JP2012177545A - Heat pump unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump unit that can prevent adverse effects of electric equipment and the like to the other apparatus when water leakage occurs in a water flow path connecting the outside and a water heat exchanger, and whose maintenance can be performed easily and securely.SOLUTION: The heat pump unit X includes: a water heat exchanger 2 for performing heat exchange between a refrigerant and water; a water circuit 20 for supplying water supplied from outside to the outside passing through the water heat exchanger 2; a compressor 1 for compressing a refrigerant; an air heat exchanger 3 for exchanging heat between the refrigerant and outdoor air; and a refrigerant pipe 6 connecting the compressor 1, the water heat exchanger 2, and the air heat exchanger 3 and having the refrigerant circulated therein. The water heat exchanger 2 is disposed at the bottom part of a heat pump unit X, the water circuit 20 and the compressor 1 are provided adjacent to the water heat excahnger 2, on a side part of the heat pump unit X, and electric equipment 5 for controlling the heat pump unit X is provided at a position above the refrigerant pipe 6.

Description

  The present invention relates to a heat pump unit including a water heat exchanger that performs heat exchange between water and a refrigerant, and more particularly to an internal structure of the heat pump unit.

  A heat pump unit used for a heat pump type hot water heater includes a compressor that compresses a refrigerant, a water heat exchanger that exchanges heat between the refrigerant and water, an expander that expands the refrigerant, and the refrigerant and outdoor air. A heat pump cycle (refrigeration cycle) having an air heat exchanger or the like that performs heat exchange between them is incorporated (see, for example, Patent Document 1). The heat pump unit is provided with a water circuit (water flow path) including piping and a circulation pump for supplying water supplied from the outside to the outside via the water heat exchanger. In the heat pump unit, water in the water circuit is heated by heat exchange with the refrigerant circulating in the heat pump cycle in the water heat exchanger.

  On the other hand, Patent Document 1 proposes to realize space saving by arranging the water heat exchanger below a blower for blowing outdoor air to the air heat exchanger. Further, in Patent Document 1, since the water heat exchanger is provided with a cover, even if a water leak occurs in the water heat exchanger, the water is not limited to electrical equipment that controls the heat pump unit. Will not be adversely affected by splashing.

JP 2005-147467 A

  However, in the configuration of Patent Document 1, since only the water heat exchanger is provided with a cover, when water leaks in the water circuit, the water is transferred to other equipment such as the electrical equipment. There is a problem that it may be scattered and adversely affected.

  Accordingly, the present invention has been made in view of the above circumstances, and the object of the present invention is other than electrical equipment in the case where water leakage occurs on the water flow path connecting the outside and the water heat exchanger. An object of the present invention is to provide a heat pump unit capable of preventing adverse effects on the equipment.

  In order to achieve the above object, the present invention provides a water heat exchanger for exchanging heat between refrigerant and water, and supplying water supplied from the outside to the outside via the water heat exchanger. A water flow path, a compressor that compresses the refrigerant, an air heat exchanger that exchanges heat between the refrigerant and outdoor air, and the compressor, the water heat exchanger, and the air heat exchanger are connected. A heat pump unit including a refrigerant pipe through which the refrigerant is circulated, wherein the water heat exchanger is disposed at a bottom of the heat pump unit, and the water flow path and the compressor are connected to the water heat exchanger. An electrical equipment that is provided on the side of the heat pump unit adjacent to the container and controls the heat pump unit is provided at a position above the refrigerant pipe.

  Moreover, it is desirable to place the compressor on the bottom plate of the heat pump unit. Thereby, since the center of gravity of the heat pump unit is lowered, the stability is good.

  According to the present invention, the above-described object can be achieved, and adverse effects on other equipment such as electrical equipment can be prevented when water leakage or the like occurs.

It is a schematic block diagram of the heat pump unit which concerns on embodiment of this invention, More specifically, it is an external view of the said heat pump unit. It is a schematic block diagram of the heat pump unit which concerns on embodiment of this invention, More specifically, it is an internal structure figure which shows the state which removed the front panel of the said heat pump unit.

  Embodiments of the present invention will be described below with reference to the accompanying drawings for understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, Comprising: It is not the thing of the character which limits the technical scope of this invention.

  1A and 1B are internal configuration diagrams of the heat pump unit X according to the embodiment of the present invention. FIG. 1A is an external view, and FIG. 1B is a state in which the front panel 10a of the heat pump unit X is removed. It is an internal block diagram shown.

As shown in FIG. 1A and FIG. 1B, the heat pump unit X according to the embodiment of the present invention is provided on the compressor 1 that compresses the refrigerant and the bottom of the heat pump unit X, and between the refrigerant and water. A water heat exchanger 2 for exchanging heat in the air, an air heat exchanger 3 for exchanging heat between the refrigerant and the outdoor air, and a blower fan and a drive motor for blowing outdoor air to the air heat exchanger 3 The main body housing 10 includes the blower 4 and the electrical equipment 5 having an electronic circuit for controlling the heat pump unit X as a whole. The heat pump unit X constitutes a heat pump type hot water heater by being connected to a hot water storage tank unit or the like (not shown) having a hot water storage tank for storing hot water heated by the water heat exchanger 2. The refrigerant is, for example, a carbon dioxide refrigerant such as a CO ₂ refrigerant or an HFC refrigerant such as an R410A refrigerant.

  In addition, the heat pump unit X has an external connection port 21 for connecting an external pipe (not shown) for circulating water between the hot water storage tank unit and the like (not shown) provided outside, and an external connection port 21 and a water circuit 20 (an example of a water flow path) for flowing water between the water heat exchanger 2 and the water heat exchanger 2 are provided. The water circuit 20 includes a water pipe 22 and a circulation pump 23 for supplying water supplied from the external connection port 21 to the external connection port 21 after passing through the water heat exchanger 2.

  On the other hand, the compressor 1, the water heat exchanger 2, the air heat exchanger 3, an expander (not shown), and the like are connected by a refrigerant pipe 6 through which refrigerant is circulated, thereby forming a heat pump cycle (refrigeration cycle). .

  In the heat pump cycle, the high-temperature and high-pressure refrigerant compressed and discharged in the compressor 1 is cooled by exchanging heat with water in the water heat exchanger 2 and then expanded in an expander (not shown). Thereafter, the low-temperature and low-pressure refrigerant expanded in the expander (not shown) is heat-exchanged with the outdoor air in the air heat exchanger 3 to absorb heat and vaporize, and then flows into the compressor 1 again. As the refrigerant is circulated in this way, the water flowing into the water heat exchanger 2 from the water circuit 20 is heated to about 65 to 90 ° C. by heat exchange with the refrigerant in the water heat exchanger 2.

  Inside the main body casing 10, a partition plate that partitions the inside of the main body casing 10 into a lower storage chamber 11 in which the water heat exchanger 2 is stored and an upper storage chamber 12 positioned above the lower storage chamber 11. 13 is provided. The partition plate 13 may be the same as the bottom plate 10b of the heat pump unit X.

  In the lower storage chamber 11, a water circuit 20 is stored in addition to the water heat exchanger 2. Here, the external connection port 21 is provided below the back portion of the lower storage chamber 11 in which the water heat exchanger 2 is stored, that is, below the partition plate 13. Thereby, the water circuit 20 can be configured to connect the external connection port 21 and the water heat exchanger 2 without going through the upper storage chamber 12.

  On the other hand, the upper housing chamber 12 accommodates the air heat exchanger 3, the blower 4, the electrical equipment 5, and the like.

  Thus, in the heat pump unit X, the lower storage chamber 11 in which the water heat exchanger 2 and the water circuit 20 are stored is separated from the upper storage chamber 12 by the partition plate 13. Even if a water leak occurs in the heat exchanger 2 or the water circuit 20, the partition plate 13 prevents the water from splashing into the collection chamber 12. Therefore, adverse effects on other devices such as the electrical equipment 5 due to water leakage from the water heat exchanger 2 and the water circuit 20 can be prevented.

  Incidentally, an opening (not shown) for inserting the compressor 1 is formed in the partition plate 13, and the compressor 1 is inserted into an opening (not shown) of the partition plate 13, and the main body housing 10. Is placed on the bottom plate 10b.

  In this manner, by placing the compressor 1 on the bottom plate 10b of the main body housing 10, stability can be ensured by keeping the center of gravity of the heat pump unit X low. Further, since the compressor 1 is not placed on the partition plate 13, high strength is not required for the partition plate 13. It is also conceivable as another example that the partition plate 13 is provided with high strength and the compressor 1 is placed on the partition plate 13.

  At this time, the gap between the opening (not shown) and the compressor 1 is blocked with, for example, a heat insulating material (not shown) to prevent generation of vibration noise between the compressor 1 and the edge of the opening. You can also Further, since the compressor 1 is inserted into the opening (not shown) of the partition plate 13, it is unlikely that water will scatter from the lower storage chamber 11 to the upper storage chamber 12, but the heat insulating material is provided. Thus, scattering of water through the gap between the compressor 1 and the edge of the opening can be prevented.

  The partition plate 13 also serves as a drain pan that receives condensed water (drain water) dripping from the air heat exchanger 3 accommodated in the upper accommodation chamber 12. Thereby, the increase in the number of parts is suppressed. The partition plate 13 and the drain pan may be provided separately.

  A drain port 14 for draining the condensed water of the partition plate 13 (or drain pan) is provided on the back surface 10c of the main body housing 10. The drain port 14 is located at the back of the lower storage chamber 11. Condensed water from the air heat exchanger 3 is drained to the outside through an external pipe (not shown) connected to the drain port 14 via a partition plate 13 that functions as a drain pan.

  Here, conventionally, the air heat exchanger 3 has been provided over the entire region of the main body housing 10 in the height direction so as to secure a heat exchange area as large as possible. Therefore, the drain port 14 cannot be provided on the back surface 10 c of the main body housing 10, and the drain port 14 is provided on the bottom plate 10 b of the main body housing 10. However, in the heat pump unit X, since the air heat exchanger 3 is accommodated in the upper accommodating chamber 12, the drain port 14 can be provided on the back portion of the lower accommodating chamber 11.

  Thus, the structure in which the drain outlet 14 is provided in the back surface 10c of the heat pump unit X is particularly suitable in a cold district. Specifically, since the drain port 14 is disposed at a position higher than the bottom portion in the back portion of the lower storage chamber 11, external piping (not shown) connected to the drain port 14 can be directly guided to a warm room. Therefore, the condensed water flowing in the external pipe (not shown) can be guided to the room without being exposed to the outdoor air and drained, and the condensed water in the external pipe (not shown) can be prevented from freezing. it can. At this time, the drain port 14 is formed with a size of about φ25 to 35 mm, for example, and the outlet on the upper housing chamber 12 side, that is, the outlet on the partition plate 13 side, is connected to the air heat exchanger 3 by the blower 4. If it is provided so as to be located on the upstream side of the blown air, warm air in the room is sucked by the blower 4 through the external pipe (not shown), so that not only the inside of the external pipe (not shown) but also the upper storage chamber Freezing of the condensed water on the 12 partition plates 13 can be prevented. In addition, the diameter of the drain port 14 or the external pipe (not shown) may be a size that allows indoor air to circulate when the condensed water is passing.

  Furthermore, the partition plate 13 is provided above the water heat exchanger 2. Thereby, the partition plate 13 can receive the heat radiation from the water heat exchanger 2 sufficiently. Therefore, since the condensed water on the partition plate 13 is warmed, freezing of the condensed water is prevented. Since the water heat exchanger 2 is generally heavy, it is possible to stabilize the heat pump unit X by lowering the center of gravity of the heat pump unit X by providing the water heat exchanger 2 at the bottom. Needless to say.

  In addition, as a related technique related to the present invention, a water heat exchanger that performs heat exchange between a refrigerant and water, and water supplied from outside through the water heat exchanger are supplied to the outside. And the water heat exchanger is applied to a heat pump unit arranged at the bottom of the heat pump unit, and the water heat exchanger accommodates the heat pump unit. There is a technique characterized in that a partition plate is provided for partitioning into a lower storage chamber and an upper storage chamber located above the lower storage chamber, and the water flow path is stored in the lower storage chamber. . Here, for example, electrical equipment such as an electronic circuit that controls the heat pump unit is accommodated in the upper accommodation chamber.

  According to the related art, since not only the water heat exchanger but also the water flow path is accommodated in the lower storage chamber separated from the upper storage chamber by the partition plate, the water in the water flow path is When the leakage occurs, the splashing of the water into the upper storage chamber is blocked by the partition plate, so that it is possible to prevent adverse effects on other equipment such as the electrical equipment.

  Further, if the air heat exchanger is accommodated in the upper accommodation chamber, a drain outlet for draining condensed water from the air heat exchanger is provided on the back surface of the lower accommodation chamber, for example, in a cold district. In such a case, the pipe connected to the drain port can be led directly into a warm room so as not to be exposed to the outside air, so that the condensed water in the pipe can be prevented from freezing. Further, if the outlet is enlarged (for example, about φ25 to 35 mm) and the outlet on the upper storage chamber side of the outlet is provided on the upstream side of the air blown to the air heat exchanger by the blower fan, Since the warm air on the indoor side is sucked in through the pipe connected to the drain outlet by the blower fan, it is possible to prevent freezing of the condensed water not only in the pipe but also in the upper storage chamber.

  Moreover, the structure which the said partition plate serves as the drain pan which receives the condensed water of the said air heat exchanger can be considered. Thereby, the increase in a number of parts can be suppressed.

  At this time, by keeping the partition plate close to the water heat exchanger, the partition plate is heated by heat radiation from the water heat exchanger to prevent the condensed water from freezing on the partition plate. be able to.

  By the way, since the compressor which compresses the refrigerant is generally heavy and vibrates, it is necessary to give the partition plate sufficient strength in order to place the compressor on the partition plate. . Further, in the configuration in which the compressor is accommodated in the upper accommodating chamber, there is a problem that the center of gravity of the heat pump unit is increased and stability is deteriorated.

  Therefore, an opening for inserting a compressor for compressing the refrigerant is formed in the partition plate, and the compressor is inserted into the opening of the partition plate and placed on the bottom plate of the heat pump unit. It is desirable. Thereby, high intensity | strength is not requested | required of the said partition plate, and since the gravity center of the said heat pump unit becomes low, stability is good.

  DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Water heat exchanger, 3 ... Air heat exchanger, 4 ... Blower, 5 ... Electrical equipment, 6 ... Refrigerant piping, 10 ... Housing, 10a ... Front panel, 10b ... Bottom plate, 10c ... Back surface DESCRIPTION OF SYMBOLS 11 ... Lower storage chamber, 12 ... Upper storage chamber, 13 ... Partition plate, 14 ... Drainage port, 20 ... Water circuit (an example of a water distribution path), 21 ... External connection port, 22 ... Water piping, 23 ... Circulation pump , X ... Heat pump unit.

Claims (3)

A water heat exchanger for exchanging heat between the refrigerant and water;
A water flow path for supplying water supplied from the outside to the outside via the water heat exchanger;
A compressor for compressing the refrigerant;
An air heat exchanger for exchanging heat between the refrigerant and outdoor air;
A heat pump unit that connects the compressor, the water heat exchanger, and the air heat exchanger, and includes a refrigerant pipe through which the refrigerant is circulated,
The water heat exchanger is disposed at the bottom of the heat pump unit;
The water flow path and the compressor are provided on the side of the heat pump unit adjacent to the water heat exchanger,
The heat pump unit, wherein the electrical equipment that controls the heat pump unit is provided at a position above the refrigerant pipe.   The heat pump unit according to claim 1, wherein the refrigerant pipe is provided at a position above the water flow path and the compressor. The air heat exchanger further includes a blower for blowing outdoor air,
The heat pump unit according to claim 1 or 2, wherein the air heat exchanger and the blower are provided at a position above the water heat exchanger.

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