JP2008082684A - Heat pump - Google Patents

Heat pump Download PDF

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Publication number
JP2008082684A
JP2008082684A JP2006266756A JP2006266756A JP2008082684A JP 2008082684 A JP2008082684 A JP 2008082684A JP 2006266756 A JP2006266756 A JP 2006266756A JP 2006266756 A JP2006266756 A JP 2006266756A JP 2008082684 A JP2008082684 A JP 2008082684A
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JP
Japan
Prior art keywords
condensed water
drain pipe
heater
heat pump
heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2006266756A
Other languages
Japanese (ja)
Inventor
Yasunobu Ito
康伸 伊藤
Original Assignee
Denso Corp
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp, 株式会社デンソー filed Critical Denso Corp
Priority to JP2006266756A priority Critical patent/JP2008082684A/en
Publication of JP2008082684A publication Critical patent/JP2008082684A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22Means for preventing condensation or evacuating condensate
    • F24F13/222Means for preventing condensation or evacuating condensate for evacuating condensate
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H4/00Fluid heaters using heat pumps
    • F24H4/02Liquid heaters
    • F24H4/04Storage heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00Removing ice or water from heat-exchange apparatus
    • F28F17/005Means for draining condensates from heat exchangers, e.g. from evaporators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/006Preventing deposits of ice
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22Means for preventing condensation or evacuating condensate
    • F24F13/222Means for preventing condensation or evacuating condensate for evacuating condensate
    • F24F2013/227Condensate pipe for drainage of condensate from the evaporator
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/40Geothermal heat-pumps

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the freezing of condensed water on the ground surface underneath the lower part of an outdoor unit. <P>SOLUTION: This heat pump comprising the outdoor unit 6 constituted to receive condensed water in a drain pan 61 is provided with drain piping 63 with its tip buried in the earth 72 to guide condensed water received in the drain pan 61, to the earth 72. Condensed water is thereby discharged into the earth 72 to prevent freezing of condensed water on the ground surface. In this case, the tip of the drain piping 63 is extended to a region where no freezing of condensed water occurs. Freezing of condensed water near the tip of the drain piping 63 is thereby prevented to positively discharge condensed water into the earth 72. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat pump that moves heat on a low temperature side to a high temperature side, and is particularly suitable for a heat pump air conditioner and a heat pump water heater.

Conventionally, regarding prevention of freezing of condensed water of outdoor units in heat pumps, a method of heating condensed water using heat of a cycle (for example, refer to Patent Document 1), a method of heating a condensed water by attaching a heater to a drain pan, A method of improving drainage of the drain pan and preventing the condensed water itself from freezing (for example, see Patent Document 2), a method of mounting an outdoor unit of a heat pump type hot water heater on a gantry, and the like are known.
JP 2004-218861 A Japanese Utility Model Publication No. 6-18823.

  However, the conventional heat pump described above has a problem that although condensed water is prevented from freezing in the outdoor unit, condensed water accumulated on the ground surface below the outdoor unit is frozen.

  In view of the above points, an object of the present invention is to prevent freezing of condensed water on the ground surface below an outdoor unit.

  In the first feature of the present invention, in a heat pump including an outdoor unit (6) configured to receive condensed water in a drain pan (61), a tip is embedded in the ground (72), and the drain pan (61) A drain pipe (63) for guiding the condensed water received to the underground (72) is provided.

  In such a configuration, since condensed water is discharged into the ground (72), it is possible to prevent the condensed water from freezing on the ground surface.

  In this case, the tip of the drain pipe (63) can be extended to a region where the condensed water does not freeze.

  If it does in this way, freezing of condensed water near the tip of drain piping (63) can be prevented, and condensed water can be discharged reliably in the ground (72).

  In this case, a heater (5) for heating the condensed water in the drain pipe (63) can be provided.

  If it does in this way, freezing of condensed water in drain piping (63) can be prevented, and condensed water can be discharged certainly in the ground (72).

  Moreover, a heat insulating material (8) can be provided outside the drain pipe (63). In this way, it is possible to more reliably prevent the condensed water from freezing in the drain pipe (63).

  In the second feature of the present invention, in the heat pump including the outdoor unit (6) configured to receive the condensed water by the drain pan (61), the condensed water received by the drain pan (61) is disposed below the outdoor unit (6). A drain pipe (63) leading to a place other than the drain pipe and a heater (5) for heating the condensed water in the drain pipe (63) are provided.

  In such a configuration, since the condensed water is guided to a place other than the lower part of the outdoor unit (6), it is possible to prevent the condensed water from freezing on the ground surface below the outdoor unit (6). At this time, the condensed water can be prevented from freezing in the drain pipe (63) by the heater (5), and the condensed water can be reliably discharged to a place other than the lower part of the outdoor unit (6).

  Also in this case, a heat insulating material (8) can be provided outside the drain pipe (63). In this way, it is possible to more reliably prevent the condensed water from freezing in the drain pipe (63).

  According to a third aspect of the present invention, there is provided a heat pump installation method having the first aspect of the present invention, wherein the periphery of the drain pipe (63) is covered with gravel or sand (73).

  In such a method, the condensed water discharged from the drain pipe (63) penetrates into the gravel or sand (73) layer, and the freezing of the condensed water near the tip of the drain pipe (63) is more reliably prevented. Is done.

  In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
A first embodiment of the present invention will be described. FIG. 1 is a diagram illustrating a configuration of a heat pump type hot water heater according to the present embodiment, and FIG. 2 is a schematic diagram illustrating a partial cross section of an outdoor unit.

  As shown in FIG. 1, the heat pump water heater includes a compressor 11, a water-refrigerant heat exchanger 12 that forms a heat exchanger for heat dissipation, a decompressor 13, an evaporator 14 that forms a heat exchanger for heat absorption, an accumulator 15, It consists of a hot water storage tank 16 or the like, and heat is exchanged between the refrigerant, which has been compressed by the compressor 11, and hot water, with the water-refrigerant heat exchanger 12, and the hot water is heated. The decompressed refrigerant is evaporated by the evaporator 14 and absorbs heat from the outside air. The accumulator 15 stores the surplus refrigerant as a liquid phase refrigerant and supplies the gas phase refrigerant and the refrigerating machine oil to the compressor 11. The hot water storage tank 16 stores hot water heated by heat exchange with the water-refrigerant heat exchanger 12.

  The electronic control device 2 receives an output signal from the outside air temperature sensor 3 that detects the outside air temperature, a signal related to the hot water temperature, and the like, and the electronic control device 2 uses a program set in advance based on these signals and the like. The throttle opening of the decompressor 13, the operating rate of the compressor 11, and energization to the first heater 4 (details will be described later) are controlled.

  As shown in FIG. 2, the outdoor unit 6 of the heat pump type hot water heater is installed and fixed on a base 71 made of a block or resin.

  In the outdoor unit 6, the evaporator 14 and the like are housed inside. A drain pan 61 for storing condensed water generated on the surface of the evaporator 14 is disposed below the evaporator 14, and a drain port 62 for discharging the condensed water in the drain pan 61 is formed at the lowest part of the drain pan 61. Has been.

  The drain port 62 is connected to a drain pipe 63 made of resin or metal that guides the condensed water received by the drain pan 61 to the ground 72. The drain pipe 63 has a tip that is substantially underground in the lower part of the outdoor unit 6. 72 is buried. More specifically, assuming that the depth of the underground 72 where the condensed water does not freeze in winter is the freezing depth D, the tip of the drain pipe 63 extends to a depth equal to or higher than the freezing depth D. Incidentally, in the case of Sapporo, the freezing depth D is about 60 cm. The drain pipe 63 is buried by a contractor. At that time, gravel, sand, and stones 73 are spread around the front end of the drain pipe 63 in order to promote the penetration of condensed water.

  The first heater 4, which is an electric heater, is attached to the lower side of the drain pan 61 and heats the condensed water accumulated in the drain pan 61 from the outside of the drain pan 61.

  A second heater 5 composed of an electric heater for heating the condensed water in the drain pipe 63 is disposed in a passage through which the condensed water flows in the drain pipe 63. The second heater 5 is formed in a string shape or a rod shape, and extends to the tip of the drain pipe 63. The second heater 5 is a so-called self-control heater, and the heater itself has a temperature detection function, and the surface temperature of the heater becomes constant. The second heater 5 is always operated while being connected to a power source in the outdoor unit 6 or a power source such as a house.

  In the heat pump type water heater of the present embodiment, the electronic control device 2 controls the first heater 4 to be energized when the outside air temperature (the temperature detected by the outside air temperature sensor 3) becomes, for example, 0 degrees Celsius or less. Thus, the condensed water in the drain pan 61 is heated by the first heater 4, so that the condensed water in the drain pan 61 is prevented from freezing. Note that the outside air temperature at the start of energization of the first heater 4 can be set freely.

  In addition, while the second heater 5 is connected to the power source, the condensed water in the drain pipe 63 is heated by the second heater 5, so that the condensed water in the drain pipe 63 is prevented from freezing.

  Therefore, the condensed water generated on the surface of the evaporator 14 is guided to the drain pan 61 and the drain pipe 63 and led to the underground 72 without being frozen in the drain pan 61 and the drain pipe 63.

  In this way, since the condensed water is discharged into the underground 72, the condensed water does not accumulate on the ground surface below the outdoor unit 6, and the appearance of the lower part of the outdoor unit 6 is ensured. In addition, since the condensed water is discharged into the underground 72, the condensed water is prevented from freezing on the ground surface, so that the person is not overturned due to the freezing, and human safety is ensured.

  At this time, since the tip of the drain pipe 63 is extended to a depth equal to or greater than the freezing depth D, the condensed water is prevented from freezing near the tip of the drain pipe 63, and the condensed water is reliably transferred to the underground 72. Can be discharged.

  Further, since gravel, sand, and stone 73 are spread around the tip of the drain pipe 63, the condensed water discharged from the drain pipe 63 penetrates into the gravel, sand, and stone 73 layers, and the drain pipe 63 Freezing of the condensed water near the tip of the water is more reliably prevented.

(Second Embodiment)
A second embodiment of the present invention will be described. FIG. 3 is a schematic view showing an outdoor unit in the heat pump type hot water heater according to the present embodiment, and FIG. 4 is a view showing an appearance of the drain pipe 63. The same or equivalent parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 3 and 4, in the present embodiment, the second heater 5 is disposed outside the drain pipe 63. More specifically, the second heater 5 is a so-called self-control heater formed in a tape shape, and is wound spirally over almost the entire length of the drain pipe 63.

  While the second heater 5 is connected to the power source, the condensed water in the drain pipe 63 is heated by the second heater 5 through the drain pipe 63, so the condensed water in the drain pipe 63 is heated. Freezing is prevented.

(Third embodiment)
A third embodiment of the present invention will be described. FIG. 5 is a cross-sectional view of the drain pipe 63 in the heat pump type water heater according to the present embodiment.

  As shown in FIG. 5, the second heater 5 of the present embodiment is composed of a heater wire and is embedded in the drain pipe 63. A heat insulating material 8 made of a material having a low thermal conductivity such as foamed resin is wound around the drain pipe 63. The second heater 5 and the heat insulating material 8 are disposed over almost the entire region of the drain pipe 63 in the longitudinal direction.

  While the second heater 5 is connected to the power source, the condensed water in the drain pipe 63 is heated by the second heater 5 through the drain pipe 63, so the condensed water in the drain pipe 63 is heated. Freezing is prevented.

  Further, since the heat generated by the second heater 5 is prevented from being radiated into the outside air by the heat insulating material 8, the condensed water in the drain pipe 63 is efficiently heated by the heat of the second heater 5. be able to.

(Fourth embodiment)
A fourth embodiment of the present invention will be described. FIG. 6 is a schematic diagram showing a partial cross section of the outdoor unit in the heat pump type hot water heater according to the present embodiment. The same or equivalent parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the first embodiment, the condensed water is guided to the underground 72 at substantially the lower part of the outdoor unit 6. However, in this embodiment, the condensed water is guided to a position away from the outdoor unit 6. For example, it is suitable when the lower part of the outdoor unit 6 is covered with concrete and it is difficult to bury the tip of the drain pipe 63 in the underground 72 below the outdoor unit 6.

  As shown in FIG. 6, the drain pipe 63 of the present embodiment extends to a drainage groove 74 that is a place excluding the lower part of the outdoor unit 6 and has no influence on the drainage of condensed water. Further, the second heater 5 is disposed in the drain pipe 63.

  According to the present embodiment, since the condensed water is discharged into the drainage groove 74, the condensed water does not accumulate on the ground surface below the outdoor unit 6, and the appearance of the lower part of the outdoor unit 6 is ensured. Further, since the condensed water is discharged to the drainage groove 74, the condensed water is prevented from freezing on the ground surface, so that the person is not overturned due to the freezing, and human safety is ensured.

  At this time, since the condensed water in the drain pipe 63 is prevented from being frozen by the second heater 5, the condensed water can be reliably discharged into the drain groove 74.

  Note that the drain pipe 63 may have an intermediate portion embedded in the ground 72 and a tip thereof facing the drain groove 74 as indicated by a one-dot chain line in FIG.

(Other embodiments)
In the heat pump type water heaters of the first to third embodiments, there is a concern that the condensed water in the drain pipe 63 may freeze due to a configuration in which the condensed water does not stay in the drain pipe 63 or water repellency. If not, the second heater 5 may not be used.

  Moreover, in the said 1st-3rd embodiment, gravel, sand, stone 73 grade | etc., Was spread around the front-end | tip part of the drain piping 63, but gravel, sand, stone 73 grade | etc., Need not be spread.

  Moreover, in each said embodiment, although the 2nd heater 5 was made into the self-control type, the 2nd heater 5 does not need to be a self-control type. In that case, a person may adjust the heater temperature, or a person may intermittently energize the heater, and the outside air temperature detected by the outside air temperature sensor 3 is, for example, 0 degrees Celsius or less. The electronic control device 2 may be controlled so that the second heater 5 is energized.

  Moreover, in each said embodiment, although the heat pump type hot water heater was shown, this invention is applicable also to a heat pump type air conditioner.

  Moreover, the heat insulating material 8 used in 3rd Embodiment can be used also for the heat pump of other embodiment.

It is a figure which shows the structure of the heat pump type water heater based on 1st Embodiment of this invention. It is a schematic diagram which shows the outdoor unit in the heat pump type water heater of FIG. It is a schematic diagram which shows the outdoor unit in the heat pump type water heater which concerns on 2nd Embodiment of this invention. It is a figure which shows the external appearance of the drain piping 63 of FIG. It is sectional drawing of the drain piping 63 in the heat pump type water heater which concerns on 3rd Embodiment of this invention. It is a schematic diagram which shows the outdoor unit in the heat pump type water heater which concerns on 4th Embodiment of this invention in a partial cross section.

Explanation of symbols

  6 ... outdoor unit, 14 ... heat exchanger for heat absorption, 61 ... drain pan, 63 ... drain piping, 72 ... underground.

Claims (9)

  1. An outdoor unit that exchanges heat between the refrigerant and the outside air in the heat absorption heat exchanger (14) and receives the condensed water generated in the heat absorption heat exchanger (14) in the drain pan (61) ( 6) In a heat pump comprising:
    A heat pump comprising a drain pipe (63) having a tip embedded in the ground (72) and guiding the condensed water received by the drain pan (61) to the ground (72).
  2. The heat pump according to claim 1, wherein a tip of the drain pipe (63) extends to a region where freezing of the condensed water does not occur.
  3. The heat pump according to claim 1 or 2, further comprising a heater (5) for heating the condensed water in the drain pipe (63).
  4. An outdoor unit that exchanges heat between the refrigerant and the outside air in the heat absorption heat exchanger (14) and receives the condensed water generated in the heat absorption heat exchanger (14) in the drain pan (61) ( 6) In a heat pump comprising:
    A drain pipe (63) for guiding the condensed water received by the drain pan (61) to a place excluding the lower part of the outdoor unit (6);
    A heat pump comprising: a heater (5) for heating the condensed water in the drain pipe (63).
  5. The heat pump according to claim 3 or 4, wherein the heater (5) is arranged in a passage through which condensed water flows in the drain pipe (63).
  6. The heat pump according to claim 3 or 4, wherein the heater (5) is disposed outside the drain pipe (63).
  7. The heat pump according to claim 3 or 4, wherein the heater (5) is embedded in the drain pipe (63).
  8. The heat pump according to any one of claims 1 to 7, further comprising a heat insulating material (8) outside the drain pipe (63).
  9. It is a method of installing the heat pump as described in any one of Claim 1 thru | or 3, Comprising: The circumference | surroundings of the front-end | tip part of the said drain piping (63) are covered with gravel or sand (73), It is characterized by the above-mentioned. How to install a heat pump.
JP2006266756A 2006-09-29 2006-09-29 Heat pump Pending JP2008082684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006266756A JP2008082684A (en) 2006-09-29 2006-09-29 Heat pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006266756A JP2008082684A (en) 2006-09-29 2006-09-29 Heat pump
DE200710046009 DE102007046009A1 (en) 2006-09-29 2007-09-26 Heat pump device and outdoor unit to be arranged for the same

Publications (1)

Publication Number Publication Date
JP2008082684A true JP2008082684A (en) 2008-04-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006266756A Pending JP2008082684A (en) 2006-09-29 2006-09-29 Heat pump

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JP (1) JP2008082684A (en)
DE (1) DE102007046009A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201001999D0 (en) * 2010-02-08 2010-03-24 Haven Ltd Frost protection system for condensate drain pipe
AT517936B1 (en) * 2016-02-23 2017-06-15 Guntamatic Heiztechnik Gmbh Apparatus for heat recovery

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113178U (en) * 1983-01-19 1984-07-31
JPS6083871U (en) * 1983-11-16 1985-06-10
JPS6322531U (en) * 1986-07-29 1988-02-15
JPH0379828U (en) * 1989-12-07 1991-08-15
JPH0552444A (en) * 1991-08-20 1993-03-02 Sanyo Electric Co Ltd Engine-driven heat pump device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4210008A1 (en) 1992-03-27 1993-09-30 Zeiss Carl Fa Eyeglass lens
JP2004218861A (en) 2003-01-09 2004-08-05 Denso Corp Drain pan anti-freezing structure in heat pump-type hot water supply unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113178U (en) * 1983-01-19 1984-07-31
JPS6083871U (en) * 1983-11-16 1985-06-10
JPS6322531U (en) * 1986-07-29 1988-02-15
JPH0379828U (en) * 1989-12-07 1991-08-15
JPH0552444A (en) * 1991-08-20 1993-03-02 Sanyo Electric Co Ltd Engine-driven heat pump device

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