EP4325129A1 - Heat medium circulation device - Google Patents
Heat medium circulation device Download PDFInfo
- Publication number
- EP4325129A1 EP4325129A1 EP23190651.2A EP23190651A EP4325129A1 EP 4325129 A1 EP4325129 A1 EP 4325129A1 EP 23190651 A EP23190651 A EP 23190651A EP 4325129 A1 EP4325129 A1 EP 4325129A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat medium
- gas
- relief valve
- pressure relief
- liquid separation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 claims abstract description 184
- 239000003507 refrigerant Substances 0.000 claims abstract description 55
- 238000000926 separation method Methods 0.000 claims description 103
- 239000000463 material Substances 0.000 description 25
- 238000005192 partition Methods 0.000 description 10
- 238000007664 blowing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/08—Arrangements for drainage, venting or aerating
- F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
- F24D19/083—Venting arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/08—Arrangements for drainage, venting or aerating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/12—Preventing or detecting fluid leakage
-
- 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
- F25B2313/003—Indoor unit with water as a heat sink or heat source
Definitions
- the present invention relates to a heat medium circulation device for circulating heat medium through a use-side terminal by a heat medium circuit having a gas-liquid separating section.
- Patent document 1 discloses an air conditioner which has a separating section for separating refrigerant from heat medium flowing through a heat medium pipe, and which discharges the refrigerant separated by the separating section to outside of air-conditioning space.
- a heat medium circulation device described in claim 1 of the present invention including: a refrigerant circuit 10 to which a compressor 11, a use-side heat exchanger 12, an expansion device 13 and a heat source-side heat exchanger 14 are connected, and through which refrigerant circulates; a heat medium circuit 20 which circulates heat medium cooled or heated by the refrigerant discharged out from the compressor 11 in the use-side heat exchanger 12 through a use-side terminal 1; a gas-liquid separating section 30 for separating gas in the heat medium circuit 20 from the heat medium; and a pressure relief valve 40 for releasing the heat medium circuit 20 into atmosphere when pressure in the heat medium circuit 20 becomes equal to or higher than predetermined pressure; wherein the pressure relief valve 40 is connected to the gas-liquid separating section 30.
- the gas-liquid separating section 30 is placed in the heat medium circuit 20 located downstream of the use-side heat exchanger 12, the gas-liquid separating section 30 includes a gas-liquid separation inflow port 32 through which the heat medium flows into a cylindrical inner space 31, a gas-liquid separation outflow port 33 through which the heat medium flows out from the cylindrical inner space 31, and a pressure relief valve connection port 34 to which the pressure relief valve 40 is connected, and the pressure relief valve 40 and the pressure relief valve connection port 34 are connected to each other through a pressure relief valve connecting pipe 42.
- the gas-liquid separation inflow port 32 is provided in a bottom surface of the gas-liquid separating section 30, and the gas-liquid separation outflow port 33 and the pressure relief valve connection port 34 are provided in a side surface of the gas-liquid separating section 30, and the pressure relief valve connection port 34 is located at a position higher than the gas-liquid separation outflow port 33.
- the pressure relief valve 40 is located in a space above the use-side heat exchanger 12.
- the use-side heat exchanger 12 includes a heat medium first connection port 22x in a lower portion of a side surface of the use-side heat exchanger 12, and a heat medium second connection port 22y in an upper portion of the side surface of the use-side heat exchanger 12, the heat medium is introduced into the use-side heat exchanger 12 from the heat medium first connection port 22x, and the heat medium introduced into the use-side heat exchanger 12 is discharged out from the heat medium second connection port 22y, the heat medium second connection port 22y and the gas-liquid separation inflow port 32 are connected to each other through a gas-liquid separation inflow pipe 35, and the gas-liquid separation inflow port 32 is located at a position higher than the heat medium second connection port 22y.
- the gas-liquid separation inflow pipe 35 includes a gas-liquid separation lateral inflow pipe portion 35a connected to the heat medium second connection port 22y and a gas-liquid separation vertical inflow pipe portion 35b connected to the gas-liquid separation inflow port 32
- the pressure relief valve connecting pipe 42 includes a lateral connection pipe portion 42a connected to the pressure relief valve connection port 34, and a vertical connection pipe portion 42b connected to the pressure relief valve 40, and the lateral connection pipe portion 42a is placed above the gas-liquid separation lateral inflow pipe portion 35a.
- the lateral connection pipe portion 42a is placed in parallel to the gas-liquid separation lateral inflow pipe portion 35a.
- a space of a heat medium circuit can be saved by connecting a pressure relief valve to a gas-liquid separating section.
- a pressure relief valve is connected to a gas-liquid separating section. According to this embodiment, a space of a heat medium circuit can be saved by connecting the pressure relief valve to the gas-liquid separating section.
- the gas-liquid separating section includes a gas-liquid separation inflow port through which the heat medium flows into a cylindrical inner space, a gas-liquid separation outflow port through which the heat medium flows out from the cylindrical inner space, and a pressure relief valve connection port to which the pressure relief valve is connected, and the pressure relief valve and the pressure relief valve connection port are connected to each other through a pressure relief valve connecting pipe.
- the pressure relief valve can be connected to the gas-liquid separating section by connecting the pressure relief valve and the pressure relief valve connection port to each other through the pressure relief valve connecting pipe.
- the gas-liquid separation inflow port is provided in a bottom surface of the gas-liquid separating section, and the gas-liquid separation outflow port and the pressure relief valve connection port are provided in a side surface of the gas-liquid separating section, and the pressure relief valve connection port is located at a position higher than the gas-liquid separation outflow port.
- the pressure relief valve is located in a space above the use-side heat exchanger. According to this embodiment, the space above the use-side heat exchanger can effectively be utilized, and space of the heat medium circuit can be saved.
- the use-side heat exchanger in the heat medium circulation device of the second embodiment, includes a heat medium first connection port in a lower portion of a side surface of the use-side heat exchanger, and a heat medium second connection port in an upper portion of the side surface of the use-side heat exchanger, the heat medium is introduced into the use-side heat exchanger from the heat medium first connection port, and the heat medium introduced into the use-side heat exchanger is discharged out from the heat medium second connection port, the heat medium second connection port and the gas-liquid separation inflow port are connected to each other through a gas-liquid separation inflow pipe, and the gas-liquid separation inflow port is located at a position higher than the heat medium second connection port.
- the gas-liquid separating section can be placed above the use-side heat exchanger, and space of the heat medium circuit can be saved.
- the gas-liquid separation inflow pipe includes a gas-liquid separation lateral inflow pipe portion connected to the heat medium second connection port and a gas-liquid separation vertical inflow pipe portion connected to the gas-liquid separation inflow port
- the pressure relief valve connecting pipe includes a lateral connection pipe portion connected to the pressure relief valve connection port, and a vertical connection pipe portion connected to the pressure relief valve, and the lateral connection pipe portion is placed above the gas-liquid separation lateral inflow pipe portion.
- the gas-liquid separating section and the pressure relief valve can be placed above the use-side heat exchanger, and space of the heat medium circuit can be saved.
- the lateral connection pipe portion is placed in parallel to the gas-liquid separation lateral inflow pipe portion.
- the use-side heat exchanger, the gas-liquid separating section and the pressure relief valve can be placed in the limited space.
- Fig. 1 is a diagram showing a configuration of a heat medium circulation device according to the embodiment.
- the heat medium circulation device of the embodiment includes a refrigerant circuit 10 and a heat medium circuit 20.
- the refrigerant circuit 10 is formed by connecting a compressor 11, a use-side heat exchanger 12, an expansion device 13 and a heat source-side heat exchanger 14 to one another through a refrigerant pipe, and refrigerant circulates through the refrigerant circuit 10.
- the heat medium circuit 20 circulates heat medium heated by the refrigerant discharged out from the compressor 11 in the use-side heat exchanger 12 through a use-side terminal 1.
- the heat medium circuit 20 includes a gas-liquid separating section 30 which separates gas in the heat medium circuit 20 from heat medium, and a transfer pump 21 for circulating the heat medium.
- the heat medium circuit 20 further includes a pressure relief valve 40.
- the pressure relief valve 40 is connected to the gas-liquid separating section 30.
- a discharge device 50 which discharges gas separated by the gas-liquid separating section 30 is connected to the gas-liquid separating section 30.
- the transfer pump 21 is placed in an indoor unit 2.
- the refrigerant circuit 10 includes a four-way valve 15 which switches flow of refrigerant.
- An air blower 16 is provided at a position opposed to the heat source-side heat exchanger 14.
- Propane which is combustible refrigerant is used as refrigerant.
- the combustible refrigerant it is possible to use any of R1234yf, R1234ze and R32 which are slightly flammable refrigerants.
- Water or antifreeze liquid is used as the heat medium.
- the gas-liquid separating section 30 and the pressure relief valve 40 are placed in the heat medium circuit 20 located downstream of the use-side heat exchanger 12.
- An outdoor unit 3 is divided into a heat medium chamber 3a (see Fig. 2 ), a machine chamber 3b and an air blowing chamber 3c.
- At least a portion of the use-side heat exchanger 12, the gas-liquid separating section 30, the pressure relief valve 40 and the discharge device 50 are placed in the heat medium chamber 3a.
- the compressor 11, the expansion device 13 and the four-way valve 15 are placed in the machine chamber 3b.
- the heat source-side heat exchanger 14 and the air blower 16 are placed in the air blowing chamber 3c.
- refrigerant compressed by the compressor 11 flows through the use-side heat exchanger 12, the expansion device 13 and the heat source-side heat exchanger 14 in this order.
- the refrigerant is decompressed by the expansion device 13, heat of the refrigerant is absorbed by the heat source-side heat exchanger 14, and the refrigerant is sucked into the compressor 11.
- the heat medium can be heated.
- refrigerant compressed by the compressor 11 flows through the heat source-side heat exchanger 14, the expansion device 13 and the use-side heat exchanger 12 in this order.
- the refrigerant is decompressed by the expansion device 13, heat of the refrigerant is absorbed by the use-side heat exchanger 12 and the refrigerant is sucked into the compressor 11.
- the heat medium can be cooled.
- the heat medium which is cooled or heated by the use-side heat exchanger 12 is transferred to the use-side terminal 1 by the transfer pump 21, and the heat medium whose heat is absorbed or radiated by the use-side terminal 1 is returned to the use-side heat exchanger 12.
- the gas-liquid separating section 30 is plated in the heat medium circuit 20 which is located downstream of the use-side heat exchanger 12. Therefore, it is possible to suppress a case where refrigerant which leaks into the heat medium circuit 20 is guided into the use-side terminal 1.
- the gas-liquid separating section 30 When the indoor unit 2 is located downstream of the use-side heat exchanger 12 and upstream of the use-side terminal 1, the gas-liquid separating section 30 should be placed upstream of the indoor unit 2, but it is preferable that the gas-liquid separating section 30 is placed in the outdoor unit 3 as in this embodiment.
- the gas-liquid separating section 30 can separate the leaked refrigerant and in addition, the gas-liquid separating section 30 can separate air existing in the heat medium circuit 20. Especially, when heat medium is charged into the heat medium circuit 20 at the time of installation of the heat medium circulation device, the gas-liquid separating section 30 is utilized for removing air from the heat medium circuit 20.
- the transfer pump 21 is placed in the indoor unit 2 in this embodiment, the transfer pump 21 may be placed in the outdoor unit 3.
- the transfer pump 21 is placed in the outdoor unit 3. It is preferable that the transfer pump 21 is placed in the heat medium chamber 3a.
- Fig. 2 is a perspective view showing essential portions of the outdoor unit of the heat medium circulation device.
- a wall surface material 60 is placed between a bottom surface material outer periphery 3d and a top surface material outer periphery 3e.
- the wall surface material 60 includes a first wall surface material 61 and a second wall surface material 62 which is adjacent to the first wall surface material 61.
- the heat medium chamber 3a and the machine chamber 3b are divided by a first partition plate 71.
- the first partition plate 71 is provided with an opening, and the heat medium chamber 3a and the machine chamber 3b keep air permeability.
- the machine chamber 3b and the air blowing chamber 3c are divided by a second partition plate 72, thereby dividing the outdoor unit 3 into the heat medium chamber 3a, the machine chamber 3b and the air blowing chamber 3c.
- the first partition plate 71 prevents heat medium which leaks out from the pressure relief valve 40 from scattering to the compressor 11 placed in the machine chamber 3b.
- One side 71x (see Figs. 3 ) of the first partition plate 71 abuts against the first wall surface material 61, and the other side 71y of the first partition plate 71 abuts against the second wall surface material 62.
- the heat medium chamber 3a is formed by a space which is surrounded by the first partition plate 71, the first wall surface material 61 and the second wall surface material 62.
- the heat medium chamber 3a is formed at a corner portion of the outdoor unit 3. According to this, even when heat medium leaks out, the heat medium chamber 3a can be formed at a position where the heat medium does not exert an influence on the compressor 11, the expansion device 13 and the heat source-side heat exchanger 14.
- the heat medium chamber 3a where the use-side heat exchanger 12 the gas-liquid separating section 30 and the pressure relief valve 40 are placed is separated from the machine chamber 3b and the air blowing chamber 3c, even if heat medium leaks out, the heat medium does not exert an influence on the compressor 11, the expansion device 13 and the heat source-side heat exchanger 14.
- An opening 80 is formed in the first wall surface material 61.
- Figs. 3 are side views showing essential portions of the outdoor unit.
- the first wall surface material 61 is provided with the opening 80 at a position corresponding to an operating lever 41 of the pressure relief valve 40.
- the opening 80 is provided at a position corresponding to the heat medium chamber 3a which is divided from the machine chamber 3b by the first partition plate 71.
- the opening 80 formed in the first wall surface material 61 is located in the heat medium chamber 3a, and the opening 80 does not open from the machine chamber 3b. Since the opening 80 does not open from the machine chamber 3b, even when heat medium leaks out, it is possible to prevent the heat medium from entering into the machine chamber 3b from the heat medium chamber 3a.
- the pressure relief valve 40 is placed at a position opposed to the opening 80.
- the pressure relief valve 40 releases heat medium to atmosphere so that the pressure in the heat medium circuit 20 does not become abnormal pressure which is equal to or higher than the predetermined pressure.
- the pressure relief valve 40 includes the operating lever 41. By manually operating the operating lever 41, heat medium can be released to atmosphere from the heat medium circuit 20.
- the operating lever 41 of the pressure relief valve 40 can be operated from the opening 80, and when heat medium is charged into the heat medium circuit 20 or when heat medium is discharged out from the heat medium circuit 20, the pressure relief valve 40 can be utilized.
- the opening 80 is closed by a lid.
- Upper and lower portions of the opening 80 includes fastening holes.
- the lid is mounted on the first wall surface material 61.
- Figs. 4 are diagrams showing a configuration of the gas-liquid separating section used in the embodiment, wherein Fig. 4(a) is a perspective view of a partially cut-away gas-liquid separating section, and Fig. 4(b) is a diagram showing a configuration of a gas-liquid separation inflow port and a gas-liquid separation outflow port of the gas-liquid separating section.
- the gas-liquid separating section 30 includes the gas-liquid separation inflow port 32 through which heat medium flows into a cylindrical inner space 31, the gas-liquid separation outflow port 33 through which heat medium flows out from the cylindrical inner space 31, and a pressure relief valve connection port 34 to which the pressure relief valve 40 is connected.
- the gas-liquid separation inflow port 32 is provided on a bottom surface of the gas-liquid separating section 30, and the gas-liquid separation outflow port 33 and the pressure relief valve connection port 34 are provided on a side surface of the gas-liquid separating section 30.
- the heat medium flows in from the gas-liquid separation inflow port 32 and flows out from the gas-liquid separation outflow port 33.
- the gas-liquid separation inflow port 32 is eccentric from a virtual axis 31x of the cylindrical inner space 31 at a position separated from the gas-liquid separation outflow port 33. Therefore, time during which heat medium stays in the cylindrical inner space 31 can be increased, and the high gas-liquid separation ratio can be expected.
- a bottle diameter 31R of the cylindrical inner space 31 is two times or more of an entrance diameter 32R of the gas-liquid separation inflow port 32. Therefore, it is possible to reduce the flow speed of heat medium which flows in from the gas-liquid separation inflow port 32, and the high gas-liquid separation ratio can be expected.
- An exit diameter 33R of the gas-liquid separation outflow port 33 is equal to or greater than the entrance diameter 32R. Therefore, the flow speed of the heat medium which flows out from the gas-liquid separation outflow port 33 can be made smaller than the flow speed of the heat medium which flows in from the gas-liquid separation inflow port 32, and the high gas-liquid separation ratio can be expected.
- the discharge device 50 is provided therein with a float 51, and gas separated by the gas-liquid separating section 30 moves to an upper portion of the float 51.
- the float 51 is located at an upper end of the discharge device 50.
- Fig. 5 is a side view showing the gas-liquid separating section and the pressure relief valve used in the embodiment.
- the gas-liquid separation outflow port 33 is located at a position of a height 33h which is equal to or smaller than a half of a bottle height 31h of the cylindrical inner space 31. It is further preferable that the height 33h of the gas-liquid separation outflow port 33 is equal to or smaller than 1/3 of the bottle height 31h of the cylindrical inner space 31. Therefore, since a space where gas stays can be formed at a height 34h which is higher than the height 33h of the gas-liquid separation outflow port 33 of the cylindrical inner space 31, the high gas-liquid separation ratio can be expected.
- the height 33h of the gas-liquid separation outflow port 33 is a height from a bottom surface of the cylindrical inner space 31 to a center of the exit diameter 33R of the gas-liquid separation outflow port 33.
- the pressure relief valve connection port 34 is located at the height 34h which is higher than the height 33h of the gas-liquid separation outflow port 33. Therefore, even when operation of the gas-liquid separating section 30 has a problem, it is possible to flow out the gas by the pressure relief valve 40, and safety can be enhanced.
- the pressure relief valve 40 and the pressure relief valve connection port 34 are connected to each other through a pressure relief valve connection pipe 42.
- the pressure relief valve connection pipe 42 includes a lateral connection pipe portion 42a connected to the pressure relief valve connection port 34, and a vertical connection pipe portion 42b connected to the pressure relief valve 40.
- the pressure relief valve 40 may be connected directly to the gas-liquid separating section 30 without through the pressure relief valve connection pipe 42.
- Gas introduced into the discharge device 50 is discharged out from a discharge port 52. If gas is discharged out from the discharge port 52, the float 51 (see Fig. 4(a) ) is located at the upper end of the discharge device 50, thereby closing the discharge port 52.
- Fig. 6 is a perspective view showing the heat medium chamber of the outdoor unit.
- a height 12h of the use-side heat exchanger 12 is greater than its width 12w and depth 12b.
- a lower portion of a side surface of the use-side heat exchanger 12 includes a heat medium first connection port 22x, and an upper portion of the side surface of the use-side heat exchanger 12 includes a heat medium second connection port 22y.
- the lower portion of the side surface of the use-side heat exchanger 12 includes a refrigerant first connection port 17x, and the upper portion of the side surface of the use-side heat exchanger 12 includes a refrigerant second connection port 17y.
- the heat medium is introduced into the use-side heat exchanger 12 from the heat medium first connection port 22x, and the heat medium introduced into the use-side heat exchanger 12 is discharged out from the heat medium second connection port 22y.
- refrigerant compressed by the compressor 11 is introduced into the use-side heat exchanger 12 from the refrigerant second connection port 17y, and the refrigerant introduced into the use-side heat exchanger 12 is discharged out from the refrigerant first connection port 17x.
- the heat medium second connection port 22y and the gas-liquid separation inflow port 32 are connected to each other through a gas-liquid separation inflow pipe 35.
- the gas-liquid separation inflow pipe 35 includes a gas-liquid separation lateral inflow pipe portion 35a connected to the heat medium second connection port 22y, and a gas-liquid separation vertical inflow pipe portion 35b connected to the gas-liquid separation inflow port 32.
- the gas-liquid separation inflow port 32 is located at a position higher than the heat medium second connection port 22y.
- the bottom surface of the gas-liquid separating section 30 is provided with the gas-liquid separation inflow port 32, and the gas-liquid separation inflow port 32 is located at the position higher than the heat medium second connection port 22y in this manner. According to this, the gas-liquid separating section 30 which is required to be placed at a high position among the heat medium circuit 20 is easily be placed, the gas-liquid separating section 30 can be plated above the use-side heat exchanger 12, and a space of the heat medium circuit 20 can be saved.
- the gas-liquid separating section 30 is placed at the position higher than the use-side heat exchanger 12 and the pressure relief valve 40 is placed on the side of the gas-liquid separating section 30. Especially according to this configuration, the gas-liquid separating section 30 and the pressure relief valve 40 are placed above the use-side heat exchanger 12, and a space of the heat medium chamber 3a can be saved.
- the gas-liquid separation inflow pipe 35 includes the gas-liquid separation lateral inflow pipe portion 35a and the gas-liquid separation vertical inflow pipe portion 35b, a flowing direction of heat medium discharged out from the use-side heat exchanger 12 is changed until the heat medium flows into the gas-liquid separating section 30. Therefore, the high gas-liquid separation ratio can be expected.
- the pressure relief valve 40 is located at the position higher than the use-side heat exchanger 12 and the pressure relief valve 40 is placed in the upper space of the use-side heat exchanger 12. Especially according to this configuration, the upper space of the use-side heat exchanger 12 can effectively be utilized, and the space of the heat medium circuit 20 can be saved.
- the lateral connection pipe portion 42a connected to the pressure relief valve connection port 34 is placed above the gas-liquid separation lateral inflow pipe portion 35a. According to this configuration, the gas-liquid separating section 30 and the pressure relief valve 40 can be placed above the use-side heat exchanger 12, and the space of the heat medium circuit 20 can be saved.
- the lateral connection pipe portion 42a is placed in parallel to the gas-liquid separation lateral inflow pipe portion 35a. Especially according to this configuration, the use-side heat exchanger 12, the gas-liquid separating section 30 and the pressure relief valve 40 can be placed in a limited spaced.
- An exit joint 36 is connected to the gas-liquid separation flow exit 33, and a heat medium first connection pipe 23 is connected to the heat medium first connection port 22x.
- An entrance joint 37 is connected to the heat medium first connection pipe 23.
- the exit joint 36 and the entrance joint 37 project outward from the second wall surface material 62 which is located in the heat medium chamber 3a.
- the heat medium chamber 3a is formed in a corner portion of the outdoor unit 3 utilizing the first wall surface material 61 and second wall surface material 62 which are adjacent to each other. Therefore, the exit joint 36 and the entrance joint 37 easily project from the outdoor unit 3.
- the embodiment supports the following configuration.
- a heat medium circulation device comprising: a refrigerant circuit to which a compressor, a use-side heat exchanger, an expansion device and a heat source-side heat exchanger are connected, and through which refrigerant circulates; a heat medium circuit which circulates heat medium cooled or heated by the refrigerant discharged out from the compressor in the use-side heat exchanger through a use-side terminal; a gas-liquid separating section for separating gas in the heat medium circuit from the heat medium; and a pressure relief valve for releasing the heat medium circuit into atmosphere when pressure in the heat medium circuit becomes equal to or higher than predetermined pressure; wherein the pressure relief valve is connected to the gas-liquid separating section.
- a space of a heat medium circuit can be saved by connecting the pressure relief valve to the gas-liquid separating section.
- the heat medium circulation device wherein the gas-liquid separating section is placed in the heat medium circuit located downstream of the use-side heat exchanger, the gas-liquid separating section includes a gas-liquid separation inflow port through which the heat medium flows into a cylindrical inner space, a gas-liquid separation outflow port through which the heat medium flows out from the cylindrical inner space, and a pressure relief valve connection port to which the pressure relief valve is connected, and the pressure relief valve and the pressure relief valve connection port are connected to each other through a pressure relief valve connecting pipe.
- the pressure relief valve can be connected to the gas-liquid separating section by connecting the pressure relief valve and the pressure relief valve connection port to each other through the pressure relief valve connecting pipe.
- the heat medium circulation device wherein the gas-liquid separation inflow port is provided in a bottom surface of the gas-liquid separating section, and the gas-liquid separation outflow port and the pressure relief valve connection port are provided in a side surface of the gas-liquid separating section, and the pressure relief valve connection port is located at a position higher than the gas-liquid separation outflow port.
- the heat medium circulation device according to any one of the configurations 1 to 3, wherein the pressure relief valve is located in a space above the use-side heat exchanger.
- the space above the use-side heat exchanger can effectively be utilized, and space of the heat medium circuit can be saved.
- the heat medium circulation device according to the configuration 2 or 3, wherein the use-side heat exchanger includes a heat medium first connection port in a lower portion of a side surface of the use-side heat exchanger, and a heat medium second connection port in an upper portion of the side surface of the use-side heat exchanger, the heat medium is introduced into the use-side heat exchanger from the heat medium first connection port, and the heat medium introduced into the use-side heat exchanger is discharged out from the heat medium second connection port, the heat medium second connection port and the gas-liquid separation inflow port are connected to each other through a gas-liquid separation inflow pipe, and the gas-liquid separation inflow port is located at a position higher than the heat medium second connection port.
- the gas-liquid separating section can be placed above the use-side heat exchanger, and space of the heat medium circuit can be saved.
- the gas-liquid separation inflow pipe includes a gas-liquid separation lateral inflow pipe portion connected to the heat medium second connection port and a gas-liquid separation vertical inflow pipe portion connected to the gas-liquid separation inflow port
- the pressure relief valve connecting pipe includes a lateral connection pipe portion connected to the pressure relief valve connection port, and a vertical connection pipe portion connected to the pressure relief valve, and the lateral connection pipe portion is placed above the gas-liquid separation lateral inflow pipe portion.
- the gas-liquid separating section and the pressure relief valve can be placed above the use-side heat exchanger, and space of the heat medium circuit can be saved.
- the heat medium circulation device according to the configuration 6, wherein the lateral connection pipe portion is placed in parallel to the gas-liquid separation lateral inflow pipe portion.
- the use-side heat exchanger, the gas-liquid separating section and the pressure relief valve can be placed in the limited space.
- the present invention is suitable especially for a heat medium circulation device using combustible refrigerant.
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- Other Air-Conditioning Systems (AREA)
Abstract
[Object] It is an object of the present invention to provide a heat medium circulation device capable of placing a gas-liquid separating section and a pressure relief valve in a limited space.[Solving means] A heat medium circulation device of the present invention including: a refrigerant circuit 10 to which a compressor 11, a use-side heat exchanger 12, an expansion device 13 and a heat source-side heat exchanger 14 are connected, and through which refrigerant circulates; a heat medium circuit 20 which circulates heat medium cooled or heated by the refrigerant discharged out from the compressor 11 in the use-side heat exchanger 12 through a use-side terminal 1; a gas-liquid separating section 30 for separating gas in the heat medium circuit 20 from the heat medium; and a pressure relief valve 40 for releasing the heat medium circuit 20 into atmosphere when pressure in the heat medium circuit 20 becomes equal to or higher than predetermined pressure; wherein the pressure relief valve 40 is connected to the gas-liquid separating section 30.
Description
- The present invention relates to a heat medium circulation device for circulating heat medium through a use-side terminal by a heat medium circuit having a gas-liquid separating section.
- Patent document 1 discloses an air conditioner which has a separating section for separating refrigerant from heat medium flowing through a heat medium pipe, and which discharges the refrigerant separated by the separating section to outside of air-conditioning space.
- According to the patent document 1, even if refrigerant flows into the heat medium circuit, since the refrigerant is discharged to outside of the air-conditioning space, it is possible to suppress the refrigerant from flowing into the heat medium pipe which is provided in a room.
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Japanese Translation of PCT international Application Publication No.2018/154628 - However, the patent document 1 does not assume that a gas-liquid separating section is placed in a limited space such as an outdoor machine.
- It is an object of the present invention to provide a heat medium circulation device capable of placing a gas-liquid separating section and a pressure relief valve in a limited space.
- A heat medium circulation device described in claim 1 of the present invention including: a
refrigerant circuit 10 to which acompressor 11, a use-side heat exchanger 12, anexpansion device 13 and a heat source-side heat exchanger 14 are connected, and through which refrigerant circulates; aheat medium circuit 20 which circulates heat medium cooled or heated by the refrigerant discharged out from thecompressor 11 in the use-side heat exchanger 12 through a use-side terminal 1; a gas-liquid separatingsection 30 for separating gas in theheat medium circuit 20 from the heat medium; and apressure relief valve 40 for releasing theheat medium circuit 20 into atmosphere when pressure in theheat medium circuit 20 becomes equal to or higher than predetermined pressure; wherein thepressure relief valve 40 is connected to the gas-liquid separating section 30. According toclaim 2 of the invention, in the heat medium circulation device described in claim 1, the gas-liquid separating section 30 is placed in theheat medium circuit 20 located downstream of the use-side heat exchanger 12, the gas-liquid separating section 30 includes a gas-liquidseparation inflow port 32 through which the heat medium flows into a cylindricalinner space 31, a gas-liquidseparation outflow port 33 through which the heat medium flows out from the cylindricalinner space 31, and a pressure reliefvalve connection port 34 to which thepressure relief valve 40 is connected, and thepressure relief valve 40 and the pressure reliefvalve connection port 34 are connected to each other through a pressure reliefvalve connecting pipe 42. - According to
claim 3 of the invention, in the heat medium circulation device described inclaim 2, the gas-liquidseparation inflow port 32 is provided in a bottom surface of the gas-liquid separating section 30, and the gas-liquidseparation outflow port 33 and the pressure reliefvalve connection port 34 are provided in a side surface of the gas-liquid separating section 30, and the pressure reliefvalve connection port 34 is located at a position higher than the gas-liquidseparation outflow port 33. - According to claim 4 of the invention, in the heat medium circulation device described in claim 1, the
pressure relief valve 40 is located in a space above the use-side heat exchanger 12. - According to claim 5 of the invention, in the heat medium circulation device described in
claim 2, the use-side heat exchanger 12 includes a heat mediumfirst connection port 22x in a lower portion of a side surface of the use-side heat exchanger 12, and a heat mediumsecond connection port 22y in an upper portion of the side surface of the use-side heat exchanger 12, the heat medium is introduced into the use-side heat exchanger 12 from the heat mediumfirst connection port 22x, and the heat medium introduced into the use-side heat exchanger 12 is discharged out from the heat mediumsecond connection port 22y, the heat mediumsecond connection port 22y and the gas-liquidseparation inflow port 32 are connected to each other through a gas-liquidseparation inflow pipe 35, and the gas-liquidseparation inflow port 32 is located at a position higher than the heat mediumsecond connection port 22y. - According to claim 6 of the invention, in the heat medium circulation device described in claim 5, the gas-liquid
separation inflow pipe 35 includes a gas-liquid separation lateralinflow pipe portion 35a connected to the heat mediumsecond connection port 22y and a gas-liquid separation verticalinflow pipe portion 35b connected to the gas-liquidseparation inflow port 32, the pressure reliefvalve connecting pipe 42 includes a lateralconnection pipe portion 42a connected to the pressure reliefvalve connection port 34, and a verticalconnection pipe portion 42b connected to thepressure relief valve 40, and the lateralconnection pipe portion 42a is placed above the gas-liquid separation lateralinflow pipe portion 35a. - According to claim 7 of the invention, in the heat medium circulation device described in claim 6, the lateral
connection pipe portion 42a is placed in parallel to the gas-liquid separation lateralinflow pipe portion 35a. - According to the present invention, a space of a heat medium circuit can be saved by connecting a pressure relief valve to a gas-liquid separating section.
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Fig. 1 is a diagram showing a configuration of a heat medium circulation device according to an embodiment of the present invention; -
Fig. 2 is a perspective view showing essential portions of an outdoor unit of the heat medium circulation device; -
Figs. 3 are side views showing essential portions of the outdoor unit; -
Figs. 4 are diagrams showing a configuration of a gas-liquid separating section used in the embodiment; -
Fig. 5 is a side view showing the gas-liquid separating section and a pressure relief valve used in the embodiment; and -
Fig. 6 is a perspective view showing a heat medium chamber of the outdoor unit. - In a heat medium circulation device of a first embodiment of the present invention, a pressure relief valve is connected to a gas-liquid separating section. According to this embodiment, a space of a heat medium circuit can be saved by connecting the pressure relief valve to the gas-liquid separating section.
- According to a second embodiment of the invention, in the heat medium circulation device of the first embodiment, the gas-liquid separating section includes a gas-liquid separation inflow port through which the heat medium flows into a cylindrical inner space, a gas-liquid separation outflow port through which the heat medium flows out from the cylindrical inner space, and a pressure relief valve connection port to which the pressure relief valve is connected, and the pressure relief valve and the pressure relief valve connection port are connected to each other through a pressure relief valve connecting pipe. According to this embodiment, the pressure relief valve can be connected to the gas-liquid separating section by connecting the pressure relief valve and the pressure relief valve connection port to each other through the pressure relief valve connecting pipe.
- According to a third embodiment of the invention, in the heat medium circulation device of the second embodiment, the gas-liquid separation inflow port is provided in a bottom surface of the gas-liquid separating section, and the gas-liquid separation outflow port and the pressure relief valve connection port are provided in a side surface of the gas-liquid separating section, and the pressure relief valve connection port is located at a position higher than the gas-liquid separation outflow port. According to this embodiment, even when operation of the gas-liquid separating section has a problem, it is possible to flow out the gas by the pressure relief valve, and safety can be enhanced.
- According to a fourth embodiment of the invention, in the heat medium circulation device of the first embodiment, the pressure relief valve is located in a space above the use-side heat exchanger. According to this embodiment, the space above the use-side heat exchanger can effectively be utilized, and space of the heat medium circuit can be saved.
- According to a fifth embodiment of the invention, in the heat medium circulation device of the second embodiment, the use-side heat exchanger includes a heat medium first connection port in a lower portion of a side surface of the use-side heat exchanger, and a heat medium second connection port in an upper portion of the side surface of the use-side heat exchanger, the heat medium is introduced into the use-side heat exchanger from the heat medium first connection port, and the heat medium introduced into the use-side heat exchanger is discharged out from the heat medium second connection port, the heat medium second connection port and the gas-liquid separation inflow port are connected to each other through a gas-liquid separation inflow pipe, and the gas-liquid separation inflow port is located at a position higher than the heat medium second connection port. According to this embodiment, the gas-liquid separating section can be placed above the use-side heat exchanger, and space of the heat medium circuit can be saved.
- According to a sixth embodiment of the invention, in the heat medium circulation device of the fifth embodiment, the gas-liquid separation inflow pipe includes a gas-liquid separation lateral inflow pipe portion connected to the heat medium second connection port and a gas-liquid separation vertical inflow pipe portion connected to the gas-liquid separation inflow port, the pressure relief valve connecting pipe includes a lateral connection pipe portion connected to the pressure relief valve connection port, and a vertical connection pipe portion connected to the pressure relief valve, and the lateral connection pipe portion is placed above the gas-liquid separation lateral inflow pipe portion. According to this embodiment, the gas-liquid separating section and the pressure relief valve can be placed above the use-side heat exchanger, and space of the heat medium circuit can be saved.
- According to a seventh embodiment of the invention, in the heat medium circulation device of the sixth embodiment, the lateral connection pipe portion is placed in parallel to the gas-liquid separation lateral inflow pipe portion. According to this embodiment, the use-side heat exchanger, the gas-liquid separating section and the pressure relief valve can be placed in the limited space.
- An embodiment of the present invention will be described below with reference to the drawings.
-
Fig. 1 is a diagram showing a configuration of a heat medium circulation device according to the embodiment. - The heat medium circulation device of the embodiment includes a
refrigerant circuit 10 and aheat medium circuit 20. - The
refrigerant circuit 10 is formed by connecting acompressor 11, a use-side heat exchanger 12, anexpansion device 13 and a heat source-side heat exchanger 14 to one another through a refrigerant pipe, and refrigerant circulates through therefrigerant circuit 10. - The heat medium circuit 20circulates heat medium heated by the refrigerant discharged out from the
compressor 11 in the use-side heat exchanger 12 through a use-side terminal 1. - The
heat medium circuit 20 includes a gas-liquid separating section 30 which separates gas in theheat medium circuit 20 from heat medium, and atransfer pump 21 for circulating the heat medium. - The
heat medium circuit 20 further includes apressure relief valve 40. In this embodiment, thepressure relief valve 40 is connected to the gas-liquid separating section 30. Adischarge device 50 which discharges gas separated by the gas-liquid separating section 30 is connected to the gas-liquid separating section 30. - The
transfer pump 21 is placed in anindoor unit 2. - It is preferable that the
refrigerant circuit 10 includes a four-way valve 15 which switches flow of refrigerant. - An
air blower 16 is provided at a position opposed to the heat source-side heat exchanger 14. - Propane which is combustible refrigerant is used as refrigerant. Instead of the combustible refrigerant, it is possible to use any of R1234yf, R1234ze and R32 which are slightly flammable refrigerants.
- Water or antifreeze liquid is used as the heat medium.
- The gas-
liquid separating section 30 and thepressure relief valve 40 are placed in theheat medium circuit 20 located downstream of the use-side heat exchanger 12. - An
outdoor unit 3 is divided into aheat medium chamber 3a (seeFig. 2 ), amachine chamber 3b and anair blowing chamber 3c. - At least a portion of the use-
side heat exchanger 12, the gas-liquid separating section 30, thepressure relief valve 40 and thedischarge device 50 are placed in theheat medium chamber 3a. Thecompressor 11, theexpansion device 13 and the four-way valve 15 are placed in themachine chamber 3b. The heat source-side heat exchanger 14 and theair blower 16 are placed in theair blowing chamber 3c. - It is possible to heat or cool the heat medium by switching the four-
way valve 15. - When the heat medium is heated, refrigerant compressed by the
compressor 11 flows through the use-side heat exchanger 12, theexpansion device 13 and the heat source-side heat exchanger 14 in this order. The refrigerant is decompressed by theexpansion device 13, heat of the refrigerant is absorbed by the heat source-side heat exchanger 14, and the refrigerant is sucked into thecompressor 11. By flowing the refrigerant compressed by thecompressor 11 into the use-side heat exchanger 12 in this manner, the heat medium can be heated. - When the heat medium is cooled, refrigerant compressed by the
compressor 11 flows through the heat source-side heat exchanger 14, theexpansion device 13 and the use-side heat exchanger 12 in this order. The refrigerant is decompressed by theexpansion device 13, heat of the refrigerant is absorbed by the use-side heat exchanger 12 and the refrigerant is sucked into thecompressor 11. By flowing the refrigerant compressed by thecompressor 11 into the heat source-side heat exchanger 14 in this manner, the heat medium can be cooled. - The heat medium which is cooled or heated by the use-
side heat exchanger 12 is transferred to the use-side terminal 1 by thetransfer pump 21, and the heat medium whose heat is absorbed or radiated by the use-side terminal 1 is returned to the use-side heat exchanger 12. - Especially when a plate-type heat exchanger is used as the use-
side heat exchanger 12, there is a possibility that refrigerant which flows through therefrigerant circuit 10 is mixed into theheat medium circuit 20 by damage of the use-side heat exchanger 12. - If refrigerant which leaks into the
heat medium circuit 20 is separated from liquid phase heat medium by the gas-liquid separating section 30 in this manner, the refrigerant can be discharged out from thedischarge device 50. - In the
outdoor unit 3, the gas-liquid separating section 30 is plated in theheat medium circuit 20 which is located downstream of the use-side heat exchanger 12. Therefore, it is possible to suppress a case where refrigerant which leaks into theheat medium circuit 20 is guided into the use-side terminal 1. - When the
indoor unit 2 is located downstream of the use-side heat exchanger 12 and upstream of the use-side terminal 1, the gas-liquid separating section 30 should be placed upstream of theindoor unit 2, but it is preferable that the gas-liquid separating section 30 is placed in theoutdoor unit 3 as in this embodiment. - The gas-
liquid separating section 30 can separate the leaked refrigerant and in addition, the gas-liquid separating section 30 can separate air existing in theheat medium circuit 20. Especially, when heat medium is charged into theheat medium circuit 20 at the time of installation of the heat medium circulation device, the gas-liquid separating section 30 is utilized for removing air from theheat medium circuit 20. - Although the
transfer pump 21 is placed in theindoor unit 2 in this embodiment, thetransfer pump 21 may be placed in theoutdoor unit 3. When thetransfer pump 21 is placed in theoutdoor unit 3, it is preferable that thetransfer pump 21 is placed in theheat medium chamber 3a. -
Fig. 2 is a perspective view showing essential portions of the outdoor unit of the heat medium circulation device. - In the
outdoor unit 3, awall surface material 60 is placed between a bottom surface materialouter periphery 3d and a top surface materialouter periphery 3e. Thewall surface material 60 includes a firstwall surface material 61 and a secondwall surface material 62 which is adjacent to the firstwall surface material 61. - The
heat medium chamber 3a and themachine chamber 3b are divided by afirst partition plate 71. Thefirst partition plate 71 is provided with an opening, and theheat medium chamber 3a and themachine chamber 3b keep air permeability. Themachine chamber 3b and theair blowing chamber 3c are divided by asecond partition plate 72, thereby dividing theoutdoor unit 3 into theheat medium chamber 3a, themachine chamber 3b and theair blowing chamber 3c. Thefirst partition plate 71 prevents heat medium which leaks out from thepressure relief valve 40 from scattering to thecompressor 11 placed in themachine chamber 3b. - One
side 71x (seeFigs. 3 ) of thefirst partition plate 71 abuts against the firstwall surface material 61, and theother side 71y of thefirst partition plate 71 abuts against the secondwall surface material 62. - The
heat medium chamber 3a is formed by a space which is surrounded by thefirst partition plate 71, the firstwall surface material 61 and the secondwall surface material 62. - By utilizing the first
wall surface material 61 and the secondwall surface material 62 which are adjacent to each other, theheat medium chamber 3a is formed at a corner portion of theoutdoor unit 3. According to this, even when heat medium leaks out, theheat medium chamber 3a can be formed at a position where the heat medium does not exert an influence on thecompressor 11, theexpansion device 13 and the heat source-side heat exchanger 14. - Therefore, since the
heat medium chamber 3a where the use-side heat exchanger 12, the gas-liquid separating section 30 and thepressure relief valve 40 are placed is separated from themachine chamber 3b and theair blowing chamber 3c, even if heat medium leaks out, the heat medium does not exert an influence on thecompressor 11, theexpansion device 13 and the heat source-side heat exchanger 14. - An
opening 80 is formed in the firstwall surface material 61. -
Figs. 3 are side views showing essential portions of the outdoor unit. - The first
wall surface material 61 is provided with theopening 80 at a position corresponding to an operatinglever 41 of thepressure relief valve 40. Theopening 80 is provided at a position corresponding to theheat medium chamber 3a which is divided from themachine chamber 3b by thefirst partition plate 71. Theopening 80 formed in the firstwall surface material 61 is located in theheat medium chamber 3a, and theopening 80 does not open from themachine chamber 3b. Since theopening 80 does not open from themachine chamber 3b, even when heat medium leaks out, it is possible to prevent the heat medium from entering into themachine chamber 3b from theheat medium chamber 3a. - The
pressure relief valve 40 is placed at a position opposed to theopening 80. When pressure in theheat medium circuit 20 becomes equal to or higher than predetermined pressure, thepressure relief valve 40 releases heat medium to atmosphere so that the pressure in theheat medium circuit 20 does not become abnormal pressure which is equal to or higher than the predetermined pressure. - The
pressure relief valve 40 includes the operatinglever 41. By manually operating the operatinglever 41, heat medium can be released to atmosphere from theheat medium circuit 20. - The operating
lever 41 of thepressure relief valve 40 can be operated from theopening 80, and when heat medium is charged into theheat medium circuit 20 or when heat medium is discharged out from theheat medium circuit 20, thepressure relief valve 40 can be utilized. - Although it is not illustrated in the drawings, when it is unnecessary to operate the operating
lever 41, theopening 80 is closed by a lid. Upper and lower portions of theopening 80 includes fastening holes. By mountingfastening tools 81 in the fastening holes, the lid is mounted on the firstwall surface material 61. -
Figs. 4 are diagrams showing a configuration of the gas-liquid separating section used in the embodiment, whereinFig. 4(a) is a perspective view of a partially cut-away gas-liquid separating section, andFig. 4(b) is a diagram showing a configuration of a gas-liquid separation inflow port and a gas-liquid separation outflow port of the gas-liquid separating section. - The gas-
liquid separating section 30 includes the gas-liquidseparation inflow port 32 through which heat medium flows into a cylindricalinner space 31, the gas-liquidseparation outflow port 33 through which heat medium flows out from the cylindricalinner space 31, and a pressure reliefvalve connection port 34 to which thepressure relief valve 40 is connected. - The gas-liquid
separation inflow port 32 is provided on a bottom surface of the gas-liquid separating section 30, and the gas-liquidseparation outflow port 33 and the pressure reliefvalve connection port 34 are provided on a side surface of the gas-liquid separating section 30. - By flowing the heat medium from the bottom surface of the gas-
liquid separating section 30 and flowing out the heat medium from the side surface of the gas-liquid separating section 30 in this manner, a high gas-liquid separation ratio can be expected. - The heat medium flows in from the gas-liquid
separation inflow port 32 and flows out from the gas-liquidseparation outflow port 33. The gas-liquidseparation inflow port 32 is eccentric from avirtual axis 31x of the cylindricalinner space 31 at a position separated from the gas-liquidseparation outflow port 33. Therefore, time during which heat medium stays in the cylindricalinner space 31 can be increased, and the high gas-liquid separation ratio can be expected. - A
bottle diameter 31R of the cylindricalinner space 31 is two times or more of anentrance diameter 32R of the gas-liquidseparation inflow port 32. Therefore, it is possible to reduce the flow speed of heat medium which flows in from the gas-liquidseparation inflow port 32, and the high gas-liquid separation ratio can be expected. - An
exit diameter 33R of the gas-liquidseparation outflow port 33 is equal to or greater than theentrance diameter 32R. Therefore, the flow speed of the heat medium which flows out from the gas-liquidseparation outflow port 33 can be made smaller than the flow speed of the heat medium which flows in from the gas-liquidseparation inflow port 32, and the high gas-liquid separation ratio can be expected. - The
discharge device 50 is provided therein with afloat 51, and gas separated by the gas-liquid separating section 30 moves to an upper portion of thefloat 51. When gas does not exist in thedischarge device 50, thefloat 51 is located at an upper end of thedischarge device 50. -
Fig. 5 is a side view showing the gas-liquid separating section and the pressure relief valve used in the embodiment. - The gas-liquid
separation outflow port 33 is located at a position of aheight 33h which is equal to or smaller than a half of abottle height 31h of the cylindricalinner space 31. It is further preferable that theheight 33h of the gas-liquidseparation outflow port 33 is equal to or smaller than 1/3 of thebottle height 31h of the cylindricalinner space 31. Therefore, since a space where gas stays can be formed at aheight 34h which is higher than theheight 33h of the gas-liquidseparation outflow port 33 of the cylindricalinner space 31, the high gas-liquid separation ratio can be expected. Here, theheight 33h of the gas-liquidseparation outflow port 33 is a height from a bottom surface of the cylindricalinner space 31 to a center of theexit diameter 33R of the gas-liquidseparation outflow port 33. - The pressure relief
valve connection port 34 is located at theheight 34h which is higher than theheight 33h of the gas-liquidseparation outflow port 33. Therefore, even when operation of the gas-liquid separating section 30 has a problem, it is possible to flow out the gas by thepressure relief valve 40, and safety can be enhanced. - The
pressure relief valve 40 and the pressure reliefvalve connection port 34 are connected to each other through a pressure reliefvalve connection pipe 42. - The pressure relief
valve connection pipe 42 includes a lateralconnection pipe portion 42a connected to the pressure reliefvalve connection port 34, and a verticalconnection pipe portion 42b connected to thepressure relief valve 40. Thepressure relief valve 40 may be connected directly to the gas-liquid separating section 30 without through the pressure reliefvalve connection pipe 42. - Gas introduced into the
discharge device 50 is discharged out from adischarge port 52. If gas is discharged out from thedischarge port 52, the float 51 (seeFig. 4(a) ) is located at the upper end of thedischarge device 50, thereby closing thedischarge port 52. -
Fig. 6 is a perspective view showing the heat medium chamber of the outdoor unit. - A
height 12h of the use-side heat exchanger 12 is greater than itswidth 12w anddepth 12b. - A lower portion of a side surface of the use-
side heat exchanger 12 includes a heat mediumfirst connection port 22x, and an upper portion of the side surface of the use-side heat exchanger 12 includes a heat mediumsecond connection port 22y. - The lower portion of the side surface of the use-
side heat exchanger 12 includes a refrigerantfirst connection port 17x, and the upper portion of the side surface of the use-side heat exchanger 12 includes a refrigerantsecond connection port 17y. - The heat medium is introduced into the use-
side heat exchanger 12 from the heat mediumfirst connection port 22x, and the heat medium introduced into the use-side heat exchanger 12 is discharged out from the heat mediumsecond connection port 22y. - When the heat medium is heated, refrigerant compressed by the
compressor 11 is introduced into the use-side heat exchanger 12 from the refrigerantsecond connection port 17y, and the refrigerant introduced into the use-side heat exchanger 12 is discharged out from the refrigerantfirst connection port 17x. - The heat medium
second connection port 22y and the gas-liquidseparation inflow port 32 are connected to each other through a gas-liquidseparation inflow pipe 35. - The gas-liquid
separation inflow pipe 35 includes a gas-liquid separation lateralinflow pipe portion 35a connected to the heat mediumsecond connection port 22y, and a gas-liquid separation verticalinflow pipe portion 35b connected to the gas-liquidseparation inflow port 32. - The gas-liquid
separation inflow port 32 is located at a position higher than the heat mediumsecond connection port 22y. - The bottom surface of the gas-
liquid separating section 30 is provided with the gas-liquidseparation inflow port 32, and the gas-liquidseparation inflow port 32 is located at the position higher than the heat mediumsecond connection port 22y in this manner. According to this, the gas-liquid separating section 30 which is required to be placed at a high position among theheat medium circuit 20 is easily be placed, the gas-liquid separating section 30 can be plated above the use-side heat exchanger 12, and a space of theheat medium circuit 20 can be saved. - The gas-
liquid separating section 30 is placed at the position higher than the use-side heat exchanger 12 and thepressure relief valve 40 is placed on the side of the gas-liquid separating section 30. Especially according to this configuration, the gas-liquid separating section 30 and thepressure relief valve 40 are placed above the use-side heat exchanger 12, and a space of theheat medium chamber 3a can be saved. - Further, since the gas-liquid
separation inflow pipe 35 includes the gas-liquid separation lateralinflow pipe portion 35a and the gas-liquid separation verticalinflow pipe portion 35b, a flowing direction of heat medium discharged out from the use-side heat exchanger 12 is changed until the heat medium flows into the gas-liquid separating section 30. Therefore, the high gas-liquid separation ratio can be expected. - Further, by connecting the
pressure relief valve 40 to the gas-liquid separating section 30, a space of theheat medium circuit 20 can be saved. - The
pressure relief valve 40 is located at the position higher than the use-side heat exchanger 12 and thepressure relief valve 40 is placed in the upper space of the use-side heat exchanger 12. Especially according to this configuration, the upper space of the use-side heat exchanger 12 can effectively be utilized, and the space of theheat medium circuit 20 can be saved. - Further, the lateral
connection pipe portion 42a connected to the pressure reliefvalve connection port 34 is placed above the gas-liquid separation lateralinflow pipe portion 35a. According to this configuration, the gas-liquid separating section 30 and thepressure relief valve 40 can be placed above the use-side heat exchanger 12, and the space of theheat medium circuit 20 can be saved. - The lateral
connection pipe portion 42a is placed in parallel to the gas-liquid separation lateralinflow pipe portion 35a. Especially according to this configuration, the use-side heat exchanger 12, the gas-liquid separating section 30 and thepressure relief valve 40 can be placed in a limited spaced. - An exit joint 36 is connected to the gas-liquid
separation flow exit 33, and a heat mediumfirst connection pipe 23 is connected to the heat mediumfirst connection port 22x. An entrance joint 37 is connected to the heat mediumfirst connection pipe 23. - The exit joint 36 and the entrance joint 37 project outward from the second
wall surface material 62 which is located in theheat medium chamber 3a. - The
heat medium chamber 3a is formed in a corner portion of theoutdoor unit 3 utilizing the firstwall surface material 61 and secondwall surface material 62 which are adjacent to each other. Therefore, the exit joint 36 and the entrance joint 37 easily project from theoutdoor unit 3. - The embodiment supports the following configuration.
- A heat medium circulation device comprising: a refrigerant circuit to which a compressor, a use-side heat exchanger, an expansion device and a heat source-side heat exchanger are connected, and through which refrigerant circulates; a heat medium circuit which circulates heat medium cooled or heated by the refrigerant discharged out from the compressor in the use-side heat exchanger through a use-side terminal; a gas-liquid separating section for separating gas in the heat medium circuit from the heat medium; and a pressure relief valve for releasing the heat medium circuit into atmosphere when pressure in the heat medium circuit becomes equal to or higher than predetermined pressure; wherein the pressure relief valve is connected to the gas-liquid separating section.
- According to this configuration, a space of a heat medium circuit can be saved by connecting the pressure relief valve to the gas-liquid separating section.
- The heat medium circulation device according to configuration 1, wherein the gas-liquid separating section is placed in the heat medium circuit located downstream of the use-side heat exchanger, the gas-liquid separating section includes a gas-liquid separation inflow port through which the heat medium flows into a cylindrical inner space, a gas-liquid separation outflow port through which the heat medium flows out from the cylindrical inner space, and a pressure relief valve connection port to which the pressure relief valve is connected, and the pressure relief valve and the pressure relief valve connection port are connected to each other through a pressure relief valve connecting pipe.
- According to this configuration, the pressure relief valve can be connected to the gas-liquid separating section by connecting the pressure relief valve and the pressure relief valve connection port to each other through the pressure relief valve connecting pipe.
- The heat medium circulation device according to the
configuration 2, wherein the gas-liquid separation inflow port is provided in a bottom surface of the gas-liquid separating section, and the gas-liquid separation outflow port and the pressure relief valve connection port are provided in a side surface of the gas-liquid separating section, and the pressure relief valve connection port is located at a position higher than the gas-liquid separation outflow port. - According to this configuration, even when operation of the gas-liquid separating section has a problem, it is possible to flow out the gas by the pressure relief valve, and safety can be enhanced.
- The heat medium circulation device according to any one of the configurations 1 to 3, wherein the pressure relief valve is located in a space above the use-side heat exchanger.
- According to this configuration, the space above the use-side heat exchanger can effectively be utilized, and space of the heat medium circuit can be saved.
- The heat medium circulation device according to the
configuration - According to this configuration, the gas-liquid separating section can be placed above the use-side heat exchanger, and space of the heat medium circuit can be saved.
- The heat medium circulation device according to the configuration 5, wherein the gas-liquid separation inflow pipe includes a gas-liquid separation lateral inflow pipe portion connected to the heat medium second connection port and a gas-liquid separation vertical inflow pipe portion connected to the gas-liquid separation inflow port, the pressure relief valve connecting pipe includes a lateral connection pipe portion connected to the pressure relief valve connection port, and a vertical connection pipe portion connected to the pressure relief valve, and the lateral connection pipe portion is placed above the gas-liquid separation lateral inflow pipe portion.
- According to this configuration, the gas-liquid separating section and the pressure relief valve can be placed above the use-side heat exchanger, and space of the heat medium circuit can be saved.
- The heat medium circulation device according to the configuration 6, wherein the lateral connection pipe portion is placed in parallel to the gas-liquid separation lateral inflow pipe portion.
- According to this configuration, the use-side heat exchanger, the gas-liquid separating section and the pressure relief valve can be placed in the limited space.
- The present invention is suitable especially for a heat medium circulation device using combustible refrigerant.
-
- 1
- use-side terminal
- 2
- indoor unit
- 3
- outdoor unit
- 3a
- heat medium chamber
- 3b
- machine chamber
- 3c
- air blowing chamber
- 3d
- bottom surface material outer periphery
- 3e
- top surface material outer periphery
- 10
- refrigerant circuit
- 11
- compressor
- 12
- use-side heat exchanger
- 12b
- depth
- 12h
- height
- 12w
- width
- 13
- expansion device
- 14
- heat source-side heat exchanger
- 15
- four-way valve
- 16
- air blower
- 17x
- refrigerant first connection port
- 17y
- refrigerant second connection port
- 20
- heat medium circuit
- 21
- transfer pump
- 22x
- heat medium first connection port
- 22y
- heat medium second connection port
- 23
- heat medium first connection pipe
- 30
- gas-liquid separating section
- 31
- cylindrical inner space
- 31h
- bottle height
- 31R
- bottle diameter
- 31x
- virtual axis
- 32
- gas-liquid separation inflow port
- 32R
- entrance diameter
- 33
- gas-liquid separation outflow port
- 33h
- height
- 33R
- exit diameter
- 34
- pressure relief valve connection port
- 34h
- position
- 35
- gas-liquid separation inflow pipe
- 35a
- gas-liquid separation lateral inflow pipe portion
- 35b
- gas-liquid separation vertical inflow pipe portion
- 36
- exit joint
- 37
- entrance joint
- 40
- pressure relief valve
- 41
- operating lever (operating section)
- 42
- pressure relief valve connection pipe
- 42a
- lateral connection pipe portion
- 42b
- vertical connection pipe portion
- 50
- discharge device
- 51
- float
- 52
- discharge port
- 60
- wall surface material
- 61
- first wall surface material
- 62
- second wall surface material
- 71
- first partition plate
- 71x
- one side
- 71y
- other side
- 72
- second partition plate
- 80
- opening
- 81
- fastening tool
Claims (7)
- A heat medium circulation device comprising:a refrigerant circuit (10) to which a compressor (11), a use-side heat exchanger (12), an expansion device (13) and a heat source-side heat exchanger (14) are connected, and through which refrigerant circulates;a heat medium circuit (20) which circulates heat medium cooled or heated by the refrigerant discharged out from the compressor (11) in the use-side heat exchanger (12) through a use-side terminal (1);a gas-liquid separating section (30) for separating gas in the heat medium circuit (20) from the heat medium; anda pressure relief valve (40) for releasing the heat medium circuit (20) into atmosphere when pressure in the heat medium circuit (20) becomes equal to or higher than predetermined pressure; whereinthe pressure relief valve (40) is connected to the gas-liquid separating section (30).
- The heat medium circulation device according to claim 1, wherein the gas-liquid separating section (30) is placed in the heat medium circuit (20) located downstream of the use-side heat exchanger (12),
the gas-liquid separating section (30) includes a gas-liquid separation inflow port (32) through which the heat medium flows into a cylindrical inner space (31), a gas-liquid separation outflow port (33) through which the heat medium flows out from the cylindrical inner space (31), and a pressure relief valve connection port (34) to which the pressure relief valve (40) is connected, and the pressure relief valve (40) and the pressure relief valve connection port (34) are connected to each other through a pressure relief valve connecting pipe (42). - The heat medium circulation device according to claim 2, wherein the gas-liquid separation inflow port (32) is provided in a bottom surface of the gas-liquid separating section (30), and the gas-liquid separation outflow port (33) and the pressure relief valve connection port (34) are provided in a side surface of the gas-liquid separating section (30), and the pressure relief valve connection port (34) is located at a position higher than the gas-liquid separation outflow port (33).
- The heat medium circulation device according to any one of claims 1 to 3, wherein the pressure relief valve (40) is located in a space above the use-side heat exchanger (12).
- The heat medium circulation device according to claim 2 or 3, wherein the use-side heat exchanger (12) includes a heat medium first connection port (22x) in a lower portion of a side surface of the use-side heat exchanger (12), and a heat medium second connection port (22y) in an upper portion of the side surface of the use-side heat exchanger (12),the heat medium is introduced into the use-side heat exchanger (12) from the heat medium first connection port (22x), and the heat medium introduced into the use-side heat exchanger (12) is discharged out from the heat medium second connection port (22y),the heat medium second connection port (22y) and the gas-liquid separation inflow port (32) are connected to each other through a gas-liquid separation inflow pipe (35), andthe gas-liquid separation inflow port (32) is located at a position higher than the heat medium second connection port (22y).
- The heat medium circulation device according to claim 5, wherein the gas-liquid separation inflow pipe (35) includes a gas-liquid separation lateral inflow pipe portion (35a) connected to the heat medium second connection port (22y) and a gas-liquid separation vertical inflow pipe portion (35b) connected to the gas-liquid separation inflow port (32),the pressure relief valve connecting pipe (42) includes a lateral connection pipe portion (42a) connected to the pressure relief valve connection port (34), and a vertical connection pipe portion (42b) connected to the pressure relief valve (40), andthe lateral connection pipe portion (42a) is placed above the gas-liquid separation lateral inflow pipe portion (35a).
- The heat medium circulation device according to claim 6, wherein the lateral connection pipe portion (42a) is placed in parallel to the gas-liquid separation lateral inflow pipe portion (35a).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022129792A JP2024027209A (en) | 2022-08-17 | 2022-08-17 | Heat medium circulation device |
Publications (1)
Publication Number | Publication Date |
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EP4325129A1 true EP4325129A1 (en) | 2024-02-21 |
Family
ID=87567110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP23190651.2A Pending EP4325129A1 (en) | 2022-08-17 | 2023-08-09 | Heat medium circulation device |
Country Status (2)
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EP (1) | EP4325129A1 (en) |
JP (1) | JP2024027209A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3734198A1 (en) * | 2019-04-29 | 2020-11-04 | Wolf GmbH | Refrigerant separating device for a heat pump system and method for operating a refrigerant separating device |
DE102020103743A1 (en) * | 2020-02-13 | 2021-08-19 | Viessmann Werke Gmbh & Co Kg | Heat pump system |
WO2022156913A1 (en) * | 2021-01-25 | 2022-07-28 | Wolf Gmbh | Separation device, in particular for a heat pump system |
-
2022
- 2022-08-17 JP JP2022129792A patent/JP2024027209A/en active Pending
-
2023
- 2023-08-09 EP EP23190651.2A patent/EP4325129A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3734198A1 (en) * | 2019-04-29 | 2020-11-04 | Wolf GmbH | Refrigerant separating device for a heat pump system and method for operating a refrigerant separating device |
DE102020103743A1 (en) * | 2020-02-13 | 2021-08-19 | Viessmann Werke Gmbh & Co Kg | Heat pump system |
WO2022156913A1 (en) * | 2021-01-25 | 2022-07-28 | Wolf Gmbh | Separation device, in particular for a heat pump system |
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JP2024027209A (en) | 2024-03-01 |
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