Heat pump

Abstract

The invention relates to a heat pump (2), which can be changed over between cooling mode and heating mode, having a first heat exchanger (4), a second heat exchanger (6), two compressor stages (8, 10) for compressing a medium and a medium pressure bottle (12), inserted between the compressor stages (6, 8) and the second compressor stage (10) for phase separation of the fluid medium. Downstream of the second compressor stage (8), a changeover valve (16) is arranged, by means of which a flow connection between the second compressor stage (8) and the second heat exchanger (6) can be established in cooling mode, and a flow connection between the second compressor stage (8) and the first heat exchanger (4) can be established in heating mode.

Description

technical field

[0001] The invention relates to a heat pump switchable between cooling operation and heating operation, the heat pump having a first heat exchanger and a second heat exchanger between which energy can be transferred in one or the other direction , and has a compressor unit. Background technique

[0002] Heat pumps of the type mentioned at the outset are known from the prior art. Such a heat pump is used to transfer thermal energy from a first container to a second container while expending work. Heat pumps generally work with a fluid that is evaporated at low pressure with heat input and condensed again with heat output after compression to high pressure. The pressures are chosen such that the temperature of the phase transition has a sufficient difference for the heat transfer relative to the temperature of the heat source or heat sink.

[0003] In its simplest form, a heat pump works with a fluid circuit that has: an evaporator in which the fluid or medi...

Examples

Embodiment Construction

[0032] Figure 1a and 1b Indicates that a heat pump 2 according to the present invention is in heating operation ( Figure 1a ) or in refrigeration work ( Figure 1b ). In the circuit diagrams shown, the different phase states or pressure levels of the medium or refrigerant are represented by different connection types. Basically three different states occur in the heat pump according to the invention: firstly the refrigerant or the medium is delivered partly in liquid state, which is indicated by the solid line. Furthermore, the medium is partly delivered as cold gas, which is indicated by the dotted connection. Furthermore, the medium is also conveyed as hot gas, which is indicated by a dotted connection. The direction of flow is indicated by arrows.

[0033] The heat pump 2 according to the invention has a first heat exchanger 4 which can be formed as a plate heat exchanger. This first heat exchanger 4 is connected to the object to be heated or cooled. A second heat e...

technical field

[0001] The invention relates to a heat pump switchable between cooling operation and heating operation, the heat pump having a first heat exchanger and a second heat exchanger between which energy can be transferred in one or the other direction , and has a compressor unit. Background technique

[0002] Heat pumps of the type mentioned at the outset are known from the prior art. Such a heat pump is used to transfer thermal energy from a first container to a second container while expending work. Heat pumps generally work with a fluid that is evaporated at low pressure with heat input and condensed again with heat output after compression to high pressure. The pressures are chosen such that the temperature of the phase transition has a sufficient difference for the heat transfer relative to the temperature of the heat source or heat sink.

[0003] In its simplest form, a heat pump works with a fluid circuit that has: an evaporator in which the fluid or medi...

Examples

Embodiment Construction

[0032] Figure 1a and 1b Indicates that a heat pump 2 according to the present invention is in heating operation ( Figure 1a ) or in refrigeration work ( Figure 1b ). In the circuit diagrams shown, the different phase states or pressure levels of the medium or refrigerant are represented by different connection types. Basically three different states occur in the heat pump according to the invention: firstly the refrigerant or the medium is delivered partly in liquid state, which is indicated by the solid line. Furthermore, the medium is partly delivered as cold gas, which is indicated by the dotted connection. Furthermore, the medium is also conveyed as hot gas, which is indicated by a dotted connection. The direction of flow is indicated by arrows.

[0033] The heat pump 2 according to the invention has a first heat exchanger 4 which can be formed as a plate heat exchanger. This first heat exchanger 4 is connected to the object to be heated or cooled. A second heat e...

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