WO2018147364A1

WO2018147364A1 - Assembly method of heat exchange unit

Info

Publication number: WO2018147364A1
Application number: PCT/JP2018/004381
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: JP6853059B2; CN208313093U; JP2018128230A; CN108413788A

Abstract

This assembly method of a heat exchange unit involves: an arrangement step in which a pair of plate members, at least one of which is a panel heat exchanger, is arranged along the vertical direction such that the interval between the pair of plate members becomes smaller in the downward direction; a fitting step in which the bottom ends of the pair of plate members are fitted in a fitting part of a frame; and a restraining step in which the pair of plate members is restrained by a restraint jig above the bottom end of the pair of plate members fitted in the fitting part of the frame such that the interval between the pair of plate members does not widen.

Description

Assembling method of heat exchange unit

The present disclosure relates to a method for assembling a heat exchange unit having a panel heat exchanger.

Applicants have has previously heat exchange medium circulation path to the compressor, a gas cooler, expander and an evaporator, the CO ₂ constitutes a heat pump as a heat exchange medium, the CO ₂ compressor as a heat exchange medium Has proposed a hot water supply device capable of supplying high-temperature water of about 90 ° C. by setting a supercritical state on the discharge side (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).

In Patent Document 3, in a heat exchange unit provided in a unit type device used for air conditioning, hot water supply or the like, a pair of panel heat exchangers are arranged in a V shape so that the unit body is constricted at the center portion. The structure which was made is disclosed. This prevents deterioration in the velocity distribution of air passing through the heat exchange unit when a plurality of unit-type devices are arranged side by side, and improves workability during maintenance and inspection.

JP 2007-303807 A JP 2010-281552 A JP 2007-163017 A

In a unit-type device having a panel heat exchanger, the work of arranging a pair of heavy panel heat exchangers in a V shape inside a narrow unit body is a heavy burden for the worker. Reduction and improvement in work efficiency are desired.

In view of the above problems, at least one embodiment aims to reduce the work burden on an operator and improve the work efficiency when assembling a heat exchange unit in a heat exchange unit having a panel heat exchanger.

(1) The assembly method of the heat exchange unit according to at least one embodiment is as follows:
An arrangement step of arranging the pair of plate members along the vertical direction so that the interval between the pair of plate members whose at least one is a panel heat exchanger decreases downward,
A fitting step for fitting the lower end portions of the pair of plate-like members to the fitting portion of the frame; and
The pair of plate-like members are disposed above the lower end portions of the pair of plate-like members fitted to the fitting portion of the frame so that the gap between the pair of plate-like members does not widen. A restraining step for restraining with a restraining jig;
Is provided.

According to the above method (1), when the pair of plate-like members are arranged along the vertical direction in the arranging step, the lower ends of the pair of plate-like members are fitted to the frame body in the fitting step. The pair of plate-like members can be stably positioned at desired positions by being fitted to the portions and by restraining the upper portions of the pair of plate-like members with a restraining jig in the restraining step.
Accordingly, the pair of plate-like members are positioned at a desired position while being supported by the frame body and the restraining jig, so that the work burden on the worker can be reduced and the work efficiency can be improved.

(2) In one embodiment, in the method of (1),
In the restraining step, the pair of plate-like members are restrained by using, as the restraining jig, a support jig that is supported by the foundation of the heat exchange unit and supports the pair of plate-like members from both outsides.
According to the method of (2) above, in the restraining step, the supporting jig for supporting the pair of plate-like members from both outsides is used as the restraining jig, so that the weight of the pair of plate-like members can be reduced. The pair of plate-like members can be held in a desired posture while being added. Therefore, the work burden on the worker can be reduced and the work efficiency can be improved.

(3) In one embodiment, in the method of (1) or (2),
The fixing device further includes a fixing step of fixing the pair of plate-like members by a connecting member that is bridged between upper end portions of the pair of plate-like members in a state where the pair of plate-like members are restrained by the restraining jig.
According to the method (3), the pair of plate-like members can be stably held in a desired posture by fixing the upper end portions of the pair of plate-like members by the coupling tool in the fixing step.

(4) In one embodiment, in the method of (3),
The method further includes attaching the fan to the connector such that one or more fans are positioned between the pair of plate-like members.
According to the above method (4), in the above step, by attaching the fan to the coupling tool, the coupling tool can be used not only as a positioning jig for the pair of plate-like members but also as a support part for the fan. Thereby, the assembly process of the heat exchange unit can be simplified.

(5) In one embodiment, in any one of the methods (1) to (4),
The method further includes the step of attaching side panels that block openings formed at both ends in the longitudinal direction of the pair of plate-like members between the pair of plate-like members restricted by the restriction step.
According to the method of (5) above, the openings formed at both ends in the longitudinal direction of the pair of plate members between the pair of plate members are blocked by the side panels, so that the panel heat An air flow path passing through the exchanger and passing between the pair of plate-like members can be formed. Thereby, the heat exchange efficiency with the air of a heat exchange unit can be improved.

(6) In one embodiment, in any one of the methods (1) to (5),
The method further includes the step of attaching a drain pan to the frame.
According to the method of (6) above, by attaching the drain pan in the above step, when the heat exchange unit is in operation, the drain in which the condensed water adhering to the outer surface of the panel-like heat exchanger has been dropped downward is added to the drain pan. Receiving and discharging from the heat exchange unit.
Further, the frame body can be used as it is as a pair of plate-like members and a drain pan support, and the manufacture of the heat exchange unit can be simplified and reduced in cost.

According to at least one embodiment, it is possible to reduce the work burden on the worker when assembling the heat exchange unit and to improve the work efficiency.

It is process drawing which shows the assembly process of the heat exchange unit which concerns on one Embodiment. It is a perspective view which shows the heat exchange unit in the assembly which concerns on one Embodiment. It is a perspective view which shows the heat exchange unit in the assembly which concerns on one Embodiment. It is a perspective view which shows the heat exchange unit in the assembly which concerns on one Embodiment. It is a perspective view which shows the heat pump unit after the assembly 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 provided in the heat exchange unit which concerns on one Embodiment.

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.

As shown in FIG. 1, the method for assembling the heat exchange unit 10 according to an embodiment is as follows. First, a pair of plate-like members 12 (12 a, 12 b) (see FIG. 3) are respectively arranged on the foundation 14 along the vertical direction. Arrangement step S10 is performed.
In the arrangement step S10, at least one of the pair of plate members 12 is a panel heat exchanger, and is arranged along the vertical direction so that the interval between the pair of plate members decreases downward. As will be described later, the panel heat exchanger has a plurality of heat transfer tubes arranged in a panel shape, and has a gap through which air can pass between the plurality of heat transfer tubes.

In arrangement step S10, as shown in FIG. 2, the frame body 16 is provided above the foundation 14, and in the arrangement step S10, the lower ends of the pair of plate-like members 12 are engaged with the engagement portion 17 of the frame body 16. (Combining step S12).
Moreover, in arrangement | positioning step S10, a pair of plate shape is located above the lower end part of a pair of plate-shaped member fitted to the fitting part 17 of the frame 16 so that the space | interval between a pair of plate-shaped member may not spread. The member 12 is restrained by the restraining jig 18 (restraining step S14).

According to this embodiment, the lower end portions of the pair of plate-like members 12 are fitted to the fitting portions 17 of the frame body 16 in the mating step S12, and the upper portions of the pair of plate-like members 12 are restrained in the restraining step S14. By restraining with the jig | tool 18, a pair of plate-shaped member 12 can be stably positioned in the desired position along an up-down direction.
As described above, the pair of plate-like members 12 are positioned at desired positions while being supported by the frame body 16 and the restraining jig 18, so that the work burden on the worker can be reduced and the work efficiency can be improved.

In one embodiment, the panel heat exchanger (plate member 12) includes a plurality of heat transfer tubes 74 (74a, 74b, 74c, 74d, 74e, 74f, between the

support plates

70 and 72, as shown in FIG. 74g, 74h, 74i, 74j) are provided in parallel, and a gap s through which air can flow is formed between the heat transfer tubes 74 (74a to 74j). The plurality of heat transfer tubes 74 are connected to the inlet header 76 and the outlet header 78, bent in the middle, and disposed between the

support plates

70 and 72 as meandering tubes. The heat exchange medium r that has flowed into the inlet header 76 is divided into a plurality of heat transfer tubes 74, exchanges heat with the air flow passing through the gaps s, and then flows out from the outlet header 78. A frame 80 is installed between the

support plates

70 and 72.
In addition, in FIG. 7, illustration of a part of heat exchanger tube 74 is abbreviate | omitted.

In one embodiment, the pair of plate-like members 12 (12a, 12b) are both panel-like heat exchangers, and the pair of panel-like heat exchangers has a space between the pair of panel-like heat exchangers downward. It is arranged in a V shape so as to become smaller.
This makes it possible to double the amount of heat exchange between the heat exchange medium and the air flow as compared with the case where only one of the pair of plate-like members is a panel heat exchanger.

In one embodiment, as shown in FIG. 2, the frame body 16 has a square shape, a bottom portion 16 a and a side portion 16 b, and a joint portion 17 is formed inside the side portion 16 b. The lower ends of the pair of plate-like members 12 are engaged with and fixed to the engagement portion 17. Further, the frame body 16 is fixed to a gantry 20 erected on the foundation 14.

In one embodiment, as shown in FIG. 3, in the restraint step S <b> 14, the support jig 22 (22 a, 22 b) supported by the base 14 and supporting the pair of plate-like members 12 from both outsides is restrained jig 18. Used to restrain the pair of plate-like members 12.
According to this embodiment, the weight of the pair of plate members 12 is added to the support jig 22 by using the support jig 22 that supports the pair of plate members 12 from both outsides as the restraining jig 18. The pair of plate-like members can be held in a desired posture while being made. Therefore, the work burden on the worker can be reduced and the work efficiency can be improved.
In one embodiment, the support jig 22 includes a support column 23 a erected on the foundation 14 and a contact portion 23 b extending from the upper end of the support column 23 a toward the plate-shaped member, and the contact portion 23 b is a pair of plate-shaped members 12. And a pair of plate-like members 12 are supported.

In one embodiment, the support jig 22 does not necessarily have to be provided on the foundation 14 and may be supported by a support portion provided around the foundation 14.

In one embodiment, as shown in FIG. 1, it further includes a fixing step S16. In the fixing step S <b> 16, as shown in FIG. 4, in a state where the pair of plate-like members 12 are restrained by the restraining jig 18, a connecting tool 24 is installed between the upper ends of the pair of plate-like members 12. Thus, the upper ends of the pair of plate-like members 12 are fixed.
According to this embodiment, the pair of plate-like members 12 can be stably held in a desired posture along the vertical direction by fixing the upper end portions of the pair of plate-like members 12 by the connector 24.

In one embodiment, as shown in FIG. 4, a pair of connectors 24 are attached to both ends of the upper ends of the pair of plate-like members 12. Thereby, the pair of plate-like members 12 can be stably supported in a desired posture.

In one embodiment, as shown in FIG. 1, the fan mounting step S18 is further provided. In the fan attachment step S18, as shown in FIG. 5, one or more fans 26 are attached to the connector 24, and the one or more fans 26 are positioned between the pair of plate-like members.
According to this embodiment, by attaching the fan 26 to the connection tool 24, the connection tool 24 can be used not only as a positioning jig for the pair of plate-like members 12 but also as a support part for the fan 26. Thereby, the assembly process of the heat exchange unit 10 can be simplified.

In one embodiment, in the fixing step S <b> 16, a fixing jig 28 dedicated to fixing the fan is attached not only to the pair of connecting tools 24 but also to the upper ends of the pair of plate-like members 12 in the middle of the pair of connecting tools 24.
Thereby, the plurality of fans 26 can be stably attached to the upper portions of the pair of plate-like members 12.

In one embodiment, as shown in FIG. 1, a side panel attachment step S20 is further provided. In the side panel attachment step S20, as shown in FIG. 4, the side panel 30 that blocks the openings o formed at both ends in the longitudinal direction of the pair of plate-like members 12 between the pair of plate-like members restricted in the restriction step S14. Install.
According to this embodiment, the opening o formed in the longitudinal direction both ends of the pair of plate-like members 12 is blocked by the side panel 30 between the pair of plate-like members, so that the panel-like heat is generated when the heat exchange unit 10 is in operation. An air flow path passing through the exchanger and passing between the pair of plate-like members can be formed. Thereby, the heat exchange efficiency with the air of the heat exchange unit 10 can be improved.
4 and 5, only one opening o of the pair of openings o formed on both sides of the pair of plate-like members 12 is shielded by the side panel 30, but the other opening o is also covered by the side panel. 30 is attached.

In one embodiment, as shown in FIG. 4, the upper side of the side panel 30 is fixed by a connector 24. As described above, the connector 24 is also used as a jig for fixing the side panel 30 to the opening o. Thereby, the side panel mounting step S20 can be simplified.

In one embodiment, as shown in FIG. 1, a drain pan attaching step S22 is further provided. In the drain pan attaching step S22, the drain pan 32 is attached to the frame 16 as shown in FIG.
According to this embodiment, by attaching the drain pan 32 to the frame body 16, when the heat exchange unit 10 is in operation, the drain pan 32 receives the drain in which the condensed water adhering to the outer surface of the panel heat exchanger has dropped. The heat exchange unit 10 can be discharged.
Further, the frame body 16 can be used as it is as a support portion for the pair of plate-like members 12 and the drain pan 32, and the manufacture of the heat exchange unit 10 can be simplified and reduced in cost.
After the heat exchange unit 10 is assembled, the support jig 22 (22a, 22b) is removed.

In one embodiment, the heat exchange unit 10 is incorporated into a heat pump unit 40 as shown in FIG. In the heat pump unit 40, the heat exchange unit 10 is provided in the upper region inside the box-shaped casing 42, and the heat pump cycle component device 44 is provided in the lower region.
In the heat exchange unit 10, at least one of the pair of plate-like members 12 (12a, 12b) is configured by a panel heat exchanger. An air intake 46 is formed in the area where the panel heat exchanger is provided at least inside the front area 42 a and the rear area 42 b of the upper area of the box-shaped casing 42, and an air outlet 48 is formed in the fan 26.

An air flow path is formed in the box-shaped casing 42 through the panel heat exchanger from the air intake 46 to the air outlet 48, and the air flow through the air flow path when the fan 26 is operated. a is formed.
By forming the air flow a, the heat exchange performance between the heat exchange medium r flowing through the heat transfer tube of the panel heat exchanger and the air can be improved.

FIG. 6 shows the heat pump cycle component device 44 of the heat pump unit 40.
In FIG. 6, a heat pump cycle component device 44 such as a compressor 52 is provided in the heat exchange medium circulation path 50. The heat pump cycle constituent device 44 includes a plate-like member 12 constituted by a condenser 54, an expansion valve 56, and a panel heat exchanger in addition to the compressor 52.
Further, the heat exchange medium introduction pipe 58 is connected to the high pressure region heat exchange medium circulation path 50 on the downstream side of the condenser 54, and the heat exchange medium discharge pipe 60 is located on the downstream side of the expansion valve 56 in the low pressure region heat exchange medium circulation. A heat exchange medium tank 62 connected to the passage 50 and connected to the heat exchange medium introduction pipe 58 and the heat exchange medium discharge pipe 60 is provided.

In one embodiment, as shown in FIG. 6, the heat exchange medium compressed by the compressor 52 is cooled by the cooling water flowing through the cooling water channel 64 by the condenser 54. The cooling water path 64 is provided with a cooling water pump 65 that sends the cooling water to the condenser 54. The heat exchange medium cooled by the condenser 54 is cooled by exchanging heat with the heat exchange medium sent from the panel heat exchanger (plate-like member 12) by the liquid gas heat exchanger 66, and then passed through the expansion valve 56. Depressurized.

The heat exchange medium depressurized through the expansion valve 56 is vaporized using air as a heat source in the panel heat exchanger. As shown in FIG. 7, a plurality of heat transfer tubes 74 are arranged in a panel shape in the panel heat exchanger, and an air flow a passing between the plurality of heat transfer tubes 74 is formed by the fan 26. The heat exchange medium vaporized by the panel heat exchanger is heated by exchanging heat with the heat exchange medium sent from the condenser 54 by the liquid gas heat exchanger 66 to be heated to an overheated state and sent to the compressor 52 for compression. .

In one embodiment, a part of the heat exchange medium of the heat exchange medium circulation path 50 is stored in the heat exchange medium tank 62 by the opening / closing operation of the first on-off valve 67 and the second on-off valve 68, or the heat exchange medium tank 62. The flow rate of the heat exchange medium flowing through the heat exchange medium circulation path 50 can be adjusted by returning the heat exchange medium stored in the heat exchange medium circulation path 50.
In the heat pump unit 40, the hot water heated by the condenser 54 can be supplied to the customer as a heat source.

In one embodiment, a heat exchange medium (eg, CO ₂ ) is used in which the heat exchange medium is in a supercritical state on the outlet side of the compressor 52. By using such a heat exchange medium, hot water of about 90 ° C. can be generated. In this embodiment, a gas cooler is used as the condenser 54.

According to one embodiment, in a heat exchange unit having a panel heat exchanger, it is possible to reduce the work burden on the worker when assembling the heat exchange unit and increase the work efficiency.

DESCRIPTION OF SYMBOLS 10 Heat exchange unit 12 (12a, 12b) Plate-shaped member 14 Foundation 16 Frame

16a Bottom part

16b Side part 17 Joint part 18 Restraint jig 20 Base 22 (22a, 22b) Support jig 23a Prop 23b Abutting part 24 Connection tool DESCRIPTION OF SYMBOLS 26 Fan 28 Fixing jig 30 Side panel 32 Drain pan 40 Heat pump unit 42 Box-shaped casing 42a Front side 42b Rear side 44 Heat pump cycle apparatus 46 Air intake port 48 Air outlet 50 Heat exchange medium circulation path 52 Compressor 54 Condenser 56 Expansion valve 58 Heat exchange medium introduction pipe 60 Heat exchange medium discharge pipe 62 Heat exchange medium tank 64 Cooling water channel 65 Cooling water pump 66 Liquid gas heat exchanger 67 First on-off valve 68 Second on-off

valve

70, 72 Support plate 74 (74a, 74b, 74c, 74d, 4e, 74f, 74g, 74h, 74i, 74j) the heat transfer tube 76 inlet header 78 outlet header 80 frames a airflow o opening r heat exchange medium

Claims

An arrangement step of arranging the pair of plate members along the vertical direction so that the interval between the pair of plate members whose at least one is a panel heat exchanger decreases downward,
A fitting step for fitting the lower end portions of the pair of plate-like members to the fitting portion of the frame; and
The pair of plate-like members are disposed above the lower end portions of the pair of plate-like members fitted to the fitting portion of the frame so that the gap between the pair of plate-like members does not widen. A restraining step for restraining with a restraining jig;
A method for assembling a heat exchange unit comprising:
In the restraint step, the pair of plate-like members are restrained by using, as the restraint jig, a support jig that is supported on the base of the heat exchange unit and supports the pair of plate-like members from both outsides. The method for assembling the heat exchange unit according to claim 1, wherein the heat exchange unit is assembled.
A fixing step of fixing the pair of plate-like members by means of a connecting tool spanned between upper end portions of the pair of plate-like members in a state where the pair of plate-like members are restrained by the restraining jig; The method for assembling a heat exchange unit according to claim 1 or 2, characterized in that:
The method for assembling a heat exchange unit according to claim 3, further comprising a step of attaching the fan to the connector so that one or more fans are positioned between the pair of plate-like members.
2. The method according to claim 1, further comprising a step of attaching side panels that block openings formed at both longitudinal ends of the pair of plate-like members between the pair of plate-like members constrained in the restraining step. 5. The method for assembling the heat exchange unit according to any one of 4 above.
The method for assembling a heat exchange unit according to any one of claims 1 to 5, further comprising a step of attaching a drain pan to the frame.