JPS5954062U

JPS5954062U - air conditioner

Info

Publication number: JPS5954062U
Application number: JP14922682U
Authority: JP
Inventors: 須摩　誓
Original assignee: 株式会社東芝
Priority date: 1982-10-01
Filing date: 1982-10-01
Publication date: 1984-04-09
Also published as: JPH0245736Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の電動式膨張弁を採用した空気調和装置を
示す構成図、第２図はその暖房運転から除霜運転に切換
わるときの電動式膨張弁の開度状況を示す線図、第３図
はその除霜運転に入る前の室外側熱交換器内における冷
媒の存在状況を示す断面図、第４図はこの考案の一実施
例の空気調和装置を示す構成図、第５図はその電動式膨
張弁の構造を示す断面図、第６図は除霜運転に入る直前
における電動式膨張弁の開度状況を示す線図、第７図は
その除霜運転前の室外側熱交換器内における冷媒の存在
状況を示す断面図、第８図は除霜運転時における室外側
熱交換器の温度上昇推移を従来の温度上昇推移と対比し
で示した線図、第９図はこの考案の他の実施例の電動式
膨張弁を全全閉状態に絞ったときにおける室外側熱交換
器内の冷媒の存在状況を示す断面図、第１０図はこの考
案の他の実施例の空気調和装置を示す構成図である。３・・・室外側熱交換器、４・・・室内側熱交換器、６
・・・電動式膨張弁、８・・・制御部、１０・・・温度
検知器。Fig. 1 is a configuration diagram showing an air conditioner employing a conventional electric expansion valve, and Fig. 2 is a diagram showing the opening degree of the electric expansion valve when switching from heating operation to defrosting operation. Fig. 3 is a sectional view showing the presence of refrigerant in the outdoor heat exchanger before starting the defrosting operation, Fig. 4 is a configuration diagram showing an air conditioner according to an embodiment of this invention, and Fig. 5 Figure 6 is a cross-sectional view showing the structure of the electric expansion valve, Figure 6 is a line diagram showing the opening status of the electric expansion valve just before starting defrosting operation, and Figure 7 is the outdoor heat before defrosting operation. Figure 8 is a cross-sectional view showing the presence of refrigerant in the exchanger. Figure 8 is a diagram showing the temperature rise transition of the outdoor heat exchanger during defrosting operation in comparison with the conventional temperature rise transition. FIG. 10 is a sectional view showing the presence of refrigerant in the outdoor heat exchanger when the electric expansion valve of another embodiment of this invention is fully closed. FIG. 1 is a configuration diagram showing an air conditioner. 3... Outdoor heat exchanger, 4... Indoor heat exchanger, 6
...Electric expansion valve, 8...Control unit, 10...Temperature detector.

Claims

[Scope of utility model registration request]

In an air conditioner in which an electric expansion valve whose throttling operation is controlled by a control unit is disposed between an outdoor heat exchanger and an indoor heat exchanger to configure a refrigeration cycle capable of air-conditioning/heating operation, When the electric expansion valve is switched from heating operation to defrosting operation by the control unit, the aperture opening is set to be smaller than the aperture opening of the heating operation for a fixed period of time immediately before starting the defrosting operation. An air conditioner characterized by being controlled.