JP5673638B2 - Heat source unit and hot water supply system - Google Patents

Description

  The present invention relates to a heat source unit and a hot water supply system.

  Conventionally, as a heat source unit, there exists what was described in Unexamined-Japanese-Patent No. 2010-14368 (patent document 1). The heat source unit includes a bottom frame that receives drain water, and a water heat exchanger and an air heat exchanger that are disposed on the bottom frame.

  By the way, when the conventional heat source unit is used at a low temperature, there is a problem that drain water in the bottom frame freezes. Therefore, it is conceivable to provide a heater on the bottom frame to prevent the drain water from freezing.

  However, since the water heat exchanger is covered with the foam heat insulating material, there is a problem that the foam heat insulating material melts when the heater contacts the foam heat insulating material.

JP 2010-14368 A

  Then, the subject of this invention is providing the heat-source unit and hot-water supply system which do not degrade the heat insulating material which covers a water heat exchanger with the heat of a heater.

In order to solve the above problems, the heat source unit of the present invention is:
A bottom frame that receives drain water;
A water heat exchanger disposed on the bottom frame;
A heat insulating material covering the water heat exchanger;
It is arranged on the side of the heat insulating material, and includes a heater for preventing the drain water from freezing,
The heater is
A horizontal portion of the heat generation area;
A rising portion of a non-heat-generating region,
The heater is characterized in that the rising portion contacts the side surface of the heat insulating material and is supported by the side surface of the heat insulating material.

  Here, the said horizontal part means the part extended substantially parallel with respect to a bottom frame, and may contain the part which inclines with respect to a bottom frame partially. The rising portion refers to a portion extending so as to be substantially orthogonal to the bottom frame.

  According to the heat source unit of the present invention, since the rising portion of the non-heat generating area of the heater is in contact with the side surface of the heat insulating material, the heat insulating material is not deteriorated by the heat of the heater.

  Further, since the rising portion of the heater is supported by the side surface of the heat insulating material, the heater is restrained in the horizontal direction by the heat insulating material. Thereby, the wobbling of the heater in the horizontal direction can be prevented, and the horizontal portion of the heat generating region can be prevented from contacting the heat insulating material.

  In one embodiment, the heat source unit includes a support member that is positioned between the horizontal portion of the heater and the bottom frame and supports the heater.

  According to the heat source unit of this embodiment, the support member is positioned between the horizontal portion of the heater and the bottom frame to support the heater, so that the heater is restrained in the vertical direction by the support member. Thereby, the wobbling of the heater in the vertical direction can be prevented, and the contact of the horizontal portion with the heat insulating material can be more reliably prevented.

In the heat source unit of one embodiment,
On the side surface of the heat insulating material, a recess extending in the vertical direction is provided,
The rising portion of the heater contacts the inner surface of the recess.

  According to the heat source unit of this embodiment, the rising portion of the heater contacts the recessed portion in the vertical direction of the heat insulating material, so that the heater is restrained in the horizontal direction by the recessed portion. Thereby, the wobbling of the heater in the horizontal direction can be more reliably prevented, and the contact of the horizontal portion with the heat insulating material can be further reliably prevented.

In the hot water supply system of one embodiment,
The heat source unit;
A hot water storage tank for storing hot water heated by the heat source unit.

  According to the hot water supply system of this embodiment, since the heat source unit is provided, durability can be improved.

  According to the heat source unit of the present invention, the heater does not deteriorate the heat insulating material due to the heat of the heater because the rising portion contacts the heat insulating material and is supported by the heat insulating material.

  According to the hot water supply system of the present invention, since the heat source unit is provided, durability can be improved.

It is a simplified lineblock diagram showing the hot-water supply system of one embodiment of the present invention. It is a front view of a heat source unit. It is AA sectional drawing of FIG. It is a top view of a heat source unit. It is the enlarged view seen from the back side of B section of FIG. It is CC sectional drawing of FIG.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a simplified configuration diagram showing a hot water supply system according to an embodiment of the present invention. As shown in FIG. 1, the hot water supply system includes a heat source unit 1 and a hot water storage tank 2 that stores hot water heated by the heat source unit 1.

The heat source unit 1 includes a compressor 13, a water heat exchanger 8 (condenser), an expansion valve (decompression mechanism) 14, and an air heat exchanger (evaporator) 15. The compressor 13, the water heat exchanger 8, the expansion valve 14, and the air heat exchanger 15 are connected in order via the refrigerant passage 16. For example, a CO ₂ refrigerant is used as the refrigerant. A fan 20 and a motor 21 that drives the fan 20 are arranged facing the air heat exchanger 15.

  Connected to the bottom of the hot water storage tank 2 is one water inlet passage 5a branched from the water supply passage 5 connected to the water supply source E. Thereby, the city water supplied from the water supply source E is introduce | transduced into the bottom part of the hot water storage tank 2 via the inflow channel 5a. One end of the circulation path 6 is connected to the bottom of the hot water storage tank 2. A circulation pump 7 and the water heat exchanger 8 are connected to the circulation path 6.

  The other end of the circulation path 6 is connected to the top of the hot water storage tank 2. A mixing valve 11 is connected to the top of the hot water storage tank 2 through a hot water discharge path 12. The mixing valve 11 is connected to the other incoming water flow path 5 b branched from the water supply flow path 5 and the hot water supply terminal T. Thereby, the hot water discharged from the top of the hot water storage tank 2 can be mixed with the water supplied from the water supply source E, and hot water at a desired temperature can be supplied at the hot water supply terminal T.

  In the hot water supply system configured as described above, when the compressor 13 and the circulation pump 7 are driven, the water in the hot water storage tank 2 flows through the circulation path 6 from the bottom of the hot water storage tank 2. At this time, the water flowing through the circulation path 6 is heated (boiled up) by the water heat exchanger 8 and returned to the top of the hot water storage tank 2. By continuously performing such an operation, hot hot water can be stored in the hot water storage tank 2. Hot water in the hot water storage tank 2 is supplied to the hot water supply terminal T.

  FIG. 2 shows a front view of the heat source unit. FIG. 3 is a cross-sectional view taken along the line AA in FIG. As shown in FIGS. 2 and 3, the heat source unit 1 includes a casing 30, and the casing 30 includes a ceiling panel (not shown), a front panel (not shown), a side panel 31, and a bottom frame 32. FIG. 2 shows a state where the ceiling panel and the front panel are removed.

  A partition plate 33 arranged in the vertical direction is provided inside the casing 30, and the inside of the casing 30 is partitioned into a compressor chamber 30 a and a heat exchanger chamber 30 b on the left and right by the partition plate 33. ing. A compressor 13 and an expansion valve 14 (not shown) are arranged in the compressor chamber 30a. The compressor 13 is covered with a cover member 35.

  A water heat exchanger 8, an air heat exchanger 15, a fan 20, and a motor 21 are disposed in the heat exchanger chamber 30b. The water heat exchanger 8 is covered with a heat insulating material 36. The air heat exchanger 15 is formed in a substantially L shape in plan view, and is exposed from the side surface and the rear surface of the casing 30. The motor 21 is supported by the air heat exchanger 15 via the mounting base 30.

  FIG. 4 shows a simplified plan view of the heat source unit. In FIG. 4, the refrigerant pipe and the water pipe are omitted.

  As shown in FIG. 4, the bottom frame 32 receives drain water such as condensed water generated in the air heat exchanger 15. The bottom frame 32 is provided with a drain hole 32a in the vicinity of the rear end side (the rear surface side of the casing 30). The drain hole 32 a is located immediately below the air heat exchanger 15. The drain water is discharged from the drain hole 32a.

  The water heat exchanger 8 is disposed on the bottom frame 32, and a heater 40 is disposed on the side of the heat insulating material 36 that covers the water heat exchanger 8. The heat insulating material 36 is made of, for example, expanded polystyrene. The heater 40 is a sheathed heater, for example.

  The heater 40 is formed in a substantially L shape in plan view, and is disposed immediately below the substantially L-shaped air heat exchanger 15. The heater 40 faces substantially the entire area of the lower surface of the air heat exchanger 15 in plan view. Most of the heater 40 is separated from the upper surface of the bottom frame 32 in a non-contact manner.

  The condensed water that has dropped from the air heat exchanger 15 comes into contact with the heater 40 and is heated to reach the bottom frame 32. The condensed water reaching the bottom frame 32 is discharged to the outside from the drain hole 32a. Thus, the heater 40 prevents the drain water of the bottom frame 32 from freezing.

  FIG. 5 is an enlarged view of the portion B in FIG. 4 as seen from the rear side. As shown in FIGS. 4 and 5, the heater 40 includes an outward path portion 41 extending from the rear end side of the bottom frame 32 along the side edge side, and a side end of the bottom frame 32 folded back from the forward path portion 41. And a return path portion 42 extending from the side along the rear end side. The forward path portion 41 is located inside the bottom frame 32 with respect to the return path portion 42.

  At both end portions of the heater 40, rising portions 41 a and 42 a extending so as to be substantially orthogonal to the bottom frame 32 are provided. That is, the forward path portion 41 has a rising portion 41 a at the start end portion, and the return path portion 42 has a rising portion 42 a at the end portion. A power connector (not shown) is connected to both ends of the heater 40.

  Horizontal portions 41 b and 42 b extending so as to be substantially parallel to the bottom frame 32 are provided at portions excluding both end portions of the heater 40. That is, the horizontal portion 41 b is provided in a portion excluding the start end portion of the forward path portion 41, and the horizontal portion 42 b is provided in a portion excluding the end portion of the return path portion 42. The horizontal portion 41 b of the forward path portion 41 is at a higher position than the horizontal portion 42 b of the return path portion 42.

  The horizontal portions 41b and 42b are heat generation regions that generate heat, and the rising portions 41a and 42a are non-heat generation regions that do not generate heat.

  The horizontal portions 41 b and 42 b face the lower surface of the air heat exchanger 15 in a plan view and do not protrude from the lower surface of the air heat exchanger 15. On the other hand, the rising portions 41 a and 42 a face the side surface of the air heat exchanger 15.

  The horizontal portions 41 b and 42 b are separated from the side surface of the heat insulating material 36. On the other hand, the rising portions 41 a and 42 a are in contact with the side surface of the heat insulating material 36, and the heater 40 is supported by the side surface of the heat insulating material 36. That is, a concave portion 36a extending in the vertical direction is provided on the side surface of the heat insulating material 36, and the rising portions 41a and 42a are in contact with the inner surface of the concave portion 36a. The inner surface of the recess 36a is formed in an arc shape.

  A contacted portion 361 of the heat insulating material 36 with which the rising portions 41a and 42a come into contact is connected below the partition plate 33 (see FIG. 2), and a partition wall that partitions the compressor chamber 30a and the heat exchanger chamber 30b. Become.

  FIG. 6 is a cross-sectional view taken along the line CC of FIG. As shown in FIGS. 4 to 6, a plurality of support members 50 are provided below the heater 40. The support member 50 is positioned between the lower horizontal portion 42 b of the heater 40 and the bottom frame 32 and supports the heater 40. The support member 50 is made of a heat-resistant elastic body.

  More specifically, the bottom frame 32 includes a bottom portion 321 and a peripheral wall portion 322 erected on the peripheral edge of the bottom portion 321. The support member 50 has a seat portion 50a and a back portion 50b. The seat portion 50 a is located between the horizontal portion 42 b of the heater 40 and the bottom portion 321 of the bottom frame 32. The back portion 50 b is located between the horizontal portion 42 b of the heater 40 and the peripheral wall portion 322 of the bottom frame 32.

  According to the heat source unit 1 configured as described above, since the rising portions 41 a and 42 a of the non-heat generating region of the heater 40 are in contact with the side surfaces of the heat insulating material 36, the heat insulating material 36 is not deteriorated by the heat of the heater 40. .

  Further, since the rising portions 41 a and 42 a of the heater 40 are supported by the side surfaces of the heat insulating material 36, the heater 40 is restrained in the horizontal direction by the heat insulating material 36. Thereby, the wobbling of the heater 40 in the horizontal direction can be prevented, and the horizontal portions 41b and 42b of the heat generating region can be prevented from contacting the heat insulating material 36.

  Further, since the support member 50 is positioned between the horizontal portion 42 b of the heater 40 and the bottom frame 32 and supports the heater 40, the heater 40 is restrained in the vertical direction by the support member 50. Thereby, the wobbling of the heater 40 in the vertical direction can be prevented, and the contact of the horizontal portions 41b and 42b with the heat insulating material 36 can be more reliably prevented.

  Further, since the rising portions 41a and 42a of the heater 40 come into contact with the concave portion 36a in the vertical direction of the heat insulating material 36, the heater 40 is restrained in the horizontal direction by the concave portion 36a. Thereby, the wobbling of the heater 40 in the horizontal direction can be more reliably prevented, and the contact of the horizontal portions 41b and 42b with the heat insulating material 36 can be further reliably prevented.

  According to the hot water supply system configured as described above, since the heat source unit 1 is provided, durability can be improved.

  In addition, this invention is not limited to the above-mentioned embodiment. For example, in the above embodiment, the heater 40 has a single rod shape, but may have a structure divided into a plurality of parts. At this time, each rising part of the divided members may be in contact with the side surface of the heat insulating material 36.

  In the above embodiment, the support member 50 supports the lower horizontal portion 42b. However, the support member 50 may support the higher horizontal portion 41b. Moreover, although the supporting member 50 has the back part 50b, only the seat part 50a may be sufficient.

  In the above embodiment, the inner surface of the recess 36a of the heat insulating material 36 has an arc shape in which both the rising portions 41a and 42a are in contact, but may be a fitting groove into which the rising portions 41a and 42a are fitted.

  In the said embodiment, although the hot water storage tank 2 was one, it is good also as two or more. Moreover, the increase / decrease in the quantity of the supporting member 50 is free. Further, the support member 50 may be omitted, and the recess 36a of the heat insulating material 36 may be omitted.

DESCRIPTION OF SYMBOLS 1 Heat source unit 2 Hot water storage tank 8 Water heat exchanger 13 Compressor 14 Expansion valve 15 Air heat exchanger 20 Fan 32 Bottom frame 32a Drain hole 36 Heat insulating material 36a Concave part 361 Contacted part 40 Heater 41 Outward part 42 Return part 41a, 42a Rising part 41b, 42b Horizontal part 50 Support member

Claims (4)

A bottom frame (32) for receiving drain water;
A water heat exchanger (8) disposed on the bottom frame (32);
A heat insulating material (36) covering the water heat exchanger (8);
A heater (40) disposed on the side of the heat insulating material (36) for preventing the drain water from freezing;
The heater (40)
A horizontal portion (41b, 42b) of the heat generation area;
A rising portion (41a, 42a) of the non-heat generation region,
The heat source unit, wherein the heater (40) is supported by the side surface of the heat insulating material (36), with the rising portions (41a, 42a) contacting the side surface of the heat insulating material (36). The heat source unit according to claim 1,
A heat source unit comprising a support member (50) positioned between the horizontal portion (41b, 42b) of the heater (40) and the bottom frame (32) for supporting the heater (40). The heat source unit according to claim 1 or 2,
On the side surface of the heat insulating material (36), a concave portion (36a) extending in the vertical direction is provided,
The heat source unit, wherein the rising portions (41a, 42a) of the heater (40) are in contact with the inner surface of the recess (36a). The heat source unit (1) according to any one of claims 1 to 3,
A hot water supply system comprising a hot water storage tank (2) for storing hot water heated by the heat source unit (1).

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