JP2009008363A - Heat pump water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems of causing a heat radiating loss by generation of natural convection, being insufficient in the sound insulating effect by a clearance and being easily transmitting vibration of a compressor to a base when a high rigidity heat insulating material with rubber directly contacts with the base, since the clearance is generated between the projecting-recessed bases and between the upper heat insulating materials, in the heat insulating material wound on the outer periphery of a compressor body and a suction muffler, in a conventional heat pump water heater. <P>SOLUTION: The heat pump water heater is constituted by arranging the heat insulating material wound on the outer periphery of the compressor body and the suction muffler on the heat insulating material, by arranging the heat insulating material of a flexible structure on a base upper surface of the compressor periphery. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to heat insulation and sound insulation of a compressor of a heat pump type hot water heater.

  In a heat source device of a conventional heat pump water heater, a compressor leg is fixed to a pin fixed to a base via a vibration isolating rubber or the like. The compressor body is connected to a suction muffler, a discharge pipe, a suction pipe, a terminal cover, and lead wires. A heat insulating material is disposed on the outer periphery of the compressor main body and the suction muffler, and a heat insulating material is also disposed on the upper portion of the compressor main body and the suction muffler.

  However, according to the configuration of the heat insulation of the compressor of the conventional heat pump water heater, the base of the outdoor unit is drawn to ensure strength and drainage, and has a concavo-convex shape in which a plurality of convex portions or concave portions are formed. When the heat insulating material is disposed on the outer periphery of the compressor main body and the suction muffler provided on the base, a gap is formed between the compressor main body and the base. In addition, since the discharge pipe, suction pipe, terminal cover, and lead wires are arranged at the upper part of the compressor body, there is also a gap between the upper heat insulating material and the heat insulation material arranged on the outer periphery of the compressor body and the suction muffler. It was the structure which can be made easily.

  In addition, Patent Documents 1 and 2 propose a configuration related to heat insulation of a compressor. Patent Document 1 shows that a heat insulating material is sandwiched between a cylinder block in a compressor shell and a suction muffler.

  Patent Document 2 discloses a double shell structure that has an elastic mounting at the bottom of a sealed container to suppress vibration and noise.

JP 2000-291556 (FIG. 1) JP-A-2004-237906 (FIG. 1)

  In the case of the configuration of heat insulation of the compressor of the conventional heat pump water heater, the gap is easily formed as described above. If such a gap is formed, natural convection is likely to occur and the heat insulation effect is reduced. there were. Further, there is a problem that the sound insulation effect against the sound emitted from the compressor is reduced due to the gap.

Furthermore, the heat insulating material arranged on the outer periphery of the compressor body and the suction muffler has a structure in which rubber is attached to the felt in order to increase the sound insulation effect. However, since the rubber is in contact with the base, the compressor body Is transmitted to the base via a heat insulating material disposed on the outer periphery of the compressor body and the suction muffler, and there is a problem that noise from the panel or the like becomes large.

  In addition, since the compressor body in the high temperature part and the suction muffler in the low temperature part are located in the vicinity during operation, the heat that should be used for hot water supply leaks to the low temperature suction muffler due to heat transfer from the compressor body to the suction muffler. There was a problem of loss.

  The present invention has been made to solve these problems. It reduces heat loss from the compressor body and improves efficiency, and improves the sound insulation effect of noise from the compressor body and the suction muffler. It aims at providing the heat pump water heater which can make noise.

The heat pump water heater of the present invention has a configuration in which a heat insulating material having a flexible structure is disposed on the upper surface of the base around the compressor, and a heat insulating material wound around the outer periphery of the compressor body and the suction muffler is disposed on the heat insulating material. Is.

  In the heat pump water heater of the present invention, a heat insulating material having a flexible structure is provided on the upper surface of the base around the compressor, and a sealed space can be formed around the compressor by the heat insulating material wound around the main body of the compressor and the heat insulating material above the compressor. Therefore, heat loss from the compressor main body can be significantly reduced, and noise from the compressor main body can be insulated to reduce noise.

Embodiment 1 FIG.
1 is a piping system diagram showing a refrigeration cycle circuit and a hot water supply circuit according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing the configuration of the heat source unit 12 according to Embodiment 1 of the present invention. In FIG. 1, the heated gas refrigerant that has become high temperature and high pressure by the compressor 2 flows into the hot water supply heat exchanger 3. The water taken into the heat source unit by the pump 9 on the hot water supply circuit 8 side is heat-exchanged and heated when passing through the hot water supply water heat exchanger 3. On the other hand, the refrigerant that has transferred heat to the water is decompressed by the throttle valves 4a and 4b, flows into the evaporator 5, absorbs heat from the air blown by the blower 7, is evaporated and reheated by the internal heat exchanger 6, Return to the compressor 2. In the internal heat exchanger 6, the refrigerant flowing from the outlet of the evaporator 5 to the compressor 2 and the refrigerant flowing from the outlet of the hot water supply heat exchanger 3 to the evaporator 5 exchange heat. The flow rate of the high-pressure refrigerant flowing from the outlet of the hot water supply heat exchanger 3 to the internal heat exchanger 6 is adjusted by the flow rate adjusting valves 4a and 4b. For example, carbon dioxide is used as the refrigerant of the refrigeration cycle.

In FIG. 2, the hot water supply heat source unit 12 is provided with a storage room 13 for storing a hot water supply heat exchanger 3 (not shown) at the bottom, and a blower room 15 provided with a fan 7 at the upper part of the storage room 13. The machine room 14 is adjacent to the blower room 15 and is partitioned by a partition plate 16. The machine room 14 is provided with a suction muffler provided on the suction side of the compressor together with the compressor 2, and an electrical component 17 is disposed above the machine room 14. Reference numeral 18 denotes a base to which the compressor main body is fixed. The base 18 is drawn to ensure strength and drainage, and has a convex or concave shape having a plurality of convex portions or concave portions having a height difference of about 1 cm. 19 is a front panel, 20 is a back panel, 21 is a top panel, 22 is a service panel, and 23 is a blow grill. In the blower chamber 15, the evaporator 5 is provided from the surface adjacent to the blow-out grill 23 to the opposite surface, and heat exchange between the refrigerant and the air is performed by blowing air from the fan 7.

On the other hand, FIG. 8 shows the heat insulation structure of the compressor of the conventional heat pump water heater. The base 18 of the outdoor unit is drawn to ensure strength and drainage, and has an uneven shape. In addition, in order to improve the sound insulation effect, the heat insulating material 36 is a structure in which a sound insulation member such as a sheet rubber is bonded to a flexible heat insulation member such as felt.
When the heat insulating material 36 is disposed on the outer periphery of the main body of the compressor 2 and the suction muffler 31 provided on the base 18, a gap A is formed between the main body of the compressor 2 and the base 18. Further, since the discharge pipe 32, the suction pipe 33, the terminal cover 34 and the lead wire 35 are arranged at the upper part of the compressor 2 main body, they are arranged on the outer periphery of the upper heat insulating material 37, the compressor 2 main body and the suction muffler 31. The gap A was easily formed between the heat insulating material 36 and the heat insulating material 36.

  In the case of the compressor heat insulation configuration of the conventional heat pump water heater, the gap A is easily formed as described above. The compressor 2 vibrates due to torque fluctuations of the rotating body, unbalanced rotating body, and refrigerant pressure pulsation generated inside during operation, and when carbon dioxide is used as the refrigerant, the temperature rises at a high pressure. However, if the gap A is formed as described above, there is a problem that natural convection easily occurs and the heat insulating effect is reduced. Moreover, the sound insulation effect with respect to the radiated sound from the compressor 2 is also reduced by the gap A.

  On the other hand, it is conceivable to process the lower end portion of the heat insulating material 36 according to the shape of the base surface so that there is no gap, but the work becomes complicated at the time of assembly, and the position of the heat insulating material 36 is compressed by vibration during operation of the compressor. Displacement in the circumferential direction of the machine may result in a gap, which cannot be adopted.

Further, when the sound insulation member 36b having high rigidity is in contact with the base 18 (B in FIG. 8), the vibration of the main body of the compressor 2 is passed through the member 36b disposed on the outer periphery of the main body of the compressor 2 and the suction muffler 31. The noise is transmitted to the base 18 and the noise from the panel or the like is increased.

  FIG. 3 shows the heat insulation configuration of the compressor of the heat pump water heater in Embodiment 1 of the present invention. In the main body of the compressor 2, a compressor leg 39 is fixed to a pin 38 fixed to the base 18 via an anti-vibration rubber (not shown). A heat insulating material 41 having a flexible structure is disposed on the upper surface of the base 18 around the compressor, and a heat insulating material 36 wound around the outer periphery of the compressor body 2 and the suction muffler 31 is disposed on the heat insulating material 41. The heat insulating material 36 has a two-layer structure of a flexible heat insulating member 36a such as felt and a sound insulating member 36b made of rubber having high rigidity, and the outer periphery of the compressor body 2 and the suction muffler 31 so that the sound insulating member 36b is on the outer peripheral side. It is wrapped around This is because when the highly rigid sound insulation member 36b directly hits the compressor main body 2 and the suction muffler 31, noise is generated when the water heater is operated, and the flexible heat insulating member 36a is flexible so that the vibration of the compressor is not transmitted to the sound insulation member 36b. What is necessary is just to have. The heat insulating material 41 having a flexible structure is a highly flexible member such as a soft urethane foam having a sponge-like structure. The heat insulating material 41 is in close contact with the unevenness of the base 18 and absorbs the step, thereby compressing the compressor body 2 and the suction muffler 31. The gap with the heat insulating material 36 wound around the outer periphery is prevented. Further, the heat insulating material 37 above the compressor main body 2 and the suction muffler 31 is disposed so as to be fitted inside the heat insulating material 36 wound around the outer periphery of the compressor main body 2 and the suction muffler 31.

  Further, the heat insulating material 41 having a flexible structure prevents the sound insulating member 36b of the heat insulating material 36 wound around the outer periphery of the compressor body 2 and the suction muffler 31 from directly contacting the base 18, and the sound insulating member 36b vibrates the compressor 2. Is transmitted to the base 18 by its flexibility. Further, a heat insulating material 42 is disposed between the compressor body 2 and the suction muffler 31.

  Therefore, by arranging the heat insulating material 41 having a flexible structure on the upper surface of the base 18 around the compressor in this manner, the gap between the heat insulating materials is eliminated and a sealed structure is formed, so that the occurrence of natural convection can be prevented. Largely, the efficiency of the heat pump type hot water heater can be improved. In addition, the sound insulation effect can be improved. Further, since the heat insulating material 41 having a flexible structure can prevent the vibration of the compressor from being transmitted to the base 18 through the sound insulation member 36b having high rigidity, it is possible to reduce noise. Furthermore, heat transfer from the compressor body 2 to the suction muffler 31 can be reduced by the heat insulating material 42 between the compressor body 2 and the suction muffler 31, so that the efficiency is improved.

Embodiment 2. FIG.
FIG. 4 shows the heat insulation configuration of the compressor of the heat pump water heater in Embodiment 2 of the present invention. The heat insulating material 36 wound around the outer periphery of the compressor main body 2 and the suction muffler 31 and the heat insulating material 42 between the compressor main body 2 and the suction muffler 31 are integrated. A heat insulating material 42 is inserted between the compressor body 2 and the suction muffler 31, wound around the outer periphery of the compressor body 2 and the suction muffler 31, and fixed with a hook-and-loop fastener 43.

  Since the heat insulating material 36 wound around the outer periphery of the compressor main body 2 and the suction muffler 31 and the heat insulating material 42 between the compressor main body 2 and the suction muffler 31 are integrated, the cost can be reduced and the assemblability can be improved.

Embodiment 3 FIG.
FIG. 5 shows the heat insulation configuration of the compressor of the heat pump water heater in Embodiment 3 of the present invention. In addition to the first embodiment of the present invention, the heat insulating material 37 of the compressor 2 main body and the suction muffler 31 is arranged in double on the inner side and the outer side of the heat insulating material 36 wound around the outer periphery of the compressor 2 main body and the suction muffler 31. It is. The inner heat insulating material 37 has an outer periphery shorter than the inner periphery of the heat insulating material 36 wound around the outer periphery of the compressor 2 main body and the suction muffler 31, and is arranged at a position lower than the upper end portion of the heat insulating material 36 in height. . In addition, the outer heat insulating material 37 is positioned above the inner heat insulating material 37, has an outer periphery longer than or equivalent to the outer periphery of the heat insulating material 36, and is disposed so as to be in contact with the upper end portion of the heat insulating material 36.

By adopting such a configuration, the gap for passing the discharge pipe 32, the suction pipe 33, and the lead wire 35 disposed in the upper part of the compressor body 2 can be reduced, so that the sealing performance is further improved. The heat insulation effect is increased and the sound insulation effect can be improved.

Embodiment 4 FIG.
FIG. 6 shows the heat insulation configuration of the compressor of the heat pump water heater in Embodiment 4 of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals. The refrigeration circuit configuration other than the heat insulating structure of the compressor is the same as that of the first embodiment.
In the main body of the compressor 2, a compressor leg 39 is fixed to a pin 38 fixed to the base 18 via an anti-vibration rubber (not shown). Although the heat insulating material 41a is arranged on the upper surface of the base 18 around the compressor, in the fourth embodiment, the heat insulating material 41a uses a relatively rigid component 41b on the upper side, and the lower side in contact with the base 18 has a sponge shape. A structural member 41c such as a flexible urethane foam having a structure is used. The constituent member 41c has a flexibility that can absorb unevenness on the base 18, and is more flexible than at least the constituent member 41b. As will be described later, the component member 41b is provided for facilitating the positioning of the heat insulating material 41a on the base 18 at the time of assembly. The component member 41b has higher rigidity than the lower component member 41c. It is sufficient if the rigidity is high enough to enable positioning without causing the position on the base to be displaced. The constituent member 41b can also be made of a material such as flexible urethane foam.

A heat insulating material 36c wound around the outer periphery of the compressor body 2 and the suction muffler 31 is disposed on the heat insulating material 41a, that is, on the upper rigid component 41b. The heat insulating material 36c has a sandwich-like configuration in which both sides of a sound insulating member 36d such as rubber having high rigidity are sandwiched between flexible heat insulating members 36e and 36f such as felt. However, the sound insulating member 36d does not exist in the portion that contacts the lower heat insulating material 41a, and only the heat insulating members 36e and 36f are flexible.

The heat insulating material 41a having a flexible structure absorbs the unevenness of the base 18 and prevents a gap between the heat insulating material 36c wound around the compressor body 2 and the suction muffler 31. Further, the heat insulating material 37 above the compressor main body 2 and the suction muffler 31 is disposed so as to be fitted inside the heat insulating material 36c wound around the outer periphery of the compressor main body 2 and the suction muffler 31.

Further, the heat insulating material 41 a having a flexible structure prevents the sound insulating member 36 d of the heat insulating material 36 c wound around the outer periphery of the compressor body 2 and the suction muffler 31 from directly contacting the base 18. Further, the portion where the heat insulating material 36c is in contact with the heat insulating material 41a is not provided with the sound insulating member 36d having high rigidity, and only the heat insulating members 36e and 36f having high flexibility are in contact with each other. Since sound is not transmitted through direct contact, the sound insulation effect can be further enhanced. The heat insulating members 36e and 36f have flexibility, and this flexibility can prevent the vibration of the compressor 2 from being transmitted to other members in contact.
In addition to this configuration, even if the heat insulating material 36 has a two-layer structure of the flexible heat insulating member 36a and the highly rigid sound insulating member 36b as in the first embodiment, the sound insulating member 36b having a high rigidity in the lower portion of the heat insulating material. The flexible heat insulating member 36a is configured to be longer, and when contacting with the heat insulating material 41a, the flexible heat insulating member 36a is arranged to bend outward so that the highly sound-insulating member 36b is directly insulated from the heat insulating material 36a. It can also be set as the structure which does not contact 41a.

  In addition, the reason why the heat insulating material 41a has the two-layer structure of the highly rigid structural member 41b and the flexible structural member 41c is to facilitate the positioning of the heat insulating material 41a on the base 18. FIG. 7 is a schematic view of the positional relationship between the heat insulating material 41a and the compressor 2 on the base 18 of the machine room 14 as viewed from above. As shown in the figure, the compressor 2 has a substantially triangular leg 39 on the base 18, and is fixed to a pin 38 fixed to the base 18 via an anti-vibration rubber. The heat insulating material 41a has a hole portion hollowed out so as to surround the periphery of the pin 38, and before the compressor 2 is attached, the heat insulating material 41a is attached to the base 18 so that the pin 38 is surrounded by the hole portion. Cover the top and then install the compressor 2. In FIG. 7, the heat insulating material 41 a is in contact with the entire length of the two outer sides of the base 18, and is in contact with the two sides that are respectively opposed to the two sides, but is not limited to such a shape. The shape may be formed so as to be in contact with the outer periphery of 18 at least at three positions apart from each other and can be easily positioned at the time of assembly. Further, as described above, since the constituent member 41b is made of a material having a relatively high rigidity, it is possible to avoid a situation in which the lower constituent member 41c is parted and protrudes from the base 18 and is inconvenient for assembly. .

  In this way, by arranging the heat insulating material 41 having a flexible structure on the upper surface of the base 18 around the compressor, the gap between the heat insulating materials is eliminated and a sealed structure is formed, so that natural convection can be prevented and the heat insulating effect is increased. In addition, the sound insulation effect can be improved. Moreover, since the vibration of the compressor can be prevented from being transmitted to the base 18 via the sound insulation member 36b such as rubber having high rigidity by the heat insulating members 36e and 36f and the heat insulating material 41, noise reduction can be measured. Furthermore, heat transfer from the compressor body 2 to the suction muffler 31 can be reduced by the heat insulating material 42 between the compressor body 2 and the suction muffler 31, so that the efficiency is improved.

  In any of the above embodiments, examples of the compressor provided with the suction muffler have been described. However, the heat insulating structure of the compressor according to the first, third, and fourth embodiments also applies to the compressor not provided with the suction muffler. Needless to say, you can.

  In any of the above embodiments, when used in a refrigeration cycle using carbon dioxide as a refrigerant, natural convection is likely to occur when the compressor has a high pressure, the temperature rises greatly, and there is a gap at the bottom of the compressor. . Therefore, it is possible to prevent the occurrence of natural convection by arranging a heat insulating material at the lower part of the compressor as in the present invention and eliminating a gap between the heat insulating material wound around the compressor side part, Since the heat from the heat source having the highest temperature can be prevented from being discarded for the heat pump type hot water heater, the efficiency can be further improved.

It is a piping system diagram which shows the refrigerant circuit and hot water supply circuit in Embodiment 1 of this invention. It is a figure which shows the structure of the heat-source equipment unit in Embodiment 1 of this invention. It is a figure which shows the heat insulation structure of the compressor of the heat pump water heater in Embodiment 1 of this invention. It is a figure which shows the heat insulation structure of the compressor of the heat pump water heater in Embodiment 2 of this invention. It is a figure which shows the heat insulation structure of the compressor of the heat pump water heater in Embodiment 3 of this invention. It is a figure which shows the heat insulation structure of the compressor of the heat pump water heater in Embodiment 4 of this invention. It is a schematic diagram which shows the positional relationship of the heat insulating material arrange | positioned on the base in Embodiment 4 of this invention, and a compressor. It is a figure which shows the heat insulation structure of the compressor of the conventional heat pump water heater.

Explanation of symbols

1 refrigerant circuit, 2 compressor body, 3 hot water supply heat exchanger throttle 5 evaporator 6 internal heat exchanger 7 blower 8 water circuit 9 pump 10 three-way valve 11 tank 12 heat source unit 13 hot water supply heat exchanger storage chamber 14 machine Chamber 15 Blower chamber 16 Partition plate, 17 Electrical component 18 Base 19 Front panel,
20 Back panel 21 Top panel 22 Service panel
23 Outlet grill, 31 Suction muffler, 32 Discharge pipe, 33 Suction pipe,
34 Terminal cover, 35 Lead wire,
36a Insulating member (felt), 36b Insulating member (rubber),
36c heat insulation material, 36d heat insulation material (rubber),
36e, 36f Thermal insulation member (felt) 37 Upper thermal insulation material,
38 Pin fixed to base, 39 Compressor leg, 41 Insulation,
41a heat insulating material, 41b highly rigid component, 41c highly flexible component,
42 Heat insulation material between the compressor body 2 and the suction muffler 31, 43 hook-and-loop fastener

Claims (9)

In a heat pump water heater having a refrigeration cycle configured by sequentially connecting a compressor, a heat exchanger for hot water supply, a throttle valve, and an evaporator, and having a hot water supply heat source device storing the refrigeration cycle,
A base having a convex portion and a concave portion provided with the compressor;
A first heat insulating material disposed on the upper surface of the base around the compressor so as to cover the convex portion or the concave portion and having a flexible structure in close contact with the convex portion or the concave portion;
A heat pump water heater, wherein a second heat insulating material wound around the compressor main body is disposed on the first heat insulating material while maintaining contact with the first heat insulating material without a gap. When the first heat insulating material is disposed in a lower layer portion in contact with the base surface, the first heat insulating material has a first structure member having a flexible structure that can be in close contact with the convex portion or the concave portion of the base, and an upper layer thereof The heat pump water heater according to claim 1, further comprising: a second constituent member having a rigidity higher than that of the first constituent member. The second heat insulating material has a flexible sheet-like sound insulating member that can be wound around a compressor, and the compressor of the sound insulating member when the sound insulating member is wound around the compressor. 3. The apparatus according to claim 1, further comprising two layers of heat insulating members provided on opposing surfaces and having flexibility to prevent vibrations of the compressor from being transmitted to the sound insulating member. The heat pump water heater described in 1. 4. The heat pump water heater according to claim 3, wherein the second heat insulating material is only the heat insulating member without the sound insulating member in a portion in contact with the first heat insulating material without a gap. . The heat pump water heater according to any one of claims 1 to 4, wherein the compressor has a suction muffler, and a heat insulating material is disposed between the compressor body and the suction muffler. The heat pump water heater according to claim 5, wherein a heat insulating material between the compressor main body and the suction muffler and a second heat insulating material wound around the compressor main body are integrated. The heat pump hot water supply according to any one of claims 1 to 4, further comprising a third heat insulating material provided on the compressor body and an upper portion of the suction muffler while maintaining contact with the first heat insulating material. Machine. The heat pump water heater according to claim 1, wherein the third heat insulating material is arranged in a double manner. The heat pump water heater according to any one of claims 1 to 4, wherein the refrigerant flowing through the refrigerant pipe is a carbon dioxide refrigerant.

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