CN111829174A - Heat pump heat source machine - Google Patents
Heat pump heat source machine Download PDFInfo
- Publication number
- CN111829174A CN111829174A CN202010095179.9A CN202010095179A CN111829174A CN 111829174 A CN111829174 A CN 111829174A CN 202010095179 A CN202010095179 A CN 202010095179A CN 111829174 A CN111829174 A CN 111829174A
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- Prior art keywords
- heat
- water
- refrigerant
- heat exchanger
- insulator
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- 239000003507 refrigerant Substances 0.000 claims abstract description 208
- 239000012212 insulator Substances 0.000 claims abstract description 133
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 127
- 238000009413 insulation Methods 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 25
- 238000007664 blowing Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Details Of Fluid Heaters (AREA)
Abstract
A heat pump heat source machine (1) is provided with: a refrigerant circuit (8) in which a refrigerant circulates in a pipe (3) and which connects a refrigerant flow path of the compressor (4) and the water-refrigerant heat exchanger (5), a pressure reducing device (6), and an evaporator (7) to each other by a pipe (3) in an annular shape; a blower (9) for generating air passing through the evaporator; and a bottom plate (11) on which the evaporator is mounted, wherein the water-refrigerant heat exchanger is covered with a heat insulating material (24), the water-refrigerant heat exchanger has a water inlet portion (28a), a water outlet portion (28b), and a heat exchange portion (5a) for exchanging heat between water and the refrigerant, the water inlet portion and the water outlet portion of the water-refrigerant heat exchanger are supported by support portions (24bA, 24bB) of the heat insulating material (24), and a gap is provided between the heat exchange portion and the inner surface of the heat insulating material. Thereby, a heat pump heat source unit of a water-refrigerant heat exchanger having improved durability of a heat insulator covering the water-refrigerant heat exchanger is provided.
Description
Technical Field
The present invention relates to a heat pump heat source machine.
Background
A heat pump heat source unit of this type of the related art is disposed with an air heat exchanger disposed on the back side of a water-heat exchanger and a blower fan.
The water-heat exchanger disposed in the air blowing passage of the air blowing fan is covered with a foam heat insulating container to insulate heat, and is covered with a protective cover to protect the heat exchanger (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2005-147619
Disclosure of Invention
Problems to be solved by the invention
However, in the above-described conventional structure, the water-heat exchanger and the foamed heat insulating container are almost in close contact (close contact), and there is a problem that the durability of the foamed heat insulating container is lowered due to an increase in the temperature of the water-heat exchanger.
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a heat pump heat source unit having a water-refrigerant heat exchanger in which durability of a heat insulator covering the water-refrigerant heat exchanger is improved.
Means for solving the problems
In order to solve the above problems of the prior art, a heat pump heat source machine according to the present invention includes: a refrigerant circuit in which a refrigerant circulates through pipes, and the refrigerant circuit is formed by connecting a compressor, a refrigerant flow path of a water-refrigerant heat exchanger, a pressure reducing device, and an evaporator in an annular shape by the pipes; a blower device that generates air that passes through the evaporator; and a bottom plate on which the evaporator is placed, the water-refrigerant heat exchanger being covered with a heat insulator, the water-refrigerant heat exchanger having a water inlet portion, a water outlet portion, and a heat exchange portion where water exchanges heat with the refrigerant, the water inlet portion and the water outlet portion of the water-refrigerant heat exchanger being supported by a support portion of the heat insulator, and a gap being provided between the heat exchange portion and an inner surface of the heat insulator.
Accordingly, the water inlet portion and the water outlet portion of the water-refrigerant heat exchanger are supported by the inner surface of the heat insulator, and a gap is provided between the heat exchange portion of the water-refrigerant heat exchanger, in which water and refrigerant exchange heat, and the inner surface of the heat insulator covering the water-refrigerant heat exchanger, whereby the refrigerant flow path through which high-temperature refrigerant flows does not contact the inner surface of the heat insulator, and therefore a heat pump heat source unit having a water-refrigerant heat exchanger in which the durability of the heat insulator covering the water-refrigerant heat exchanger is improved can be provided.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide a heat pump heat source unit having a water-refrigerant heat exchanger in which durability of a heat insulator covering the water-refrigerant heat exchanger is improved.
Drawings
Fig. 1(a) is a top internal view of a heat pump heat source unit according to an embodiment of the present invention, and (b) is a front internal view of the heat pump heat source unit.
Fig. 2 is a main-part side sectional view of the water-refrigerant heat exchanger of the heat pump heat source unit according to the embodiment of the present invention.
Fig. 3 is a main portion upper sectional view of another water-refrigerant heat exchanger of the heat pump heat source machine.
Fig. 4 is a fluid circuit diagram of a water heater using the heat pump heat source unit.
Fig. 5 is a side sectional view of a main portion of another water-refrigerant heat exchanger of the heat pump heat source machine.
Fig. 6 is a side sectional view of a main portion of another water-refrigerant heat exchanger of the heat pump heat source machine.
Description of the reference numerals
1 Heat pump heat source machine
2 can unit (tank unit)
3 piping
4 compressor
5 water-refrigerant heat exchanger
5a heat exchange part
6 pressure reducing device
7 evaporator
8 refrigerant circuit
9 air supply device
10 hot water supply cycle
11 bottom plate
12 hot water storage tank
13 water inlet pipe
14 hot water supply terminal
15 hot water supply pipe
16 circulating pump
17 division plate
20 right board
21 left plate
22 Top plate
23 front panel
23a air outlet
24 Heat insulation
24a upper side heat insulator
24b lower side heat insulator
Heat insulator above 24aA heat exchange part
Heat insulation piece below 24aB heat exchange part
First supporting part of 24bA heat insulation piece
24bB thermal shield second support
24cA refrigerant outlet side upper heat insulator
24cB Water Inlet side lower insulation
24dA refrigerant inlet side upper heat shield
Lower side heat insulation piece of 24dB water inlet and outlet
25 inner pipe
26 insertion body
26a helical projection
27 flow path of refrigerant
27a refrigerant inlet connection pipe (refrigerant inlet part)
27b refrigerant outlet connecting pipe (refrigerant outlet)
27c refrigerant return connection pipe
28 water flow path
28a Water inlet pipe (Water inlet)
28b Water outlet connecting pipe (Water outlet)
28c Water Return connection pipe
29 vacuum insulation
Detailed Description
The heat pump heat source machine according to claim 1 is characterized by comprising: a refrigerant circuit in which a refrigerant circulates through pipes, and the refrigerant circuit is formed by connecting a compressor, a refrigerant flow path of a water-refrigerant heat exchanger, a pressure reducing device, and an evaporator in an annular shape by the pipes; a blower device that generates air that passes through the evaporator; and a bottom plate on which the evaporator is placed, the water-refrigerant heat exchanger being covered with a heat insulator, the water-refrigerant heat exchanger having a water inlet portion, a water outlet portion, and a heat exchange portion where water exchanges heat with the refrigerant, the water inlet portion and the water outlet portion of the water-refrigerant heat exchanger being supported by a support portion of the heat insulator, and a gap being provided between the heat exchange portion and an inner surface of the heat insulator.
Accordingly, the water inlet portion and the water outlet portion of the water-refrigerant heat exchanger are supported by the inner surface of the heat insulator, and a gap is provided between the heat exchange portion of the water-refrigerant heat exchanger, in which water and refrigerant exchange heat, and the inner surface of the heat insulator covering the water-refrigerant heat exchanger, whereby the refrigerant flow path through which high-temperature refrigerant flows does not contact the inner surface of the heat insulator, and therefore a heat pump heat source unit having a water-refrigerant heat exchanger in which the durability of the heat insulator covering the water-refrigerant heat exchanger is improved can be provided.
The invention according to claim 2 is characterized in that, in particular, in the invention according to claim 1, the water-refrigerant heat exchanger is disposed on the bottom plate in a state of being covered with the heat insulator.
This enables stable fixation even if the weight of the water-refrigerant heat exchanger covered with the heat insulator is slightly large.
The invention according to claim 3 is characterized in that, in particular, in the invention according to claim 1 or 2, the thickest part of the heat insulator located above the water-refrigerant heat exchanger is formed at a position facing the heat exchange portion.
Thus, the thickness of the portion of the water-refrigerant heat exchanger facing the high-temperature heat exchange portion is greater than the thickness of the heat insulator located above the low-temperature water inlet portion and the heat-released refrigerant outlet portion of the water-refrigerant heat exchanger, and thus a heat pump heat source unit having a water-refrigerant heat exchanger in which heat release loss from the high-temperature heat exchange portion is efficiently suppressed can be provided.
The invention according to claim 4 is characterized in that, in particular, in the invention according to claim 2, a maximum thickness of a portion of the heat insulator facing an upper side of the heat exchange portion is larger than a maximum thickness of a portion of the heat insulator facing a lower side of the heat exchange portion.
Thus, even if the heat insulator on the upper side of the water-refrigerant heat exchanger is cooled by the air generated by the air blowing device and having passed through the evaporator, the heat exchange portion of the water-refrigerant heat exchanger is less likely to be cooled because the maximum thickness of the heat insulator of the water-refrigerant heat exchanger facing the upper side of the heat exchange portion is greater than the maximum thickness of the heat insulator of the water-refrigerant heat exchanger facing the lower side of the heat exchange portion. As a result, even if the heat exchange portion of the water-refrigerant heat exchanger is disposed on the downstream side of the air flow of the evaporator, the heat pump heat source unit having the water-refrigerant heat exchanger in which the heat radiation loss is suppressed can be provided.
The feature of the invention 5 is that, in particular, in the invention 2, the heat insulator is divided at least in the vertical direction, and the density of the heat insulator on the upper side is made higher than that of the heat insulator on the lower side.
Thus, even if the heat insulator on the upper side of the water-refrigerant heat exchanger is cooled by the air generated by the air blowing device and having passed through the evaporator, since the heat insulator covering the water-refrigerant heat exchanger is divided at least in the vertical direction, the density of the heat insulator on the upper side is higher than that of the heat insulator on the lower side, and the water-refrigerant heat exchanger is not easily cooled. As a result, even if the water-refrigerant heat exchanger is disposed on the downstream side of the air flow of the evaporator, it is possible to provide the heat pump heat source unit having the water-refrigerant heat exchanger in which the heat radiation loss is suppressed.
The 6 th invention is characterized in that, in particular, in any one of the 1 st to 5 th inventions, a vacuum heat insulator is used at least on an outer surface of the heat insulator facing the heat exchange portion.
Thus, by using the vacuum heat insulator having a thermal conductivity of about 1/10 made of the foamed heat insulator on the outer surface of the heat insulator facing the heat exchange portion of the water-refrigerant heat exchanger, it is possible to provide a heat pump heat source unit having a water-refrigerant heat exchanger in which heat radiation loss is suppressed even if the thickness of the heat insulator of the heat exchange portion in which the water and the refrigerant of the water-refrigerant heat exchanger exchange heat is made as thin as possible and the water-refrigerant heat exchanger is disposed on the downstream side of the air flow of the evaporator.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiment.
(embodiment mode)
Fig. 1(a) is a top internal view of a heat pump heat source unit according to an embodiment of the present invention, and fig. 1(b) is a front internal view of the heat pump heat source unit according to the embodiment of the present invention.
Fig. 4 is a circuit diagram of a water heater using a heat pump heat source unit according to an embodiment of the present invention.
First, a fluid circuit diagram of a water heater will be described below with reference to fig. 4. The heat pump heat source unit 1 heats tap water. The heat pump heat source unit 1 heats water, and the tank unit 2 stores high-temperature water transported via the pipe 3, mixes the stored high-temperature water with tap water, and supplies hot water at a predetermined temperature.
The heat pump heat source unit 1 includes: a compressor 4 for compressing a refrigerant at high temperature and high pressure; a water-refrigerant heat exchanger 5 that radiates heat of the refrigerant to water; a pressure reducing device 6 as an expansion valve; and an evaporator 7, which is an air-refrigerant heat exchanger that absorbs heat from air. The air blower 9 is an air blower fan that generates air passing through the evaporator 7.
The compressor 4, the water-refrigerant heat exchanger 5, the pressure reducing device 6, and the evaporator 7 are sequentially connected in an annular shape via pipes, thereby forming a refrigerant circuit 8 as a closed circuit. The refrigerant circuit 8 is a heat pump that circulates a refrigerant while changing the refrigerant between a high temperature-high pressure and a low temperature-low pressure. In the water-refrigerant heat exchanger 5, the water flowing through the water-refrigerant heat exchanger 5 is heated by the high-pressure side refrigerant circulating through the refrigerant circuit 8, and high-temperature water is generated.
On the other hand, the hot water supply cycle 10 configured in the tank unit 2 includes a hot water storage tank 12 that stores high-temperature water generated by the water-refrigerant heat exchanger 5, an inlet pipe 13, a hot water supply pipe 15, a circulation pump 16, and the like; a water inlet pipe 13 for introducing tap water into the hot water storage tank 12; a hot water supply pipe 15 for supplying high-temperature water from the hot water storage tank 12 to a hot water supply terminal 14 of a faucet or a shower head; and a circulation pump 16 for transporting the low-temperature water in the hot water storage tank 12 to the water-refrigerant heat exchanger 5 in order to heat the low-temperature water in the hot water storage tank 12 to generate high-temperature water.
Fig. 1(a) and 1(b) show the arrangement of the components shown in the circuit diagram of the water heater of fig. 4.
Next, the arrangement structure of the constituent members will be described in more detail with reference to fig. 1(a) and 1 (b).
The bottom plate 11, the right plate 20 forming the right side, the left plate 21 forming the left side, the top plate 22 forming the upper side, and the front plate 23 forming the front side are exterior bodies forming the outer contour of the heat pump heat source unit 1. A front plate 23 as the exterior body has an air outlet 23 a. The air outlet 23a and the air blowing device 9 are concentric.
The interior of the exterior of the heat pump heat source unit 1 is divided into left and right sides by a partition plate 17 in front view. The compressor 4 and the decompression device 6 are disposed in a right space of the partition plate 17 when viewed from the front, that is, in a space on one side of the partition plate 17.
Further, the evaporator 7 is disposed in a space on the left side of the partition plate 17 when viewed from the front, that is, in a space on the other side of the partition plate 17. The evaporator 7 is disposed in the rearmost of the other side space and the leftmost of the other side space. Further, an air blower 9 is disposed on the front side of the evaporator 7. A part of the blower 9 is supported by the evaporator 7. The blower 9 generates air that passes through the evaporator 7 in order to absorb heat from the refrigerant flowing through the evaporator 7.
Further, the water-refrigerant heat exchanger 5 covered with the heat insulator 24 is placed on the bottom plate 11 located below the blower 9. The heat insulator 24 is divided at least in the vertical direction, and includes an upper heat insulator 24a and a lower heat insulator 24 b. Therefore, the lower heat insulator 24b is disposed on the bottom plate 11.
On the other hand, the air generated by the blower 9 absorbs heat from the refrigerant flowing through the evaporator 7 when passing through the evaporator 7. The air then hits the heat insulator 24 covering the water-refrigerant heat exchanger 5, and is blown out from the air outlet 23a formed in the front plate 23.
At this time, although the air generated by the blower 9 hits the heat insulator 24 covering the water-refrigerant heat exchanger 5, the lower heat insulator 24b is placed on the bottom plate 11, and therefore, the air hits the upper heat insulator 24a more than the lower heat insulator 24 b.
Next, a water-refrigerant heat exchanger of a heat pump heat source unit and a heat insulator covering the water-refrigerant heat exchanger according to an embodiment of the present invention will be described with reference to fig. 2. Fig. 2 is a main-part side sectional view of the water-refrigerant heat exchanger of the heat pump heat source unit according to the embodiment of the present invention.
First, the water-refrigerant heat exchanger 5 will be described. The 1 st fluid such as water flows through the inner tube 25. An insertion body 26 is inserted into the inner tube 25. A spiral protrusion 26a is formed on the insert 26, and the spiral protrusion 26a abuts against the inner surface of the inner tube 25.
Therefore, the 1 st fluid such as water flows through the spiral water channel 28 formed by the inner surface of the inner tube 25, the outer surface of the insert 26, and the inclined surface of the spiral projection 26 a. On the other hand, the refrigerant flow path 27 as a refrigerant pipe is wound in a spiral shape on the outer periphery of the inner pipe 25. The 2 nd fluid such as the refrigerant flows through the refrigerant flow path 27.
As shown in fig. 2, the 1 st fluid such as water flowing through the water flow path 28 and the 2 nd fluid such as a refrigerant flowing through the refrigerant flow path 27 flow in a manner facing each other. The 2 nd fluid such as a high-temperature refrigerant flowing through the refrigerant passage 27 heats the 1 st fluid such as low-temperature water flowing through the water passage 28 to generate high-temperature water. Carbon dioxide gas is preferably used as the 2 nd fluid, and high-temperature water can be generated by using carbonic acid gas.
Therefore, as shown in fig. 2, a water inlet connection pipe 28a is connected to one end of the water flow path 28. The water inlet connection pipe 28a is a water inlet portion communicating with the water flow path 28. Above the water inlet connection pipe 28a, a refrigerant outlet connection pipe 27b is disposed. The refrigerant outlet connection pipe 27b is a refrigerant outlet portion connected to the refrigerant flow path 27.
On the other hand, a water outlet connection pipe 28b is connected to the other end of the water channel 28. The water outlet connection pipe 28b is a water outlet portion that communicates with the water flow path 28. Further, a refrigerant inlet connection pipe 27a is disposed above the water outlet connection pipe 28 b. The refrigerant inlet connection pipe 27a is a refrigerant inlet connected to the refrigerant flow path 27.
Further, a heat exchange portion 5a is provided between the refrigerant inlet connection pipe 27a and the water outlet connection pipe 28 b. In the heat exchange portion 5a, the 2 nd fluid such as the refrigerant heats the 1 st fluid such as water.
That is, in the heat exchange portion 5a, the 1 st fluid such as water flowing through the spiral water flow path 28 formed by the inner surface of the inner tube 25, the outer surface of the insertion body 26, and the inclined surface of the spiral convex portion 26a exchanges heat with the 2 nd fluid such as refrigerant flowing through the refrigerant flow path 27 which is a spiral refrigerant tube wound around the outer periphery of the inner tube 25, and the 1 st fluid such as water is heated by the 2 nd fluid such as refrigerant.
The temperature of the refrigerant inlet connection pipe 27a may exceed 100 ℃ because it is the discharge temperature of the compressor 4. On the other hand, since the water as the 1 st fluid having exchanged heat with the refrigerant flows through the water inlet connection pipe 28a and the water outlet connection pipe 28b, the water temperature of the water inlet connection pipe 28a and the water outlet connection pipe 28b is lower than the refrigerant temperature.
Therefore, the refrigerant outlet connection pipe 27b is arranged at a distance above the water inlet connection pipe 28a, and the refrigerant inlet connection pipe 27a is arranged at a distance above the water outlet connection pipe 28 b.
In fig. 2, 3, 5, and 6, the solid line indicates the flow direction of the 2 nd fluid such as the refrigerant, and the broken line indicates the flow direction of the 1 st fluid such as water.
Next, the heat insulator will be described. The heat insulator 24 is divided at least vertically, has an upper heat insulator 24a and a lower heat insulator 24b, and covers the water-refrigerant heat exchanger 5 from above and below. Therefore, the lower heat insulator 24b is placed on the bottom plate 11.
The upper heat insulator 24a has a refrigerant outlet side upper heat insulator 24cA positioned above the refrigerant outlet connection pipe 27b on one end side, a refrigerant inlet side upper heat insulator 24dA positioned above the refrigerant inlet connection pipe 27a on the other end side, and a heat exchange unit upper heat insulator 24aA positioned above the heat insulator second support 24bB between the refrigerant outlet side upper heat insulator 24cA and the refrigerant inlet side upper heat insulator 24 dA.
The lower heat insulator 24b has a water inlet side lower heat insulator 24cB positioned below the water inlet connection pipe 28a on one end side thereof, a water outlet side lower heat insulator 24dB positioned below the water outlet connection pipe 28b on the other end side thereof, and a heat exchange portion lower heat insulator 24aB positioned below the heat exchange portion 5a between the water inlet side lower heat insulator 24cB and the water outlet side lower heat insulator 24 dB.
Further, a heat insulator first support portion 24bA is provided between the water inlet side lower heat insulator 24cB and the heat exchange portion lower heat insulator 24aB in the longitudinal direction (lateral direction) which is the flow direction of the 1 st fluid such as water in the lower heat insulator 24 b. Further, a second heat insulator support portion 24bB is provided between the heat exchange portion lower heat insulator 24aB and the water inlet/outlet side lower heat insulator 24dB in the longitudinal direction (lateral direction) which is the flow direction of the 1 st fluid such as water in the lower heat insulator 24 b.
The water inlet connection pipe 28a of the water-refrigerant heat exchanger 5 is supported from below by the heat insulator first support portion 24bA, and the water outlet connection pipe 28b of the water-refrigerant heat exchanger 5 is supported from below by the heat insulator second support portion 24 bB. Gaps are provided between the heat exchange portion 5a and the inner surface of the upper heat insulator 24a, and between the heat exchange portion 5a and the inner surface of the lower heat insulator 24 b. That is, a gap is provided between the heat exchange portion 5a and the inner surface of the surrounding heat insulator 24.
Thus, the heat exchange portion 5a having the refrigerant flow path 27 through which the high-temperature refrigerant flows does not contact the inner surfaces of the upper and lower heat insulators 24a and 24b, that is, the heat exchange portion 5a and the inner surfaces of the surrounding heat insulators 24, and therefore, the inner surfaces of the upper and lower heat insulators 24a and 24b can be prevented from being deformed. Therefore, the heat insulator 24 can stably maintain the arrangement position of the water-refrigerant heat exchanger 5 for a long period of time.
Although styrene foam is mainly used for the upper and lower heat insulators 24a and 24b, styrene foam generally has a heat resistance temperature of about 70 to 80 ℃, and may soften or melt when heated to a temperature higher than this temperature. The heat-resistant polystyrene foam having a high heat-resistant temperature can be developed by changing the raw materials depending on the application, but even in this case, the heat-resistant temperature is about 90 ℃.
Here, since the temperature of the refrigerant inlet connection pipe 27a is the discharge temperature of the compressor 4, there is a case where it exceeds 100 ℃. Therefore, as shown in fig. 2, a gap is also provided between the high-temperature refrigerant inlet connection pipe 27a and the inner surface of the upper heat insulator 24 a. Since the refrigerant inlet connection pipe 27a is not in contact with the upper heat insulator 24a, the durability of the upper heat insulator 24a can be improved.
As shown in fig. 2, the last portion of the upper heat insulator 24a is formed at a position facing the heat exchange portion 5 a.
Specifically, the thickness of the heat exchange unit upper heat insulator 24aA facing the high-temperature heat exchange unit 5a (t1) is greater than the thickness of the refrigerant outlet side upper heat insulator 24cA positioned above the low-temperature water inlet connection pipe 28a and the refrigerant outlet connection pipe 27b after heat dissipation (t2), and therefore, heat dissipation loss from the high-temperature heat exchange unit 5a can be effectively suppressed.
Further, the low-temperature water inlet connection pipe 28a is connected to the same side of the water-refrigerant heat exchanger 5 in a flow-to-flow relationship with the heat-radiated refrigerant outlet connection pipe 27 b.
Furthermore, since the water-refrigerant heat exchanger 5 covered with the heat insulator 24 is placed on the bottom plate 11, even if the upper heat insulator 24a of the water-refrigerant heat exchanger 5 is cooled by the air generated by the blower 9 and having passed through the evaporator 7, the heat loss from the high-temperature heat exchange portion 5a can be effectively suppressed. As a result, even if the water-refrigerant heat exchanger 5 is disposed on the downstream side of the evaporator 7 with respect to the air flow, the heat pump heat source unit 1 having the water-refrigerant heat exchanger 5 in which the heat radiation loss is suppressed can be provided.
As shown in fig. 2, the maximum thickness (t1) of the upper side heat insulator 24a of the heat insulator 24, which is opposite to the upper side of the heat exchange portion 5a, is formed to be larger than the maximum thickness (t3) of the lower side heat insulator 24b of the heat insulator 24, which is opposite to the lower side of the heat exchange portion 5 a.
Thus, since the water-refrigerant heat exchanger 5 covered with the heat insulator 24 is placed on the bottom plate 11, even if the upper heat insulator 24a of the water-refrigerant heat exchanger 5 is cooled by the air generated by the blower 9 and having passed through the evaporator 7, the maximum thickness of the upper heat insulator 24a opposed to the upper side of the heat exchange portion 5a of the water-refrigerant heat exchanger 5 is larger than the maximum thickness of the lower heat insulator 24b opposed to the lower side of the heat exchange portion 5a of the water-refrigerant heat exchanger 5, and therefore the heat exchange portion 5a of the water-refrigerant heat exchanger 5 is difficult to be cooled. As a result, even if the water-refrigerant heat exchanger 5 is disposed on the downstream side of the evaporator 7 with respect to the air flow, the heat pump heat source unit 1 having the water-refrigerant heat exchanger 5 in which the heat radiation loss is suppressed can be provided.
Fig. 3 is a main portion upper sectional view of another water-refrigerant heat exchanger of the heat pump heat source machine of the embodiment of the invention. In fig. 3, only the portions different from the structure shown in fig. 2 will be described.
In fig. 3, the plurality of water-refrigerant heat exchangers 5 (2 in the present embodiment) are configured such that water as the 1 st fluid and the refrigerant as the 2 nd fluid flow in series through the plurality of water-refrigerant heat exchangers 5.
Specifically, a refrigerant return connection pipe 27c and a water return connection pipe 28c are provided at one end of the plurality of water-refrigerant heat exchangers 5 so that the refrigerant can flow into the next water-refrigerant heat exchanger 5 after the water as the 1 st fluid and the refrigerant as the 2 nd fluid pass through the first water-refrigerant heat exchanger 5.
On the other end side of the plurality of water-refrigerant heat exchangers 5, a pair of water inlet connection pipes 28a and refrigerant outlet connection pipes 27b are further connected to a pair of water outlet connection pipes 28b and refrigerant inlet connection pipes 27 a.
In this case, the water inlet connection pipe 28a and the water outlet connection pipe 28b of the water-refrigerant heat exchanger 5 are supported from below by the heat insulator second support portion 24 bB.
In the plurality of water-refrigerant heat exchangers 5, the water return connection pipe 28c corresponding to the water inlet portion and the water outlet portion is supported from the lower side by the heat insulator first support portion 24 bA.
Fig. 5 is a sectional view of a main portion of another water-refrigerant heat exchanger of the heat pump heat source unit according to the embodiment of the present invention. In fig. 5, only a portion different from the structure shown in fig. 2 will be described.
In fig. 5, the density of the upper insulator 24a is made higher than that of the lower insulator 24 b. The heat insulating performance can be improved by increasing the density of the upper heat insulators 24 a.
Thus, since the water-refrigerant heat exchanger 5 covered with the heat insulator 24 is placed on the bottom plate 11, even if the upper heat insulator 24a of the water-refrigerant heat exchanger 5 is cooled by the air generated by the air blowing device 9 and having passed through the evaporator 7, the water-refrigerant heat exchanger 5 is difficult to be cooled because the heat insulator 24 covering the water-refrigerant heat exchanger 5 is divided at least in the vertical direction, and the density of the upper heat insulator 24a is higher than that of the lower heat insulator 24 b. As a result, even if the water-refrigerant heat exchanger 5 is disposed on the downstream side of the evaporator 7 with respect to the air flow, the heat pump heat source unit 1 having the water-refrigerant heat exchanger 5 in which the heat radiation loss is suppressed can be provided.
Fig. 6 is a sectional view of a main portion of another water-refrigerant heat exchanger of the heat pump heat source unit according to the embodiment of the present invention. In fig. 6, only a portion different from the structure shown in fig. 2 will be described.
At least the outer surface of the heat insulator of the upper heat insulator 24a facing the heat exchange portion 5a is provided with a vacuum heat insulator 29.
By using the vacuum heat insulator 29 having a thermal conductivity of about 1/10 made of a foamed heat insulating material on the outer surface of the upper heat insulator 24a facing the heat exchange portion 5a of the water-refrigerant heat exchanger 5, the heat pump heat source unit 1 having the water-refrigerant heat exchanger 5 in which heat loss is suppressed can be provided even when the water-refrigerant heat exchanger 5 is disposed on the downstream side of the air flow of the evaporator 7, particularly, even if the thickness of the heat insulator of the heat exchange portion 5a in which water and refrigerant of the water-refrigerant heat exchanger 5 exchange heat is as thin as possible.
Industrial applicability of the invention
As described above, the heat pump heat source unit according to the present invention is applicable to a heat pump heating system such as a water heater or a hot water heating system because it has a water-refrigerant heat exchanger in which heat loss is suppressed even when the water-refrigerant heat exchanger is disposed downstream of the evaporator in the air flow.
Claims (6)
1. A heat pump heat source machine characterized by comprising:
a refrigerant circuit in which a refrigerant circulates in pipes, the refrigerant circuit being formed by connecting a compressor, a refrigerant flow path of a water-refrigerant heat exchanger, a pressure reducing device, and an evaporator in a ring shape by the pipes;
a blower device that generates air that passes through the evaporator; and
a bottom plate on which the evaporator is mounted,
the water-refrigerant heat exchanger is covered by insulation,
the water-refrigerant heat exchanger has a water inlet portion, a water outlet portion, and a heat exchange portion where water exchanges heat with the refrigerant,
the water inlet portion and the water outlet portion of the water-refrigerant heat exchanger are supported by the support portion of the heat insulator,
a gap is provided between the heat exchanging portion and an inner surface of the heat insulator.
2. The heat pump heat source machine according to claim 1, characterized in that:
the water-refrigerant heat exchanger is disposed on the bottom plate in a state of being covered with the heat insulator.
3. The heat pump heat source machine according to claim 1 or 2, characterized in that:
the thickest part of the heat insulator located above the water-refrigerant heat exchanger is formed at a position facing the heat exchange unit.
4. The heat pump heat source machine according to claim 2, characterized in that:
the maximum thickness of a portion of the heat insulator facing the upper side of the heat exchange unit is greater than the maximum thickness of a portion of the heat insulator facing the lower side of the heat exchange unit.
5. The heat pump heat source machine according to claim 2, characterized in that:
the heat insulator is divided at least in the vertical direction, and the density of the heat insulator on the upper side is higher than the density of the heat insulator on the lower side.
6. The heat pump heat source machine according to any one of claims 1 to 5, characterized in that:
a vacuum heat insulator is used at least on an outer surface of the heat insulator facing the heat exchange portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-077003 | 2019-04-15 | ||
| JP2019077003A JP7233024B2 (en) | 2019-04-15 | 2019-04-15 | heat pump heat source machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111829174A true CN111829174A (en) | 2020-10-27 |
Family
ID=69526136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010095179.9A Pending CN111829174A (en) | 2019-04-15 | 2020-02-14 | Heat pump heat source machine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3726152A1 (en) |
| JP (1) | JP7233024B2 (en) |
| CN (1) | CN111829174A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005221088A (en) * | 2004-02-03 | 2005-08-18 | Matsushita Electric Ind Co Ltd | Heat pump type water heater |
| JP2007285611A (en) * | 2006-04-18 | 2007-11-01 | Daikin Ind Ltd | Heat pump type hot water supplier |
| JP2016085002A (en) * | 2014-10-28 | 2016-05-19 | ダイキン工業株式会社 | Outdoor unit |
| CN108139025A (en) * | 2015-07-13 | 2018-06-08 | 大宇造船海洋株式会社 | The method of liquefied gas storage slot and arrangement isolation component with isolation component |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3931878B2 (en) | 2003-11-19 | 2007-06-20 | 松下電器産業株式会社 | Heat pump type heat source device |
| JP2011133149A (en) * | 2009-12-24 | 2011-07-07 | Panasonic Corp | Heat pump type heat source device and heat pump water heater using the same |
| JP5527113B2 (en) | 2010-08-31 | 2014-06-18 | パナソニック株式会社 | Heat pump heat source machine |
| JP2013221643A (en) | 2012-04-13 | 2013-10-28 | Hitachi Appliances Inc | Liquid storage unit, and water heater |
| JP6229146B2 (en) * | 2013-05-08 | 2017-11-15 | パナソニックＩｐマネジメント株式会社 | Hot water generator |
| JP2015001326A (en) * | 2013-06-14 | 2015-01-05 | パナソニックＩｐマネジメント株式会社 | Hot-water generation device |
| JP6249271B2 (en) | 2013-08-27 | 2017-12-20 | 株式会社ノーリツ | Heat pump water heater |
-
2019
- 2019-04-15 JP JP2019077003A patent/JP7233024B2/en active Active
-
2020
- 2020-02-07 EP EP20156000.0A patent/EP3726152A1/en active Pending
- 2020-02-14 CN CN202010095179.9A patent/CN111829174A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005221088A (en) * | 2004-02-03 | 2005-08-18 | Matsushita Electric Ind Co Ltd | Heat pump type water heater |
| JP2007285611A (en) * | 2006-04-18 | 2007-11-01 | Daikin Ind Ltd | Heat pump type hot water supplier |
| JP2016085002A (en) * | 2014-10-28 | 2016-05-19 | ダイキン工業株式会社 | Outdoor unit |
| CN108139025A (en) * | 2015-07-13 | 2018-06-08 | 大宇造船海洋株式会社 | The method of liquefied gas storage slot and arrangement isolation component with isolation component |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7233024B2 (en) | 2023-03-06 |
| JP2020176733A (en) | 2020-10-29 |
| EP3726152A1 (en) | 2020-10-21 |
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Application publication date: 20201027 |