JPS6199062A - heat pump equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a heat pump device.

Conventional Structure and Problems Conventionally, there has been a method called a gas injection method as a heat increasing means for a heat pump device. In this method, the gas component of the refrigerant separated in a gas-liquid separator installed at an intermediate pressure between the condenser and evaporator is injected into the compressor cylinder to increase the amount of refrigerant circulation and increase heat. It is something that However, in such a conventional device, the heating effect is only increased by the amount of gas injected, and the amount of gas generated at intermediate pressure is also limited, so the range of capacity adjustment is small.

Purpose of the Invention The purpose of the present invention is to expand the capacity adjustment range of a heat pump device and to ensure the capacity adjustment. This allows the amount of refrigerant circulation to be greatly varied.

Structure of the Invention The heat pump device of the present invention seals a non-azeotropic mixed refrigerant in a refrigerant circuit, and refines a portion of the refrigerant branched into the lower part of the rectifier at intermediate pressure using heating and cooling means. The gas component in the rectifier section (2) is injected into the compressor cylinder.

DESCRIPTION OF EMBODIMENTS An embodiment of the heat pump device of the present invention will be described below with reference to the drawings. In the figure, 1 is a compressor, 2 is a condenser, 3 and 4 are first and second throttle devices, respectively, 6 is an evaporator,
These elements are connected and piped in series. Reference numeral 6 denotes a rectifier, which is constructed so that a portion of the refrigerant is branched into the lower part of the rectifier θ via a pipe 7 at an intermediate pressure between the first and second expansion devices 3.4. The inside of the rectifier 6 is filled with a filler 8, the lower part has a high-temperature pipe 9 leading from the condenser 2 to the first throttle device 3, and the upper part has a low-temperature pipe 9 leading from the second throttle device 4 to the evaporator 6. Pipes 10 are each arranged as a heat exchanger. Furthermore, an injection pipe 12 is connected to the top of the rectifier 6 via a first flow control valve 11 for injecting gas components into the cylinder of the compressor 1, and from the lower part of the bottom reservoir 13 of the rectifier 6. connects the pipe 16 to the evaporator 6 side via the second flow control valve 14.

In such a heat pump device, the effect of capacity adjustment will be explained, particularly when heating is increased. During normal operation, the first and second
When the flow rate control valves 11 and 14 are closed, the rectifier e functions simply as a liquid reservoir, and a fixed amount of the refrigerant flowing through the pipe 7 is stored as a liquid. If heating is required here, by opening the first flow control valve 11, the gas component accumulated at the top of the rectifier 6 is gradually injected into the cylinder of the compressor 1 through the pipe 12. At the same time, refrigerant in a gas-liquid coexistence state is newly branched and introduced through the pipe 7. Since the refrigerant introduced into the rectifier 6 is a non-J1 boiling mixed refrigerant, the gas component containing many low boiling point components is directed upward, and the liquid component containing many high boiling point components is directed to the bottom reservoir 13 at the bottom. However, in the bottom reservoir 13, as it is heated by the high temperature pipe 9, the low boiling point component in the liquid component boils up, and in the upper part, the high boiling point component in the gas component is condensed by the low temperature pipe 10. Drip. That is, in the rectifier 6, the low-boiling components that boil up and the high-boiling components that condense and drip come into countercurrent gas-liquid contact, and the high-boiling components are gradually purified in the bottom reservoir 13 of the rectifier 6. It is stored and stored. Therefore, it passes through the evaporator 6 to the compressor 1.
The refrigerant that circulates to the low-pressure suction side of the
Since the low boiling point component has a small gas specific volume, the amount of refrigerant circulated by the compressor 1 increases, and furthermore, the refrigerant injected through the injection pipe 12 is added, so that the capacity of the condenser 2 is increased more than before. At this time, in this embodiment, the first and second aperture devices 3. ．． Since the piping 7 from the middle of the rectifier 4 to the rectifier 6 is provided at the bottom of the rectifier 6, the so-called concentrating section in the rectifier 6 is long, and low-boiling components can be efficiently concentrated. The refrigerant concentration in the upper part of the rectifier 6 is very efficiently and quickly reduced to low boiling point components, and therefore the heat increasing effect can be achieved in a short time.

Conversely, if heat formation is still required, the rectifier 6 can be closed while the heat pump device is operating by closing the first flow control valve 11 and opening the second flow control valve 14. High temperature piping 9 and low temperature piping t provided inside.

The high boiling point components with high purity stored in the tower bottom reservoir 13 are injected into the evaporator 6 by the total reflux type rectification effect performed in the rectifier 6 by heating and cooling with the evaporator 6. This reduces the amount of circulation and reduces capacity.

Effects of the Invention As explained above, the heat pump device of the present invention is configured such that a non-azeotropic mixed refrigerant is sealed and a part of the refrigerant branched into the rectifier at intermediate pressure is rectified and stored. The structure is such that the intermediate pressure is branched into the lower part of the rectifier, and the range of heat increase/decrease and capacity adjustment is expanded more than ever before, and the rectifying action is performed effectively and quickly, especially when increasing heat.

[Brief explanation of the drawing]

The figure is a configuration diagram of a heat pump device according to an embodiment of the present invention. 1... Compressor, 2... Condenser, 6...
...Evaporator, 6...Rectifier, 9...High temperature piping, 1o...Low temperature piping, 12...
injection piping.

Claims (1)

[Claims] A refrigerant circuit in which a compressor, a condenser, a first and second throttling device, an evaporator, etc. are connected in series and a non-azeotropic mixed refrigerant is sealed, and a rectifier whose lower part is heated and whose upper part is cooled. and a heat source communicating with the middle of the first and second expansion devices of the refrigerant circuit and the lower part of the rectifier, and communicating the top of the rectifier with the inside of the cylinder of the compressor. pump equipment.