WO2018147366A1

WO2018147366A1 - Heat pump unit

Info

Publication number: WO2018147366A1
Application number: PCT/JP2018/004383
Authority: WO
Inventors: 由記光元
Original assignee: 株式会社前川製作所
Priority date: 2017-02-10
Filing date: 2018-02-08
Publication date: 2018-08-16
Also published as: CN108413651A; JP6902359B2; JP2018128232A; CN208312763U

Abstract

This heat pump unit is provided with: a box casing in which an air inlet is formed in the upper region of the lateral surface and in which an air outlet is formed in the top surface; a partition wall which partitions the upper portion of the box casing into a first region containing the air inlet and the air outlet and a second region not containing these, and which has an airflow passage allowing communication between the first region and the second region; a panel-shaped heat exchanger which is provided in the first region; a fan which forms a first airflow passing from the air inlet through the panel-shaped heat exchanger to the air outlet; a heat pump cycle constituent device which is provided in the lower portion of the box casing; and a first inverter unit which is provided in the second region and which controls a compressor. Through operation of the fan, the aforementioned first airflow, is formed, and also a second airflow from the second region to the air outlet.

Description

Heat pump unit

This disclosure relates to a heat pump unit.

Applicants have has previously compressor to the heat medium circulation path, gas cooler, expander and an evaporator, the CO ₂ constitutes a heat pump cycle as a heating medium, the discharge side of the CO ₂ as a heat medium compressor Has proposed a hot water supply apparatus that can supply high-temperature water of about 90 ° C. by setting it to a supercritical state (Patent Document 1).
Further, the present applicant has proposed a hot water supply unit in which the hot water supply devices constituting the heat pump cycle are unitized and made compact (Patent Document 2). This hot water supply unit has a heat exchange chamber in which a heat exchanger that exchanges heat with an air flow is introduced by outside air by a fan, and a machine room in which heat pump cycle components other than the heat exchanger are housed.

The machine room of the hot water supply unit may be provided with an inverter unit that houses an inverter that controls the drive of the compressor together with a compressor or the like. Since the inverter generates heat and the temperature of the closed machine room tends to rise, it is necessary to cool the inverter.
In Patent Document 3, in an outdoor unit of a heat pump water heater, an inverter unit is arranged in a heat exchange chamber and further arranged on the downstream side of the air flow from the heat exchanger, so that the inverter is cooled by air cooled by the heat exchanger. A method for cooling the unit is disclosed.

JP 2007-303807 A JP 2010-286157 A JP 2007-271212 A

As disclosed in Patent Document 3, when the inverter unit is disposed in the heat exchange chamber, it is inevitable that rainwater or dust enters the heat exchange chamber in the case of the outdoor unit. For this reason, the inverter unit may be exposed to rain water, dust, or the like, resulting in failure or a reduction in life.

In view of the above problems, at least one embodiment aims to enable cooling of an inverter unit provided in the heat pump unit in the heat pump unit and to prevent a failure and a decrease in life of the inverter unit.

(1) The heat pump unit according to at least one embodiment is:
A box-shaped casing in which an air intake is formed in an upper region of one or more side surfaces, and an air outlet is formed on an upper surface;
The upper part of the box-shaped casing is arranged along the vertical direction, and is divided into a first region including the air intake and the air outlet and a second region not including the air intake and the air outlet. And a partition wall having an air circulation port for communicating the first region and the second region;
A panel heat exchanger provided in the first region;
A fan that forms a first air flow that flows in from the air intake, passes through the panel heat exchanger, and flows out of the air outlet;
Except for the panel-shaped heat exchanger, the heat pump cycle constituent equipment provided at the lower part of the box-shaped casing,
A first inverter unit that is provided in the second region and houses an inverter for a drive motor of a compressor included in the heat pump cycle constituent device;
With
With the operation of the fan, together with the first air flow, a second air flow is formed that reaches the air outlet through the second region and the air circulation port.

According to the configuration of (1) above, the first inverter unit is provided in the second region having no air intake port and no air outlet, thereby preventing the first inverter unit from being exposed to rainwater, dust, or the like. In addition, the first inverter unit can be cooled by the second air flow formed in the second region.
Furthermore, since the first air flow and the second air flow can be formed by one fan, it is not necessary to provide another fan for forming the second air flow, and the heat pump unit can be simplified and reduced in cost.

(2) In one embodiment, in the configuration of (1),
In the second region, the first inverter unit is attached to the partition wall.
According to the configuration of (2) above, by attaching the first inverter unit to the partition wall, the support portion of the first inverter unit can also be used as the partition wall. Therefore, a special support part for attaching the first inverter unit is not required, and the configuration of the heat pump unit can be simplified and reduced in cost.

(3) In one embodiment, in the configuration of (1) or (2),
A first vent is formed in a part of the box-shaped casing belonging to the second region, and takes in the second air flow into the second region.
According to the configuration of (3) above, formation of the second air flow is facilitated by forming the first vent hole in the box-shaped casing belonging to the second region.

(4) In one embodiment, in any one of the configurations (1) to (3),
A control panel provided in a lower part of the box-shaped casing and containing a control device for controlling the heat pump cycle constituent device;
A second ventilation port formed at a position where a third air flow can be formed through the control panel to the second region by operation of the fan at a lower portion of the box-shaped casing;
Is provided.
According to the configuration of (4) above, by forming the second vent at a position where a third air flow can be formed through the control panel to the second region by operating the fan at the lower part of the box-shaped casing, The control panel can be cooled.

(5) In one embodiment, in the configuration of (4),
The control panel is provided with a second inverter unit that houses an inverter for the drive motor of the fan, and the second inverter unit is cooled by the third air flow.
According to the configuration of (5), not only the control panel but also the second inverter unit provided in the control panel can be cooled by forming the third air flow.

(6) In one embodiment, in any one of the configurations (1) to (5),
The panel-like heat exchanger has the pair of plate-like members along the vertical direction so that the distance between the pair of plate-like members, at least one of which is the panel-like heat exchanger, decreases as it goes downward. Are arranged,
The air circulation port is formed in the partition wall at a position communicating with the space between the pair of plate-like members.
According to the configuration of (6) above, since a plurality of panel heat exchangers can be arranged, the heat exchange performance can be improved without increasing the volume of the unit body. Moreover, since a panel-shaped heat exchanger can be arrange | positioned inside the surface of a box-shaped casing, a panel-shaped heat exchanger can be protected from a stepping stone and another obstruction.

(7) In one embodiment, in any one of the configurations (1) to (6),
The air circulation port includes a louver.
According to the configuration of (7) above, by providing a louver at the air circulation port formed in the partition wall, it is possible to prevent rainwater and dust from entering the second region from the first region through the air circulation port. it can.

According to one embodiment, it is possible to cool the inverter unit provided in the heat pump unit, and it is possible to prevent the inverter unit from being broken or shortened due to rain water or dust.

It is a perspective view of the heat pump unit concerning one embodiment. It is a perspective view of the heat pump unit concerning one embodiment. It is a perspective view of the heat pump unit concerning one embodiment. It is explanatory drawing which shows the cross section of the heat pump unit which concerns on one Embodiment. It is a systematic diagram of the heat pump unit which concerns on one Embodiment. It is a front view of the panel-shaped heat exchanger with which the heat pump unit concerning one embodiment is provided.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples.
For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
For example, an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
For example, expressions representing shapes such as quadrangular shapes and cylindrical shapes represent not only geometrically strict shapes such as quadrangular shapes and cylindrical shapes, but also irregularities and chamfers as long as the same effects can be obtained. A shape including a part or the like is also expressed.
On the other hand, the expressions “comprising”, “comprising”, “comprising”, “including”, or “having” one constituent element are not exclusive expressions for excluding the existence of other constituent elements.

1 to 3 are perspective views of a heat pump unit 10 according to an embodiment as viewed from different angles.
As shown in FIGS. 1 to 3, the heat pump unit 10 houses a heat pump cycle component device inside a box-shaped casing 12. The box-shaped casing 12 has

air intakes

14 and 16 formed in the upper region of one or more side surfaces (the front surface 12a and the back surface 12b), and an air outlet 18 formed in the upper surface 12c.
Inside the box-shaped casing 12, a partition wall 20 is disposed along the vertical direction. The partition wall 20 includes a first region R ₁ including

air intake ports

14 and 16 and an air outlet port 18 at an upper portion of the box-shaped casing 12, and a second portion not including the

air inlet ports

14 and 16 and the air outlet port 18. partitioned into a region _{R 2.} The partition wall 20, vent port 22 for communicating the first region R ₁ and a second region R ₂ is formed.

A panel-shaped heat exchanger 24 and the fan 26 is provided in the first region R _1. By the operation of the fan 26, a first air flow a1 that flows in from the air intakes 14 and 16, passes through the panel heat exchanger 24, and flows out from the air outlet 18 is formed. A heat pump cycle component device 50 excluding the panel heat exchanger 24 is provided below the box-shaped casing 12.
Provided in the second region R _2, the first inverter unit 28 for accommodating the inverter drive motor of the compressor 54 included in the heat pump cycle configuration device 50 (see FIG. 5) is provided.
First with airflow a1 by operation of the fan 26, the second air stream a2 extending through the second region R ₂ and the air flow port 22 to the air outlet 18 is formed.

According to this embodiment, by providing the first inverter unit 28 in the second region R ₂ without the

air intake ports

14, 16 and the air outlet 18, the first inverter unit 28 is exposed to rainwater, dust, or the like. Can be prevented. Further, it cools the first inverter unit 28 by the second air stream a2 formed in the second region R _2.
Furthermore, since the first air flow a1 and the second air flow a2 can be formed by one fan 26, there is no need to provide another fan for forming the second air flow a2, and the heat pump unit 10 can be simplified and Cost can be reduced.
In FIG. 1 to FIG. 3, the side panel that shields the front side surface of the box-shaped casing 12 is omitted so that the inside of the box-shaped casing 12 can be illustrated.

The panel heat exchanger 24 is formed in a plate-like body and has a plurality of heat transfer tubes through which the heat medium flows, and a gap through which an air flow can pass is formed between the plurality of heat transfer tubes. Heat exchange with is possible.
In one embodiment, the panel heat exchanger 24 has a plurality of heat transfer tubes 84 (84a, 84b, 84c, 84d, 84e, 84f, 84g, 84h, 84i) between the

support plates

80 and 82, as shown in FIG. , 84j) are provided in parallel, and a gap s through which air can flow is formed between the heat transfer tubes 84 (84a to 84j). The plurality of heat transfer tubes 84 are connected to the inlet header 86 and the outlet header 88, and are bent in the middle, and are arranged between the

support plates

80 and 82 as meandering tubes. The heat medium r that has flowed into the inlet header 86 is divided into a plurality of heat transfer tubes 84, exchanges heat with the air flow passing through the gaps s, and then flows out from the outlet header 88. A frame 90 is installed between the

support plates

80 and 82.
In FIG. 6, some of the heat transfer tubes 84 are not shown.

In one embodiment, as shown in FIGS. 1 to 3, the fan 26 is provided on the upper surface 12 c of the box-shaped casing 12. In one embodiment, the fan 26 is provided at the air outlet 18. This eliminates the need for a special space for providing the fan 26 inside the box-shaped casing 12, so that the box-shaped casing 12 can be made compact.
In one embodiment, the partition wall 20 is configured by a panel plate provided in the vertical direction that partitions the upper region into the first region R ₁ and the second region R ₂ inside the box-shaped casing 12. Thereby, the setting space of the partition wall 20 can be made compact.

In one embodiment, as shown in FIGS. 1 to 3, in the second region R _2, the first inverter unit 28 is attached to the partition wall 20.
According to this embodiment, by attaching the first inverter unit 28 to the partition wall 20, the support portion of the first inverter unit 28 can also be used as the partition wall 20. Therefore, a separate support part for attaching the first inverter unit 28 is not required, and the configuration of the heat pump unit 10 can be simplified and reduced in cost.

In one embodiment, it comprises a first vent port 30 in a part of the box-shaped casing 12 belonging to the second region R _2. It can taking in air for the first ventilation port 30 to form a second air stream a2 in the second region R _2.
According to this embodiment, by forming the first vent port 30 in the box-shaped casing 12 belonging to the second region R _2, the formation of the second air stream a2 is facilitated.

In one embodiment, as shown in FIGS. 1 to 3, the air circulation port 22 is formed at an upper position of the partition wall 20, and the first inverter unit 28 is fixed at an intermediate position in the vertical direction of the partition wall 20. 1 vent 30 is formed in the lower part of the front 12a of the box-shaped casing 12 of the second region _{R 2.}
As a result, the second air flow a2 flowing in from the first vent 30 and flowing out from the air outlet 18 can be the shortest air flow path. Therefore, the pressure loss of the second air flow a2 can be suppressed and the fan power can be reduced.

In one embodiment, as shown in FIG. 4, a control panel 36 that houses a control device that controls the heat pump cycle component device 50 is provided in the lower part of the box-shaped casing. Moreover, the 2nd ventilation port 38 is formed in the lower part in a box-shaped casing. The second vent 38 is formed a third air stream a3 leading to the second region R ₂ through the control panel 36 by the operation of the fan 26 to formable positions. Thus, the operation of the fan 26, air flowing from the second vent 38 can form a third air stream a3 reaching the control panel 36 and the second region R ₂ through.
According to this embodiment, it is possible to form a third air stream a3 reaching the second region R ₂ through a control panel 36 enters from the second ventilation opening 38 by operation of the fan 26, controlled by a third air stream a3 Release 36 can be cooled.

In one embodiment, as shown in FIG. 4, the second vent 38 is formed in the box-shaped casing 12 located in the vicinity of the control panel 36 at the lower part of the box-shaped casing 12.
As a result, the cooling effect of the control panel 36 can be enhanced by the third air flow a3 flowing from the second vent 38.
In one embodiment, the control panel 36 is disposed near the back surface 12 b of the box-shaped casing 12, and the second vent 38 is formed on the back surface 12 b at a position facing the control panel 36.
As a result, the cooling effect of the control panel 36 can be enhanced by the third air flow a3 flowing from the second vent 38.

In one embodiment, as shown in FIG. 4, a second inverter unit 34 that houses an inverter that controls the drive motor 32 of the fan 26 is provided in the control panel 36. As a result, the second inverter unit 34 can be cooled by the third air flow a3.
According to this embodiment, since the second inverter unit 34 can be cooled together with the control panel 36 by the third air flow a3, it is not necessary to separately provide a means for cooling the second inverter unit 34. Therefore, the heat pump unit 10 can be simplified and reduced in cost.
Further, in this embodiment, not only the first inverter unit 28 and the control panel 36 but also the second inverter unit 34 can be cooled by one fan 26, so that the heat pump unit 10 can be simplified and reduced in cost. it can.
In FIGS. 1 and 2, the arrow indicating the third air flow a3 is omitted.

In one embodiment, as shown in FIG. 4, the second inverter unit 34 is built in the control panel 36. Accordingly, the second inverter unit 34 and the control panel 36 can be simultaneously cooled by the third air flow a3.

In one embodiment, as shown in FIG. 4, the panel heat exchanger 24 includes a pair of plate-like members, at least one of which is a panel heat exchanger. These pair of plate-like members are arranged along the vertical direction so that the distance between the pair of plate-like members decreases as it goes downward. The air circulation port 22 is formed in the partition wall 20 at a position communicating with the space between the pair of plate-like members.
According to this embodiment, since one or more panel-like heat exchangers 24 can be arranged, the heat exchange performance can be improved, and the panel-like heat exchanger 24 can be arranged inside the surface of the box-shaped casing 12, Can protect panel heat exchangers from stepping stones and other obstacles.

In one embodiment, the pair of plate-like members is constituted by a pair of panel heat exchangers. Accordingly, the amount of heat exchange between the air flow and the heat medium r can be increased without increasing the volume of the box-shaped casing 12, and the heat exchange performance can be improved.

In one embodiment, as shown in FIG. 4, the pair of panel heat exchangers 24 are supported by a pair of support frames 40. Further, a drain pan 42 is provided between the pair of support frame bodies 40 and below a space formed between the pair of panel heat exchangers 24. When the panel heat exchanger 24 exchanges heat with the air flow, the condensed water condensed and condensed by the air flow is received by the drain pan 42 and discharged from the box-shaped casing 12.

In one embodiment, the air circulation port 22 includes a louver 44 as shown in FIGS.
According to this embodiment, by providing the louver 44 at the air circulation port 22 formed in the partition wall 20, rainwater, dust, or the like enters the second region R ₂ from the first region R ₁ through the air circulation port 22. Can be suppressed.

In one embodiment, as shown in FIGS. 1 to 3, each of the first vent 30 and the second vent 38 is provided with a louver.
According to this embodiment, it is possible to prevent rainwater, dust and the like from entering the inside of the box-shaped casing 12 from the first vent 30 and the second vent 38.

FIG. 5 shows the heat pump cycle component device 50 of the heat pump unit 10 according to an embodiment.
In FIG. 5, a heat pump cycle component device 50 such as a compressor 54 is provided in a heat medium circulation path 52. The heat pump cycle component includes a condenser 56, an expansion valve 58, and a panel heat exchanger 24 in addition to the compressor 54.
Further, the heat medium introduction pipe 60 is connected to the high-pressure area heat medium circulation path 52 downstream of the condenser 56, and the heat medium discharge pipe 62 is connected to the low-pressure area heat medium circulation path 52 downstream of the expansion valve 58. And a heat medium tank 64 to which the heat medium introduction pipe 60 and the heat medium discharge pipe 62 are connected.

In one embodiment, as shown in FIG. 5, the heat medium compressed by the compressor 54 is cooled by the cooling water flowing through the cooling water channel 66 by the condenser 56. The cooling water channel 66 is provided with a cooling water pump 68 that sends the cooling water to the condenser 56. The heat medium cooled by the condenser 56 is cooled by exchanging heat with the heat medium sent from the panel heat exchanger 24 by the internal heat exchanger 70 and then depressurized via the expansion valve 58.

The heat medium depressurized through the expansion valve 58 is vaporized by the panel heat exchanger 24 using air as a heat source. As shown in FIG. 6, the panel heat exchanger 24 has a plurality of heat transfer tubes 84 arranged in a panel shape, and an air flow a passing between the plurality of heat transfer tubes 84 is formed by the fan 26. The heat medium vaporized in the panel heat exchanger is heated by exchanging heat with the heat medium sent from the condenser 56 in the internal heat exchanger 70 and then sent again to the compressor 54 to be compressed.

In one embodiment, a part of the heat medium in the heat medium circulation path 52 is stored in the heat medium tank 64 or stored in the heat medium tank 64 by the opening / closing operation of the first on-off valve 72 and the second on-off valve 74. By returning the heat medium to the heat medium circuit 52, the amount of heat medium flowing through the heat medium circuit 52 can be adjusted.
In the heat pump unit 10, the hot water heated by the condenser 56 can be supplied to the customer as a heat source.

In one embodiment, a heat medium (for example, CO ₂ ) is used in which the heat medium becomes a supercritical state on the outlet side of the compressor 54. By using such a heat medium, hot water of about 90 ° C. can be generated. In this embodiment, a gas cooler is used as the condenser 56.

According to at least one embodiment, it is possible to cool the inverter unit provided in the heat pump unit, and it is possible to prevent the inverter unit from failing or having a reduced life.

DESCRIPTION OF SYMBOLS 10 Heat pump unit 12 Box-shaped casing 12a Front surface

12b Rear surface

12c Upper surface

14, 16 Air intake port 18 Air outflow port 20 Partition wall 22 Air distribution port 24 Panel heat exchanger 26 Fan 28 First inverter unit 30 1st ventilation port 32 Drive motor 34 Second inverter unit 36 Control panel 38 Second vent 40 Support frame 42 Drain pan 44 Louver 50 Heat pump cycle component 52 Heat medium circulation path 54 Compressor 56 Condenser 58 Expansion valve 60 Heat medium introduction pipe 62 Heat medium Drain pipe 64 Heat medium tank 66 Cooling water channel 68 Cooling water pump 70 Internal heat exchanger 72 First on-off valve 74 Second on-off

valve

80, 82 Support plate 84 (84a, 84b, 84c, 84d, 84e, 84f, 84g, 84h , 84i, 84 , 84j) the heat transfer tube 86 inlet header 88 outlet header 90 frames R ₁ first region R ₂ second region a airflow a1 first air stream a2 second air stream a3 third airflow s clearance

Claims

A box-shaped casing in which an air intake is formed in an upper region of one or more side surfaces, and an air outlet is formed on an upper surface;
The upper part of the box-shaped casing is arranged along the vertical direction, and is divided into a first region including the air intake and the air outlet and a second region not including the air intake and the air outlet. And a partition wall having an air circulation port for communicating the first region and the second region;
A panel heat exchanger provided in the first region;
A fan that forms a first air flow that flows in from the air intake, passes through the panel heat exchanger, and flows out of the air outlet;
Except for the panel-shaped heat exchanger, the heat pump cycle constituent equipment provided at the lower part of the box-shaped casing,
A first inverter unit that is provided in the second region and houses an inverter for a drive motor of a compressor included in the heat pump cycle constituent device;
With
The heat pump unit is characterized in that a second air flow that reaches the air outlet through the second region and the air circulation port is formed together with the first air flow by the operation of the fan.
The heat pump unit according to claim 1, wherein in the second region, the first inverter unit is attached to the partition wall.
The first vent according to claim 1, further comprising a first air vent that is formed in a part of the box-shaped casing belonging to the second region and takes the second air flow into the second region. Heat pump unit.
A control panel provided in a lower part of the box-shaped casing and containing a control device for controlling the heat pump cycle constituent device;
A second ventilation port formed at a position where a third air flow can be formed through the control panel to the second region by operation of the fan at a lower portion of the box-shaped casing;
The heat pump unit according to any one of claims 1 to 3, further comprising:
The heat pump unit according to claim 4, wherein a second inverter unit that houses an inverter for the fan drive motor is built in the control panel, and the second inverter unit is cooled by the third air flow.
The panel-like heat exchanger has the pair of plate-like members along the vertical direction so that the distance between the pair of plate-like members, at least one of which is the panel-like heat exchanger, decreases as it goes downward. Are arranged,
The heat pump unit according to any one of claims 1 to 5, wherein the air circulation port is formed in the partition wall at a position communicating with a space between the pair of plate-like members.
The heat pump unit according to any one of claims 1 to 6, wherein the air circulation port formed in the partition wall includes a louver.