JPH031740Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to an air conditioning ventilation fan that performs ventilation through intake and exhaust while exchanging heat between indoor air and outdoor air.

[Conventional technology]

A conventional air conditioning ventilation fan, such as that disclosed in Japanese Utility Model Application Publication No. 54-141165, has two mutually independent ventilation passages in the main body casing 1, as shown in Figure 3. An exhaust flow for exhausting indoor air to outdoor air by an exhaust fan 3 is formed in one passage, and an intake flow for introducing indoor air into the room by an intake fan 2 is formed in the other ventilation passage. Each ventilation passage is composed of a ventilation passage of a built-in heat exchanger 6 in the middle thereof,
This heat exchanger 6 performs sensible heat exchange or total heat exchange between the intake air flow and the exhaust air flow.
The heat exchanger 6 has been detachably attached to the main body casing 1 via a packing 19 due to the necessity of maintenance. The gaskets 19 are for preventing leakage of the intake air flow and the exhaust air flow, and are provided at four locations in the hexahedral-shaped heat exchanger 6 as shown so as to correspond to the ridge corners.

[Problem that the invention attempts to solve]

In the conventional air-conditioning ventilation fan described above, it is difficult to configure the heat exchanger 6 so that the edge part of the installed heat exchanger 6 comes into pressure contact with the gasket 19 on the main body casing 1 side. There were problems in that unless the processing and assembly accuracy of the mounting part of the device was high, the sealing function of the gasket 19 could not be guaranteed, and the intake and exhaust airflows were likely to leak, leading to a decrease in heat exchange function. .

This invention was made in order to solve these problems, and to provide an air conditioning ventilation fan that can prevent leakage of intake and exhaust air flows without using a lot of gaskets, etc., and that makes it easy to maintain the heat exchanger. The purpose is to

[Means for solving problems]

The air conditioning ventilation fan according to this invention has an integral structure in which the heat exchanger and the ventilation passage of the part of the heat exchanger facing the ventilation passage are integrated into the main body casing as a removable heat exchange cassette. An inspection window that can be opened and closed is installed in the section.

[Effect]

In this invention, the heat exchanger and a portion of the ventilation passage facing the heat exchanger are integrally constructed as a heat exchange cassette, and when attached to the main body casing, a complete ventilation passage is constructed. Therefore, it is not only possible to structurally eliminate air leakage at the connecting portion between the heat exchanger's ventilation passage and the ventilation passage that communicates with it, but also to easily perform maintenance of the heat exchanger through the inspection window. I can do it.

[Example of idea]

The air conditioning ventilation fan as an embodiment of the present invention shown in FIGS. 1 and 2 has a hollow hexahedral body casing 1 on one side with an intake fan 2 for sucking in outdoor air and an exhaust fan 3 for discharging indoor air. A heat exchange cassette 4 is installed on the other side of the main casing 1. Intake fan 2
The suction side of the main body casing 1 is connected to the intake connection port provided on one side of the main body casing 1, and the discharge side thereof is connected to the air intake connection port provided on one side of the main body casing 1.
A discharge port 5 is formed in the upper part of the chamber by opening obliquely and laterally. On the other hand, the discharge side of the exhaust fan 3 is connected to an exhaust connection port provided on one side of the main body casing 1 in parallel with the above-mentioned intake connection port, and the suction side thereof is opened into the main body casing 1 as it is. Heat exchange cassette 4
is a box-shaped unit having a hexahedral cross-flow type heat exchanger 6 and a ventilation passage 7 for introducing the intake air flow, which is a secondary fluid, into the heat exchanger 6. It is fitted into the space on the opposite side. At the front of the heat exchange cassette 4, there is a front plate 8 that vertically and obliquely partitions the main body casing 1 in the installed state, and the upper part of this front plate 8 has a discharge port 5 in close contact with the discharge port 5 of the intake fan 2. Inspection window 1 with a joint opening 9 and an opening/closing lid 10 communicating with the
1 are opened horizontally, and the outlet end of a ventilation passage 12 through which the primary fluid of the heat exchanger 6 passes is opened at the lower part. Further, a fitting structure 13 is formed on the left and right edges of the front plate 8 for fitting the front plate 8 into the opposing side walls of the main casing 1. Further, the inlet end of a ventilation passage 12 through which the primary fluid of the heat exchanger 6 passes is opened on the back surface of the heat exchange cassette 4, and the exit end of a ventilation passage 14 through which the secondary fluid of the heat exchanger 6 passes is opened on the lower surface. ing. The bottom rear side of the heat exchange cassette 4 bulges out and comes into contact with a grill 15 attached to the bottom end of the main casing 1, so that the ventilation section 16 of the grill 15 can be divided into two into an intake side and an exhaust side. . The heat exchanger 6 is assembled using a method that prevents air leakage.

Therefore, in the air conditioning ventilation fan of this example, the heat exchange cassette 4 is installed in the main body casing 1, and the joint opening 9 of the front plate 8 is joined to the discharge port 5 of the intake fan 2. A series of ventilation passages 17 through which the intake air flow from the exhaust fan 2 passes and a series of ventilation passages 18 through which the exhaust air flow from the exhaust fan 3 passes are configured to be independent from each other, and heat exchange ventilation can be performed. A ventilation passage 18 for the exhaust air flows from the grill 15 through the ventilation passage 12 of the heat exchanger 6 whose inlet end is open at the back of the heat exchange cassette 4.
The path extends from the lower part of the front plate 8 to the space inside the main body casing 1 connected to the suction side of the exhaust fan 3, and further from the exhaust fan 3 to the exhaust connection port.
The ventilation passage 17 for the intake air flow is connected from the introduction part of the ventilation passage 7 which connects from the intake connection port to the other ventilation passage 14 of the heat exchanger 6 via the discharge port 5 of the intake fan 2 to the ventilation passage of the heat exchanger 6. 14, and further from the outlet end of the lower surface of the heat exchange cassette 4 to the grill 15. These two systems of ventilation passages 17,
18, the only part where there is a possibility of air leakage is the joint between the joint opening 9 of the ventilation passage 7 of the heat exchange cassette 4 and the discharge port 5 of the intake fan 2; away from the ventilation path 14 of 6,
Since strong static pressure is not applied, a structure that only measures adhesion is sufficient to prevent air leakage. Furthermore, all of the entrance and exit ends of the heat exchanger 6 in the heat exchange cassette 4 can be cleaned by opening the inspection window 11, so maintenance is as easy as with a type in which the heat exchanger 6 can be separated. It can be implemented.

It should be noted that the heat exchange cassette 4 may be configured with a ventilation passage for introducing both the intake air flow and the exhaust air flow into the air passage of the heat exchanger 6, or only the ventilation passage for the exhaust air flow may be configured as in the above-described embodiment. It may be configured as follows. Further, the opening/closing lid 10 of the inspection window 11 may be of a hinge type or of a fitting/disconnecting type.

[Effect of idea]

As is clear from the above description of the embodiments, the air conditioning ventilation fan of the present invention has an integral structure in which the heat exchanger and the ventilation passage of the part of the heat exchanger facing the ventilation passage are removably attached to the main body casing. Since the heat exchanger is integrated with a part of the ventilation path that connects the heat exchanger to the ventilation path, it is possible to prevent air leakage with structural stability when installing the heat exchanger. By frequently using gaskets like these, stable airtightness can be maintained without requiring high processing or assembly accuracy, and the heat exchanger cassette does not require inspection of the heat exchanger. Since a window is provided, maintenance of the heat exchanger can be performed through the inspection window, and maintainability is not reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an air conditioning ventilation fan according to an embodiment of the present invention, Fig. 2 is a perspective view showing only its heat exchange cassette, and Fig. 3 is a sectional view showing an air conditioning ventilation fan as a conventional example. . In the figure, 1 is the main body casing, 2 is an intake fan, 3 is an exhaust fan,
4 is a heat exchange cassette, 5 is a discharge port, 6 is a heat exchanger, 7 is a ventilation path, 9 is a joint opening, 10 is an opening/closing lid, 11 is an inspection window, 12 and 14 are ventilation paths, 17,
18 is a ventilation passage. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] An intake fan for sucking in outdoor air and an exhaust fan for discharging indoor air are built into the main body casing, and the discharge side of the intake fan has a ventilation passage partially constituted by one of the ventilation passages of the heat exchanger; The exhaust fan is an air conditioning ventilation fan having a ventilation passage, a part of which is formed by the other ventilation passage of the heat exchanger, on the suction side of the exhaust fan. An air conditioning ventilation fan characterized in that the ventilation passage is integrally constructed as a removable heat exchange cassette with the main body casing, and a part of the outer surface of the heat exchange cassette is provided with an openable and closable inspection window for the heat exchanger.