Heat pump

Abstract

The invention provides a heat pump comprising an inlet (1), a volute (2) and an outlet (3) which are successively communicated, wherein an impeller is installed in the volute (2). The heat pump also comprises heating equipment (5). The heating equipment (5) comprises a tubular heating body (51), a heat insulation protecting jacket (52) and a conductive terminal (53), wherein the heat insulation protecting jacket (52) surrounds the periphery of the tubular heating body (51), and the conductive terminal (53) is electrically connected with the tubular heating body (51) and passes through the heat insulation protecting jacket (52) to be connected with an external supply circuit; one end of the heating equipment (5) can be fixedly connected to the inlet (1) or the outlet (3); and the other end is used for connecting an external pipeline. The invention adopts the tubular heating body which is connected with the inlet of the volute and the external water pipe in series, which is convenient to heat flowing water, has large heating area and improves heating efficiency. In addition, the heating body is surrounded by the heat insulation protecting jacket so as to prevent the heat of the electrical heating body from emitting outwards, thus further improving heating efficiency.

Description

technical field [0001] The present invention relates to an electric pump, and more particularly, to a heat pump. Background technique [0002] The heat pump is an electric pump with heating function, which is widely used in dishwashers, washing machines and other fields. [0003] European patent application EP1047334 filed on 30.10.1999 discloses a heat pump. like figure 1 For the schematic diagram of the heat pump, figure 2 is a sectional view of the heat pump scroll portion. like figure 1 and figure 2 As shown, the heat pump includes a casing 19' and a motor (not shown) installed in the casing, an impeller 16' is installed at the inlet 15' of the heat pump, and a volute 23' is fixedly installed to the casing 19' to cover Impeller 16'. A heating device 17' is installed between the impeller 16' and the volute 23', the heating device 17' includes a heating body 18', and the heating body 18' surrounds the impeller 16' in concentric circles, and the wiring of the heati...

AI Technical Summary

Problems solved by technology

[0004] Since the heating body 18' is wound between the impeller 16' and the volute 23', it is necessary to increase the inner cavity of the volute 23' to accommodate the heating body 18' during product design, resulting in an increase in the volume of the volute, Increase in materials

In addition, the volume of the inner cavity of the volute 23' is relatively large and the heating body 18' is only installed on the inner side of the volute 23' (refer to figure 2 ), the heating area is limited, and the volute 23' is easy to dissipate the heat generated by the heating body 18' to the outside of the pump, resulting in low heating efficiency

In addition, the heating body 18' of the heating device 17' is installed in the volute 23', which has a complex structure and brings difficulties to later maintenance and replacement of the heating device 17'

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