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EP4506625A1 - Pompe à chaleur - Google Patents

Pompe à chaleur Download PDF

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Publication number
EP4506625A1
EP4506625A1 EP24193111.2A EP24193111A EP4506625A1 EP 4506625 A1 EP4506625 A1 EP 4506625A1 EP 24193111 A EP24193111 A EP 24193111A EP 4506625 A1 EP4506625 A1 EP 4506625A1
Authority
EP
European Patent Office
Prior art keywords
heat
drip tray
pulsating
heat pipe
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP24193111.2A
Other languages
German (de)
English (en)
Inventor
Olaf Ohlhafer
Bastian Vogt
Yannick Fabian FREY
Philipp KOTMAN
Sebastian Martens
Fabian Schmid
Maximilian Elfner
Petra Weinbrecht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4506625A1 publication Critical patent/EP4506625A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/0095—Devices for preventing damage by freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/08—Arrangements for drainage, venting or aerating
    • F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/088—Draining arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/136—Defrosting or de-icing; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/16—Arrangements for water drainage 
    • F24H9/17—Means for retaining water leaked from heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps

Definitions

  • Heat pumps are known from the state of the art. They can be part of a building heating system and/or a building cooling system. Alternatively, they can be part of a refrigerator or freezer. During operation, heat pumps can absorb a heat flow at a low temperature level, for example from ambient air, and release it at a high temperature level, for example to a consumer, using electrical compressor power. In an air-water heat pump, humidity (water vapor) contained in the ambient air can condense on an evaporator surface of the heat pump to form condensate, and possibly even freeze to form condensate ice.
  • the condensate and condensate ice drip and fall into a drip tray assigned to the heat pump evaporator, where they are caught and collected and drained via an outlet on the drip tray from the drip tray and/or from the heat pump housing and/or into a drain line or drain pit.
  • the condensate in the drip tray can freeze to form condensate ice. Freezing of the condensate in the drip tray should be avoided in order to ensure that the condensate is drained away. Heating the drip tray to liquefy the condensate ice and/or to keep the condensate liquid using an electric heating element has a low energy efficiency.
  • the invention relates to a heat pump, in particular an air-water heat pump, with a drip tray for collecting, collecting and/or Draining condensate.
  • the drip tray can be assigned to an evaporator of the heat pump.
  • the heat pump comprises at least one pulsating heat pipe for heating the drip tray, wherein the at least one pulsating heat pipe connects the drip tray to at least one heat source - in particular in a heat-conducting and/or heat-transferring manner.
  • the invention allows ice to be liquefied in the drip tray and/or condensate to be kept liquid in the drip tray. This ensures that condensate is safely drained out of the heat pump housing.
  • condensate can be evaporated in the drip tray.
  • the heat pump comprises a refrigerant circuit through which a refrigerant flows in a circuit.
  • the heat pump comprises in particular the components through which the refrigerant flows: evaporator, compressor, condenser and expansion device (for example an expansion valve) as well as pipe elements for connecting the aforementioned components to the refrigerant circuit.
  • the heat pump can further comprise in particular the following components: an intermediate heat exchanger, control electronics, power electronics, an inverter, a pipe element of a connection device for connecting the heat pump to an external consumer, for example a heating circuit and/or cooling circuit.
  • the drip tray has in particular a base, an outlet opening in the base for draining the condensate from the drip tray and at least one side wall and forms a container that is open upwards in the direction of gravity and in which the drops of condensate falling from the heat pump evaporator are collected.
  • the fact that the drip tray is assigned to the evaporator of the heat pump can be understood here in particular to mean that the drip tray is positioned in the ready-to-use position of the heat pump, in particular directly, in the direction of gravity below the evaporator.
  • a maximum width and a maximum length of the drip tray, in particular a surface of the base takes up at least one projection surface of the evaporator in the direction of gravity.
  • a pulsating heat pipe is to be understood here in particular as a device for heat transfer and/or heat transport.
  • the mechanism of heat transfer or heat transport is based in particular on convection internal to the pulsating heat pipe.
  • the pulsating heat pipe is also called an oscillating heat pipe.
  • the pulsating heat pipe is integrated into the heat pump with the aim of conducting heat from a heat source to the drip tray.
  • the pulsating heat pipe is connected to both the heat source and the drip tray in a heat-transfer manner.
  • the pulsating heat pipe comprises at least one tubular microchannel, the diameter of which is advantageously in the range of approximately 0.5 millimeters to 2 millimeters.
  • a channel structure comprising the microchannel is in particular ring-shaped and closed in itself.
  • the microchannel is, in particular partially, filled with a working fluid, in particular a coolant.
  • a working fluid in particular a coolant.
  • the fact that the microchannel is partially filled with a working fluid is to be understood here as meaning that - if the working fluid at least partially has a liquid phase - this liquid phase only fills the microchannel in sections. Other sections of the microchannel can be filled with a gaseous phase of the working fluid.
  • the microchannel runs both along the heat source and along the drip tray and is connected to both the heat source and the drip tray in a heat-conducting and/or heat-transferring manner. When heat from the heat source is introduced into the working fluid, the working fluid evaporates locally and pressure gradients arise that transport the working fluid through the microchannel.
  • the vapor bubbles migrate from the point of heat introduction through the microchannel to the drip tray and condense there. The heat is thereby released to the drip tray. Overall, the heat absorbed at the heat source is distributed to the drip tray, with only a small temperature difference occurring between the evaporator section and the condenser section of the pulsating heat pipe.
  • the heat source is advantageously a heat source internal to the heat pump or a waste heat source and in particular comprises at least one component of the heat pump.
  • the heat transfer with the pulsating heat pipe is based on the evaporating working fluid, which absorbs heat from the heat source on the warm side of the pulsating heat pipe by means of evaporation and creates pressure gradients that drive the working fluid through the narrow microchannel.
  • the working fluid condenses on the drip tray on the cold side of the pulsating heat pipe and thus transfers the heat.
  • the heat transfer with the pulsating heat pipe is not subject to the effect of gravity, so the pulsating heat pipe can be arranged very freely and independently of the direction of gravity in the heat pump. Due to the working fluid, which can be a coolant, the pulsating heat pipe is also not subject to the risk of frost.
  • the pulsating heat pipe cannot therefore be compared to a conventional heat pipe.
  • the working fluid of a conventional heat pipe mostly consists of water.
  • the conventional heat pipe uses gravity and/or capillary forces to distribute the working fluid and transfer heat.
  • the position dependency of the conventional heat pipe must be taken into account.
  • the condensed liquid working fluid flows downwards due to gravity, the evaporated gaseous coolant flows upwards.
  • the heat source must therefore always be arranged below the heat sink.
  • the connection is a heat-conducting and/or heat-transferring connection.
  • the connection can be made in particular due to intimate contact that occurs under pressure or by means of soldering, welding or gluing.
  • a heat-conducting and/or heat-transferring connection can also be created by means of a thermal interface material, for example a thermal paste, a thermal mat or a thermal pad.
  • At least one pulsating heat pipe can be understood to mean exactly one pulsating heat pipe.
  • at least one pulsating heat pipe can also be understood to mean two or more pulsating heat pipes.
  • the two or more pulsating heat pipes can be arranged in parallel with respect to the heat flows conveyed through them, so that each of the two or more pulsating heat pipes connects the drip tray to at least one heat source.
  • the two or more pulsating heat pipes can be arranged in series, so that a first pulsating heat pipe contacts the drip tray in a heat-conducting manner and a second pulsating heat pipe contacts the at least one heat source.
  • the at least one heat source is selected from a group of components of the heat pump, comprising an evaporator, a compressor, a condenser, an intermediate heat exchanger, control electronics, power electronics, an inverter, a pipe element of a refrigerant circuit, in particular of the heat pump, a pipe element of a connection device for connecting the heat pump to an external consumer, for example a heating circuit and/or cooling circuit.
  • a group of components of the heat pump comprising an evaporator, a compressor, a condenser, an intermediate heat exchanger, control electronics, power electronics, an inverter, a pipe element of a refrigerant circuit, in particular of the heat pump, a pipe element of a connection device for connecting the heat pump to an external consumer, for example a heating circuit and/or cooling circuit.
  • At least one heat source can be understood to mean exactly one heat source. Alternatively, at least one heat source can also be understood to mean two or more heat sources.
  • the aforementioned components of the heat pump can give off heat during operation.
  • the waste heat from at least one of the components of the heat pump can advantageously be used as heat to heat the drip tray.
  • the waste heat is generated during operation of the heat pump and remains unused in the current state of the art. By using it and simultaneously saving an additional heat source, the efficiency of the heat pump increases.
  • the heat-emitting component is effectively cooled, which results in another additional benefit for the component.
  • the heat-emitting component is also referred to here as the component to be cooled.
  • a possible piping element of the refrigerant circuit is a section of the refrigerant circuit located downstream of the condenser and upstream of the expansion device.
  • a return connection of a heating circuit or cooling circuit is particularly suitable as a possible piping element of a connection device for connecting the heat pump to an external consumer.
  • the at least one heat source is an electrical heating element.
  • the drip tray can be heated effectively and safely via at least one pulsating heat pipe.
  • An electrical heating element is understood here to mean, in particular, an electrical device for generating a heat flow.
  • the heating element is supplied with electrical energy (electrical current).
  • the electrical energy can be regulated so that the heat flow can also be regulated.
  • the heat flow can be transferred to a pulsating heat pipe, for example.
  • both the electrical heating element and a component of the heat pump to be cooled represent a heat source for at least one pulsating heat pipe. In this way, a higher overall heat output can be introduced into the pulsating heat pipe.
  • the electric heating element is intended as the sole heat source of the pulsating heat pipe.
  • the advantage of this variant is that the heat can be distributed optimally and homogeneously on and/or in the drip tray.
  • the pulsating heat pipe forms The drip tray itself.
  • the pulsating heat pipe ensures optimal heat distribution within the drip tray.
  • the drip tray can be thermally insulated at the bottom.
  • the component to be cooled can be operated in an energy-inefficient manner, so that more waste heat is generated than with energy-efficient operation.
  • the component to be cooled then takes over the function of the electrical heating and an electrical heating element can be dispensed with as an additional component.
  • the heat pump comprises a further electrical heating element, wherein the further electrical heating element is arranged on the drip tray and/or integrated into the drip tray and is intended to heat the drip tray, in particular directly.
  • a further electrical heating element can be arranged on the drip tray as a further heat source.
  • the further electrical heating element is provided in particular to heat the drip tray directly.
  • the drip tray can be heated with the further electrical heating element alone without introducing a heat flow Q by means of the pulsating heat pipe.
  • the drip tray can be heated with the further electrical heating element at the same time (in addition) to introducing a heat flow Q by means of the pulsating heat pipe.
  • the additional electrical heating element should be designed in such a way that it can heat the entire drip tray, thus preventing local ice formation.
  • the pulsating heat pipe that transfers waste heat and the additional electrical heating element thus form a hybrid heating system for the drip tray. This can be of interest at those operating points of the heat pump where there is no or insufficient waste heat available to adequately heat the drip tray.
  • the temperature of the electrical heating element and/or the additional electrical heating element can be regulated to the temperature of the component to be cooled based on its electrical current supply. If the temperature of the component to be cooled is above a predefined temperature, the electrical heating element is not supplied with current. If the temperature is below another predefined temperature, the electrical heating element is supplied with current in such a way that the temperature rises above the predefined temperature again.
  • the power supply to the electrical heating element and/or the further electrical heating element for the purpose of generating heat can also be controlled based on a predefined target temperature of the drip tray.
  • the power supply to the electric heating element and/or the additional electric heating element for the purpose of generating heat can be controlled based on the temperature of the drip tray. It may be useful to keep the drip tray at a temperature, particularly just above the freezing point (0 °C) of the condensate.
  • the pulsating heat pipe has at least one first heat exchanger section for heat-conducting connection to one or more heat sources and/or at least one second heat exchanger section for heat-conducting connection to the drip tray.
  • the first heat exchanger section can be connected to the heat source, in particular to a component of the heat pump that heats up during heat pump operation.
  • the first heat exchanger section serves in particular to absorb heat from the heat source and to evaporate the liquid working fluid.
  • the first heat exchanger section can in particular function as an evaporator section of the pulsating heat pipe.
  • the first heat exchanger section includes a first channel structure section with a first section of the microchannel.
  • the pulsating heat pipe can also have two or more first heat exchanger sections.
  • the two or more first heat exchanger sections can be connected to one and the same heat source.
  • the two or more first heat exchanger sections can be connected to two or more heat sources.
  • the second heat exchanger section can be connected to the drip tray.
  • the second heat exchanger section serves in particular to condense the vaporous working fluid and to release heat to the drip tray.
  • the second heat exchanger section can in particular function as a condenser section of the pulsating heat pipe.
  • the second heat exchanger section comprises a second channel structure section with a second section of the microchannel.
  • the pulsating heat pipe can also have two or more second heat exchanger sections.
  • the two or more second heat exchanger sections can be connected to two or more sections of the drip tray.
  • a second heat exchanger section can be connected to a bottom of the drip tray.
  • Another second heat exchanger section can be connected to a side wall of the drip tray.
  • An intermediate heat exchanger section which can also be referred to as an adiabatic zone, can be arranged between the first heat exchanger section and the second heat exchanger section of the pulsating heat pipe.
  • the intermediate heat exchanger section can comprise an intermediate channel structure section with an intermediate microchannel section and is advantageously thermally insulated.
  • this intermediate heat exchanger section does not necessarily have to be present; it is optional depending on the application, and it does not necessarily have to be thermally insulated.
  • At least the first section of the microchannel and the second section of the microchannel together form a continuous microchannel of the pulsating heat pipe. If an intermediate heat exchanger section is present, the first section of the microchannel, the second section of the microchannel and the intermediate microchannel section can also together form a continuous microchannel of the pulsating heat pipe.
  • the pulsating heat pipe can comprise one or more microchannels.
  • the pulsating heat pipe advantageously comprises at least one meandering microchannel.
  • a heat transfer contact surface can be enlarged and made particularly effective.
  • the heat transfer contact surface can be changed by a length and a spacing of the meandering microchannel loops.
  • the pulsating heat pipe or the microchannel is divided into at least two fluidically connected heat exchanger sections.
  • the microchannel can be arranged in a meandering shape in both heat exchanger sections.
  • the heat from the heat source can be spread from the point where the heat is introduced into the pulsating heat pipe (for example, a relatively small heat transfer contact area between the pulsating heat pipe and the heat source) to the point where the heat is extracted into the drip tray (for example, a relatively large heat transfer contact area between the pulsating heat pipe and the drip tray).
  • the pulsating heat pipe thus functions as a heat spreading element.
  • the drip tray is designed as a heat exchanger section of the pulsating heat pipe.
  • the drip tray can be designed as a second heat exchanger section.
  • the second heat exchanger section can be integrated into the drip tray.
  • the drip tray has at least one boundary wall, wherein a second meandering channel structure section is formed in the boundary wall or on the boundary wall of the drip tray.
  • the second channel structure section is part of a channel structure of the pulsating heat pipe and is formed as a, in particular second, heat exchanger section of the pulsating heat pipe.
  • the second channel structure section can be integrated into the drip tray.
  • the heat source has at least one boundary wall, wherein a first meandering channel structure section is formed in the boundary wall or on the boundary wall of the heat source.
  • the first channel structure section is part of a channel structure of the pulsating heat pipe and is formed as a, in particular first, heat exchanger section of the pulsating heat pipe.
  • the first channel structure section can be integrated into the heat source.
  • a channel structure is understood here to mean in particular a geometric structure of the microchannel of the pulsating heat pipe.
  • a Channel structure section should be understood here in particular as a geometric structure of a part of the channel structure.
  • the second channel structure section serves in particular as the second heat exchanger section of the pulsating heat pipe for condensing the working fluid.
  • the first channel structure section serves in particular as the first heat exchanger section of the pulsating heat pipe for evaporating the working fluid.
  • the drip tray and/or the heat source have at least one boundary wall, in particular at least one base and/or at least one side wall.
  • the at least one boundary wall can in particular be bowl-shaped, cuboid-shaped or box-shaped.
  • the boundary wall of the drip tray comprises at least one, in particular extruded, multi-channel element and/or micro-channel element and/or multi-port element for forming the channel structure section.
  • the boundary wall of the heat source comprises at least one, in particular extruded, multi-channel element (also called micro-channel element and/or multi-port element) for forming the channel structure section.
  • multi-channel element also called micro-channel element and/or multi-port element
  • the multi-channel element has at least one tubular microchannel, in particular a plurality of tubular microchannels, the diameter of which is advantageously approximately in the range of 0.5 millimeters to 2 millimeters.
  • the one microchannel or the plurality of microchannels run longitudinally through the element, in particular parallel to one another.
  • the multi-channel element can in particular comprise a section of a flat, extruded and/or extruded profile.
  • the at least one multi-channel element can be provided with corresponding front-side boundary walls or end caps at its ends. These end caps also have microchannels.
  • the end caps are designed, on the one hand, to connect the microchannels of the multi-channel elements in a working fluid-tight manner to form a meandering channel system.
  • the end caps are also designed, on the other hand, to form the drip tray together with the multi-channel elements.
  • the boundary wall of the drip tray has at least one, in particular deep-drawn, punched or embossed, channel-shaped recess for forming the channel structure section, wherein the recess is circumferentially closed by a second wall adjacent to the boundary wall.
  • the boundary wall of the heat source has at least one, in particular deep-drawn, punched or embossed, channel-shaped recess for forming the channel structure section, wherein the recess is circumferentially closed by a second wall adjacent to the boundary wall.
  • heat transfer from the heat source via the pulsating heat pipe to the drip tray can be achieved with particularly lightweight components.
  • the boundary wall comprises a sheet metal to form a wall surface.
  • the channel or channels run, for example in a meandering shape, through the channel-shaped depressions in the sheet metal.
  • the channel or channels can be closed by another sheet metal adjacent to the boundary wall or placed on top of the boundary wall.
  • the boundary wall and the other sheet metal are connected to one another in a working fluid-tight manner by welding, laser welding, friction stir welding, resistance welding, roll bonding or brazing.
  • the pulsating heat pipe has a channel structure through which flow can pass and at least one first actuator and is designed as a switchable pulsating heat pipe.
  • the first actuator is designed to interrupt and/or open the continuity of the channel structure by switching.
  • heating of the drip tray can be switched on or off as required.
  • the first actuator can in particular be designed as a switchable valve with which the first channel structure and/or the first heat exchanger section can be fluidically separated from and/or reconnected to the second channel structure and/or the second heat exchanger section.
  • At least one of the heat exchanger sections has an actuator and is designed as a switchable heat exchanger section.
  • a second actuator is designed in particular to interrupt and/or release a heat conduction between the second heat exchanger section and the drip tray.
  • a third actuator is designed in particular to switchably interrupt and/or release a heat conduction between the first heat exchanger section and the heat source.
  • heating of the drip tray can be switched on or off as required.
  • the actuator can in particular be designed as a switchable mechanism with which the heat-conducting connection can be removed or re-established.
  • the second heat exchanger section can be spatially separated from the drip tray and/or reconnected to it using the second actuator.
  • the first heat exchanger section can be spatially separated from the heat source or reconnected to it using the third actuator.
  • the switchable mechanism can in particular be a temperature-based switchable mechanism that removes the thermal connection of the heat exchanger section to the drip tray and/or the heat source above a certain temperature.
  • the mechanism can comprise a bimetal element or a bimetal spring.
  • a thermally conductive connection can be created and/or improved by means of a flexible thermal interface material, such as a thermal paste, a thermal mat or a thermal pad.
  • temperature-controlled heating of the drip tray can be achieved by means of targeted dry out of the pulsating heat pipe.
  • heating of the drip tray can be switched on or off as required.
  • the well-known physical effect of dry out should actually be avoided, since the pulsating heat pipe no longer transfers heat above a limit temperature. Once this limit temperature is reached and above, at least the first heat exchanger section and/or large areas of the channel structure or the entire channel structure are completely filled with the vapor phase of the working fluid. The pulsating movement of the working fluid therefore comes to a standstill and almost no more heat is dissipated.
  • the dry out is deliberately used to switch off the pulsating heat pipe above the limit temperature.
  • This effect can be specifically brought about by the structural design and the choice of the working fluid.
  • the decisive parameters are, for example, the type of working fluid, the filling quantity of the channel structure with working fluid in relation to the channel volume of the pulsating heat pipe, the diameter of the channel structure, the surface quality of the channel structure and the density of the channel structure.
  • the heat pump comprises a first pulsating heat pipe and a second pulsating heat pipe, wherein the first pulsating heat pipe and the second pulsating heat pipe are arranged in series.
  • the first pulsating heat pipe connects the drip tray to a heat conducting element.
  • the second pulsating heat pipe connects the heat conducting element to the at least one heat source.
  • An electrical heating element is arranged on the heat conducting element as a further heat source.
  • the heat conducting element is advantageously at an intermediate temperature level between a temperature of the heat source and a temperature of the drip tray.
  • the heat conducting element can, for example, comprise a small block, in particular a metal block, whose temperature is regulated to a value between the heat source temperature and the drip tray temperature.
  • the heat conducting element thus represents a heat source for the first pulsating heat pipe (with the drip tray as a heat sink) and at the same time a heat sink for the second pulsating heat pipe (with the component to be cooled as a heat source).
  • the electrical heating element arranged on the heat conducting element as a further heat source can be formed, for example, by a Peltier element.
  • Such a design with a first pulsating heat pipe and a second pulsating heat pipe, connected via a heat conducting element, is particularly advantageous when the heat source has too low a temperature level or too low a heat output.
  • the temperature level of the second pulsating heat pipe can be raised to the usable temperature level of the first pulsating heat pipe with high efficiency.
  • the pulsating heat pipe has a flow-through channel structure which is or can be filled with a refrigerant as a working fluid.
  • a refrigerant as a working fluid.
  • the refrigerants R1233zd(E), R1234ze, R1234yf or propane are suitable for use as a working fluid.
  • a pulsating heat pipe for heating the drip tray can be operated particularly effectively.
  • Figure 1 shows the basic structure of the exemplary heat pump 100.
  • the exemplary embodiment is an air-water heat pump 100 with an evaporator 102, a compressor 104, a condenser 106 and an expansion device 108.
  • the aforementioned components are connected by means of piping elements 110 to form a refrigerant circuit through which refrigerant 50 can flow on the primary side.
  • the heat pump 100 further comprises a fan 112 for conveying an outside air flow 10, which flows through the evaporator 102 on the secondary side.
  • the heat pump 100 further comprises a control unit 114 for controlling the compressor 104, the expansion device 108 and the fan 112.
  • the control unit 114 can comprise control electronics, power electronics and/or an inverter.
  • the heat pump 100 further comprises a connection device 116 for connecting the heat pump 100, in particular the condenser 106, to an external consumer, for example a heating water flow 20 circulating in a heating circuit.
  • the heat pump 100 further comprises a drip tray 118 which is assigned to the evaporator 102.
  • the drip tray 118 is arranged in particular in the direction of gravity 30 under the evaporator 102 and serves to collect and drain condensate 40 and/or condensate ice 40 which can arise during operation of the heat pump 100.
  • the heat pump 100 extracts heat from a first heat reservoir at a low temperature level, raises this heat to a higher temperature level by means of the compressor 104, and releases heat to a second heat reservoir. At least two operating states can be distinguished.
  • the first heat reservoir can be, for example, the outside air flow 10 and the second heat reservoir can be the heating water flow 20.
  • Humidity in the outside air flow 10 can condense on the evaporator 102 to form condensate 40 and drip into the drip tray 118. Under certain operating conditions and outside air conditions the condensate 40 can also freeze on the evaporator 102 to form condensate ice 40.
  • the evaporator 102 In a defrosting mode (also in a cooling mode) of the heat pump 100, the evaporator 102 is heated.
  • the heating of the evaporator 102 can be achieved, for example, by reversing the flow direction (see dashed arrow 52) of the coolant 50 in the coolant circuit. This reversal of the flow direction can be made possible in particular by means of a four-way valve (not shown here).
  • the first heat reservoir can be, for example, the heating water flow 20 and the second heat reservoir can be the outside air flow 10. Any condensation ice 40 on the evaporator 102 is melted and drips into the drip tray 118.
  • condensate 40 and/or condensate ice 40 can drip or fall from the evaporator 102 into the drip tray 118.
  • the condensate 40 can also freeze in the drip tray 118 to form condensate ice 40, in which case a safe drainage of condensate 40 from the drip tray 118 is no longer guaranteed.
  • the heat pump 100 further comprises a pulsating heat pipe 200.
  • the pulsating heat pipe 200 establishes a heat-conducting and/or heat-transferring connection between a heat source 120 and the drip tray 118.
  • the control unit 114 serves as the heat source 120.
  • the pulsating heat pipe 200 is designed and arranged such that it can be used to cool the heat source 120 and heat the drip tray 118.
  • Figure 2 shows the basic structure of the Pulsating Heat Pipe 200.
  • the pulsating heat pipe 200 comprises a channel structure 202 that is closed in a ring-shaped manner to form an endless loop and has a tubular microchannel 204 formed concentrically therein.
  • the channel structure 202 is arranged in a meandering shape at least in sections.
  • the microchannel 204 is partially filled with a working fluid, in particular a coolant.
  • the pulsating heat pipe 200 is designed to dissipate heat from thermal hotspots and To this end, the pulsating heat pipe has a first heat exchanger section 206 for thermally conductive connection to a heat source and a second heat exchanger section 208 for thermally conductive connection to a heat sink.
  • the first heat exchanger section 206 acts as an evaporator of the pulsating heat pipe 200 for the working fluid, here a heat flow Q from a heat source is introduced into the pulsating heat pipe 200 or into the working fluid in the microchannel 204.
  • the working fluid evaporates locally and pressure gradients arise that transport the working fluid through the microchannel 204.
  • the vapor bubbles migrate into the second heat exchanger section 208, which acts as a condenser of the pulsating heat pipe 200 for the working fluid, where they condense.
  • the heat flow Q from the pulsating heat pipe 200 is coupled out into a heat sink.
  • the Pulsating Heat Pipe 200 in the Heat Pump 100 can always be used as a heat-conducting and/or heat-transferring connection between a heat source and a heat sink.
  • the advantage compared to a classic heat exchanger is that there are hardly any restrictions that arise from the arrangement of the components and the design.
  • the waste heat dissipation from the heat source and the heat transfer to the heat sink can be solved regardless of geometry and position.
  • the term "geometry-independent” should be understood here in particular to mean that the pulsating heat pipe 200 can be adapted to at least almost any geometry of the heat source at the location of heat introduction and/or the heat sink at the location of heat dissipation.
  • the term "position-independent” should be understood here in particular to mean that the spatial position of the heat source and heat sink relative to one another has at least almost no influence on the function of the pulsating heat pipe 200 connecting them in a heat-conducting and/or heat-transferring manner.
  • the spatial distance between the heat source 120 and the heat sink can be bridged by the pulsating heat pipe 200. Intentionally spatially separated areas can remain separate and heat transfer between the areas is still possible.
  • an inverter on the one hand and areas with a possibly flammable heat pump coolant on the other hand can be spatially separated from each other and yet be connected to each other in a heat-conducting and/or heat-transferring manner.
  • An intermediate heat exchanger section 212 is arranged between the first heat exchanger section 206 and the second heat exchanger section 208.
  • the intermediate heat exchanger section 212 can comprise an intermediate channel structure section with an intermediate microchannel section and is advantageously thermally insulated.
  • the intermediate heat exchanger section 212 serves in particular for heat conduction and/or heat transfer within the pulsating heat pipe 200.
  • All technical refrigeration circuits for example heat pumps 100 and refrigeration machines
  • an air-refrigerant evaporator 102 can benefit from the invention.
  • this also applies in particular to evaporators in cold stores.
  • Pulsating Heat Pipe 200 compared to a classic heat exchanger or a classic heat pipe are: There are hardly any restrictions resulting from the arrangement of the components and the design.
  • the spatial distance between the heat source and the heat sink can be bridged by the Pulsating Heat Pipe 200.
  • Intentionally spatially separated components or areas of the heat pump 100 can remain separate and heat transfer between the components or areas is still possible. If an inverter is in close proximity to the components of the refrigerant circuit, it could unintentionally represent an ignition source for a flammable refrigerant such as propane; when using a Pulsating Heat Pipe 200 for heat transfer between the inverter and the drip tray 118, these can still be arranged slightly spatially separated.
  • Figure 3 shows a first embodiment of the pulsating heat pipe arrangement.
  • the first heat exchanger section 206 of the pulsating heat pipe 200 is designed in the form of a meandering first channel structure section.
  • the first heat exchanger section 206 is connected to a heat source 120 in a heat-conducting manner.
  • the first heat exchanger section 206 could be integrated in the heat source 120, for example in housing walls of the heat source 120.
  • the second heat exchanger section 208 has a meandering second channel structure section.
  • the second heat exchanger section 208 is connected to the drip tray 118 in a heat-conducting manner.
  • the second heat exchanger section 208 is integrated in the drip tray 118, for example in boundary walls of the drip tray 118.
  • the microchannels 204 of the second heat exchanger section 208 run in a meandering shape, in particular through the base 122 and/or the side walls 124 of the drip tray 118.
  • the microchannels 204 are led from the drip tray 118 to a first heat exchanger section 206, which is connected in a heat-conducting manner to a heat source 120.
  • a heat source 120 This can be any warm component of the heat pump 100 that emits sufficient thermal power dissipation.
  • the first heat exchanger section 206 of the pulsating heat pipe 200 is then thermally connected to the warm component and thus absorbs the heat of the component.
  • the first heat exchanger section 206 on the warm component thus represents the evaporator section of the pulsating heat pipe 200.
  • the heat is then transported into the microchannels 204 of the second heat exchanger section 208 on the drip tray 118 by the transport mechanism of the pulsating heat pipe 200. There, the heat is transferred to the drip tray 118 and to the condensate 40 in the drip tray 118. Any condensate ice 40 in the drip tray 118 is thus melted, or the heat transfer prevents condensate ice 40 from forming in the drip tray 118 at all.
  • the second heat exchanger section 208 on the drip tray 118 thus represents the condenser section of the pulsating heat pipe 200.
  • the spatial distance between the heat source 120 and the drip tray 118 is bridged by the Pulsating Heat Pipe 200.
  • An intermediate heat exchanger section 212 is arranged between the first heat exchanger section 206 and the second heat exchanger section 208.
  • the intermediate heat exchanger section 212 comprises an intermediate channel structure section with an intermediate microchannel section and is advantageously thermally insulated (not shown here).
  • the intermediate heat exchanger section 212 serves in particular for heat conduction and/or heat transfer within the pulsating heat pipe 200.
  • the Pulsating Heat Pipe 200 can also be bent, the heat can also be extracted from the heat source 120 in a plane that is not parallel to the drip tray 118. As in Figure 3 As can be seen, this could be achieved by a 90° bend, in particular in the area of the intermediate heat exchanger section 212.
  • the first heat exchanger section 206 and the second heat exchanger section 208 can also be designed spatially and thus connected in a heat-conducting manner to non-planar sections of the drip tray 118 or the heat source 120.
  • Figure 3 also shows the possible size design of the heat exchanger surface of the first heat exchanger section 206 or the second heat exchanger section 208, which can be achieved with the pulsating heat pipe. If the meander loops are packed more closely (first heat exchanger section 206), heat can be transferred on a small heat exchanger surface with a high density, while the larger heat exchanger surface of the second heat exchanger section 208 has a larger distance and thus a lower density of the meander loops.
  • Figure 4 shows a second embodiment of a pulsating heat pipe arrangement.
  • An inverter 128 of the heat pump 100 is arranged in the electronics box 126.
  • the compressor 104 of the heat pump 100 in particular the delivery capacity of the compressor 104, can be controlled and/or regulated using the inverter 128.
  • the waste heat generated by the inverter 128 during heat pump operation must be dissipated in order to protect it from overheating.
  • the inverter 128 is a component of the heat pump 100 that is warm during heat pump operation and can serve as a heat source 120 for the pulsating heat pipe 200.
  • the waste heat dissipation from the inverter 128 can be solved independently of geometry and position using the pulsating heat pipe 200.
  • the waste heat flow is used to heat the drip tray 118.
  • a first heat exchanger section 206 of the pulsating heat pipe 200 is thermally connected to the inverter 128 or integrated into the inverter 128.
  • a second heat exchanger section 208 is thermally connected to the drip tray 118 or integrated into the drip tray 118.
  • the drip tray 118, the pulsating heat pipe 200 and the inverter 128 can also be developed as a coupled unit.
  • a heat flow must be supplied to the pulsating heat pipe 200 at the evaporator section.
  • the heat pump 100 there are several components or locations that are suitable as heat sources 120, since their heat flow or waste heat flow has not been used according to the state of the art.
  • the efficiency of the heat pump 100 is only reduced very slightly by using the heat flow, or ideally even increased.
  • Suitable heat sources 120 are waste heat from the compressor 104; waste heat from the inverter 128 or the electronics box 126 ("hot box"); a pipe element 110 downstream of the condenser 106 and upstream of the expansion device 108; heat from a heating circuit connected to the heat pump 100, preferably heat from a return of the heating circuit; waste heat from the evaporator 102 during defrosting operation.
  • Figure 5 shows a section of a simplified third embodiment of a pulsating heat pipe arrangement.
  • the pulsating heat pipe 200 connects the drip tray 118 to a warm component of the heat pump 100 in a heat-conducting and/or heat-transferring manner.
  • the pulsating heat pipe 200 has a first heat exchanger section 206 for heat-conducting connection to the heat source 120 and a second heat exchanger section 208 for heat-conducting connection to the drip tray 118.
  • the heat-conducting connection between heat source 120 and pulsating heat pipe 200 is produced and/or improved by means of a thermal interface material 130.
  • the first heat exchanger section 206 has an actuator 210 and is designed as a switchable heat exchanger section.
  • the actuator 210 is designed to switchably interrupt and/or release a heat conduction between the first heat exchanger section 206 and the heat source 120.
  • the heat conduction is established or released by an intimate contact between the first heat exchanger section 206, the thermal interface material 130 and the heat source 120.
  • the heat conduction can also be established or released directly by an intimate contact between the first heat exchanger section 206 and the heat source 120.
  • the heat conduction is interrupted or significantly reduced because the intimate contact between the first heat exchanger section 206, the thermal interface material 130 and/or the heat source 120 is interrupted.
  • the first heat exchanger section 206 is lifted off the thermal interface material 130, so that a gap, in particular an air gap, is formed between the first heat exchanger section 206 and the thermal interface material 130.
  • the first heat exchanger section 206 can also lift off the heat source 120 together with the thermal interface material 130, so that a gap, in particular an air gap, is formed between the thermal interface material 130 and the heat source 120.
  • the first heat exchanger section 206 is designed to be flexible or deformable.
  • the first heat exchanger section 206 is connected to the pulsating heat pipe 200 in a flexible or deformable manner.
  • the actuator 210 which in this case comprises a bimetal element or a bimetal spring, interrupts the intimate contact between the first heat exchanger section 206, the thermal interface material 130 and/or the heat source 120.
  • the actuator 210 is a mechanism that can be switched on the basis of a temperature of the first heat exchanger section 206 and that removes the thermal connection of the first heat exchanger section 206 to the heat source 120 from a certain limit temperature of the first heat exchanger section 206.
  • the bimetal element or the bimetal spring is connected to the first heat exchanger section 206 in a heat-conducting manner. This prevents any overheating of the first heat exchanger section 206.
  • the limit temperature can be designed, for example, based on a selected material, a selected thickness and/or a selected preload of the bimetal element or the bimetal spring.
  • the pulsating heat pipe 200 and thus the heating of the drip tray 118 can be switched on and/or off as required.
  • Figure 6 shows a first and second embodiment of a drip tray 118 in cross section.
  • the drip tray 118 serves to catch, collect and drain condensate 40.
  • the drip tray 118 has a base 122, an outlet opening (not shown here) in the base 122 for draining the condensate 40 from the drip tray 118 and several side walls 124.
  • the drip tray 118 forms a flat container that is open at the top in the direction of gravity and in which the condensate falling from the heat pump evaporator 102 Condensation drops 40 can be collected.
  • a meandering channel structure section is formed on the bottom 122, which is part of a channel structure of the pulsating heat pipe 200 and is designed as a second heat exchanger section 208 of the pulsating heat pipe 200.
  • the bottom 122 of the drip tray 118 is essentially flat.
  • a second wall 123 adjacent to the bottom 122 has, for example, deep-drawn, punched or embossed, channel-shaped depressions for forming the channel structure section. These depressions are circumferentially closed by the bottom 122, so that the microchannel 204 that forms is tight to the working fluid.
  • the bottom 122 of the drip tray 118 has, for example, deep-drawn, punched or embossed, channel-shaped depressions for forming the channel structure section. These depressions are circumferentially closed by a second wall 123 adjacent to the bottom 122, so that the microchannel that is formed is tight to the working fluid.
  • FIGS. 7, 8 and 9 show further embodiments of a drip tray 118 in cross section.
  • the bottom 122 of the drip tray 118 in Figure 7 is formed from two multi-channel elements 132.
  • the bottom 122 of the drip tray 118 in Figure 8 is formed from a multi-channel element 132, two further multi-channel elements 132 form the right and left side walls 124.
  • the bottom 122 of the drip tray 118 in Figure 9 is formed from six multi-channel elements 132.
  • these multi-channel elements 132 are made of flat extruded profiles, which in this case are each penetrated by two or three microchannels 204. Due to their obtuse-angled arrangement to one another and with a front and rear end-face boundary wall 124 (end caps), they form a flat container that is open upwards in the direction of gravity and in which the condensate drops 40 falling from the heat pump evaporator 102 can be collected.
  • the multiple microchannels 204 of the Multi-channel elements 132 are connected by corresponding further microchannels in the front-side boundary walls 124 to form a meandering channel structure section, which is part of a channel structure of the pulsating heat pipe 200 and is designed as a second heat exchanger section 208 of the pulsating heat pipe 200.
  • Figure 10 shows a fourth embodiment of a pulsating heat pipe arrangement in two different operating states.
  • the pulsating heat pipe 200 connects the drip tray 118 and the heat pump evaporator 102 in a heat-conducting and/or heat-transferring manner.
  • the coolant of the coolant circuit evaporates in the heat pump evaporator 102.
  • the heat pump evaporator 102 is colder than the drip tray 118 and the air surrounding it. Heat is transferred from the drip tray 118 to the heat pump evaporator 102 via the pulsating heat pipe 200.
  • the drip tray 118 advantageously acts as an extension of the heat pump evaporator 102 and provides additional heat from the environment. The transferred heat improves the evaporation and thus increases the efficiency of the heat pump 100.
  • the heat pump evaporator 102 is heated in order to melt condensate ice 40 on the evaporator surface.
  • the heat pump evaporator 102 is warm. Heat is transferred from the heat pump evaporator 102 to the drip tray 118 via the pulsating heat pipe 200.
  • the drip tray 118 is heated, any condensate ice 40 in the drip tray 118 is melted and can drain off via the outlet.
  • An advantage of using the heat pump evaporator 102 as a heat source 120 for the pulsating heat pipe 200 is that the drip tray 118 is heated by the pulsating heat pipe 200 only during the period in which increased condensation water 40 and condensation water ice 40 accumulate in the drip tray 118.
  • Figure 11 shows the basic structure of another exemplary heat pump 100.
  • the basic structure of the other exemplary heat pump 100 corresponds to the principle of Figure 1 , the description of which is referred to here.
  • the heat pump 100 comprises a first pulsating heat pipe 200 and a second pulsating heat pipe 200a.
  • the first pulsating heat pipe 200 establishes a heat-conducting and/or heat-transferring connection between a first heat source 120 and the drip tray 118.
  • the second pulsating heat pipe 200a establishes a heat-conducting and/or heat-transferring connection between a second heat source 120a and the drip tray 118.
  • control unit 114 serves as the first heat source 120.
  • An electrical heating element 300 serves as the second heat source 120a.
  • the first pulsating heat pipe 200 and the second pulsating heat pipe 200a are designed and arranged such that they can be used to cool the heat sources 120, 120a and to heat the drip tray 118.
  • the first pulsating heat pipe 200 and the second pulsating heat pipe 200a are arranged in parallel with regard to the heat flows conveyed by them to the drip tray 118, so that each of the two pulsating heat pipes 200, 200a connects the drip tray 118 to a heat source 120, 120a in a heat-conducting manner and can heat it.
  • the drip tray 118 can be heated by the two pulsating heat pipes 200, 200a together, in particular simultaneously.
  • the drip tray 118 can be heated by each of the two pulsating heat pipes 200, 200a alone. This is decided depending on a heating requirement and the available heat supply, in particular from the first heat source 120.
  • Figure 12 shows a fifth embodiment of a pulsating heat pipe arrangement as a section of an overall structure of a heat pump 100 according to the invention.
  • the basic structure of the pulsating heat pipe arrangement corresponds to the principle of Figure 4 , the description of which is referred to here.
  • Shown is a unit or assembly comprising an electronics box 126 of the heat pump 100, the pulsating heat pipe 200 and the drip tray 118.
  • An inverter 128 of the heat pump 100 is arranged in the electronics box 126.
  • the inverter 128 can serve as a heat source 120 for the pulsating heat pipe 200.
  • the waste heat flow from the inverter 128 is used to heat the drip tray 118.
  • a first heat exchanger section 206 of the pulsating heat pipe 200 is connected in a heat-conducting manner to the inverter 128 or is integrated into the inverter 128.
  • An electrical heating element 300 is also connected in a heat-conducting manner to the pulsating heat pipe 200, in particular to the first heat exchanger section 206 of the pulsating heat pipe 200. When electrically energized, the electrical heating element 300 can generate a heat flow that can also be used to heat the drip tray 118.
  • a second heat exchanger section 208 of the pulsating heat pipe 200 is connected to the drip tray 118 in a heat-conducting manner or is integrated into the drip tray 118.
  • the drip tray 118, the pulsating heat pipe 200, the inverter 128 and the electrical heating element 300 can also be designed as a coupled unit.
  • Figure 13 shows a sixth embodiment of a pulsating heat pipe arrangement as a section of an overall structure of a heat pump 100 according to the invention.
  • the basic structure of the pulsating heat pipe arrangement corresponds to the principle of Figure 4 , the description of which is referred to here.
  • the pulsating heat pipe arrangement comprises a first pulsating heat pipe 200 and a second pulsating heat pipe 200b connected in series.
  • the first pulsating heat pipe 200 connects the drip tray 118 in a heat-conducting manner to a heat-conducting element 400.
  • the second pulsating heat pipe 200b connects the heat-conducting element 400 in a heat-conducting manner to the heat source 120, here designed as an inverter 128.
  • a heat flow that is introduced into the second pulsating heat pipe 200b by the inverter 128 flows to the heat-conducting element 400, from there into the first pulsating heat pipe 200 and into the drip tray 118.
  • An electrical heating element 300 is arranged on the heat conducting element 400 as a further heat source 120b.
  • the electrical heating element 300 can generate a further heat flow, which can also be introduced into the first pulsating heat pipe 200 and transferred to the drip tray 118.
  • Figure 14 shows a seventh embodiment of a pulsating heat pipe arrangement as a section of an overall structure of a heat pump 100 according to the invention.
  • the pulsating heat pipe arrangement comprises a pulsating heat pipe 200, an electric heating element 300 as the sole heat source 120 and a drip tray 118.
  • the pulsating heat pipe 200 connects the drip tray 118 to the electric heating element 300 in a heat-conducting manner.
  • the electric heating element 300 can generate a heat flow that can be introduced into the pulsating heat pipe 200 and transferred to the drip tray 118.
  • Figure 15 shows an eighth embodiment of a pulsating heat pipe arrangement as a section of an overall structure of a heat pump 100 according to the invention.
  • the basic structure of the pulsating heat pipe arrangement corresponds to the principle of Figure 4 , the description of which is referred to here.
  • the heat pump 100 comprises a further electrical heating element 302, which is arranged on the drip tray 118.
  • the further electrical heating element 302 can generate a heat flow and is intended to heat the drip tray 118, in particular directly.
  • Figure 16 schematically shows various forms of attachment of an electrical heating element 300 to a pulsating heat pipe 200, in particular to a first heat exchanger section 206 of the pulsating heat pipe 200, and/or to a heat conducting element 400.
  • the electric heating element 300 can be Figure 16a glued, soldered, welded or shrunk onto the Pulsating Heat Pipe 200.
  • the electrical heating element 300 can be Figure 16b be clamped onto the Pulsating Heat Pipe 200 by means of a clamping element 304.
  • the electrical heating element 300 can additionally be geometrically embedded in the pulsating heat pipe 200.
  • an electrical heating element 300 to a pulsating heat pipe 200 or to a heat conducting element 400 can be improved in terms of heat transfer by means of a thermal interface material, for example a thermal paste, a thermal mat or a thermal pad.
  • a thermal interface material for example a thermal paste, a thermal mat or a thermal pad.
  • the electrical heating in particular by means of a heating mat or a heating cartridge, can be carried out as coherently as possible and with a large contact area in order to increase the efficiency of the heat transfer system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP24193111.2A 2023-08-07 2024-08-06 Pompe à chaleur Pending EP4506625A1 (fr)

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Citations (6)

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US4921041A (en) * 1987-06-23 1990-05-01 Actronics Kabushiki Kaisha Structure of a heat pipe
JP2000346532A (ja) * 1999-06-07 2000-12-15 Sanyo Electric Co Ltd 冷却装置
WO2009147803A1 (fr) * 2008-06-02 2009-12-10 ダイキン工業株式会社 Unité de pompe à chaleur et dispositif de production d’eau chaude par pompe à chaleur
JP2019100631A (ja) * 2017-12-04 2019-06-24 シャープ株式会社 室外機、空気調和機およびヒートポンプ式給湯機
CN110057123A (zh) * 2019-04-25 2019-07-26 北京建筑大学 脉动热管驱动压缩机余热除霜的蒸气压缩式循环系统
DE102020127554A1 (de) * 2020-10-20 2022-04-21 Vaillant Gmbh Verfahren und Vorrichtung zum Verhindern von Eisbildung in einer Wanne zum Sammeln von Kondensat eines Verdampfers einer Wärmepumpe

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JP2000346532A (ja) * 1999-06-07 2000-12-15 Sanyo Electric Co Ltd 冷却装置
WO2009147803A1 (fr) * 2008-06-02 2009-12-10 ダイキン工業株式会社 Unité de pompe à chaleur et dispositif de production d’eau chaude par pompe à chaleur
JP2019100631A (ja) * 2017-12-04 2019-06-24 シャープ株式会社 室外機、空気調和機およびヒートポンプ式給湯機
CN110057123A (zh) * 2019-04-25 2019-07-26 北京建筑大学 脉动热管驱动压缩机余热除霜的蒸气压缩式循环系统
DE102020127554A1 (de) * 2020-10-20 2022-04-21 Vaillant Gmbh Verfahren und Vorrichtung zum Verhindern von Eisbildung in einer Wanne zum Sammeln von Kondensat eines Verdampfers einer Wärmepumpe

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