EP2236957B1 - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- EP2236957B1 EP2236957B1 EP10001735.9A EP10001735A EP2236957B1 EP 2236957 B1 EP2236957 B1 EP 2236957B1 EP 10001735 A EP10001735 A EP 10001735A EP 2236957 B1 EP2236957 B1 EP 2236957B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- low pressure
- heat exchanger
- port
- refrigerant
- pressure gas
- 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.)
- Active
Links
- 239000003507 refrigerant Substances 0.000 claims description 195
- 239000007788 liquid Substances 0.000 claims description 40
- 238000001816 cooling Methods 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 33
- 238000007710 freezing Methods 0.000 description 7
- 230000008014 freezing Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/005—Outdoor unit expansion 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/007—Compression machines, plants or systems with reversible cycle not otherwise provided for three pipes connecting the outdoor side to the indoor side with multiple indoor units
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
Definitions
- the present invention relates to a simultaneous cooling and heating multi-air conditioner including an outdoor and a plurality of indoors, in which by switching high or low pressure of a heat exchanger and a high or low pressure gas pipe, a certain indoor performs a cooling operation while the other indoors perform a heating operation.
- WO 2008/090773 A1 discloses an air conditioner with the features described in the preamble portions of patent claims 1 and 4, respectively.
- Switching of a condenser/evaporator of an outdoor heat exchanger of a simultaneous cooling and heating multi-air conditioner, and switching of high pressure/low pressure of a high or low pressure gas pipe do not sometimes match with each other since cooling and heating are simultaneously operated, and the condenser/evaporator and the high pressure/low pressure have to be separately switched respectively.
- switching is sometimes performed in such a way as with a three-way switching valve by using three portions of a less expensive four-way valve which is frequently used in freezing cycles, instead of a three-way valve and an electromagnetic valve.
- connection is made so that any one of (A) a compressor discharge side piping system and (B) a compressor intake side piping system is connected to (C) an outdoor heat exchanger or a high or low pressure gas pipe, and (D) one remaining dead port is completely sealed in an unused state.
- the dead port is connected to the compressor intake piping via a capillary tube, and thereby, accumulation of the refrigerant is prevented.
- JP-2005-337659 A can be cited.
- WO 2008/090773 A1 discloses an air conditioner comprising: an indoor including an indoor heat exchanger, an outdoor including an outdoor heat exchanger and a compressor for compressing a refrigerant, a liquid pipe through which the refrigerant liquefied by one of the outdoor heat exchanger and the indoor heat exchanger is enabled to flow from the one of the outdoor heat exchanger and the indoor heat exchanger to the other one of the outdoor heat exchanger and the indoor heat exchanger, and a high or low pressure gas pipe through which the refrigerant is enabled to flow between the compressor and the indoor heat exchanger while being prevented from passing through the outdoor heat exchanger.
- an object of the present invention is to provide an air conditioner which prevents performance reduction by preventing bypass loss of a refrigerant in a cooling operation, a heating operation and an operation of mainly carrying out heating, decreases bypass loss of a four-way valve when an outdoor heat exchanger is a condenser and a high or low pressure gas pipe is at a high pressure (at the time of an operation of mainly carrying out cooling), and enhances performance in all operation states.
- an air conditioner includes an indoor having an indoor heat exchanger and an outdoor having a compressor and an outdoor heat exchanger, the indoor and the outdoor being connected by a high or low pressure gas pipe and a liquid pipe for passing a refrigerant, the outdoor including a heat exchanger four-way valve which connects the outdoor heat exchanger to any one of a compressor discharge side and intake side, and a high or low pressure gas pipe four-way valve which connects the high or low pressure gas pipe to any one of a compressor discharge side and intake side, wherein the outdoor further includes a first capillary tube connecting a dead port of the high or low pressure gas pipe four-way valve and the heat exchanger, and a second capillary tube connecting a dead port of the heat exchanger four-way valve and the high or low pressure gas pipe.
- an air conditioner includes an indoor having an indoor heat exchanger and an outdoor having a compressor and an outdoor heat exchanger, the indoor and the outdoor being connected by a high or low pressure gas pipe and a liquid pipe for passing a refrigerant, the outdoor including a heat exchanger four-way valve which connects the outdoor heat exchanger to any one of a compressor discharge side and intake side, and a high or low pressure gas pipe four-way valve which connects the high or low pressure gas pipe to any one of a compressor discharge side and intake side, wherein the high or low pressure gas pipe four-way valve has a high or low pressure gas pipe port, a high pressure port, a low pressure port and a dead port, the dead port and the heat exchanger being connected by a first capillary tube, and the heat exchanger four-way valve has a heat exchanger port, a high pressure port, a low pressure port and a dead port, the dead port and the high or low pressure gas pipe being connected by a second capillary tube.
- the refrigerant flows to the outdoor heat exchanger via the first capillary tube from the dead port of the high or low pressure gas pipe four-way valve, and a return refrigerant from the indoor flows to the compressor intake side from the dead port of the heat exchanger four-way valve via the second capillary tube.
- the refrigerant flows to the high or low pressure gas pipe side via the second capillary tube from the dead port of the heat exchanger four-way valve, and the return refrigerant from the outdoor flows to the compressor intake side from the dead port of the high or low pressure gas pipe four-way valve via the first capillary tube.
- an air conditioner including an indoor having an indoor heat exchanger and an outdoor having a compressor and an outdoor heat exchanger, the indoor and the outdoor being connected by a high or low pressure gas pipe and a liquid pipe for passing a refrigerant, the outdoor including a heat exchanger four-way valve which connects the outdoor heat exchanger to any one of a compressor discharge side and intake side, and a high or low pressure gas pipe four-way valve which connects the high or low pressure gas pipe to any one of a compressor discharge side and intake side, wherein the high or low pressure gas pipe four-way valve has a high or low pressure gas pipe port, a high pressure port, a low pressure port and a dead port, the dead port and the heat exchanger being connected by a first bypass valve for passing the refrigerant in a heat exchanger direction, and the heat exchanger four-way valve has a heat exchanger port, a high pressure port, a low pressure port and a dead port, and the dead port and the high or low pressure gas pipe being connected by a
- the first bypass valve and second bypass valve are a first check-valve and a second check-valve respectively.
- the refrigerant flows to the outdoor heat exchanger via the first check-valve from the dead port of the high or low pressure gas pipe four-way valve.
- the refrigerant flows to the high or low pressure gas pipe via the second check-valve from the dead port of the heat exchanger four-way valve.
- the first bypass valve and second bypass valve are both constituted of opening and closing valves, in the case of four-way valve switch in which the dead port of at least one of the four-way valves is connected to the compressor discharge side, the dead port of the four-way valve of the switch is opened, and in the case of four-way valve switch in which the dead ports of both the four-way valves are both connected to the compressor intake side, the opening and closing valves are both closed.
- the present invention when a switching operation of a cooling operation, a heating operation, and a simultaneous heating/cooling operation in a simultaneous cooling and heating multi-air conditioner is performed by using a less expensive four-way valve, bypass loss of a refrigerant is prevented, and the performance can be enhanced. Further, the liquid refrigerant which enters from the port of the four-way valve can be prevented from being condensed and accumulating in the dead port.
- Fig. 1 is a schematic diagram of embodiment 1 of a freezing cycle of the simultaneous cooling and heating multi-air conditioner of the present invention.
- the air conditioner is constituted by connecting one outdoor 10a and three indoors 40a, 40b and 40c to a liquid pipe 30 for refrigerant, and a high or low pressure gas pipe 34 and a low pressure gas pipe 37 of a refrigerant in parallel respectively.
- the number of outdoors which are connected may be larger than one, and the number of indoors which are connected may be larger or smaller than three, or may be one.
- the inside of a casing of the outdoor 10a includes a compressor 11a which compresses and discharges a refrigerant, a check-valve 12a for passing the refrigerant discharged from the compressor 11a in a discharge direction, four-way valves 16a and 13a which switch a circulating direction of the refrigerant, an outdoor heat exchanger 14a which performs heat exchange between the refrigerant and external air, an outdoor fan 19a which blows the external air to the outdoor heat exchanger 14a, and an outdoor expansion valve 15a which functions as a throttling mechanism.
- the four-way valve 16a is called a heat exchanger four-way valve
- the four-way valve 13a is called a high or low pressure gas pipe four-way valve.
- a port connected to a high pressure side of a compressor discharge side piping 21a is called a high pressure port
- a port connected to a low pressure side of a compressor intake side piping 23a is called a low pressure port
- a port connected to a high or low pressure gas pipe is called a high or low pressure gas pipe port
- a port connected to a heat exchanger is called a heat exchanger port
- a remaining port is called a dead port.
- the high or low pressure gas pipe four-way valve 13a has the respective ports for the high or low pressure gas pipe, high pressure and low pressure, and the dead port
- the heat exchanger four-way valve 16a has the respective ports for the heat exchanger, the high pressure and the low pressure, and the dead port.
- the inside of the casing of the outdoor 10a further includes a bypass capillary tube (first capillary tube) 61a which is connected to between the dead port of the high or low pressure gas pipe four-way valve 13a and the outdoor heat exchanger 14a, and a bypass capillary tube (second capillary tube) 62a which is connected to between the dead port of the heat exchanger four-way valve 16a and the high or low pressure gas pipe (a gate valve 32a side).
- the other end of the outdoor expansion valve 15a is connected to the liquid pipe 30 via a liquid gate valve 31a.
- the low pressure side of the high or low pressure gas pipe four-way valve 13a is connected to the high or low pressure gas pipe 34 via the high or low pressure gate valve 32a.
- the compressor intake side piping 23a is connected to the low pressure gas pipe 37 via a low pressure gas gate valve 39a.
- the respective gate valves 31a, 32a and 39a are opened when the outdoor 10a is connected to the respective pipes 30, 34 and 37, and is kept open, for example, during an operation after that.
- the respective casings of the indoors 40a, 40b and 40c house indoor heat exchangers 41a, 41b and 41c which perform heat exchange between the refrigerant and indoor air, indoor expansion valves 42a, 42b, and 42c which are connected to between the liquid pipe 30 and the respective indoor heat exchangers, and cooling and heating switch units 50a, 50b and 50c.
- High pressure side opening and closing mechanisms 51a, 51b and 51c which are connected to between the high or low pressure gas pipe 34 and the respective indoor heat exchangers
- low pressure side opening and closing mechanisms 52a, 52b and 52c which are connected to between the low pressure gas pipe 37 and the respective indoor heat exchangers are housed in the cooling and heating switch units 50a, 50b and 50c.
- a control device (not illustrated) which performs switch control of the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a of the outdoor 10a, and switch control of the high pressure side opening and closing mechanisms 51a, 51b and 51c, and the low pressure side opening and closing mechanisms 52a, 52b and 52c in the indoors 40a, 40b and 40c based on an operation signal from the operation device operated by a man or a temperature sensor (both not illustrated).
- the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a are in a connected state shown by the solid line in Fig. 1 .
- the high or low pressure gas pipe four-way valve 13a the low pressure port and the high or low pressure gas pipe 34 are connected, and the high pressure port and the dead port are connected so that the high pressure port is connected to the outdoor heat exchanger 14a via the bypass capillary tube 61a.
- the outdoor heat exchanger 14a and the high pressure port are connected, and the low pressure port and the dead port are connected so that the low pressure port is connected to the high or low pressure gate valve 32a side via the bypass capillary tube 62a.
- the high pressure gas refrigerant compressed in the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the outdoor heat exchanger 14a via the bypass capillary tube 61a, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is also fed to the outdoor heat exchanger 14a.
- the main flow of the high pressure gas refrigerant passes through the four-way valve 16a, but the flow also occurs to the bypass capillary tube 61a.
- the high pressure gas refrigerant is not excessively condensed in the dead port of the high or low pressure gas pipe side four-way valve 13a, and the liquid refrigerant does not accumulate therein. Further, a bypass between high and low pressures is not formed by the bypass capillary tube 61a.
- the high pressure gas refrigerant fed to the outdoor heat exchanger 14a exchanges heat with outdoor air and condenses to be a high pressure refrigerant, passes through the liquid gate valve 31a and the liquid pipe 30, and is used for a cooling operation in the respective indoors 40a, 40b and 40c to be a low pressure gas refrigerant.
- a return refrigerant of low pressure gas flowing out of each of the indoors is diverted to the high or low pressure gas pipe 34 and the low pressure gas pipe 37 to return to the outdoor.
- a part of the low pressure gas refrigerant of the high or low pressure gas pipe 34 is fed to the dead port of the heat exchanger four-way valve 16a via the bypass capillary tube 62a, and the remainder is fed to the high or low pressure gas pipe four-way valve 13a.
- the low pressure gas refrigerants which are fed to the heat exchanger four-way valve 16a and the high or low pressure gas pipe four-way valve 13a merge in the piping 23a and are fed to the compressor.
- the low pressure gas refrigerant of the low pressure gas pipe 37 is also fed to the compressor and compressed again.
- the bypass capillary tube 62a of the heat exchanger four-way valve 16a is connected to the low pressure port via the dead port, and the refrigerant does not condense or does not accumulate in the four-way valve. Further, the bypass between high and low pressures is not formed by the bypass capillary tube 62a.
- the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the broken line in Fig. 1 .
- the high or low pressure gas pipe four-way valve 13a the high or low pressure gas pipe 34 and the high pressure port are connected, and the low pressure port and the dead port are connected so that the low pressure port is connected to the outdoor heat exchanger 14a via the bypass capillary tube 61a.
- the outdoor heat exchanger 14a and the low pressure port are connected, the high pressure port and the dead port are connected, and the high pressure port is connected to the high or low pressure gate valve 32a side via the bypass capillary tube 62a.
- the high pressure gas refrigerant compressed in the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or low pressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is similarly fed to the high or low pressure gas pipe 34 via the bypass capillary tube 62a.
- the main flow of the high pressure gas refrigerant passes through the four-way valve 13a, but the flow also occurs to the bypass capillary tube 62a.
- the high pressure gas refrigerant does not excessively condense in the dead port of the heat exchanger four-way valve 16a, and the liquid refrigerant does not accumulate therein. Further, the bypass between high and low pressures is not formed by the bypass capillary tube 62a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe 34 is used for a heating operation in each of the indoors 40a, 40b and 40c and condenses to be a high pressure liquid refrigerant.
- the high pressure liquid refrigerant passes through the liquid pipe 30, is restricted by the outdoor expansion valve 15a, and exchanges heat with the outdoor air in the outdoor heat exchanger 14a to be a return refrigerant of a low pressure gas.
- a part of the low pressure gas refrigerant is fed to the dead port of the high or low pressure gas pipe four-way valve 13a via the bypass capillary tube 61a, and the remainder is fed to the heat exchanger four-way valve 16a.
- the bypass capillary tube 61a of the heat exchanger four-way valve 13a is connected to the low pressure port via the dead port, and the refrigerant is not condensed or accumulated in the four-way valve. Further, a bypass between high and low pressures is not formed by the bypass capillary tube 61a.
- the high or low pressure gas pipe four-way valve 13a In the high or low pressure gas pipe four-way valve 13a, the high or low pressure gas pipe 34 and the high pressure port are connected, and in the heat exchanger four-way valve 16a, the outdoor heat exchanger 14a and the high pressure port are connected.
- the low pressure side of the high or low pressure gas four-way valve 13a is connected to the outdoor heat exchanger 14a and the high pressure port of the heat exchanger four-way valve 16a via the dead port and the bypass capillary tube 61a.
- the dead port of the heat exchanger four-way valve 16a is connected to the high or low pressure gas gate valve 32a side and the low pressure port via the bypass capillary tube 62a.
- the high pressure gas refrigerant compressed in the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or low pressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to the outdoor heat exchanger 14a.
- a part of the high pressure gas refrigerant which is fed to the outdoor heat exchanger 14a is fed to the compressor intake piping 23a via the bypass capillary tube 61a, the dead port of the high or low pressure gas pipe four-way valve 13a, and the low pressure port.
- a part of the high pressure gas refrigerant which is fed to the high or low pressure gas pipe 34 via the high or low pressure gas pipe four-way valve 13a is fed to the compressor intake piping 23a via the bypass capillary tube 62a, the dead port and the low pressure port of the heat exchanger four-way valve 16a.
- the flow of the refrigerant occurs in the bypass capillary tubes 61a and 62a, and therefore, the liquid refrigerant does not accumulate in the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a, but since the bypass between high and low pressures is formed by passing through both the bypass capillary tubes, the refrigerant circulation amount is decreased by the amount for the bypass to reduce performance.
- an exhaust heat recovery operation of the indoors is carried out in the simultaneous cooling and heating operation, a reserve capacity occurs to the outdoor capacity, and capability shortage does not occur.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe 34 is used for a heating operation in the indoor 40c to become a condensed high pressure liquid refrigerant. Further, the high pressure gas refrigerant which is fed to the outdoor heat exchanger 14a exchanges heat with outdoor air and condenses to become a high pressure liquid refrigerant, passes through the liquid gate valve 31a and the liquid pipe 30, merges with the liquid refrigerant which is condensed in the indoor 40c, is used for the cooling operation in the indoors 40a and 40b and becomes a low pressure gas refrigerant.
- the low pressure gas refrigerant which flows out of each of the indoors passes through the low pressure gas pipe 37, returns to the compressor and is compressed again.
- the bypass capillary tube is used for the dead port of the four-way valve, and therefore, the following effect is provided. More specifically, the bypass is such that the liquid refrigerant does not accumulate in the four-way valve, and therefore, a fine pipe can be used, which is far less expensive as compared with the other electromagnetic valves and the like. Further, the bypass capillary tube does not have the operating component as compared with the other valves and the like. Therefore, operation failure (tightened) does not occur, and is highly reliable.
- Fig. 2 is a schematic diagram of a freezing cycle of embodiment 2 of the present invention.
- This is an example in which the bypass capillary tubes 61a and 62a shown in Fig. 1 are changed to a first bypass check-valve (first bypass valve) 63a and a second bypass check-valve (second bypass valve) 64a.
- first bypass check-valve (first bypass valve) 63a is connected so that the refrigerant flows in the heat exchanger direction between the dead port of the high or low pressure gas pipe four-way valve 13a and the heat exchanger 14a.
- the second bypass check-valve (second bypass valve) 64a is connected so that the refrigerant flows in the high or low pressure gas pipe direction between the dead port of the heat exchanger four-way valve 16a and the high or low pressure gas pipe 34.
- the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the solid line in Fig. 2 .
- the high or low pressure gas pipe four-way valve 13a the high or low pressure gas pipe 34 is connected to the low pressure port, and in the heat exchanger four-way valve 16a, the outdoor heat exchanger 14a is connected to the high pressure port.
- the high pressure port of the high or low pressure gas pipe four-way valve 13a is connected to the outdoor heat exchanger 14a via the first bypass check-valve 63a, and the low pressure port of the heat exchanger four-way valve 16a is connected to the high or low pressure gate valve 32a side via the second bypass check-valve 64a.
- the high pressure gas refrigerant compressed in the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the outdoor heat exchanger 14a via the bypass check-valve 63a, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is also fed to the outdoor heat exchanger 14a.
- the flow of the refrigerant occurs by the bypass check-valve 63a.
- the high pressure gas refrigerant is not excessively condensed in the dead port of the high or low pressure gas pipe four-way valve 13a, and the liquid refrigerant does not accumulate therein. Further, a bypass between high and low pressures is not formed by the bypass check-valve 63a.
- a return refrigerant of low pressure gas which flows out of each of the indoors is diverted to the high or low pressure gas pipe 34 and the low pressure gas pipe 37 to return to the outdoor.
- the low pressure gas refrigerant of the high or low pressure gas pipe 34 is fed to the high or low pressure gas pipe four-way valve 13a.
- the low pressure gas refrigerant is not fed to the heat exchanger four-way valve 16a, since the bypass check-valve 64a of the dead port is in the opposite direction.
- the bypass check-valve 64a of the heat exchanger four-way valve 16a is connected to the low pressure gas refrigerant side.
- the refrigerant of the dead port does not accumulate in the four-way valve by being condensed, and further, the bypass check-valve 64a does not form a bypass between high and low pressures.
- the low pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the compressor, and the low pressure gas refrigerant of the low pressure gas pipe 37 is also fed to the compressor, which are compressed again.
- the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the broken line in Fig. 2 .
- connection is in the direction in which the high or low pressure gas pipe 34 is connected to the high pressure port
- heat exchanger four-way valve 16a connection is in the direction in which the outdoor heat exchanger 14a is connected to the low pressure port.
- the low pressure port of the high or low pressure gas pipe four-way valve 13a is connected to the outdoor heat exchanger 14a via the dead port and the bypass check-valve 63a, and the high pressure port of the heat exchanger four-way valve 16a is connected to the high or low pressure gate valve 32a side via the dead port and the bypass check-valve 64a.
- the high pressure gas refrigerant compressed in the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or low pressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is also fed to the high or low pressure gas pipe 34 via the bypass check-valve 64a.
- the flow of the refrigerant occurs by the bypass check-valve 64a. Therefore, the high pressure gas refrigerant is not excessively condensed in the dead port of the heat exchanger four-way valve 16a, and the liquid refrigerant does not accumulate therein. Further, a bypass between high and low pressures is not formed.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe 34 is used for a heating operation in each of the indoors 40a, 40b and 40c, and is condensed to be a high pressure liquid refrigerant. Subsequently, the high pressure liquid refrigerant passes through the liquid pipe 30, is restricted in the outdoor expansion valve 15a, exchanges heat with outdoor air in the outdoor heat exchanger 14a to become a low pressure gas refrigerant, and is fed to the heat exchanger four-way valve 16a. The low pressure gas refrigerant is not fed to the dead port of the high or low pressure gas pipe four-way valve 13a, since the bypass check-valve 63a is in the opposite direction.
- bypass check-valve 63a of the high or low pressure gas pipe four-way valve 13a is connected to the low pressure at the low pressure gas refrigerant side.
- the refrigerant does not condense in the dead port, or does not accumulate in the four-way valve, or a bypass between high and low pressures is not formed.
- the low pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to the compressor 11a, and is compressed again.
- the high or low pressure gas pipe four-way valve 13a is in the connected state shown by the broken line
- the heat exchanger four-way valve 16a is in the connected state shown by the solid line.
- connection is in the direction in which the high or low pressure gas pipe 34 is connected to the high pressure port
- connection is in the direction in which the outdoor heat exchanger 14a is connected to the high pressure port.
- the low pressure port of the high or low pressure gas pipe four-way valve 13a is connected to the outdoor heat exchanger 14a via the dead port and the bypass check-valve 63a.
- the low pressure port of the heat exchanger four-way valve 16a is connected to the high or low pressure gas gate valve 32a side via the dead port and the bypass check-valve 64a.
- the high pressure gas refrigerant compressed by the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or low pressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to the outdoor heat exchanger 14a.
- the pressure between the dead port of the high or low pressure gas pipe four-way valve 13a from the check-valve, and the pressure between the dead port of the heat exchanger four-way valve 16a and the check-valve are drawn to low pressure. Therefore, the refrigerant is prevented from being condensed and accumulating in the dead port of each of the four-way valves, or a bypass between high and low pressures is not formed.
- Fig. 3 is a schematic diagram of a freezing cycle of embodiment 3 of the present invention.
- Fig. 3 is an example in which the first bypass check-valve 63a and the second bypass check-valve 64a shown in Fig. 2 are changed to a first bypass opening and closing valve 65a and a second bypass opening and closing valve 66a respectively.
- the first bypass opening and closing valve (first bypass valve) 65a is opened and closed so that the refrigerant flows in the heat exchanger direction between the dead port of the high or low pressure gas pipe four-way valve 13a and the heat exchanger 14a
- the second bypass opening and closing valve (second bypass valve) 66a is opened and closed so that the refrigerant flows in the high or low pressure gas pipe direction between the dead port of the heat exchanger four-way valve 16a and the high or low pressure gas pipe 34.
- the opening and closing valve may be an electromagnetic valve or an expansion valve.
- the bypass opening and closing valve is characterized by being usually in an open state, and being brought into a closed state when the outdoor heat exchanger 14a is an evaporator, and when the high or low pressure gas pipe 34 is at low pressure (especially at the time of the operation of mainly carrying out cooling).
- the bypass between high and low pressures at the time of the operation of mainly carrying out cooling which occurs in Fig. 1 can be prevented.
- the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the solid line in Fig. 3 .
- connection is in the direction in which the high or low pressure gas pipe 34 is connected to the low pressure port
- heat exchanger four-way valve 16a connection is in the direction in which the outdoor heat exchanger 14a is connected to the high pressure port.
- the high pressure port of the high or low pressure gas pipe four-way valve 13a is connected to the outdoor heat exchanger 14a via the dead port and the bypass opening and closing valve 65a.
- the low pressure port of the heat exchanger four-way valve 16a is connected to the high or low pressure gate valve 32a side via the dead port and the bypass opening and closing valve 66a.
- the bypass opening and closing valve 65a is necessarily opened, but the bypass opening and closing valve 66a may be opened or closed.
- the high pressure gas refrigerant compressed in the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed in the direction of the outdoor heat exchanger 14a since the bypass opening and closing valve 65a is open, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is also fed to the outdoor heat exchanger 14a.
- the flow of the refrigerant occurs by the open state of the bypass opening and closing valve 65a.
- the high pressure gas refrigerant is not excessively condensed in the dead port of the high or low pressure gas pipe four-way valve 13a, and the liquid refrigerant does not accumulate therein. Further, a bypass between high and low pressures is not formed.
- a return refrigerant of low pressure gas which flows out of each of the indoors is diverted to the high or low pressure gas pipe 34 and the low pressure gas pipe 37 to return to the outdoor.
- the low pressure gas refrigerant of the high or low pressure gas pipe 34 is fed to the high or low pressure gas pipe four-way valve 13a.
- the bypass opening and closing valve 66a may be opened or closed to the heat exchanger four-way valve 16a, and therefore, the refrigerant may be fed or not fed.
- Piping (including the dead port) between the low pressure port of the heat exchanger four-way valve 16a and the bypass opening and closing valve 66a is connected to the low pressure gas refrigerant side. Therefore, the refrigerant is not condensed in the dead port, or does not accumulate in the four-way valve. Further, a bypass between high and low pressures is not formed.
- the low pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the compressor.
- the low pressure gas refrigerant of the low pressure gas pipe 37 is also fed to the compressor, and is compressed again.
- the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the broken line in Fig. 3 .
- connection is in the direction in which the high or low pressure gas pipe 34 is connected to the high pressure port
- heat exchanger four-way valve 16a connection is in the direction in which the outdoor heat exchanger 14a is connected to the low pressure port.
- the low pressure port of the high or low pressure gas pipe four-way valve 13a is connected to the outdoor heat exchanger 14a via the bypass opening and closing valve 65a.
- the high pressure port of the heat exchanger four-way valve 16a is connected to the high or low pressure gate valve side via the bypass opening and closing valve 66a.
- the bypass opening and closing valve 66a is necessarily opened, but the bypass opening and closing valve 65a may be opened or closed.
- the high pressure gas refrigerant compressed in the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or low pressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to the high or low pressure gas pipe 34 since the bypass opening and closing valve 66a is opened.
- the flow of the refrigerant occurs by the bypass opening and closing valve 66a. Therefore, the high pressure gas refrigerant is not excessively condensed in the dead port of the heat exchanger four-way valve 16a, and the liquid refrigerant does not accumulate therein. A bypass between high and low pressures is not formed.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe 34 is used for a heating operation in each of the indoors 40a, 40b and 40c, and is condensed to be a high pressure liquid refrigerant. Subsequently, the high pressure liquid refrigerant passes through the liquid pipe 30, is restricted in the outdoor expansion valve 15a, exchanges heat with outdoor air through the outdoor heat exchanger 14a to become a low pressure gas refrigerant, and is fed to the heat exchanger four-way valve 16a.
- the refrigerant may be fed or may not be fed to the high or low pressure gas pipe four-way valve 13a, since the bypass opening and closing valve 65a may be opened or closed.
- the dead port between the high or low pressure gas pipe four-way valve 13a and the bypass opening and closing valve 65a is connected to the low pressure gas refrigerant side.
- the refrigerant is not condensed in the dead port, or does not accumulate in the four-way valve. Further, a bypass between high and low pressures is not formed.
- the low pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to the compressor, and is compressed again.
- the high or low pressure gas pipe four-way valve 13a is in the connected state shown by the broken line
- the heat exchanger four-way valve 16a is in the connected state shown by the solid line.
- connection is in the direction in which the high or low pressure gas pipe 34 is connected to the high pressure port
- connection is in the direction in which the outdoor heat exchanger 14a is connected to the high pressure port.
- the low pressure side of the high or low pressure gas pipe four-way valve 13a is connected to the outdoor heat exchanger 14a via the bypass opening and closing valve 65a.
- the low pressure side of the heat exchanger four-way valve 16a is connected to the high or low pressure gas gate valve 32a side via the bypass opening and closing valve 66a.
- the bypass opening and closing valves 65a and 66a are both closed.
- the high pressure gas refrigerant compressed in the compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a.
- the high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or low pressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to the outdoor heat exchanger 14a.
- high pressure is exerted on the bypass opening and closing valve 65a, but since the bypass opening and closing valve 65a is closed, the refrigerant is not fed to the high or low pressure gas pipe four-way valve 13a and the compressor intake piping 23a.
- bypass opening and closing valve 66a high pressure is also exerted on the bypass opening and closing valve 66a, but since the bypass opening and closing valve 66a is closed, the refrigerant is not fed to the heat exchanger four-way valve 16a and the compressor intake piping 23a. Further, the pressure between the respective opening and closing valves and the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a via the respective dead ports are drawn to low pressure. Therefore, the refrigerant is not condensed to accumulate in the four-way valves. Further, a bypass between high and low pressures is not formed.
Description
- The present invention relates to a simultaneous cooling and heating multi-air conditioner including an outdoor and a plurality of indoors, in which by switching high or low pressure of a heat exchanger and a high or low pressure gas pipe, a certain indoor performs a cooling operation while the other indoors perform a heating operation.
WO 2008/090773 A1 discloses an air conditioner with the features described in the preamble portions of patent claims 1 and 4, respectively. - Switching of a condenser/evaporator of an outdoor heat exchanger of a simultaneous cooling and heating multi-air conditioner, and switching of high pressure/low pressure of a high or low pressure gas pipe do not sometimes match with each other since cooling and heating are simultaneously operated, and the condenser/evaporator and the high pressure/low pressure have to be separately switched respectively. At such a time, switching is sometimes performed in such a way as with a three-way switching valve by using three portions of a less expensive four-way valve which is frequently used in freezing cycles, instead of a three-way valve and an electromagnetic valve.
- More specifically, to the three ports out of the four ports of a four-way valve, connection is made so that any one of (A) a compressor discharge side piping system and (B) a compressor intake side piping system is connected to (C) an outdoor heat exchanger or a high or low pressure gas pipe, and (D) one remaining dead port is completely sealed in an unused state.
- However, if the remaining dead port is completely sealed in an unused state in a four-way valve, a refrigerant entering from the other ports is condensed and accumulates in the dead port, and the circulating refrigerant becomes insufficient. Therefore, the dead port is connected to the compressor intake piping via a capillary tube, and thereby, accumulation of the refrigerant is prevented. As an example of using a four-way valve and a capillary tube for an outdoor heat exchanger, for example,
JP-2005-337659 A - In
JP-2005-337659 A Fig. 1 at the time of a heating operation to be in the state in which (C) an outdoor heat exchanger 612 is connected to (B) an intake side piping system of a compressor 611, and (A) the compressor discharge side piping system and (D) a remaining port of the switching valve 613 are connected. However, in this connection state, a high pressure gas refrigerant at the compressor discharge side is bypassed to the intake side of the compressor 611 via the switching valve 613 and a capillary tube 637. Therefore, the refrigerant circulation amount to the indoor reduces, and the capability reduces. -
WO 2008/090773 A1 discloses an air conditioner comprising: an indoor including an indoor heat exchanger, an outdoor including an outdoor heat exchanger and a compressor for compressing a refrigerant, a liquid pipe through which the refrigerant liquefied by one of the outdoor heat exchanger and the indoor heat exchanger is enabled to flow from the one of the outdoor heat exchanger and the indoor heat exchanger to the other one of the outdoor heat exchanger and the indoor heat exchanger, and a high or low pressure gas pipe through which the refrigerant is enabled to flow between the compressor and the indoor heat exchanger while being prevented from passing through the outdoor heat exchanger. - In view of the disadvantage of the above described conventional art, an object of the present invention is to provide an air conditioner which prevents performance reduction by preventing bypass loss of a refrigerant in a cooling operation, a heating operation and an operation of mainly carrying out heating, decreases bypass loss of a four-way valve when an outdoor heat exchanger is a condenser and a high or low pressure gas pipe is at a high pressure (at the time of an operation of mainly carrying out cooling), and enhances performance in all operation states.
- In order to attain the above-described object, an air conditioner according to the present invention includes an indoor having an indoor heat exchanger and an outdoor having a compressor and an outdoor heat exchanger, the indoor and the outdoor being connected by a high or low pressure gas pipe and a liquid pipe for passing a refrigerant, the outdoor including a heat exchanger four-way valve which connects the outdoor heat exchanger to any one of a compressor discharge side and intake side, and a high or low pressure gas pipe four-way valve which connects the high or low pressure gas pipe to any one of a compressor discharge side and intake side, wherein the outdoor further includes a first capillary tube connecting a dead port of the high or low pressure gas pipe four-way valve and the heat exchanger, and a second capillary tube connecting a dead port of the heat exchanger four-way valve and the high or low pressure gas pipe.
- In order to attain the above described object, an air conditioner according to the present invention includes an indoor having an indoor heat exchanger and an outdoor having a compressor and an outdoor heat exchanger, the indoor and the outdoor being connected by a high or low pressure gas pipe and a liquid pipe for passing a refrigerant, the outdoor including a heat exchanger four-way valve which connects the outdoor heat exchanger to any one of a compressor discharge side and intake side, and a high or low pressure gas pipe four-way valve which connects the high or low pressure gas pipe to any one of a compressor discharge side and intake side, wherein the high or low pressure gas pipe four-way valve has a high or low pressure gas pipe port, a high pressure port, a low pressure port and a dead port, the dead port and the heat exchanger being connected by a first capillary tube, and the heat exchanger four-way valve has a heat exchanger port, a high pressure port, a low pressure port and a dead port, the dead port and the high or low pressure gas pipe being connected by a second capillary tube.
- Further, in the air conditioner, at a time of cooling operation, the refrigerant flows to the outdoor heat exchanger via the first capillary tube from the dead port of the high or low pressure gas pipe four-way valve, and a return refrigerant from the indoor flows to the compressor intake side from the dead port of the heat exchanger four-way valve via the second capillary tube.
- Further, in the air conditioner, at a time of a heating operation, the refrigerant flows to the high or low pressure gas pipe side via the second capillary tube from the dead port of the heat exchanger four-way valve, and the return refrigerant from the outdoor flows to the compressor intake side from the dead port of the high or low pressure gas pipe four-way valve via the first capillary tube.
- Further, an air conditioner according to the present invention including an indoor having an indoor heat exchanger and an outdoor having a compressor and an outdoor heat exchanger, the indoor and the outdoor being connected by a high or low pressure gas pipe and a liquid pipe for passing a refrigerant, the outdoor including a heat exchanger four-way valve which connects the outdoor heat exchanger to any one of a compressor discharge side and intake side, and a high or low pressure gas pipe four-way valve which connects the high or low pressure gas pipe to any one of a compressor discharge side and intake side, wherein the high or low pressure gas pipe four-way valve has a high or low pressure gas pipe port, a high pressure port, a low pressure port and a dead port, the dead port and the heat exchanger being connected by a first bypass valve for passing the refrigerant in a heat exchanger direction, and the heat exchanger four-way valve has a heat exchanger port, a high pressure port, a low pressure port and a dead port, and the dead port and the high or low pressure gas pipe being connected by a second bypass valve for passing the refrigerant in a high or low pressure gas pipe direction.
- Further, in the air conditioner, the first bypass valve and second bypass valve are a first check-valve and a second check-valve respectively.
- Further, in the air conditioner, at the time of a cooling operation, the refrigerant flows to the outdoor heat exchanger via the first check-valve from the dead port of the high or low pressure gas pipe four-way valve.
- Further, in the air conditioner, at the time of a heating operation, the refrigerant flows to the high or low pressure gas pipe via the second check-valve from the dead port of the heat exchanger four-way valve.
- Further, in the air conditioner, the first bypass valve and second bypass valve are both constituted of opening and closing valves, in the case of four-way valve switch in which the dead port of at least one of the four-way valves is connected to the compressor discharge side, the dead port of the four-way valve of the switch is opened, and in the case of four-way valve switch in which the dead ports of both the four-way valves are both connected to the compressor intake side, the opening and closing valves are both closed.
- According to the present invention, when a switching operation of a cooling operation, a heating operation, and a simultaneous heating/cooling operation in a simultaneous cooling and heating multi-air conditioner is performed by using a less expensive four-way valve, bypass loss of a refrigerant is prevented, and the performance can be enhanced. Further, the liquid refrigerant which enters from the port of the four-way valve can be prevented from being condensed and accumulating in the dead port.
-
-
Fig. 1 is a freezing cycle schematic diagram according to embodiment 1 of the present invention; -
Fig. 2 is a freezing cycle schematic diagram according to embodiment 2 of the present invention; and -
Fig. 3 is a freezing cycle schematic diagram according to embodiment 3 of the present invention. - Hereinafter, embodiments of a simultaneous cooling and heating multi-air conditioner of the present invention will be described with reference to the drawings.
-
Fig. 1 is a schematic diagram of embodiment 1 of a freezing cycle of the simultaneous cooling and heating multi-air conditioner of the present invention. The air conditioner is constituted by connecting one outdoor 10a and three indoors 40a, 40b and 40c to aliquid pipe 30 for refrigerant, and a high or lowpressure gas pipe 34 and a lowpressure gas pipe 37 of a refrigerant in parallel respectively. Here, the number of outdoors which are connected may be larger than one, and the number of indoors which are connected may be larger or smaller than three, or may be one. - As shown in the drawing, the inside of a casing of the outdoor 10a includes a
compressor 11a which compresses and discharges a refrigerant, a check-valve 12a for passing the refrigerant discharged from thecompressor 11a in a discharge direction, four-way valves outdoor heat exchanger 14a which performs heat exchange between the refrigerant and external air, anoutdoor fan 19a which blows the external air to theoutdoor heat exchanger 14a, and anoutdoor expansion valve 15a which functions as a throttling mechanism. Here, the four-way valve 16a is called a heat exchanger four-way valve, and the four-way valve 13a is called a high or low pressure gas pipe four-way valve. Of four ports of the four-way valves, a port connected to a high pressure side of a compressordischarge side piping 21a is called a high pressure port, a port connected to a low pressure side of a compressorintake side piping 23a is called a low pressure port, a port connected to a high or low pressure gas pipe is called a high or low pressure gas pipe port, a port connected to a heat exchanger is called a heat exchanger port, and a remaining port is called a dead port. - Accordingly, the high or low pressure gas pipe four-
way valve 13a has the respective ports for the high or low pressure gas pipe, high pressure and low pressure, and the dead port, whereas the heat exchanger four-way valve 16a has the respective ports for the heat exchanger, the high pressure and the low pressure, and the dead port. - The inside of the casing of the outdoor 10a further includes a bypass capillary tube (first capillary tube) 61a which is connected to between the dead port of the high or low pressure gas pipe four-
way valve 13a and theoutdoor heat exchanger 14a, and a bypass capillary tube (second capillary tube) 62a which is connected to between the dead port of the heat exchanger four-way valve 16a and the high or low pressure gas pipe (agate valve 32a side). The other end of theoutdoor expansion valve 15a is connected to theliquid pipe 30 via aliquid gate valve 31a. The low pressure side of the high or low pressure gas pipe four-way valve 13a is connected to the high or lowpressure gas pipe 34 via the high or lowpressure gate valve 32a. The compressorintake side piping 23a is connected to the lowpressure gas pipe 37 via a low pressuregas gate valve 39a. Therespective gate valves respective pipes - The respective casings of the indoors 40a, 40b and 40c house
indoor heat exchangers indoor expansion valves liquid pipe 30 and the respective indoor heat exchangers, and cooling andheating switch units closing mechanisms pressure gas pipe 34 and the respective indoor heat exchangers, and low pressure side opening andclosing mechanisms 52a, 52b and 52c which are connected to between the lowpressure gas pipe 37 and the respective indoor heat exchangers are housed in the cooling andheating switch units - In the air conditioner constituted as described above, a control device (not illustrated) is provided, which performs switch control of the high or low pressure gas pipe four-
way valve 13a and the heat exchanger four-way valve 16a of the outdoor 10a, and switch control of the high pressure side opening andclosing mechanisms closing mechanisms 52a, 52b and 52c in the indoors 40a, 40b and 40c based on an operation signal from the operation device operated by a man or a temperature sensor (both not illustrated). - Next, an operation at the time of a cooling operation of the outdoor 10a and the indoors 40a, 40b and 40c will be described. The high or low pressure gas pipe four-
way valve 13a and the heat exchanger four-way valve 16a are in a connected state shown by the solid line inFig. 1 . In the high or low pressure gas pipe four-way valve 13a, the low pressure port and the high or lowpressure gas pipe 34 are connected, and the high pressure port and the dead port are connected so that the high pressure port is connected to theoutdoor heat exchanger 14a via the bypasscapillary tube 61a. In the heat exchanger four-way valve 16a, theoutdoor heat exchanger 14a and the high pressure port are connected, and the low pressure port and the dead port are connected so that the low pressure port is connected to the high or lowpressure gate valve 32a side via the bypasscapillary tube 62a. - As the flow of the refrigerant, the high pressure gas refrigerant compressed in the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to theoutdoor heat exchanger 14a via the bypasscapillary tube 61a, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is also fed to theoutdoor heat exchanger 14a. The main flow of the high pressure gas refrigerant passes through the four-way valve 16a, but the flow also occurs to the bypasscapillary tube 61a. Therefore, the high pressure gas refrigerant is not excessively condensed in the dead port of the high or low pressure gas pipe side four-way valve 13a, and the liquid refrigerant does not accumulate therein. Further, a bypass between high and low pressures is not formed by the bypasscapillary tube 61a. - The high pressure gas refrigerant fed to the
outdoor heat exchanger 14a exchanges heat with outdoor air and condenses to be a high pressure refrigerant, passes through theliquid gate valve 31a and theliquid pipe 30, and is used for a cooling operation in the respective indoors 40a, 40b and 40c to be a low pressure gas refrigerant. A return refrigerant of low pressure gas flowing out of each of the indoors is diverted to the high or lowpressure gas pipe 34 and the lowpressure gas pipe 37 to return to the outdoor. A part of the low pressure gas refrigerant of the high or lowpressure gas pipe 34 is fed to the dead port of the heat exchanger four-way valve 16a via the bypasscapillary tube 62a, and the remainder is fed to the high or low pressure gas pipe four-way valve 13a. The low pressure gas refrigerants which are fed to the heat exchanger four-way valve 16a and the high or low pressure gas pipe four-way valve 13a merge in thepiping 23a and are fed to the compressor. The low pressure gas refrigerant of the lowpressure gas pipe 37 is also fed to the compressor and compressed again. The bypasscapillary tube 62a of the heat exchanger four-way valve 16a is connected to the low pressure port via the dead port, and the refrigerant does not condense or does not accumulate in the four-way valve. Further, the bypass between high and low pressures is not formed by the bypasscapillary tube 62a. - Next, an operation at the time of a heating operation of the outdoor 10a, and the indoors 40a, 40b and 40c will be described. Concerning the operation of mainly carrying out heating in which a cooling machine is partially included in the heating indoors, the flow of the refrigerant around the four-way valve is the same as that in the heating operation, and therefore, the description will be omitted.
- At the time of a heating operation, the high or low pressure gas pipe four-
way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the broken line inFig. 1 . In the high or low pressure gas pipe four-way valve 13a, the high or lowpressure gas pipe 34 and the high pressure port are connected, and the low pressure port and the dead port are connected so that the low pressure port is connected to theoutdoor heat exchanger 14a via thebypass capillary tube 61a. In the heat exchanger four-way valve 16a, theoutdoor heat exchanger 14a and the low pressure port are connected, the high pressure port and the dead port are connected, and the high pressure port is connected to the high or lowpressure gate valve 32a side via thebypass capillary tube 62a. - As the flow of the refrigerant, the high pressure gas refrigerant compressed in the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or lowpressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is similarly fed to the high or lowpressure gas pipe 34 via thebypass capillary tube 62a. The main flow of the high pressure gas refrigerant passes through the four-way valve 13a, but the flow also occurs to thebypass capillary tube 62a. Therefore, the high pressure gas refrigerant does not excessively condense in the dead port of the heat exchanger four-way valve 16a, and the liquid refrigerant does not accumulate therein. Further, the bypass between high and low pressures is not formed by thebypass capillary tube 62a. - The high pressure gas refrigerant which is fed to the high or low
pressure gas pipe 34 is used for a heating operation in each of theindoors liquid pipe 30, is restricted by theoutdoor expansion valve 15a, and exchanges heat with the outdoor air in theoutdoor heat exchanger 14a to be a return refrigerant of a low pressure gas. A part of the low pressure gas refrigerant is fed to the dead port of the high or low pressure gas pipe four-way valve 13a via thebypass capillary tube 61a, and the remainder is fed to the heat exchanger four-way valve 16a. The low pressure gas refrigerants which are fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a merge in thepiping 23a and are fed to the compressor to be compressed again. Thebypass capillary tube 61a of the heat exchanger four-way valve 13a is connected to the low pressure port via the dead port, and the refrigerant is not condensed or accumulated in the four-way valve. Further, a bypass between high and low pressures is not formed by thebypass capillary tube 61a. - Finally, the case of an operation of mainly carrying out cooling in which the outdoor 10a, and the
indoors Fig. 1 , the high or low pressure gas pipe four-way valve 13a is in the connected state shown by the broken line, and the heat exchanger four-way valve 16a is in the connected state shown by the solid line. - In the high or low pressure gas pipe four-
way valve 13a, the high or lowpressure gas pipe 34 and the high pressure port are connected, and in the heat exchanger four-way valve 16a, theoutdoor heat exchanger 14a and the high pressure port are connected. Here, the low pressure side of the high or low pressure gas four-way valve 13a is connected to theoutdoor heat exchanger 14a and the high pressure port of the heat exchanger four-way valve 16a via the dead port and thebypass capillary tube 61a. The dead port of the heat exchanger four-way valve 16a is connected to the high or low pressuregas gate valve 32a side and the low pressure port via thebypass capillary tube 62a. - As the flow of the refrigerant, the high pressure gas refrigerant compressed in the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or lowpressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to theoutdoor heat exchanger 14a. Here, a part of the high pressure gas refrigerant which is fed to theoutdoor heat exchanger 14a is fed to thecompressor intake piping 23a via thebypass capillary tube 61a, the dead port of the high or low pressure gas pipe four-way valve 13a, and the low pressure port. - Similarly, a part of the high pressure gas refrigerant which is fed to the high or low
pressure gas pipe 34 via the high or low pressure gas pipe four-way valve 13a is fed to thecompressor intake piping 23a via thebypass capillary tube 62a, the dead port and the low pressure port of the heat exchanger four-way valve 16a. The flow of the refrigerant occurs in thebypass capillary tubes way valve 13a and the heat exchanger four-way valve 16a, but since the bypass between high and low pressures is formed by passing through both the bypass capillary tubes, the refrigerant circulation amount is decreased by the amount for the bypass to reduce performance. However, since an exhaust heat recovery operation of the indoors is carried out in the simultaneous cooling and heating operation, a reserve capacity occurs to the outdoor capacity, and capability shortage does not occur. - The high pressure gas refrigerant which is fed to the high or low
pressure gas pipe 34 is used for a heating operation in the indoor 40c to become a condensed high pressure liquid refrigerant. Further, the high pressure gas refrigerant which is fed to theoutdoor heat exchanger 14a exchanges heat with outdoor air and condenses to become a high pressure liquid refrigerant, passes through theliquid gate valve 31a and theliquid pipe 30, merges with the liquid refrigerant which is condensed in the indoor 40c, is used for the cooling operation in theindoors pressure gas pipe 37, returns to the compressor and is compressed again. - In the present embodiment, the bypass capillary tube is used for the dead port of the four-way valve, and therefore, the following effect is provided. More specifically, the bypass is such that the liquid refrigerant does not accumulate in the four-way valve, and therefore, a fine pipe can be used, which is far less expensive as compared with the other electromagnetic valves and the like. Further, the bypass capillary tube does not have the operating component as compared with the other valves and the like. Therefore, operation failure (tightened) does not occur, and is highly reliable.
-
Fig. 2 is a schematic diagram of a freezing cycle of embodiment 2 of the present invention. This is an example in which thebypass capillary tubes Fig. 1 are changed to a first bypass check-valve (first bypass valve) 63a and a second bypass check-valve (second bypass valve) 64a. Here, the first bypass check-valve (first bypass valve) 63a is connected so that the refrigerant flows in the heat exchanger direction between the dead port of the high or low pressure gas pipe four-way valve 13a and theheat exchanger 14a. The second bypass check-valve (second bypass valve) 64a is connected so that the refrigerant flows in the high or low pressure gas pipe direction between the dead port of the heat exchanger four-way valve 16a and the high or lowpressure gas pipe 34. - First, the case of a cooling operation of the outdoor 10a, and the
indoors way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the solid line inFig. 2 . In the high or low pressure gas pipe four-way valve 13a, the high or lowpressure gas pipe 34 is connected to the low pressure port, and in the heat exchanger four-way valve 16a, theoutdoor heat exchanger 14a is connected to the high pressure port. The high pressure port of the high or low pressure gas pipe four-way valve 13a is connected to theoutdoor heat exchanger 14a via the first bypass check-valve 63a, and the low pressure port of the heat exchanger four-way valve 16a is connected to the high or lowpressure gate valve 32a side via the second bypass check-valve 64a. - As the flow of the refrigerant, the high pressure gas refrigerant compressed in the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to theoutdoor heat exchanger 14a via the bypass check-valve 63a, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is also fed to theoutdoor heat exchanger 14a. The flow of the refrigerant occurs by the bypass check-valve 63a. Therefore, the high pressure gas refrigerant is not excessively condensed in the dead port of the high or low pressure gas pipe four-way valve 13a, and the liquid refrigerant does not accumulate therein. Further, a bypass between high and low pressures is not formed by the bypass check-valve 63a. - The high pressure gas refrigerant which is fed to the
outdoor heat exchanger 14a exchanges heat with outdoor air and condenses to be a high pressure liquid refrigerant, passes through theliquid gate valve 31a and theliquid pipe 30, and is used for a cooling operation in theindoors pressure gas pipe 34 and the lowpressure gas pipe 37 to return to the outdoor. The low pressure gas refrigerant of the high or lowpressure gas pipe 34 is fed to the high or low pressure gas pipe four-way valve 13a. The low pressure gas refrigerant is not fed to the heat exchanger four-way valve 16a, since the bypass check-valve 64a of the dead port is in the opposite direction. However, the bypass check-valve 64a of the heat exchanger four-way valve 16a is connected to the low pressure gas refrigerant side. Thus, the refrigerant of the dead port does not accumulate in the four-way valve by being condensed, and further, the bypass check-valve 64a does not form a bypass between high and low pressures. The low pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the compressor, and the low pressure gas refrigerant of the lowpressure gas pipe 37 is also fed to the compressor, which are compressed again. - Next, the case of a heating operation of the outdoor 10a and the
indoors way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the broken line inFig. 2 . In the high or low pressure gas pipe four-way valve 13a, connection is in the direction in which the high or lowpressure gas pipe 34 is connected to the high pressure port, and in the heat exchanger four-way valve 16a, connection is in the direction in which theoutdoor heat exchanger 14a is connected to the low pressure port. The low pressure port of the high or low pressure gas pipe four-way valve 13a is connected to theoutdoor heat exchanger 14a via the dead port and the bypass check-valve 63a, and the high pressure port of the heat exchanger four-way valve 16a is connected to the high or lowpressure gate valve 32a side via the dead port and the bypass check-valve 64a. - As the flow of the refrigerant, the high pressure gas refrigerant compressed in the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or lowpressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is also fed to the high or lowpressure gas pipe 34 via the bypass check-valve 64a. The flow of the refrigerant occurs by the bypass check-valve 64a. Therefore, the high pressure gas refrigerant is not excessively condensed in the dead port of the heat exchanger four-way valve 16a, and the liquid refrigerant does not accumulate therein. Further, a bypass between high and low pressures is not formed. - The high pressure gas refrigerant which is fed to the high or low
pressure gas pipe 34 is used for a heating operation in each of theindoors liquid pipe 30, is restricted in theoutdoor expansion valve 15a, exchanges heat with outdoor air in theoutdoor heat exchanger 14a to become a low pressure gas refrigerant, and is fed to the heat exchanger four-way valve 16a. The low pressure gas refrigerant is not fed to the dead port of the high or low pressure gas pipe four-way valve 13a, since the bypass check-valve 63a is in the opposite direction. However, the bypass check-valve 63a of the high or low pressure gas pipe four-way valve 13a is connected to the low pressure at the low pressure gas refrigerant side. Thus, the refrigerant does not condense in the dead port, or does not accumulate in the four-way valve, or a bypass between high and low pressures is not formed. The low pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to thecompressor 11a, and is compressed again. - Finally, the case of performing an operation of mainly carrying out cooling in which the outdoor 10a, and the
indoors Fig. 2 , the high or low pressure gas pipe four-way valve 13a is in the connected state shown by the broken line, and the heat exchanger four-way valve 16a is in the connected state shown by the solid line. In the high or low pressure gas pipe four-way valve 13a, connection is in the direction in which the high or lowpressure gas pipe 34 is connected to the high pressure port, and in the heat exchanger four-way valve 16a, connection is in the direction in which theoutdoor heat exchanger 14a is connected to the high pressure port. Here, the low pressure port of the high or low pressure gas pipe four-way valve 13a is connected to theoutdoor heat exchanger 14a via the dead port and the bypass check-valve 63a. The low pressure port of the heat exchanger four-way valve 16a is connected to the high or low pressuregas gate valve 32a side via the dead port and the bypass check-valve 64a. - As the flow of the refrigerant around the four-way valve, the high pressure gas refrigerant compressed by the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or lowpressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to theoutdoor heat exchanger 14a. - Here, high pressure is exerted on the bypass check-
valve 63a, but since the direction is opposite, the refrigerant is not fed to the high or low pressure gas pipe four-way valve 13a and thecompressor intake piping 23a. Similarly, high pressure is also exerted on the bypass check-valve 64a, but since the direction is opposite, the refrigerant is not fed to the heat exchanger four-way valve 16a and thecompressor intake piping 23a. Thereby, a bypass between high and low pressures at the time of the operation of mainly carrying out cooling, which occurs to the aforementioned embodiment 1 ofFig. 1 can be prevented. - Further, the pressure between the dead port of the high or low pressure gas pipe four-
way valve 13a from the check-valve, and the pressure between the dead port of the heat exchanger four-way valve 16a and the check-valve are drawn to low pressure. Therefore, the refrigerant is prevented from being condensed and accumulating in the dead port of each of the four-way valves, or a bypass between high and low pressures is not formed. -
Fig. 3 is a schematic diagram of a freezing cycle of embodiment 3 of the present invention.Fig. 3 is an example in which the first bypass check-valve 63a and the second bypass check-valve 64a shown inFig. 2 are changed to a first bypass opening and closingvalve 65a and a second bypass opening and closingvalve 66a respectively. - The first bypass opening and closing valve (first bypass valve) 65a is opened and closed so that the refrigerant flows in the heat exchanger direction between the dead port of the high or low pressure gas pipe four-
way valve 13a and theheat exchanger 14a, and the second bypass opening and closing valve (second bypass valve) 66a is opened and closed so that the refrigerant flows in the high or low pressure gas pipe direction between the dead port of the heat exchanger four-way valve 16a and the high or lowpressure gas pipe 34. The opening and closing valve may be an electromagnetic valve or an expansion valve. The bypass opening and closing valve is characterized by being usually in an open state, and being brought into a closed state when theoutdoor heat exchanger 14a is an evaporator, and when the high or lowpressure gas pipe 34 is at low pressure (especially at the time of the operation of mainly carrying out cooling). Thereby, as inFig. 2 of embodiment 2, the bypass between high and low pressures at the time of the operation of mainly carrying out cooling which occurs inFig. 1 can be prevented. - First, the case of the operation of carrying out cooling of the outdoor 10a, and the
indoors way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the solid line inFig. 3 . In the high or low pressure gas pipe four-way valve 13a, connection is in the direction in which the high or lowpressure gas pipe 34 is connected to the low pressure port, and in the heat exchanger four-way valve 16a, connection is in the direction in which theoutdoor heat exchanger 14a is connected to the high pressure port. Here, the high pressure port of the high or low pressure gas pipe four-way valve 13a is connected to theoutdoor heat exchanger 14a via the dead port and the bypass opening and closingvalve 65a. The low pressure port of the heat exchanger four-way valve 16a is connected to the high or lowpressure gate valve 32a side via the dead port and the bypass opening and closingvalve 66a. At this time, the bypass opening and closingvalve 65a is necessarily opened, but the bypass opening and closingvalve 66a may be opened or closed. - As the flow of the refrigerant, the high pressure gas refrigerant compressed in the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed in the direction of theoutdoor heat exchanger 14a since the bypass opening and closingvalve 65a is open, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is also fed to theoutdoor heat exchanger 14a. The flow of the refrigerant occurs by the open state of the bypass opening and closingvalve 65a. Therefore, the high pressure gas refrigerant is not excessively condensed in the dead port of the high or low pressure gas pipe four-way valve 13a, and the liquid refrigerant does not accumulate therein. Further, a bypass between high and low pressures is not formed. - The high pressure gas refrigerant which is fed to the
outdoor heat exchanger 14a exchanges heat with outdoor air and condenses to be a high pressure refrigerant, passes through theliquid gate valve 31a and theliquid pipe 30, and is used for a cooling operation in theindoors pressure gas pipe 34 and the lowpressure gas pipe 37 to return to the outdoor. The low pressure gas refrigerant of the high or lowpressure gas pipe 34 is fed to the high or low pressure gas pipe four-way valve 13a. The bypass opening and closingvalve 66a may be opened or closed to the heat exchanger four-way valve 16a, and therefore, the refrigerant may be fed or not fed. - Piping (including the dead port) between the low pressure port of the heat exchanger four-
way valve 16a and the bypass opening and closingvalve 66a is connected to the low pressure gas refrigerant side. Therefore, the refrigerant is not condensed in the dead port, or does not accumulate in the four-way valve. Further, a bypass between high and low pressures is not formed. The low pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the compressor. The low pressure gas refrigerant of the lowpressure gas pipe 37 is also fed to the compressor, and is compressed again. - Next, the case of a heating operation of the outdoor 10a and the
indoors way valve 13a and the heat exchanger four-way valve 16a are in the connected state shown by the broken line inFig. 3 . In the high or low pressure gas pipe four-way valve 13a, connection is in the direction in which the high or lowpressure gas pipe 34 is connected to the high pressure port, and in the heat exchanger four-way valve 16a, connection is in the direction in which theoutdoor heat exchanger 14a is connected to the low pressure port. Here, the low pressure port of the high or low pressure gas pipe four-way valve 13a is connected to theoutdoor heat exchanger 14a via the bypass opening and closingvalve 65a. The high pressure port of the heat exchanger four-way valve 16a is connected to the high or low pressure gate valve side via the bypass opening and closingvalve 66a. The bypass opening and closingvalve 66a is necessarily opened, but the bypass opening and closingvalve 65a may be opened or closed. - As the flow of the refrigerant, the high pressure gas refrigerant compressed in the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or lowpressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to the high or lowpressure gas pipe 34 since the bypass opening and closingvalve 66a is opened. The flow of the refrigerant occurs by the bypass opening and closingvalve 66a. Therefore, the high pressure gas refrigerant is not excessively condensed in the dead port of the heat exchanger four-way valve 16a, and the liquid refrigerant does not accumulate therein. A bypass between high and low pressures is not formed. - The high pressure gas refrigerant which is fed to the high or low
pressure gas pipe 34 is used for a heating operation in each of theindoors liquid pipe 30, is restricted in theoutdoor expansion valve 15a, exchanges heat with outdoor air through theoutdoor heat exchanger 14a to become a low pressure gas refrigerant, and is fed to the heat exchanger four-way valve 16a. The refrigerant may be fed or may not be fed to the high or low pressure gas pipe four-way valve 13a, since the bypass opening and closingvalve 65a may be opened or closed. The dead port between the high or low pressure gas pipe four-way valve 13a and the bypass opening and closingvalve 65a is connected to the low pressure gas refrigerant side. Thus, the refrigerant is not condensed in the dead port, or does not accumulate in the four-way valve. Further, a bypass between high and low pressures is not formed. The low pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to the compressor, and is compressed again. - Finally, the case of performing an operation of mainly carrying out cooling in which the outdoor 10a, and the
indoors Fig. 3 , the high or low pressure gas pipe four-way valve 13a is in the connected state shown by the broken line, and the heat exchanger four-way valve 16a is in the connected state shown by the solid line. In the high or low pressure gas pipe four-way valve 13a, connection is in the direction in which the high or lowpressure gas pipe 34 is connected to the high pressure port, and in the heat exchanger four-way valve 16a, connection is in the direction in which theoutdoor heat exchanger 14a is connected to the high pressure port. Here, the low pressure side of the high or low pressure gas pipe four-way valve 13a is connected to theoutdoor heat exchanger 14a via the bypass opening and closingvalve 65a. The low pressure side of the heat exchanger four-way valve 16a is connected to the high or low pressuregas gate valve 32a side via the bypass opening and closingvalve 66a. The bypass opening andclosing valves - As the flow of the refrigerant around the four-way valve, the high pressure gas refrigerant compressed in the
compressor 11a is fed to the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a. The high pressure gas refrigerant which is fed to the high or low pressure gas pipe four-way valve 13a is fed to the high or lowpressure gas pipe 34, and the high pressure gas refrigerant which is fed to the heat exchanger four-way valve 16a is fed to theoutdoor heat exchanger 14a. Here, high pressure is exerted on the bypass opening and closingvalve 65a, but since the bypass opening and closingvalve 65a is closed, the refrigerant is not fed to the high or low pressure gas pipe four-way valve 13a and thecompressor intake piping 23a. Similarly, high pressure is also exerted on the bypass opening and closingvalve 66a, but since the bypass opening and closingvalve 66a is closed, the refrigerant is not fed to the heat exchanger four-way valve 16a and thecompressor intake piping 23a. Further, the pressure between the respective opening and closing valves and the high or low pressure gas pipe four-way valve 13a and the heat exchanger four-way valve 16a via the respective dead ports are drawn to low pressure. Therefore, the refrigerant is not condensed to accumulate in the four-way valves. Further, a bypass between high and low pressures is not formed.
Claims (8)
- An air conditioner comprising: an indoor (40a, 40b, 40c) including an indoor heat exchanger (41a, 41b, 41c), an outdoor (10a) including an outdoor heat exchanger (14a) and a compressor (11a) for compressing a refrigerant, a liquid pipe (30) through which the refrigerant liquefied by one of the outdoor heat exchanger (14a) and the indoor heat exchanger (41a, 41b, 41c) is enabled to flow from the one of the outdoor heat exchanger (14a) and the indoor heat exchanger (41a, 41b, 41c) to the other one of the outdoor heat exchanger (14a) and the indoor heat exchanger (41a, 41b, 41c), and a high or low pressure gas pipe (34) through which the refrigerant is enabled to flow between the compressor (11a) and the indoor heat exchanger (41a, 41b, 41c) while being prevented from passing through the outdoor heat exchanger (14a),
characterized in that the outdoor (10a) further includes:a first four-way valve (16a) including a first high pressure port through which the compressed refrigerant is enabled to be taken from the compressor (11a) into the first four-way valve (16a), a first low pressure port through which the refrigerant is enabled to be taken from the first four-way valve (16a) into the compressor (11a), a heat exchanger port through which the refrigerant is enabled to flow between the outdoor heat exchanger (14a) and the compressor (11a), and a first dead port fluidly connected to the first high pressure port when the refrigerant flows from the heat exchanger port to the first low pressure port and fluidly connected to the first low pressure port when the refrigerant flows from the first high pressure port to the heat exchanger port,a second four-way valve (13a) including a second high pressure port through which the compressed refrigerant is enabled to be taken from the compressor (11a) into the second four-way valve (13a), a second low pressure port through which the refrigerant is enabled to be taken from the second four-way valve (13a) into the compressor (11a), a high or low pressure gas pipe port through which the refrigerant is enabled to flow between the high or low pressure gas pipe (34) and the compressor (11a), and a second dead port fluidly connected to the second high pressure port when the refrigerant flows from the high or low pressure gas pipe port to the second low pressure port and fluidly connected to the second low pressure port when the refrigerant flows from the second high pressure port to the high or low pressure gas pipe port,a first capillary tube (61a) allowing a fluidal flow between the second dead port and the refrigerant between the heat exchanger port and the outdoor heat exchanger (14a), anda second capillary tube (62a) allowing a fluidal flow between the first dead port and the high or low pressure gas pipe (34). - The air conditioner according to claim 1, wherein during a cooling operation of the air conditioner, the refrigerant flows from the second dead port to the outdoor heat exchanger (14a) through the first capillary tube (61a), and the refrigerant flows from the high or low pressure gas pipe (34) through the first capillary (62a) and the first dead port to be taken into the compressor (11a).
- The air conditioner according to claim 1 or 2, wherein during a heating operation of the air conditioner, the refrigerant flows from the first dead port through the second capillary tube (62a) into the high or low pressure gas pipe (34), and the refrigerant flows from the outdoor heat exchanger (14a) through the second dead port and the first capillary (61a) to be taken into the compressor (11a).
- An air conditioner comprising: an indoor (40a, 40b, 40c) including an indoor heat exchanger (41a, 41b, 41c), an outdoor (10a) including an outdoor heat exchanger (14a) and a compressor (11a) for compressing a refrigerant, a liquid pipe (30) through which the refrigerant liquefied by one of the outdoor heat exchanger (14a) and the indoor heat exchanger (41a, 41b, 41c) is enabled to flow from the one of the outdoor heat exchanger (14a) and the indoor heat exchanger (41a, 41b, 41c) to the other one of the outdoor heat exchanger (14a) and the indoor heat exchanger (41a, 41b, 41c), and a high or low pressure gas pipe (34) through which the refrigerant is enabled to flow between the compressor (11a) and the indoor heat exchanger (41a, 41b, 41c) while being prevented from passing through the outdoor heat exchanger (14a),
characterized in that the outdoor (10a) further includes:a first four-way valve (16a) including a first high pressure port through which the compressed refrigerant is enabled to be taken from the compressor (11a) into the first four-way valve (16a), a first low pressure port through which the refrigerant is enabled to be taken from the first four-way valve (16a) into the compressor (11a), a heat exchanger port through which the refrigerant is enabled to flow between the outdoor heat exchanger (14a) and the compressor (11a), and a first dead port fluidly connected to the first high pressure port when the refrigerant flows from the heat exchanger port to the first low pressure port and fluidly connected to the first low pressure port when the refrigerant flows from the first high pressure port to the heat exchanger port,a second four-way valve (13a) including a second high pressure port through which the compressed refrigerant is enabled to be taken from the compressor (11a) into the second four-way valve (13a), a second low pressure port through which the refrigerant is enabled to be taken from the second four-way valve (13a) into the compressor (11a), a high or low pressure gas pipe port through which the refrigerant is enabled to flow between the high or low pressure gas pipe (34) and the compressor (11a), and a second dead port fluidly connected to the second high pressure port when the refrigerant flows from the high or low pressure gas pipe port to the second low pressure port and fluidly connected to the second low pressure port when the refrigerant flows from the second high pressure port to the high or low pressure gas pipe port,a first bypass valve (63a) allowing a fluidal flow between the second dead port and the refrigerant between the heat exchanger port and the outdoor heat exchanger (14a), anda second bypass valve (64a) allowing a fluidal flow between the first dead port and the high or low pressure gas pipe (34). - The air conditioner according to claim 4, wherein the first bypass valve is a check valve (63a) allowing the refrigerant to flow from the second dead port to the outdoor heat exchanger (14a), and the second bypass valve is a check valve (64a) allowing the refrigerant to flow from the first dead port to the high or low pressure gas pipe (34).
- The air conditioner according to claim 4 or 5, wherein during a cooling operation of the air conditioner, the refrigerant flows from the second dead port to the outdoor heat exchanger (14a) through the first bypass valve (63a, 65a).
- The air conditioner according to any one of claims 4-6, wherein during a heating operation of the air conditioner, the refrigerant flows from the first dead port to the high or low pressure gas pipe (34) through the second bypass valve (64a, 66a).
- The air conditioner according to claim 4, wherein at least one of the first bypass valve (65a) and the second bypass valve (66a) is opened when the compressed refrigerant is supplied from the compressor (11a) to at least one of the first and second dead ports corresponding to the at least one of the first bypass valve (65a) and the second bypass valve (66a), and both of the first bypass valve (65a) and the second bypass valve (66a) are closed when the first and second dead ports fluidly communicate with the first and second low pressure ports respectively.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009086331A JP4751940B2 (en) | 2009-03-31 | 2009-03-31 | Air conditioner |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2236957A2 EP2236957A2 (en) | 2010-10-06 |
EP2236957A3 EP2236957A3 (en) | 2015-12-23 |
EP2236957B1 true EP2236957B1 (en) | 2018-07-11 |
Family
ID=42272551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10001735.9A Active EP2236957B1 (en) | 2009-03-31 | 2010-02-19 | Air conditioner |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2236957B1 (en) |
JP (1) | JP4751940B2 (en) |
CN (1) | CN101852508B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6029382B2 (en) * | 2012-08-27 | 2016-11-24 | 三菱重工業株式会社 | Air conditioner |
KR102146371B1 (en) * | 2013-09-25 | 2020-08-20 | 삼성전자주식회사 | Air Conditioner |
CN103759455B (en) | 2014-01-27 | 2015-08-19 | 青岛海信日立空调系统有限公司 | Reclamation frequency conversion thermal multiple heat pump and control method thereof |
JP6539560B2 (en) * | 2015-10-13 | 2019-07-03 | 三菱重工サーマルシステムズ株式会社 | Air conditioner |
CN106369891B (en) * | 2016-11-03 | 2018-10-19 | 珠海格力电器股份有限公司 | Air-conditioner set and its control method |
JP7002227B2 (en) * | 2017-06-14 | 2022-01-20 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
CN112833514B (en) * | 2019-11-22 | 2022-10-28 | 青岛海尔空调电子有限公司 | Air supplementing and enthalpy increasing control method for air conditioning system and air conditioning system |
CN113375376A (en) * | 2020-03-10 | 2021-09-10 | 开利公司 | Integrated heat pump system and control method thereof |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0424364Y2 (en) * | 1986-04-24 | 1992-06-09 | ||
JPH0711366B2 (en) * | 1987-11-18 | 1995-02-08 | 三菱電機株式会社 | Air conditioner |
JPH0769089B2 (en) * | 1987-12-18 | 1995-07-26 | ダイキン工業株式会社 | Heat storage type air conditioner |
JPH0749900B2 (en) * | 1988-08-31 | 1995-05-31 | ダイキン工業株式会社 | Heat recovery type air conditioner |
JP3296608B2 (en) * | 1992-10-27 | 2002-07-02 | 三洋電機株式会社 | Air conditioner |
US6244057B1 (en) * | 1998-09-08 | 2001-06-12 | Hitachi, Ltd. | Air conditioner |
JP2001253227A (en) * | 2000-03-14 | 2001-09-18 | Zexel Valeo Climate Control Corp | Air conditioner for vehicle |
JP2005337659A (en) | 2004-05-31 | 2005-12-08 | Daikin Ind Ltd | Air conditioner |
CN100460775C (en) * | 2004-11-04 | 2009-02-11 | 陈则韶 | Air source heat pump water heater with flow guide sleeve heat exchanger water storage tank |
CN2879057Y (en) * | 2006-03-04 | 2007-03-14 | 王俊 | Steam compression hot pump circulation device for heat transferring between three mediums |
JP4909093B2 (en) * | 2007-01-11 | 2012-04-04 | 日立アプライアンス株式会社 | Multi-type air conditioner |
JP5125116B2 (en) * | 2007-01-26 | 2013-01-23 | ダイキン工業株式会社 | Refrigeration equipment |
KR100791930B1 (en) * | 2007-04-06 | 2008-01-04 | 삼성전자주식회사 | Outdoor unit for multi-type air conditioner |
-
2009
- 2009-03-31 JP JP2009086331A patent/JP4751940B2/en active Active
-
2010
- 2010-02-09 CN CN2010101159924A patent/CN101852508B/en active Active
- 2010-02-19 EP EP10001735.9A patent/EP2236957B1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP2236957A2 (en) | 2010-10-06 |
JP4751940B2 (en) | 2011-08-17 |
EP2236957A3 (en) | 2015-12-23 |
CN101852508B (en) | 2013-06-05 |
CN101852508A (en) | 2010-10-06 |
JP2010236811A (en) | 2010-10-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2236957B1 (en) | Air conditioner | |
EP2078905B1 (en) | Heat source unit for refrigerating apparatus, and refrigerating apparatus | |
US8307668B2 (en) | Air conditioner | |
US20060162353A1 (en) | Multi-type air conditioner for simultaneous heating and cooling use and method for withdrawing refrigerant therefrom | |
EP2295896B1 (en) | Air conditioner | |
EP1643196B1 (en) | Air conditioner | |
WO2006013769A1 (en) | Air conditioner | |
EP3159630B1 (en) | Air conditioner | |
EP2354723A2 (en) | Refrigerant system | |
WO2008059922A1 (en) | Multi-type air conditioner | |
KR100499506B1 (en) | Multi type air conditioner | |
JP2008170063A (en) | Multiple type air conditioner | |
EP2314954B1 (en) | Refrigeration device | |
JP4578362B2 (en) | Engine driven heat pump | |
JP2010048506A (en) | Multi-air conditioner | |
EP3879204B1 (en) | Integrated heat pump system and control method therefor | |
KR101151529B1 (en) | Refrigerant system | |
CN113874662B (en) | air conditioner | |
KR101160351B1 (en) | Multi air conditioner and control method thereof | |
JP4341967B2 (en) | Multi-type air conditioner | |
JP4700025B2 (en) | Air conditioner | |
JP2007255876A (en) | Refrigerating device | |
KR20060098051A (en) | Distribution unit for multi type air conditioner of which indoor units are driven as a cooler or as a heater respectively at a same time | |
US20240068715A1 (en) | Heat pump system and control method thereof | |
JP2011052865A (en) | Air conditioner |
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 |
|
17P | Request for examination filed |
Effective date: 20100219 |
|
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 HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
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 HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F25B 13/00 20060101AFI20151119BHEP |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HITACHI APPLIANCES, INC. |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: JOHNSON CONTROLS-HITACHI AIR CONDITIONING TECHNOLO |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC. |
|
INTG | Intention to grant announced |
Effective date: 20180228 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
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 HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM 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: AT Ref legal event code: REF Ref document number: 1017289 Country of ref document: AT Kind code of ref document: T Effective date: 20180715 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602010051753 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20180711 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 1017289 Country of ref document: AT Kind code of ref document: T Effective date: 20180711 |
|
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: 20180711 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NO 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: 20181011 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: 20181012 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: 20180711 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: 20180711 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: 20180711 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: 20180711 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: 20181111 Ref country code: AT 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: 20180711 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: 20181011 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
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: 20180711 Ref country code: LV 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: 20180711 Ref country code: HR 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: 20180711 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602010051753 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
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: 20180711 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: 20180711 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: 20180711 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: 20180711 |
|
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 |
|
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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180711 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: 20180711 Ref country code: SM 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: 20180711 |
|
26N | No opposition filed |
Effective date: 20190412 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
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: 20180711 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC 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: 20180711 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190219 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20190228 |
|
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: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190228 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190228 |
|
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: 20190219 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20190228 |
|
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: 20180711 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
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: 20181111 Ref country code: MT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190219 |
|
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: 20180711 |
|
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; INVALID AB INITIO Effective date: 20100219 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20220119 Year of fee payment: 13 Ref country code: DE Payment date: 20220119 Year of fee payment: 13 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK 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: 20180711 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20230119 Year of fee payment: 14 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602010051753 Country of ref document: DE |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20230219 |
|
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: 20230219 |
|
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: 20230219 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230901 |