EP1577624A2 - A heat pump - Google Patents

A heat pump Download PDF

Info

Publication number
EP1577624A2
EP1577624A2 EP05466002A EP05466002A EP1577624A2 EP 1577624 A2 EP1577624 A2 EP 1577624A2 EP 05466002 A EP05466002 A EP 05466002A EP 05466002 A EP05466002 A EP 05466002A EP 1577624 A2 EP1577624 A2 EP 1577624A2
Authority
EP
European Patent Office
Prior art keywords
coolant
air
piping
heat
heat exchanger
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.)
Granted
Application number
EP05466002A
Other languages
German (de)
French (fr)
Other versions
EP1577624A3 (en
EP1577624B1 (en
Inventor
Stanislav Mach
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.)
Individual
Original Assignee
Individual
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
Priority claimed from CZ20040367A external-priority patent/CZ296566B6/en
Priority claimed from CZ20040459A external-priority patent/CZ299573B6/en
Application filed by Individual filed Critical Individual
Publication of EP1577624A2 publication Critical patent/EP1577624A2/en
Publication of EP1577624A3 publication Critical patent/EP1577624A3/en
Application granted granted Critical
Publication of EP1577624B1 publication Critical patent/EP1577624B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/021—Alternate defrosting
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2515—Flow valves
    • 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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type

Definitions

  • the invention relates to a heat pump consisting of a pair of heat exchangers air/coolant connected to a coolant feed piping into a compressor and further connected to a coolant return piping from a heat exchanger coolant/water.
  • a low-temperature heat source can e.g. be an earth heat (from an appropriate hole) water heat or air heat.
  • auxiliary heating circuit in which is in the coolant return piping from the heat exchanger coolant/water (after coolant passes its heat to the heat consumer, for instance building heating) into the heat exchanger air/coolant formed an additional heat exchanger coolant/water because coolant has in the coolant return piping from the heat exchanger coolant/water into the heat exchanger air/coolant a residual temperature around 35°C to 40°C.
  • Water heated in the additional heat exchanger coolant/water is by means of the auxiliary circular pump led through the auxiliary piping into the heat exchanger air/coolant, which is this way heated and defrosted.
  • the goal of the technical solution intends to eliminate or at least to minimize the drawbacks of the art.
  • a heat pump whose principle consists in that a coolant return piping from the heat exchanger coolant/water is in front of the inlet to heat exchangers air/coolant split in two branches, from which each of them is connected to an evaporating inlet of one heat exchangers air/coolant, while each of the branches before entering one of the pair of heat exchangers air/coolant forms a heating piping of the second from the pair of heat exchangers air/coolant and each of the branches of the coolant return piping can be closed.
  • This solution enables by simply and relatively inexpensive means and without demands on a complex control device to provide a reliable and continuous melting the frost from the heat exchangers air/coolant and all that without a need to cut off the heating capacity flow of the heat .pump into the heat consumer, for instance building heating system because there is always melting the frost from one of the pair of heat exchangers air/coolant by means of a residual heat of the coolant, while the second heat exchanger air/coolant immediately after passing the coolant through the heat exchanger air/coolant that is being defrosted uses this coolant for taking-off the heat from the air.
  • control device of closing valves consists of a time control device.
  • each of the branches of the coolant return piping is fitted with a controllably closable bypass of its part forming a heating piping, which is according to one example embodiment formed that the first branch of the return piping is between the coolant return piping branching point and the first heating piping connected to the first auxiliary piping, which is to the first branch of the coolant return piping connected in front of the evaporation inlet of the second heat exchanger air/coolant, while the second branch of the return coolant piping is between the branching point of the coolant return piping and the second heating piping connected to the second auxiliary piping, which is to the second branch of the coolant return piping connected in front of the evaporating inlet of the first heat exchanger air/coolant and both auxiliary piping are fitted with a controllable valve connected to the control device.
  • Fig. 1 represents an arrangement of a heat pump without a controllably closable and openable bypass of its part forming a heating piping
  • Fig. 2 represents an arrangement of a heat pump with a controllably openable and closable bypass of its part forming a heating piping.
  • a heat pump consists of a compressor 1 , whose suction is connected by a feed piping 2 with a coolant outlet 33 from a pair of heat exchangers 3 air/coolant. Coolant in the outlet 33 from the heat exchangers 3 air/coolant transmits the heat taken off the air.
  • the compressor 1 compresses this coolant, by means of which the coolant temperature further increased, usually to values around 85° C. Coolant is from the compressor 1 led into a heat exchanger 4 coolant/water. Water heated in this way is further used for a heat consumer, for instance for a building heating etc.
  • coolant/water comes out coolant cooled down to a residual temperature usually around 35° C to 40° C and is by means of a coolant return piping 5 led towards the heat exchangers 31, 32 air/coolant, while the return piping 5 is in front of the heat exchangers 31 , 32 air/coolant split in two branches 51, 52 .
  • the first branch 51 of the coolant return piping 5 is through the first controllable closable valve 91 led into the first heat exchanger 31 air/coolant.
  • the first branch 51 of the coolant return piping 5 forms the first heating piping 81 for defrosting this heat exchanger 31 air/coolant.
  • From the first heat exchanger 31 air/coolant continues the first branch 51 into an evaporating inlet 320 of the second heat exchanger 32 air/coolant.
  • the second heat exchanger 32 air/coolant takes place a known coolant expansion coupled with a heat take-off from the air surrounding the second heat exchanger 32 air/coolant by means of coolant. Coolant with the heat gathered by this way is led though an outlet 33 into the coolant feed piping 2 towards the compressor 1 .
  • the second branch 52 of the coolant return piping 5 is through a second controllable closable valve 91 led into the second heat exchanger 32 .
  • air/coolant forms the second branch 52 of the coolant return piping 5 the second heating piping 82 for defrosting this heat exchanger 32 air/coolant.
  • From the second heat exchanger 32 air/coolant continues the second branch 52 into an evaporating inlet 310 of the first heat exchanger 32 air/coolant.
  • air/coolant takes place a known coolant expansion coupled with a heat take-off from the air surrounding the first heat exchanger 32 air/coolant by means of coolant. Coolant with the heat gathered by this way is led though an outlet 33 into the coolant feed piping 2 towards the compressor 1 .
  • Closing valves 91, 92 are for the automation purposes connected to appropriate control members, they can be for instance represented by electromagnetically operated valves connected to a competent control device.
  • An evaporating coolant inlet 310, 320 into the appropriate heat exchanger 31, 32 air/coolant consists of an appropriate evaporating jet 72, which provides coolant evaporation and its distribution into an appropriate heat exchanger 31, 32 air/coolant, where this coolant takes off heat from the air.
  • Heat exchangers 31, 32 air/coolant are fitted with a ventilator 30 connected to a drive for increasing the air circulation along heat transfer surfaces of the heat exchangers 31, 32 air/coolant.
  • Fig. 2 is the first branch 51 of the coolant return piping 5 between the branching point of the coolant return piping 5 to branches 51, 52 and the first heating piping 81 connected through the first auxiliary piping 510 with the point between the end of the first heating piping 81 and the evaporating inlet 320 of the second heat exchanger 32 air/coolant.
  • the first auxiliary piping 510 is fitted with a controllable valve 5100 .
  • first and the second auxiliary piping 510, 520 onto the point between the branching point of the coolant return piping 5 to branches 51, 52 and the heating piping 81 , 82 connected in the coolant flow direction behind the controllable valves 91, 92.
  • first and the second auxiliary piping 510, 520 onto the point between the branching point of the coolant return piping 5 to branches 51 , 52 and the heating piping 81, 82 connected in the coolant flow direction in front of the controllable valves 91, 92 .
  • the heat pump according to the invention operates for instance that the first closing valve 91 controlling the inlet of the coolant with a residual heat into the first branch 51 of the coolant return piping 5 is open and the second closing valve 92 controlling the inlet of the coolant with a residual heat into the second branch 52 of the coolant return piping 5 is closed.
  • the coolant with a residual heat flows first into the first exchanger 31 air/coolant as a heating medium and provides melting the frost from this first heat exchanger 31 air/coolant.
  • the coolant with a residual heat first flows into the second heat exchanger 32 air/coolant as a heating medium and provides melting the frost from this second heat exchanger 32 air/coolant, which served before for heat take-off from the air into the coolant.
  • the coolant flows into the first heat exchanger 32 air/coolant, where it expands and takes off the heat from the air and heated by this heat flows towards the compressor 1 , by means of which is compressed (temperature of coolant increases) and led into the heat exchanger 4 coolant/water, for instance for the building heating.
  • Switching the closing valves 9 ( 91 , 92 ) controlling the coolant influx into particular branches 51, 52 of the coolant return piping 5 can be controlled for instance on a simple time principle, when for a defined time period, e.g. 30 minutes, coolant flows through the first branch 51, then comes to switching and for another defined time period, for instance also 30 minutes, coolant flows through the second branch 52 .
  • the time span of operation of particular branches 51, 52 of the coolant return piping 5 can be also be controlled automatically, for instance according to actual humidity and temperature round heat exchangers 31, 32 air/coolant etc.
  • the pair of closing valves 91, 92 can be replaced for another appropriate control member, for instance a valve coupled with a control member controlling switching coolant between the branches 51, 52 etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Air Conditioning Control Device (AREA)
  • Central Heating Systems (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

The invention relates to a heat pump consisting of a pair of heat exchangers (31, 32) air/coolant connected to a coolant feed piping (2) into a compressor (1) and further connected to a coolant return piping (5) from a heat exchanger (4) coolant/water. The invention consists in that the coolant return piping (5) from the heat exchanger (4) coolant/water is before entering exchangers (31,32) air/coolant split in two branches (51, 52), where each of them is connected to an evaporating inlet of one heat exchanger (31, 32) air/coolant, while each of the branches (51, 52) before entering one of the pair of heat exchangers (31, 32) air/coolant forms a heating piping (81, 82) of the second from the pair of heat exchangers (31, 32) air/coolant and each of the branches (51, 52) of the coolant return piping (5) is closable.

Description

Technical field
The invention relates to a heat pump consisting of a pair of heat exchangers air/coolant connected to a coolant feed piping into a compressor and further connected to a coolant return piping from a heat exchanger coolant/water.
Background art
There are known heat pumps coupled with a low-temperature heat source. The low-temperature heat source is positioned outside of the building. The heat pump in a well-known manner heats coolant, which is through a circulating coolant piping led into a heat exchanger coolant/water inbuilt to the construction of the heat pump. This water is further used in a correspondent heat consumer, for instance in a building heating system for a building heating. A low-temperature heat source can e.g. be an earth heat (from an appropriate hole) water heat or air heat. Particularly in systems taking the heat off the air, which consist of a ventilator providing air circulating round pipes with coolant in the heat exchanger air/coolant, occurs however a frost formation on this part of pipes, or if you like on this exchanger, by means of which is decreased the heat take-off performance from the air and is decreased the heating capacity of the heat pump.
For decreasing or removing this negative effect is known a number of defrosting systems. Nevertheless it is not basically possible to use mechanical methods because in most cases this is the question of a frost on relatively tender members of the appliances and there is a danger of damage during removing the frost mechanically. Thus there is used a way of progressive defrosting.
There is known defrosting on a heat exchanger air/coolant using electric heating rods or cables built in the heat exchanger air/coolant, which is however demanding from the economical and operational point of view with regard to control of the entire defrosting process, i.e. turning on and off the entire process, when it is necessary to determine the right moment for starting and stopping the defrosting.
There is further known melting the frost from the heat exchanger air/coolant in the way that temporarily is turned off the heating capacity delivery of the heat pump into the heat consumer, for instance into the building heating system and the heating capacity of the heat pump is led into the heat exchanger air/coolant, which progressively defrosts. Consequently is again turned on the heating capacity delivery of the heat pump into the heat consumer, for instance into the building heating system.
There is also known use of an auxiliary heating circuit, in which is in the coolant return piping from the heat exchanger coolant/water (after coolant passes its heat to the heat consumer, for instance building heating) into the heat exchanger air/coolant formed an additional heat exchanger coolant/water because coolant has in the coolant return piping from the heat exchanger coolant/water into the heat exchanger air/coolant a residual temperature around 35°C to 40°C. Water heated in the additional heat exchanger coolant/water is by means of the auxiliary circular pump led through the auxiliary piping into the heat exchanger air/coolant, which is this way heated and defrosted.
There is also known an application of a pair of heat exchangers air/coolant, where in case of frost creation is on one exchanger switched the heat pump operation to the second heat exchanger air/coolant and concurrently is shut down heat transfer from the heat pump to the heat consumer, for instance building heating system and the entire heat produced by the heat pump is used to heat the shut-down heat exchanger air/coolant. After defrosting this heat exchanger air/coolant is stopped heat delivery into the heat exchanger air/coolant that is being defrosted and there is turned on the heat delivery from the heat pump to the heat consumer. In the moment of frost creation on the currently used heat exchanger air/coolant is switched to previously defrosted heat exchanger air/coolant, the heat delivery from the heat pump into the heat consumer is shut down and the entire heating capacity of the heat pump is used to melting the frosted heat exchanger air/coolant. The entire cycle is repeated continuously.
The common disadvantage of the last three mentioned solution is that for reaching the proper defrosting on the heat exchanger air/coolant is necessary to temporarily shut down the heat pump from the functioning into the heat consumer, for instance building heating system, by means of which occurs irregular heating capacity delivered to the heat consumer and thus for example occur temperature fluctuations inside the heated building or temperature fluctuations of sanitary water etc. and all that with all negative drawbacks. Another disadvantage of the background art are high demands on control of the entire defrosting system, when for the automated operation of the entire system must be used expensive and complex diagnostic technology increasing the price of the entire system and also the possibility of failure creation and heat pump outages. Because it is very difficult to monitor the frost extent and to determine the moment to turn on and off the frost melting and shut-down the heat pump from the heat consumer. During continuous run of the defrosting systems according to the background art would occur strong rise in price of the entire heat pump operation.
The goal of the technical solution intends to eliminate or at least to minimize the drawbacks of the art.
Principle of the invention
The goal of the invention has been reached by a heat pump, whose principle consists in that a coolant return piping from the heat exchanger coolant/water is in front of the inlet to heat exchangers air/coolant split in two branches, from which each of them is connected to an evaporating inlet of one heat exchangers air/coolant, while each of the branches before entering one of the pair of heat exchangers air/coolant forms a heating piping of the second from the pair of heat exchangers air/coolant and each of the branches of the coolant return piping can be closed.
This solution enables by simply and relatively inexpensive means and without demands on a complex control device to provide a reliable and continuous melting the frost from the heat exchangers air/coolant and all that without a need to cut off the heating capacity flow of the heat .pump into the heat consumer, for instance building heating system because there is always melting the frost from one of the pair of heat exchangers air/coolant by means of a residual heat of the coolant, while the second heat exchanger air/coolant immediately after passing the coolant through the heat exchanger air/coolant that is being defrosted uses this coolant for taking-off the heat from the air. By means of this is removed the necessity to cut off the heating capacity transmission from the heat consumer and is provided a continuous heating capacity of the heat pump transmission into the heat consumer, e.g. building heating system.
According to one preferred embodiment are both branches of the coolant return piping fitted with closing valves coupled with the control device.
From the point of control simplicity of the closing valves it is preferred if the control device of closing valves consists of a time control device.
To increase the utility value and efficiency particularly in season with no danger of frost creation on the heat exchangers air/coolant it is preferred, if each of the branches of the coolant return piping is fitted with a controllably closable bypass of its part forming a heating piping, which is according to one example embodiment formed that the first branch of the return piping is between the coolant return piping branching point and the first heating piping connected to the first auxiliary piping, which is to the first branch of the coolant return piping connected in front of the evaporation inlet of the second heat exchanger air/coolant, while the second branch of the return coolant piping is between the branching point of the coolant return piping and the second heating piping connected to the second auxiliary piping, which is to the second branch of the coolant return piping connected in front of the evaporating inlet of the first heat exchanger air/coolant and both auxiliary piping are fitted with a controllable valve connected to the control device.
Description of the drawing
The invention is schematically shown in the drawings in which Fig. 1 represents an arrangement of a heat pump without a controllably closable and openable bypass of its part forming a heating piping and Fig. 2 represents an arrangement of a heat pump with a controllably openable and closable bypass of its part forming a heating piping.
Specific description
A heat pump consists of a compressor 1 , whose suction is connected by a feed piping 2 with a coolant outlet 33 from a pair of heat exchangers 3 air/coolant.
Coolant in the outlet 33 from the heat exchangers 3 air/coolant transmits the heat taken off the air. The compressor 1 compresses this coolant, by means of which the coolant temperature further increased, usually to values around 85° C. Coolant is from the compressor 1 led into a heat exchanger 4 coolant/water. Water heated in this way is further used for a heat consumer, for instance for a building heating etc. From the heat exchanger 4 coolant/water comes out coolant cooled down to a residual temperature usually around 35° C to 40° C and is by means of a coolant return piping 5 led towards the heat exchangers 31, 32 air/coolant, while the return piping 5 is in front of the heat exchangers 31 , 32 air/coolant split in two branches 51, 52 .
The first branch 51 of the coolant return piping 5 is through the first controllable closable valve 91 led into the first heat exchanger 31 air/coolant. In the first heat exchanger 31 air/coolant the first branch 51 of the coolant return piping 5 forms the first heating piping 81 for defrosting this heat exchanger 31 air/coolant. From the first heat exchanger 31 air/coolant continues the first branch 51 into an evaporating inlet 320 of the second heat exchanger 32 air/coolant. In the second heat exchanger 32 air/coolant takes place a known coolant expansion coupled with a heat take-off from the air surrounding the second heat exchanger 32 air/coolant by means of coolant. Coolant with the heat gathered by this way is led though an outlet 33 into the coolant feed piping 2 towards the compressor 1 .
The second branch 52 of the coolant return piping 5 is through a second controllable closable valve 91 led into the second heat exchanger 32 . In the second heat exchanger 32 air/coolant forms the second branch 52 of the coolant return piping 5 the second heating piping 82 for defrosting this heat exchanger 32 air/coolant. From the second heat exchanger 32 air/coolant continues the second branch 52 into an evaporating inlet 310 of the first heat exchanger 32 air/coolant. In the first heat exchanger 32 air/coolant takes place a known coolant expansion coupled with a heat take-off from the air surrounding the first heat exchanger 32 air/coolant by means of coolant. Coolant with the heat gathered by this way is led though an outlet 33 into the coolant feed piping 2 towards the compressor 1 .
Closing valves 91, 92 are for the automation purposes connected to appropriate control members, they can be for instance represented by electromagnetically operated valves connected to a competent control device.
An evaporating coolant inlet 310, 320 into the appropriate heat exchanger 31, 32 air/coolant consists of an appropriate evaporating jet 72, which provides coolant evaporation and its distribution into an appropriate heat exchanger 31, 32 air/coolant, where this coolant takes off heat from the air.
Heat exchangers 31, 32 air/coolant are fitted with a ventilator 30 connected to a drive for increasing the air circulation along heat transfer surfaces of the heat exchangers 31, 32 air/coolant.
In the embodiment shown in Fig. 2 is the first branch 51 of the coolant return piping 5 between the branching point of the coolant return piping 5 to branches 51, 52 and the first heating piping 81 connected through the first auxiliary piping 510 with the point between the end of the first heating piping 81 and the evaporating inlet 320 of the second heat exchanger 32 air/coolant. The first auxiliary piping 510 is fitted with a controllable valve 5100 . Equivalently is the second branch 52 of the coolant return piping 5 between the branching point of the coolant return piping 5 to branches 51, 52 and the second heating piping 81 connected through the second auxiliary piping 520 with the point between the end of the second heating piping 82 and the evaporating inlet 310 of the first heat exchanger 31 air/coolant. The second auxiliary piping 520 is fitted with a controllable valve 5200 . Controllable valves 5100, 5200 are coupled with the control device.
In the represented example on the Fig. 2 are the first and the second auxiliary piping 510, 520 onto the point between the branching point of the coolant return piping 5 to branches 51, 52 and the heating piping 81 , 82 connected in the coolant flow direction behind the controllable valves 91, 92. In a not represented example are the first and the second auxiliary piping 510, 520 onto the point between the branching point of the coolant return piping 5 to branches 51 , 52 and the heating piping 81, 82 connected in the coolant flow direction in front of the controllable valves 91, 92 .
The heat pump according to the invention operates for instance that the first closing valve 91 controlling the inlet of the coolant with a residual heat into the first branch 51 of the coolant return piping 5 is open and the second closing valve 92 controlling the inlet of the coolant with a residual heat into the second branch 52 of the coolant return piping 5 is closed. By means of that the coolant with a residual heat flows first into the first exchanger 31 air/coolant as a heating medium and provides melting the frost from this first heat exchanger 31 air/coolant. No sooner than now the coolant flows into the second heat exchanger 32 air/coolant, where it expands and takes off the heat from the air and with this heat flows towards the compressor 1 , by means of which is compressed (temperature of coolant increases) and led into the heat exchanger 4 coolant/water for the heat consumer, for instance for the building heating. In a certain moment, e.g. according to sensors information or simply after some defined time interval comes to closing the first 91 and to opening the second closing valve 92, by means of which is opened inlet for the coolant with a residual heat to influx the second branch 52 of the coolant return piping 5 and concurrently comes to closing the first branch 51 of the coolant return piping 5 . This way the coolant with a residual heat first flows into the second heat exchanger 32 air/coolant as a heating medium and provides melting the frost from this second heat exchanger 32 air/coolant, which served before for heat take-off from the air into the coolant. No sooner than now the coolant flows into the first heat exchanger 32 air/coolant, where it expands and takes off the heat from the air and heated by this heat flows towards the compressor 1 , by means of which is compressed (temperature of coolant increases) and led into the heat exchanger 4 coolant/water, for instance for the building heating.
Switching the closing valves 9 ( 91 , 92 ) controlling the coolant influx into particular branches 51, 52 of the coolant return piping 5 can be controlled for instance on a simple time principle, when for a defined time period, e.g. 30 minutes, coolant flows through the first branch 51, then comes to switching and for another defined time period, for instance also 30 minutes, coolant flows through the second branch 52 . The time span of operation of particular branches 51, 52 of the coolant return piping 5 can be also be controlled automatically, for instance according to actual humidity and temperature round heat exchangers 31, 32 air/coolant etc.
The pair of closing valves 91, 92 can be replaced for another appropriate control member, for instance a valve coupled with a control member controlling switching coolant between the branches 51, 52 etc.
In cases of no risk of frost formation on heat exchangers 31, 32 air/coolant and thus when there is no need to heat the heat exchangers 31, 32 air/coolant is coolant led through auxiliary piping 510, 520 other than heating piping 81, 82 from the branching point of the coolant return piping 5 to branches 51, 52 directly in front of the evaporating inlets 310, 320 of both heat exchangers 31, 32 air/coolant. By means of that it is possible to gain heat from both exchangers 31, 32, increase the performance factor of the heat pump and the utility value is increased.
List of reference marks
1
compressor
2
feed piping
3
heat exchanger air/coolant
30
propeller
31
first heat exchanger air/coolant
310
evaporating inlet of the first heat exchanger air/coolant
32
second heat exchanger air/coolant
320
evaporating inlet of the second heat exchanger air/coolant
33
coolant outlet from the heat exchanger air/coolant
4
heat exchanger coolant/water
5
coolant return piping
51
first branch of the coolant return piping
510
first auxiliary piping
5100
controllable valve
52
second branch of the coolant return piping
520
second auxiliary piping
5200
controllable valve
72
evaporating jet
81
first heating piping
82
second heating piping
91
first closing valve
92
second closing valve

Claims (5)

  1. A heat pump consisting of a pair of heat exchangers air/coolant connected to a coolant feed piping into a compressor further connected to a coolant return piping from a heat exchanger coolant/water, characterized by that the coolant return piping (5) from the heat exchanger (4) coolant/water is before entering the heat exchangers (31, 32) air/coolant split in two branches (51, 52), where each of them is connected to an evaporating inlet of one heat exchanger (31, 32) air/coolant, while each of the branches (51, 52) forms before entering one of the pair of heat exchangers (31, 32) air/coolant a heating piping (81, 82) of the second from the pair of heat exchangers (31, 32) air/coolant and each of the branches (51, 52) of the coolant return piping (5) is closable.
  2. A heat pump as claimed in Claim 1, characterized by that the branches (51, 52) of the coolant return piping (5) are fitted with closing valves (9) coupled with a control device.
  3. A heat pump as claimed in Claim 2, characterized by that the control device of closing valves (9) comprises a time control device.
  4. A heat pump as claimed in any of Claims 1 to 3, characterized by that each of the branches (51, 52) of the coolant return piping (5) is fitted with a controllable opening and closing by-pass of its part forming a heating piping (81, 82).
  5. A heat pump as claimed in Claim 4, characterized by that the first branch (51) of the return piping (5) is between the point of the coolant return piping (5) branching to branches (51, 52) and a first heating piping (81) connected to a first auxiliary piping (510), which is connected to the first branch (51) of the coolant return piping (5) in front of an evaporating inlet (320) of the second heat exchanger (32) air/coolant, while the second branch (52) of the coolant return piping (5) is between the point of the coolant return piping (5) branching to the branches (51, 52) and the second heating piping (82) connected to a second auxiliary piping (520), which is with the second branch (52) of the coolant return piping (5) connected in front of the evaporating inlet (310) of the first heat exchanger (31) air/coolant and both auxiliary piping (510, 520) are fitted with a controllable valve (5100, 5200) connected to the control device.
EP05466002A 2004-03-15 2005-03-11 A heat pump Not-in-force EP1577624B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CZ20040367 2004-03-15
CZ20040367A CZ296566B6 (en) 2004-03-15 2004-03-15 Heat pump
CZ20040459A CZ299573B6 (en) 2004-04-05 2004-04-05 Heat pump
CZ20040459 2004-04-05

Publications (3)

Publication Number Publication Date
EP1577624A2 true EP1577624A2 (en) 2005-09-21
EP1577624A3 EP1577624A3 (en) 2006-12-27
EP1577624B1 EP1577624B1 (en) 2009-05-27

Family

ID=34839281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05466002A Not-in-force EP1577624B1 (en) 2004-03-15 2005-03-11 A heat pump

Country Status (3)

Country Link
EP (1) EP1577624B1 (en)
AT (1) ATE432452T1 (en)
DE (1) DE602005014579D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2213964A1 (en) * 2009-01-28 2010-08-04 Hermann Gautsch Apparatus for warming a heat carrier in a heating system with a heat pump
EP2664868A3 (en) * 2012-05-15 2016-08-03 Stiebel Eltron GmbH & Co. KG Heat pump apparatus and evaporator for a heat pump device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1038536A (en) * 1964-05-15 1966-08-10 Lester K Quick Refrigeration system
GB2167543A (en) * 1984-11-26 1986-05-29 Sanden Corp Refrigerated display cabinet
JPS6365273A (en) * 1986-09-08 1988-03-23 三洋電機株式会社 Low-temperature showcase
JPS63223478A (en) * 1987-03-11 1988-09-16 中野冷機株式会社 Refrigerator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1038536A (en) * 1964-05-15 1966-08-10 Lester K Quick Refrigeration system
GB2167543A (en) * 1984-11-26 1986-05-29 Sanden Corp Refrigerated display cabinet
JPS6365273A (en) * 1986-09-08 1988-03-23 三洋電機株式会社 Low-temperature showcase
JPS63223478A (en) * 1987-03-11 1988-09-16 中野冷機株式会社 Refrigerator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2213964A1 (en) * 2009-01-28 2010-08-04 Hermann Gautsch Apparatus for warming a heat carrier in a heating system with a heat pump
EP2664868A3 (en) * 2012-05-15 2016-08-03 Stiebel Eltron GmbH & Co. KG Heat pump apparatus and evaporator for a heat pump device

Also Published As

Publication number Publication date
DE602005014579D1 (en) 2009-07-09
ATE432452T1 (en) 2009-06-15
EP1577624A3 (en) 2006-12-27
EP1577624B1 (en) 2009-05-27

Similar Documents

Publication Publication Date Title
CN103890503B (en) Refrigerant charge management in Teat pump boiler
CN101382366B (en) Air conditioner
CN104848484B (en) The control method and air conditioner of air conditioner
CN101403555B (en) Low temperature type temperature-adjustment dehumidifier defrosting by using heat pump
CN104813122A (en) Method and apparatus for defrosting of an evaporator in connection with an air handling unit
CN105579794A (en) Air conditioner
CN105910360B (en) Air-conditioning system and its condensation prevention control method
JP2007278536A (en) Air conditioner
US6318095B1 (en) Method and system for demand defrost control on reversible heat pumps
CN105091437A (en) Automatic defrosting system for air cooling refrigerator and control method of automatic defrosting system
JP6650618B2 (en) Air conditioner and control method of air conditioner
CN110030705A (en) The control method of multi-line system
CN101509718B (en) Air cooling refrigerator automatic defrosting system
EP1577624B1 (en) A heat pump
WO2006031002A1 (en) Continuously operating type showcase
EP3225941A1 (en) Heat pump system with rapid defrosting mode
JP6752738B2 (en) Open showcase
CN212720507U (en) Freeze-drying system
CN204880911U (en) White system of automation of forced air cooling refrigerator
AU2002313381B2 (en) System and Method for Defrost Termination Feedback
CN205481990U (en) Refrigerating plant and control circuit thereof
JP6631613B2 (en) Cooling device using air refrigerant cycle
US20140318166A1 (en) Moisture removal system
US20060272681A1 (en) Water coil blow down system
WO2015189010A1 (en) Refrigeration device having hot gas defrosting, and defrosting method

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

17P Request for examination filed

Effective date: 20070621

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 602005014579

Country of ref document: DE

Date of ref document: 20090709

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090927

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090827

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090927

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090907

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20091111

Year of fee payment: 6

REG Reference to a national code

Ref country code: SK

Ref legal event code: T3

Ref document number: E 6343

Country of ref document: SK

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090827

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100302

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20100226

Year of fee payment: 6

Ref country code: GB

Payment date: 20100216

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090828

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20101130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100331

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110311

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110311

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110311

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110311

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120316

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091128

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100311

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090527

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602005014579

Country of ref document: DE

Effective date: 20131001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131001

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SK

Payment date: 20180226

Year of fee payment: 14

REG Reference to a national code

Ref country code: SK

Ref legal event code: MM4A

Ref document number: E 6343

Country of ref document: SK

Effective date: 20190311

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190311