JP5264564B2 - Hot water supply outdoor unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot-water supply outdoor unit capable of stably keeping good adhesion between a compressor and water piping while suppressing an increase in costs, being inexpensive with high operational efficiency, having high reliability, further improving operational efficiency and reliability, and suppressing an increase in vibration and noise. <P>SOLUTION: In this hot water supply outdoor unit 1 including a refrigerant circuit constituted by annularly connecting a compressor 2, a warm water-refrigerant heat exchanger 3, an expansion valve 4 and an air heat exchanger 5, and heating the water in a water storage tank 14 by the warm water-refrigerant heat exchanger 3, a bottom water piping heat exchanger 6 connected between the warm water-refrigerant heat exchanger 3 and the water storage tank 14, and exchanging heat by being brought into contact with the bottom 2a of the compressor 2, is disposed on the bottom 2a. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a hot water supply outdoor unit, and more particularly to an improvement in a water pipe that exchanges heat with a compressor provided in the hot water supply outdoor unit.

  The conventional hot water supply outdoor unit is attached with a water pipe wound in a spiral manner in close contact with the outer periphery of the compressor side surface, so that the heat of the compressor is given to the boiling water, and the heating capacity and hot water outdoor unit The operating efficiency is increased, and the temperature of the compressor is further lowered to increase the reliability of the compressor (see, for example, Patent Document 1).

JP 2002-372318 A (page 3-4, FIG. 1)

  The conventional hot-water supply outdoor unit described in Patent Document 1 has a water pipe firmly attached to the outer periphery of the side surface of the compressor. Since the water pipe must be pressed against the side surface of the compressor with another part such as a band, the assemblability is deteriorated and the cost is remarkably increased. Further, the temperature of the lubricating oil at the bottom of the compressor cannot be lowered sufficiently.

  In addition, if the water pipe is in close contact with the compressor, the vibration of the compressor is transmitted to the water pipe and propagates to the heat exchanger, housing, etc., causing the hot water outdoor unit vibration and noise generation. . The water pipe is usually larger in diameter and stiffer than the refrigerant pipe, so the amount of reduction in low frequency is particularly small compared to the refrigerant pipe, and its vibration is transmitted to the heat exchanger, housing, etc. Low frequency vibration and noise will increase.

  The present invention has been made in order to solve the above-described problems. While suppressing an increase in cost, it can stably maintain a good adhesion between a compressor and a water pipe for a long period of time, and is inexpensive. An object of the present invention is to provide a hot water supply outdoor unit equipped with a compressor having high operational efficiency and high reliability.

  It is another object of the present invention to provide a hot water supply outdoor unit that increases the operation efficiency of the hot water supply outdoor unit and the reliability of the compressor, and suppresses an increase in vibration and noise.

A hot water supply outdoor unit according to the present invention includes a refrigerant circuit in which a compressor, a hot water refrigerant heat exchanger, an expansion valve, and an air heat exchanger are connected in an annular shape, and heats the water in the water storage tank by the hot water refrigerant heat exchanger. a water heater outdoor unit to the bottom of the compressor, is connected between the water tank the hot water-refrigerant heat exchanger, the bottom water pipe heat exchanger for exchanging heat provided in contact with the bottom, the water pipe heat exchanger The bottom of the compressor is formed in a substantially hemispherical shape, and the bottom of the compressor is pressed against the water pipe heat exchanger by the weight of the compressor and comes into contact with the bottom water pipe. A mount member having an anti-vibration mount is attached to the heat exchanger to support the compressor .

  According to the present invention, the bottom of the compressor is pressed against the bottom water pipe heat exchanger by the weight of the compressor, and the bottom of the compressor and the bottom water pipe heat exchanger are stably stable for a long time while suppressing an increase in cost. Therefore, it is possible to obtain a hot water supply outdoor unit equipped with a compressor that is inexpensive, has high operation efficiency, and is highly reliable.

It is a schematic diagram which shows the structure of the hot water supply outdoor unit which concerns on Embodiment 1 of this invention. It is a side view which shows the attachment state of the compressor of the hot water supply outdoor unit which concerns on Embodiment 1, and a bottom part water piping heat exchanger. FIG. 3 is a bottom view of FIG. 2. It is the side view and bottom view of the bottom water piping heat exchanger of FIG.

Embodiment 1 FIG.
In FIG. 1 according to Embodiment 1, a hot water supply outdoor unit 1 includes a compressor 2, a hot water refrigerant heat exchanger 3 formed by joining a refrigerant pipe 3a and a water pipe 3b, an expansion valve 4, an air heat exchanger 5, The refrigerant pipe 3a and the expansion valve 4 of the compressor 2, the hot water refrigerant heat exchanger 3 are connected by the high-pressure refrigerant pipe 9, and the expansion valve 4, the air heat exchanger 5, and the compressor 2 are connected. Are connected by a low-pressure refrigerant pipe 10 to constitute a refrigerant circuit. The bottom water piping heat exchanger 6 is in contact with the bottom of the compressor 2.

  A hot water refrigerant heat exchanger inlet water pipe 11 and a hot water refrigerant heat exchanger outlet water pipe 12 are connected to the water pipe 3 b of the hot water refrigerant heat exchanger 3, and a bottom water pipe provided at the bottom of the compressor 2. A hot water heat exchanger outlet water pipe 12 and an outlet connection water pipe 13 are connected to the heat exchanger 6.

  A hot water storage tank 14 is provided outside the hot water supply outdoor unit 1, a low temperature water pipe 16 is connected to the lower part of the hot water outdoor unit 1 via a running water pump 15, and a high temperature water pipe 17 is connected to the upper part. The low temperature water pipe 16 and the high temperature water pipe 17 are connected to the hot water supply outdoor unit 1 by an inlet water pipe 11 of the hot water refrigerant heat exchanger 3 and an outlet connection water pipe 13 of the bottom water pipe heat exchanger 6.

Next, the attachment state of the compressor 2 and the bottom water piping heat exchanger 6 of the hot water supply outdoor unit 1 will be described with reference to FIGS.
The bottom 2a of the compressor 2 is formed in, for example, a substantially hemispherical shape or a shape close thereto, and the bottom water pipe heat exchanger 6 is attached in contact with the outer periphery of the bottom 2a of the compressor 2. In this bottom water pipe heat exchanger 6, the water pipe is formed in a spiral shape by, for example, spirally reducing the diameter downward, and the bottom 2 a of the compressor 2 is inserted from the enlarged diameter side.

  A plate-like mount member 7 is attached to the bottom water pipe heat exchanger 6 by welding, and a vibration-proof mount 8 made of an elastic material such as rubber is attached to the mount member 7 so that the hot water supply outdoor unit 1 is attached. The base 1a is installed. The mount member 7 has a polygonal planar shape such as a triangle, for example, and vibration-proof mounts 8 are attached to three corners. A support hole 7a is formed at the center of the mount member 7, and the reduced diameter portion of the bottom water pipe heat exchanger 6 is inserted and supported. A hot water refrigerant heat exchanger outlet water pipe 12 is connected to the lower part (mounting member 7 side) of the bottom water pipe heat exchanger 6, and an outlet connecting water pipe 13 is connected to the upper part (compressor 2 side). The lower side of the bottom water pipe heat exchanger 6 is located below the support hole 7 a of the mount member 7 and is connected to the hot water refrigerant heat exchanger outlet water pipe 12.

  In the above description, the anti-vibration mount 8 is attached to the bottom water pipe heat exchanger 6 via the mount member 7, but the anti-vibration mount 8 may be directly attached to the bottom water pipe heat exchanger 6.

Next, the operation will be described.
When the running water pump 15 of FIG. 1 is driven, the low temperature water in the hot water storage tank 14 passes through the low temperature water pipe 16, passes through the hot water refrigerant heat exchanger inlet water pipe 11, and flows into the water pipe 3 b of the hot water refrigerant heat exchanger 3. To do. When the compressor 2 is driven, the high-temperature and high-pressure refrigerant from the compressor 2 flows into the refrigerant pipe 3 a of the hot water refrigerant heat exchanger 3. In this way, in the hot water refrigerant heat exchanger 3, the heat of the high-temperature refrigerant from the compressor 2 is given to the low-temperature water flowing into the water pipe 3b from the hot-water refrigerant heat exchanger inlet water pipe 11, and heat exchange is performed. Water is produced. The high-pressure refrigerant that has heated the water in the hot-water refrigerant heat exchanger 3 flows into the expansion valve 4, is depressurized to a predetermined pressure by its opening, and the temperature is also lowered. The low-temperature and low-pressure refrigerant from the expansion valve 4 is given heat from the air by the air heat exchanger 5 and returns to the compressor 2.

  The high temperature water generated in the hot water refrigerant heat exchanger 3 passes through the hot water refrigerant heat exchanger outlet water pipe 12 and flows into the bottom water pipe heat exchanger 6. This high temperature water is given heat from the bottom 2a of the compressor 2 by the bottom water pipe heat exchanger 6, and the temperature further rises, passes through the high temperature water pipe 17 from the outlet connection water pipe 13, and returns to the hot water storage tank 14. The bottom 2a of the compressor 2 is cooled by the high temperature water that has passed through the water pipe heat exchanger 6, and the temperature is lowered.

  According to Embodiment 1, the bottom 2a of the compressor 2 is brought into contact with the bottom water pipe heat exchanger 6 so that the bottom 2a of the compressor 2 is pressed against the bottom water pipe heat exchanger 6 by the weight of the compressor 2. As a result, when the bottom 2a of the compressor 2 and the bottom water pipe heat exchanger 6 are in close contact with each other, there is no need to press the water pipe against the side of the compressor with a separate part such as a band as in the prior art, and it is stable for a long time. And good adhesion can be maintained.

  And since the bottom part 2a of the compressor 2 and the bottom part water pipe heat exchanger 6 are excellent in adhesiveness, both heat exchange efficiency becomes high, and the temperature rise amount of high temperature water becomes large. The heating capacity can be increased while suppressing, and the operation efficiency of the hot water supply outdoor unit 1 is increased. Further, the amount of temperature decrease at the bottom 2a of the compressor 2 is increased, and the lubricating oil at the bottom of the compressor 2 is cooled, so that the sliding portion such as a bearing can be used even during high load operation when the compressor 2 is at a high temperature. It is possible to suppress the occurrence of seizure due to oil film breakage due to a decrease in the viscosity of the lubricating oil, and to suppress the deterioration of the quality and performance of the lubricating oil during long-term use, thereby improving the reliability of the compressor.

  1 Hot water supply outdoor unit, 1a base, 2 compressor, 2a bottom, 3 hot water refrigerant heat exchanger, 3a refrigerant piping, 3b water piping, 4 expansion valve, 5 air heat exchanger, 6 bottom water piping heat exchanger, 7 mount Member, 7a support hole, 8 vibration-proof mount, 9 high-pressure refrigerant pipe, 10 low-pressure refrigerant pipe, 11 hot water refrigerant heat exchanger inlet water pipe, 12 hot water refrigerant heat exchanger outlet water pipe (on the outlet side of the hot water refrigerant heat exchanger) Water piping), 13 outlet connection water piping, 14 hot water storage tank, 15 running water pump, 16 low temperature water piping, 17 high temperature water piping.

Claims (1)

A hot water supply outdoor unit comprising a refrigerant circuit in which a compressor, a hot water refrigerant heat exchanger, an expansion valve, and an air heat exchanger are connected in an annular shape, and heats water in a water storage tank by the hot water refrigerant heat exchanger,
A bottom water pipe heat exchanger connected between the hot water refrigerant heat exchanger and a water storage tank and exchanging heat in contact with the bottom is provided at the bottom of the compressor ,
The water pipe heat exchanger is formed in a spiral shape with a reduced diameter downward,
The bottom of the compressor is formed in a substantially hemispherical shape,
The bottom of the compressor is pressed against and contacted with the water pipe heat exchanger by the weight of the compressor,
A hot water supply outdoor unit, wherein a mounting member having an anti-vibration mount is attached to the bottom water pipe heat exchanger to support the compressor .

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