail 17 after the right guide rail 17 is removed from the heat exchange type ventilation device 100, and the right guide rail 17 can be fixed inside the heat exchange type ventilation device 100. As described above, the heat exchange type ventilation device 100 has a configuration in which the sensor 71 is attached to the right guide rail 17, which improves the workability when attaching the sensor 71 that detects the air condition, compared to the configuration disclosed in Patent Document 1.

[0044] In addition, by providing the sensor 71 in the exhaust air duct 5B of the right guide rail 17, the sensor 71 can be provided upstream of the heat exchanger 8 in the exhaust air duct, so that the sensor 71 can be provided in a location close to the intake air inlet 3. In the case of a configuration in which the sensor 71 is provided directly on the inner surface of the casing 5 in the intake air duct 5A or the exhaust air duct 5B as in the past, the sensor 71 cannot be provided at a position distant from the inspection opening 13 because the inspection opening 13 is small. Therefore, the accuracy of the detection result detected by the sensor 71 is low because the distance between the inspection opening 13 and the intake air suction opening 3 is large. As described above, by providing the sensor 71 in the exhaust air duct 5B of the right guide rail 17, the heat exchanger type ventilation device 100 can detect the air in the room in which the heat exchanger type ventilation device 100 is installed with high accuracy, compared to a configuration in which the sensor 71 is provided directly on the inner surface of the casing 5 in the intake air duct 5A or the exhaust air duct 5B as disclosed in Patent Document 1.

[0045] Fig. 10 is a flowchart showing the procedure for replacing the sensor 71 of the heat exchanger type ventilation device 100 according to the first embodiment. The procedure for replacing the sensor 71 of the heat exchanger type ventilation device 100 will be described with reference to Fig. 10. The flowchart in Fig. 10 is started when replacing the sensor 71, for example, when the sensor unit 711 breaks down. Steps S101 to S107 in Fig. 10 are performed by an operator or a machine.

[0046] In step S101, the maintenance cover 11 is removed from the heat exchanger-type ventilation device 100. In step S101, the inspection hatch portion 13 of the heat exchanger-type ventilation device 100 is exposed.

[0047] Step S102 is a procedure that is performed after step S101. In step S102, the heat exchanger 8 is removed from the inspection opening 13 along the guide rails 14.

[0048] Step S103 is a procedure performed after step S102. In step S103, the right guide rail 17 is removed from the inspection hatch 13 to the outside of the casing 5. In step S103, the right guide rail 17 is removed from the heat exchanger-type ventilation device 100 by removing the screw screwed into the guide rail side screw hole 174 of the right guide rail 17.

[0049] Step S104 is a procedure performed after step S103. In step S104, the sensor 71 is replaced outside the casing 5. More specifically, after the sensor 71 is removed from the right guide rail 17, a new sensor 71 is screwed to the right guide rail 17.

[0050] Step S105 is a procedure performed after step S104. In step S105, the right guide rail 17 in which the sensor 71 has been replaced in step S104 is inserted into the inside of the casing 5 from the inspection hatch 13, and is attached to the inside of the casing 5 by being screwed to the inner surface of the heat exchanger type ventilator 100.

[0051] Step S106 is a procedure that is performed after step S 105. In step S106, heat exchanger 8 is attached along guide rail 14 from inspection opening portion 13.

[0052] Step S107 is a procedure that is performed after step S106. In step S107, the maintenance cover 11 is attached to the heat exchanger-type ventilator 100. When the procedure of step S107 is completed, the flow chart ends.

[0053] In addition, in Figure 10, the procedure for replacing the sensor 71 is explained, but when a new sensor 71 is to be attached to the heat exchanger type ventilation device 100, the procedure for attaching the sensor 71 to the right guide rail 17 should be performed instead of step S104.

[0054] Furthermore, when assembling the heat exchanger type ventilator 100, steps S104 to S107 may be carried out after the casing 5 is attached.

[0055] As described above, the heat exchange type ventilation device 100 according to the first embodiment includes the intake air blower 6 that supplies outdoor air to the room and generates an intake airflow in the intake air duct 5A, the exhaust air blower 7 that 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 guide rail 14 that is detachably fixed to the inner surface of the casing 5, the heat exchanger 8 that exchanges heat between the intake airflow and the exhaust airflow and is supported in the casing 5 movably along the guide rail 14, the sensor 71 that is attached to the guide rail 14 and detects the air condition of the intake airflow or the exhaust airflow, and the inspection opening part 13 that communicates with the inside of the casing 5. With this configuration, the heat exchange type ventilation device 100 according to the first embodiment has the effect of improving the workability when attaching the sensor 71 that detects the air condition, compared to the configuration disclosed in Patent Document 1.

[0056] The method of mounting the sensor in the heat exchanger type ventilation device 100 according to the first embodiment includes a casing 5 having an intake air duct 5A through which an intake air current flows and an exhaust air duct 5B through which an exhaust air current flows, a guide rail 14 removably fixed to the inner surface of the casing 5, a heat exchanger 8 that exchanges heat between the intake air current and the exhaust air current and is supported in the casing 5 so as to be freely movable along the guide rail 14, a sensor 71 that is attached to the guide rail 14 and detects the state of the intake air current or the exhaust air current, and an inspection hatch portion 13 that communicates with the inside of the casing 5. The method of mounting the sensor 71 in the heat exchanger type ventilation device 100 includes a first step of mounting the sensor 71 to the guide rail 14, a second step of inserting the guide rail 14 into the inside of the casing 5 from the inspection hatch portion 13, a third step of removably fixing the guide rail 14 to the inner surface of the casing 5, and a fourth step of supporting the heat exchanger 8 so as to be freely movable along the guide rail 14. This has the effect of improving the workability when attaching the sensor 71 that detects the air condition, as compared with the configuration disclosed in Patent Document 1.

[0057] Furthermore, in the heat exchanger-type ventilation device 100 according to the first embodiment, as an additional configuration, the sensor 71 is provided in a portion (corresponding to the non-contact portion 171) other than the contact portion 170 where the heat exchanger 8 and the guide rail 14 come into contact. With this additional configuration, the heat exchanger-type ventilation device 100 according to the first embodiment has the effect of not impeding the movement of the heat exchanger 8 by the contact portion 170.

[0058] Furthermore, in the method of mounting the sensor 71 in the heat exchanger-type ventilation device 100 according to the first embodiment, as an additional configuration, the guide rail 14 has a contact portion 170 where the heat exchanger 8 and the guide rail 14 come into contact, and in the first step, the sensor 71 is mounted in a portion other than the contact portion 170 (corresponding to the non-contact portion 171). With this additional configuration, the method of mounting the sensor 71 in the heat exchanger-type ventilation device 100 according to the first embodiment has the effect of not impeding the movement of the heat exchanger 8 by the contact portion 170.

[0059] Furthermore, in the heat exchanger-type ventilator 100 according to the first embodiment, as an additional configuration, the sensor 71 is provided upstream of the heat exchanger 8 in the exhaust air duct 5B to detect the state of the air in the exhaust flow. With this additional configuration, the heat exchanger-type ventilator 100 according to the first embodiment has the effect of being able to easily attach the sensor 71 and to improve the accuracy of detecting the state of the air.

[0060] In addition, the method of mounting the sensor 71 of the heat exchanger type ventilation device 100 according to the first embodiment has, as an additional configuration, a left side plate 30 on which the exhaust side inlet 1 for drawing in indoor air is provided, and a right side plate 40 on which the supply side inlet 3 for drawing in outdoor air is provided, and if the direction perpendicular to the left side plate 30 and the right side plate 40 is the left-right direction, in the first step, the sensor 71 is mounted on the right guide rail 17 provided on the right side plate 40 side of the center of the heat exchanger 8, or on the left guide rail 18 provided on the left side plate 30 side of the center of the heat exchanger 8, in the left-right direction. With this additional configuration, the method of mounting the sensor 71 of the heat exchanger type ventilation device 100 according to the first embodiment has the effect of easily mounting the sensor 71.

[0061] Furthermore, in the heat exchanger-type ventilation device 100 according to the first embodiment, as an additional configuration, the sensor 71 is provided in the exhaust air duct 5B of the right guide rail 17. With this additional configuration, the heat exchanger-type ventilation device 100 according to the first embodiment exhibits the effect of being able to accurately detect the air in the room in which the heat exchanger-type ventilation device 100 is installed, compared to the configuration in which the sensor 71 is provided directly on the inner surface of the casing 5 in the supply air duct 5A or the exhaust air duct 5B as disclosed in Patent Document 1.

[0062] Furthermore, in the heat exchanger ventilator 100 according to the first embodiment, the sensor 71 detects the concentration of carbon dioxide as an additional configuration. With this additional configuration, the heat exchanger ventilator 100 according to the first embodiment has the effect of being able to perform effective ventilation based on the concentration of carbon dioxide.

[0063] Furthermore, in the heat exchanger ventilator 100 according to the first embodiment, as an additional configuration, the guide rail 14 is detachably fixed to the inner surface of the casing 5 by a screw. With this additional configuration, the heat exchanger ventilator 100 according to the first embodiment has the advantage that the guide rail 14 can be easily removed from the casing 5 or attached to the casing 5.

[0064] Furthermore, in the method for mounting the sensor of the heat exchanger type ventilation device 100 according to the first embodiment, as an additional configuration, the means for detachably fixing the guide rail 14 to the inner surface of the casing 5 in the third step is a screw. With this additional configuration, the method for mounting the sensor of the heat exchanger type ventilation device 100 according to the first embodiment has the advantage that the guide rail 14 can be easily removed from the casing 5 or attached to the casing 5.

[0065] In the heat exchange type ventilation device of the first embodiment, the guide rails include an upper guide rail, a right guide rail, a lower guide rail, and a left guide rail, but are not limited to this. For example, the configuration may include only an upper guide rail and a lower guide rail, or may include only a right guide rail and a left guide rail.

[0066] In the heat exchange type ventilation device of the first embodiment, the upper guide rail, the right guide rail, the lower guide rail, and the left guide rail are fixed to the inside of the casing by screwing, but this is not limited thereto. For example, they may be fixed to the inside of the casing by fitting them into the inside of the casing. Also, they may be configured to change the fixing means depending on the position of the guide rail. For example, the guide rail on which the sensor is mounted is fixed to the inside of the casing by screwing, and the other guide rails are fixed to the inside of the casing by fitting them into the casing. This configuration has the effect of making it easy to attach and detach the guide rails.

[0067] In the heat exchange type ventilation device of the first embodiment, the sensor is configured to detect the carbon dioxide concentration, but is not limited to this. The sensor may be configured to detect the state of the air. For example, the sensor may be configured to detect dust, gas concentration, humidity, temperature, or odor concentration.

[0068] In the heat exchange type ventilation device of the first embodiment, the sensor is fixed to the guide rail by one screw hole, but the present invention is not limited to this. The sensor may be fixed by two or more screw holes.

[0069] In the heat exchange type ventilation device of the first embodiment, the sensor has a metal plate and a sensor cover, but this is not limited to the above. If the sensor does not have a sensor cover and a metal plate, the sensor is fixed to the guide rail, for example, by fitting the sensor into a hole provided in the guide rail.

[0070] In the heat exchange type ventilation device of the first embodiment, the sensor is provided on the right guide rail, but the present invention is not limited to this. The sensor may be provided on the guide rail that is detachably fixed to the inner surface of the casing by the guide rail fixing part.

[0071] In the heat exchange type ventilation device of the first embodiment, one sensor is provided on the right guide rail, but the present invention is not limited to this. A plurality of sensors may be provided on the guide rail.

[0072] In the heat exchange type ventilation device of the first embodiment, the fan control device is provided near the power supply box on the front side plate, but is not limited to this. The fan control device may be provided on a side surface of the casing other than the front side plate, or may be configured as a separate device separate from the heat exchange type ventilation device. The fan control device and the power supply box may be configured as a single device.

[0073] In the heat exchange type ventilation device of the first embodiment, the exhaust side intake port is provided on the left side plate, and the supply side intake port is provided on the right side plate, but this is not limited to this. The exhaust side intake port may be provided at any position as long as it can suck in indoor air. The supply side intake port may be provided at any position as long as it can suck in outdoor air. In the heat exchange type ventilation device of the first embodiment, the exhaust air outlet is provided on the left side plate, and the supply air outlet is provided on the right side plate, but this is not limited to this. The exhaust air outlet may be provided at any position as long as it can blow out exhaust air. The supply air outlet may be provided at any position as long as it can blow out supply air.

[0074] In the heat exchange type ventilation device of the first embodiment, the sensor is connected to the fan control device by wire, but the present invention is not limited to this. The sensor may be connected to the fan control device wirelessly.

[0075] In addition, in the heat exchange type ventilator of the first embodiment, the air volume is changed according to the concentration of carbon dioxide detected by the sensor, but the present invention is not limited to this. For example, the ventilation mode of the heat exchange type ventilator may be changed according to the detection result of the sensor.

[0076] In addition, in the procedure for replacing the sensor of the heat exchange type ventilation device of the first embodiment, the sensor unit, the metal plate, and the sensor cover are all replaced, but this is not limited thereto. It is also possible to replace only the sensor unit without replacing the metal plate and the sensor cover.

[0077] Embodiment 2 A heat exchanger type ventilation device 200 according to the second embodiment will be described. The heat exchanger type ventilation device 200 according to the second embodiment is different from the first embodiment in the position where the sensor 91 is provided and the control contents performed by the blower control device 33. The configuration of the heat exchanger type ventilation device 200 except for the position where the sensor 91 is provided and the control contents performed by the blower control device 33 is the same as that of the first embodiment, so the description will be omitted.

[0078] Fig. 11 is a diagram showing a schematic view of the inside of the heat exchanger type ventilation device 200 according to the second embodiment. The position where the sensor 91 is provided will be described with reference to Fig. 11. Also, Fig. 11 shows the air flow inside the heat exchanger type ventilation device 200 with arrows. The sensor 91 is a carbon dioxide sensor that detects the carbon dioxide concentration in the air, similar to the first embodiment.

[0079] 11, sensor 91 is provided on left guide rail 26. More specifically, sensor 91 is fixed by being screwed into guide rail side screw hole 184 provided in lower non-contact portion 183 of left guide rail 26. In addition, in the second embodiment, sensor 91 is provided in supply air duct 5A. That is, sensor 91 is provided upstream of heat exchanger 8 in supply air duct 5A. Sensor 91 detects the concentration of carbon dioxide in the outside air taken in by heat exchanger-type ventilator 200.

[0080] By providing the sensor 91 in the intake air duct 5A of the left guide rail 26, the sensor 91 can be installed in a location close to the exhaust air inlet 1. In the case of a conventional configuration in which a sensor is provided directly on the inner surface of the casing in the exhaust air duct or the intake air duct, the accuracy of the detection result detected by the sensor 91 is low because the distance between the maintenance cover 11 and the exhaust air inlet 1 is large. As described above, by providing the sensor 91 in the intake air duct 5A of the left guide rail 26, the heat exchanger type ventilation device 200 can accurately detect the contamination of the outside air taken in by the heat exchanger type ventilation device 200, compared to a configuration in which a sensor is provided directly on the inner surface of the casing in the intake air duct 5A or the exhaust air duct 5B as disclosed in Patent Document 1.

[0081] The blower control device 33 has a different method of controlling the airflow rate compared to the blower control device 23 of the first embodiment. In the second embodiment, when the carbon dioxide concentration detected by the sensor 91 is equal to or higher than a predetermined threshold value, the blower control device 33 reduces the airflow rates of the supply air blower 6 and the exhaust air blower 7 compared to when the carbon dioxide concentration detected by the sensor 91 is less than the threshold value. By performing such control, the heat exchanger type ventilation device 200 can reduce the ventilation rate when the outside air is highly polluted compared to when the outside air is not highly polluted, thereby achieving effective ventilation.

[0082] As described above, the heat exchange type ventilation device 200 according to the second embodiment has the same configuration as that of the first embodiment, the intake air blower 6 that supplies outdoor air to the room and generates an intake airflow in the intake air duct 5A, the exhaust air blower 7 that 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 guide rail 14 that is detachably fixed to the inner surface of the casing 5, the heat exchanger 8 that exchanges heat between the intake airflow and the exhaust airflow and is supported in the casing 5 movably along the guide rail 14, the sensor 91 that is attached to the guide rail 14 and detects the state of the intake airflow or the exhaust airflow, and the inspection opening 13 that communicates with the inside of the casing 5. With this configuration, the heat exchange type ventilation device 200 according to the second embodiment has the same effects as those described in the first embodiment.

[0083] Similarly to the first embodiment, the method of mounting the sensor 91 of the heat exchanger type ventilation device 200 of the second embodiment is a method of mounting a sensor of a heat exchanger type ventilation device having a casing 5 in which an intake air duct 5A through which an intake air current flows and an exhaust air duct 5B through which an exhaust air current flows are formed, a guide rail 14 removably fixed to the inner surface of the casing 5, a heat exchanger 8 that exchanges heat between the intake air current and the exhaust air current and is supported within the casing 5 so as to be freely movable along the guide rail 14, a sensor 91 that is attached to the guide rail 14 and detects the state of the air in the intake air current or the exhaust air current, and an inspection hatch portion 13 that communicates with the inside of the casing 5, and includes a first step of mounting the sensor 91 to the guide rail 14, a second step of inserting the guide rail 14 into the inside of the casing 5 from the inspection hatch portion 13, a third step of removably fixing the guide rail 14 to the inner surface of the casing 5, and a fourth step of supporting the heat exchanger 8 so as to be freely movable along the guide rail 14. With this configuration, the method of attaching the sensor 91 to the heat exchanger-type ventilation device 200 according to the second embodiment has the same effects as those described in the first embodiment.

[0084] Furthermore, in the heat exchanger-type ventilator 200 according to the second embodiment, as an additional configuration, the sensor 91 is provided upstream of the heat exchanger 8 in the supply air duct 5A to detect the state of the supply air flow. With this additional configuration, the heat exchanger-type ventilator 200 according to the second embodiment has the advantage of being able to accurately detect the contamination of the outside air taken in by the heat exchanger-type ventilator 200, compared to the configuration in which the sensor 91 is provided directly on the inner surface of the casing 5 in the supply air duct 5A or the exhaust air duct 5B as disclosed in Patent Document 1.

[0085] In the first and second embodiments, the sensor is attached either in the supply air duct or in the exhaust air duct, but this is not limiting. A sensor may be provided in both the supply air duct and the exhaust air duct. In this case, the heat exchange type ventilation device may be controlled by comparing the detection result of the sensor provided in the supply air duct with the detection result of the sensor provided in the exhaust air duct.

[0086] Various aspects of the present disclosure are summarized below as appendices.

[0087] (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 guide rail removably fixed to an inner surface of the casing; a heat exchanger that exchanges heat between the intake air flow and the exhaust air flow and is supported within the casing so as to be movable along the guide rail; A sensor attached to the guide rail for detecting a state of air in the intake air flow or the exhaust air flow; An access port communicating with the inside of the casing; A heat exchange type ventilation device having a heat exchange type ventilation device. (Appendix 2) The sensor is provided at a portion other than the contact portion where the heat exchanger and the guide rail are in contact with each other. Attachment 1: A heat exchange type ventilation device. (Appendix 3) The sensor is provided upstream of the exchanger in the supply air duct and detects the state of the air in the supply air flow. 3. A heat exchange type ventilation device as described in appendix 1 or 2. (Appendix 4) The sensor is provided upstream of the heat exchanger in the exhaust air duct and detects the state of the air in the exhaust air flow. 3. A heat exchange type ventilation device according to claim 1 or 2. (Appendix 5) The sensor detects the concentration of carbon dioxide. 6. A heat exchange type ventilation device according to any one of claims 1 to 5. (Appendix 6) The guide rail is removably fixed to the inner surface of the casing by screws. 8. A heat exchange type ventilation device according to any one of claims 1 to 7. (Appendix 7) A method for mounting a sensor in a heat exchange type ventilation device having a casing in which an intake air passage through which an intake air current flows and an exhaust air passage through which an exhaust air current flows are formed, a guide rail detachably fixed to an inner surface of the casing, a heat exchanger which exchanges heat between the intake air current and the exhaust air current and is fixed inside the casing so as to be movable along the guide rail, a sensor which is attached to the guide rail and detects the state of the air in the intake air current or the exhaust air current, and an inspection opening which communicates with the inside of the casing, a first step in which the sensor is attached to the guide rail; a second step of inserting the guide rail into the casing through the access hole; a third step in which the guide rail is removably fixed to an inner surface of the casing; a fourth step of supporting the heat exchanger movably along the guide rail; A method for mounting a sensor in a heat exchange type ventilation device having the above structure. (Appendix 8) In the first step, the sensor is provided at a portion other than a contact portion where the heat exchanger and the guide rail are in contact with each other. A method for installing a sensor in a heat exchange type ventilation device as described in appendix 7. (Appendix 9) The guide rail includes a right guide rail provided on the intake fan side and a left guide rail provided on the exhaust fan side, In the first step, the sensor is provided on the right guide rail or the left guide rail. A method for installing a sensor in a heat exchange type ventilation device described in appendix 7 or 8. (Appendix 10) In the first step, the sensor is provided in the exhaust air passage of the right guide rail. A method for installing a sensor in a heat exchange type ventilation device as described in appendix 9. (Appendix 11) In the first step, the sensor is provided in the air supply passage of the left guide rail. A method for installing a sensor in a heat exchange type ventilation device as described in appendix 9. (Appendix 12) In the third step, the guide rail is removably fixed to the inner surface of the casing by a screw. A method for installing a sensor in a heat exchange type ventilation device described in any one of appendixes 7 to 11. [Explanation of symbols]

[0088] 1 exhaust side intake port, 2 exhaust outlet, 3 intake side intake port, 4 intake outlet, 5 casing, 5A intake air duct, 5B exhaust air duct, 6 intake air blower, 7 exhaust air blower, 8 heat exchanger, 9 top plate, 10 bottom plate, 11 maintenance cover, 12 power supply box, 13 inspection port, 14 guide rail, 15 upper guide rail, 16 lower guide rail, 17 right guide rail, 18 left guide rail, 23 blower control device, 26 left guide rail, 30 left side plate, 33 blower control device, 40 right side plate, 50 front plate, 60 rear plate, 61 guide rail fixing portion, 71 sensor, 80 heat exchange element, 81 heat exchanger frame, 91 sensor, 100 heat exchange type ventilation device, 170 contact portion, 171 Non-contact portion, 173 lower non-contact portion, 174 guide rail side screw hole, 183 lower non-contact portion, 184 guide rail side screw hole, 200 heat exchange type ventilation device, 711 sensor portion, 712 sheet metal, 713 sensor cover, 723 sensor side screw hole, 810 upper frame, 811 lower frame, 812 right frame, 813 left frame.

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 guide rail detachably installed on the inner surface of the casing; a heat exchanger that exchanges heat between the intake air flow and the exhaust air flow and is supported within the casing so as to be movable along the guide rail; a sensor attached to the guide rail for detecting a state of air in the intake air flow or the exhaust air flow; An access port communicating with the inside of the casing; A heat exchange type ventilation device having a heat exchange type ventilation device.

2. The sensor is provided at a portion other than the contact portion where the heat exchanger and the guide rail are in contact with each other. The heat exchange type ventilation system according to claim 1.

3. The sensor is provided upstream of the exchanger in the supply air duct and detects the state of the air in the supply air flow.

3. A heat exchange type ventilation system according to claim 1 or 2.

4. The sensor is provided upstream of the heat exchanger in the exhaust air duct and detects the state of the air in the exhaust air flow.

3. A heat exchange type ventilation system according to claim 1 or 2.

5. The sensor detects the concentration of carbon dioxide. The heat exchange type ventilation system according to claim 1.

6. The guide rail is removably mounted on the inner surface of the casing by means of screws. The heat exchange type ventilation system according to claim 1.

7. A method for mounting a sensor in a heat exchange type ventilation system comprising: a casing in which an intake air passage through which an intake air current flows and an exhaust air passage through which an exhaust air current flows are formed; a guide rail detachably installed on an inner surface of the casing; a heat exchanger which exchanges heat between the intake air current and the exhaust air current and is supported within the casing so as to be movable along the guide rail; a sensor which is attached to the guide rail and detects the state of the air in the intake air current or the exhaust air current; and an inspection opening which communicates with the inside of the casing, a first step in which the sensor is attached to the guide rail; a second step of inserting the guide rail into the casing through the access hole; a third step in which the guide rail is removably fixed to an inner surface of the casing; a fourth step of supporting the heat exchanger movably along the guide rail; A method for mounting a sensor in a heat exchange type ventilation device having the above structure.

Images