JPS621592Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner such as a ventilation device, an air conditioning device, a dehumidifying device, etc., and particularly relates to an air conditioner equipped with a rotary heat exchanger.

Conventionally, as shown in FIG. 1, a rotary heat exchanger 2' is disposed in a box body 1' across both passages, a partition wall 3' separates both passages, and a partition wall separates an indoor side and an outdoor side. There is a structure in which the gap between the center seal member 5' and the center seal member 4' is sealed by an elastic center seal material 5', an outer circumferential seal 6', and a circumferential seal 7', but in this structure, as shown in FIG. If the outside air 8' is extremely low temperature (for example -30°C) compared to the indoor air 9', the circumferential sealing material 7' will separate the outside air 8' and the indoor air 9' when the rotary heat exchanger is stopped.
Because of this, frost 12' is generated on the indoor surface of the circumferential sealing material. Also, during operation, the supply air 10' is close to the indoor air 9', and the exhaust air 11' is the outside air 8'.
, frost 12' is generated on the indoor surface of the circumferential sealing material 7' in the same way as when the vehicle is stopped. If frost grows on the circumferential sealing material 7', the sliding surface of the circumferential seal will come into contact with more pressure than necessary, which has the drawback of increasing the load on the drive motor 13'.

The present invention focuses on the above drawbacks and aims to provide a rotary heat exchanger that eliminates the above drawbacks and maintains the conventional sealing performance.

The present invention will be explained in detail below with reference to the embodiments shown in FIGS. 3 and 4. FIG. 3 is a longitudinal cross-sectional view showing an embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along the line AA in FIG. In FIGS. 3 and 4, straddling both passages partitioned by the partition wall 3 in the box 1,
Similar to the conventional example, a rotary heat exchanger 2 is arranged, and the gaps between the rotary heat exchanger 2, the partition wall 3, and the partition wall 4 separating the indoor side and the outdoor side are filled with a center seal material 5 and an outer peripheral seal 6. (not shown), and is sealed with a circumferential sealing material 7 to constitute an air conditioner having a rotary heat exchanger. An anti-frost heater 14 is provided near the center seal material 5 and the entire circumference of the circumferential seal material 7 at a location on the outdoor side where the rotary heat exchanger rotates from the exhaust side to the air supply side. The rotary heat exchanger 2 is supported by bearings 15 and rotated by a drive motor 13. Now, in FIGS. 3 and 4, when the outside air 8 is extremely low temperature compared to the indoor air 9, when the anti-frost heater 14 is energized, the air temperature near the sealing member on the outside air side increases, and during stoppage and operation. In both cases, frost does not form on the sealing member unlike the conventional example described above. Therefore, unlike the conventional example, there is no increase in the load on the drive motor due to frost formation, and the sealing performance is maintained. Since the frost prevention method of the present invention only increases the air temperature near the frost seal member, the frost prevention heater 14 is It requires only a small capacity and is extremely economical.

Furthermore, as is clear from the description of the embodiments above, the present invention is effective not only in the above structure. For example, if the structure of the center seal and outer seal is the same as that of the embodiment shown in FIG. Even if the sealing method is different, such as when the partition walls 4 are placed before and after the rotary heat exchanger 2 and a circumferential seal is applied to each partition wall,
It goes without saying that the same effects as in the above-mentioned embodiments can be obtained by providing the anti-frost heater 14 near the sealing member where frost forms.

Although the anti-frost heater 14 may be energized manually during the winter, it is economically preferable to energize it automatically by combining the outdoor temperature detection means with the heater.

According to the above invention, since the arc-shaped heater is provided near the circumferential seal, the heater can also heat the circumferential seal and the outdoor air near the seal. Therefore, conventionally, especially when the outside temperature is low,
As the circumferential seal is cooled by the outside air, warm air comes into contact with the cooled circumferential seal on the indoor side of the circumferential seal, and this occurs particularly on the indoor side of the circumferential seal where there is little air circulation. Dew condensation or frost growth from dew can be prevented. Therefore, it is possible to prevent the heat exchanger from becoming soggy due to dew, corrosion of surrounding members, failure of surrounding electrical equipment, or overloading of the heat exchanger due to frost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional example, Fig. 2 is a longitudinal cross-sectional view of the conventional example, Fig. 3 is a longitudinal cross-sectional view of an embodiment of the present invention, and Fig. 4 is a cross-sectional view taken along line A-A in Fig. 3. It is. still,
The same numerals in the figures indicate the same members, and conventional ones are indicated by ''. Further, arrows indicate the direction of ventilation and the direction of rotation. 2... Rotary heat exchanger, 4... Partition wall, 7... Circumferential sealing material, 14... Anti-frost heater.

Claims (1)

[Claims for Utility Model Registration] A rotary heat exchanger is provided, and a circumferential seal is provided on the outdoor side of the rotary heat exchanger, the tip of which abuts against the outer periphery of the heat exchanger to separate the indoor and outdoor areas. An air conditioner equipped with a rotary heat exchanger, characterized in that an arc-shaped heater is provided near the circumferential seal.