JPH0579896B2 - - Google Patents

Description

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

Configuration of Conventional Example and Its Problems Conventionally, there has been a method called a gas injection system as a heat increasing means for a heat pump device. This method increases the amount of refrigerant circulated and increases heat by injecting the gas component of the refrigerant, which is separated in a gas-liquid separator installed at an intermediate pressure between the condenser and evaporator, into the compressor cylinder. It is ivy. 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 circulated in the system 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 a heating and cooling means. The gas component at the top of the rectifier is injected into the compressor cylinder.

DESCRIPTION OF EMBODIMENTS Hereinafter, one embodiment of the heat pump device of the present invention will be described 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, and 5 is an evaporator, and these elements are connected in series with piping. Reference numeral 6 denotes a rectifier, and the first and second throttle devices 3 and 4 are constructed so that a portion of the refrigerant is branched into the lower part of the rectifier 6 through a pipe 7 at an intermediate pressure. The inside of the rectifier 6 is filled with a filler 8, and 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 leading from the second throttle device 4 to the evaporator 5. 10 are each arranged as a heat exchanger. Furthermore, rectifier 6
An injection piping 12 is connected to the top of the column via a first flow control valve 11 for injecting gas components into the cylinder of the compressor 1, and a second flow control valve is connected from the bottom of the bottom reservoir 13 of the rectifier 6. A pipe 15 is connected to the evaporator 5 via a valve 14.

In such a heat pump device, the effect of capacity adjustment will be explained, particularly when heating is increased. During normal operation, if the first and second flow control valves 11 and 14 are closed, the rectifier 6 functions as a mere liquid reservoir.
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, a new refrigerant in a gas-liquid coexistence state is branched into the pipe 7. Since the refrigerant introduced into the rectifier 6 is a non-azeotropic mixed refrigerant, the gas component containing many low boiling point components flows upward, and the liquid component containing many high boiling point components flows into the bottom reservoir 13 at the bottom. It accumulates, but
In the tower bottom reservoir 13, since 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 and dripped by the low-temperature pipe 10. That is, in the rectifier 6, the low boiling point component that boils up and the high boiling point component that condenses and drops come into contact with gas and liquid in a countercurrent manner to the bottom reservoir 1 of the rectifier 6.
3, high boiling point components are gradually rectified and stored. Therefore, the refrigerant that circulates through the evaporator 5 to the low-pressure suction side of the compressor 1 has a large amount of low-boiling point components, and since the low-boiling point components have a small gas specific volume, the amount of refrigerant circulated by the compressor 1 increases. By adding the refrigerant injected through 12, the capacity of the condenser 2 is increased more than before. At this time, in this embodiment, since the piping 7 from between the first and second throttle devices 3 and 4 to the rectifier 6 is provided at the lower part of the rectifier 6, so-called The condensing section is longer, and the concentration of low-boiling components is performed efficiently, and the refrigerant concentration at the top of the rectifier 6 is very efficiently and quickly reduced to low-boiling components.Therefore, the heat-increasing effect can be achieved in a short time. It is.

On the other hand, when heat reduction is required, the first flow control valve 11 is closed and the second flow control valve 14 is opened.
High temperature piping 9 and low temperature piping 1 provided in the rectifier 6
The high boiling point components with high purity stored in the tower bottom reservoir 13 are injected into the evaporator 5 by the total reflux type rectification effect performed in the rectifier 6 by heating and cooling with 0.0. This reduces the amount of circulation and reduces capacity.

Effects of the Invention As explained above, the heat pump device of the present invention has the following features:
A non-azeotropic mixed refrigerant is enclosed, and a part of the refrigerant branched into the rectifier at intermediate pressure is rectified and stored.In particular, the structure is such that the refrigerant is branched into the lower part of the rectifier from the intermediate pressure. The above-mentioned heat increase/decrease and capacity adjustment ranges are expanded, and the rectification action, especially when increasing heat, is effectively and quickly carried out.

[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, 5... Evaporator,
6... Rectifier, 9... High temperature piping, 10... Low temperature piping, 12... Injection piping.

Claims (1)

[Claims] 1 Compressor, condenser, first and second throttling devices,
It has a refrigerant circuit in which an evaporator and the like 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 the first and second apertures of the refrigerant circuit A heat pump device in which an intermediate portion of the device is communicated with a lower portion of the rectifier, and a top portion of the rectifier is communicated with the inside of the cylinder of the compressor.