JP2016031194A - Heat pump type refrigeration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deviation of pressure loss of air introduced into a housing through a heat exchanger for a refrigerant and a heat exchange portion for cooling water, and to unify an air volume with a simple constitution.SOLUTION: A heat pump type refrigeration device including a blower fan 24 for introducing introduced air A from a side portion of a housing 21 to the inside and discharging the same from an upper portion, a heat exchanger 3A for a refrigerant, exchanging heat between a refrigerant B circulated in a refrigeration circuit R provided with a compressor 2 and the air A, and a heat exchange portion 23 for cooling water, exchanging heat between cooling water C for cooling an apparatus 1 for driving the compressor 2 and the air A, the heat exchangers 3A are respectively disposed at both opposed side portions of the side portions of the housing 21, and the heat exchange portion 23 is composed of a coiled heat exchanger 23A formed into the cylindrical shape by winding a heat transfer tube 23a in which the cooling water C is circulated, in several times, and is disposed inside of the housing 21 at a downstream side of the heat exchangers 3A in the circulating direction of the air A in a state in which its axial direction is along the vertical direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heat pump refrigeration apparatus. More specifically, the present invention is provided with a housing and an upper portion of the housing, and introduced air introduced into the inside from the side of the housing into the external space through the upper portion of the housing. A blower fan to be discharged, a refrigeration circuit provided with a compressor, a fin-tube type heat exchanger for refrigerant that exchanges heat between the refrigerant flowing through the tube of the refrigeration circuit and the introduced air, and a device that drives the compressor A heat pump refrigeration system comprising: a cooling water circulation path through which cooling water for cooling the cooling water flows; and a heat exchange section for cooling water that exchanges heat between the cooling water flowing through the cooling water circulation path and the introduced air About.

  In such a heat pump refrigeration apparatus, for example, as shown in Patent Document 1, a blower fan is disposed on the upper side in an outdoor unit, and fin tube type heat exchangers for cooling water are provided on both sides of the blower fan. (An example of a cooling water heat exchanger) is disposed, and a fin-tube refrigerant heat exchanger is disposed on the outer side of each cooling water heat exchanger. Then, by rotating the blower fan, external air is introduced into the outdoor unit through the refrigerant heat exchanger and the cooling water heat exchanger in this order, and discharged from the upper side to the external space via the blower fan. It is supposed to be configured. Thereby, heat can be indirectly exchanged between the external air, the refrigerant, and the cooling water.

JP 2004-116931 A

  Here, examples of the device that drives the compressor include a fuel cell that drives the compressor with generated power, a gas engine that drives the compressor in conjunction with the driving force of the engine, and the like. And, for example, the rated output and the maximum output of the gas engine are set according to the application, and the capacity of the heat exchanger for cooling water can be surely cooled according to the calorific value at those outputs. The shape and arrangement are determined. For this reason, if it is in the range which can cool a gas engine reliably, the structure of the above-mentioned patent document 1 will be applied to only one side of the inner side of each heat exchanger for refrigerants, for example. Various modifications can be made, such as providing a fin tube type heat exchanger for cooling water.

However, when the configuration is changed in this way, the gas engine can be reliably cooled, but there may be a bias in pressure loss when external air is introduced into the outdoor unit.
For example, as described above, a fin tube type cooling water heat exchanger is provided on one of the inner sides of each refrigerant heat exchanger, and a cooling water heat exchanger is not provided on the other side. In this case, each pressure when external air flows through one side portion where both the refrigerant heat exchanger and the cooling water heat exchanger are provided and the other side portion where only the refrigerant heat exchanger is provided. The loss may be biased because the one side portion is large and the other side portion is small. In such a case, it is necessary to adjust the pressure loss of the external air flowing through each refrigerant heat exchanger, which requires labor and cost for the adjustment and is not preferable.
Moreover, when such adjustment is not made appropriately, the air volume of the external air introduced into the outdoor unit is biased, and the heat exchange capability of each refrigerant heat exchanger may be biased.

  The present invention has been made in view of such a situation, and the object thereof is to prevent the deviation of the flow of introduced air introduced into the housing through the refrigerant heat exchanger and the cooling water heat exchange unit, and An object of the present invention is to provide a heat pump refrigeration apparatus that can realize equalization of air volume with a simple configuration.

In order to achieve the above object, a heat pump refrigeration apparatus according to the present invention comprises:
A housing,
A blower fan that is provided at an upper portion of the casing and discharges the introduction air introduced into the inside from a side portion of the casing to an external space through the upper portion of the casing;
A refrigeration circuit with a compressor;
A fin-tube refrigerant heat exchanger that exchanges heat between the refrigerant flowing through the tube of the refrigeration circuit and the introduced air;
A cooling water circulation path through which cooling water for cooling the device driving the compressor flows;
A heat pump refrigeration apparatus comprising a cooling water heat exchange section for exchanging heat between the cooling water flowing through the cooling water circulation path and the introduced air,
At least a pair of the heat exchangers for refrigerant is disposed on each of opposite side portions of the side portion of the casing,
The cooling water heat exchanging section is constituted by a coiled heat exchanger formed in a cylindrical shape by winding a heat transfer tube through which the cooling water flows a plurality of times. It exists in the point arrange | positioned so that an axial center direction may follow the up-down direction in the downstream of the said pair of refrigerant | coolant heat exchanger in the flow direction of air.

According to the above configuration, when the blower fan provided at the upper part of the casing rotates, the introduced air introduced into the inside from the side of the casing is replaced with the refrigerant heat exchanger and the cooling water heat exchanger. After passing, it is discharged to the external space through the upper part of the housing. Thus, heat exchange between the introduced air and the refrigerant is performed in the refrigerant heat exchanger, and heat exchange between the introduced air and the cooling water is performed in the heat exchange section for the cooling water.
Specifically, the introduced air introduced into the casing is first compressed through a finned-tube refrigerant heat exchanger disposed on each of opposite side portions of the casing. Heat exchange indirectly with the refrigerant flowing in the tube of the refrigeration circuit equipped with the machine. At this time, each refrigerant heat exchanger is arranged in a state of facing each other on both sides facing each other among the side portions of the housing, so that the flow of the introduced air is less likely to be biased between the two positions. Become.

Subsequently, the introduced air after passing through each refrigerant heat exchanger passes through the cooling water heat exchange section located on the downstream side of each refrigerant heat exchanger and flows through the cooling water circulation path. It indirectly exchanges heat with cooling water that cools the equipment (fuel cell, gas engine, etc.) that drives the compressor. At this time, the heat exchanger for cooling water is constituted by a coiled heat exchanger formed in a cylindrical shape by winding a heat transfer tube through which the cooling water flows a plurality of times, and the axial direction is along the vertical direction. Are arranged as follows. For this reason, the introduced air after flowing through the refrigerant heat exchanger passes through the gaps formed between adjacent heat transfer tubes in the vertical direction and continuously formed spirally in the circumferential direction, It will be discharged | emitted by the external space through the ventilation fan from the inside of the said cylindrical coiled heat exchanger. Therefore, even when the introduced air passes through the cylindrical coiled heat exchanger through each gap from any direction except the vertical direction, the problem of the deviation of the flow of the introduced air may occur. Absent.
Therefore, by adopting a cylindrical coiled heat exchanger as the cooling water heat exchanging section, the shape and structure of each refrigerant heat exchanger can be made substantially the same. However, it is possible to realize the prevention of uneven flow of the introduced air and the equalization of the air volume with a simple apparatus configuration.

  Therefore, in the heat pump refrigeration apparatus, it was possible to realize the prevention of unevenness in the flow of the introduced air introduced into the housing through the heat exchanger for refrigerant and the heat exchanger for cooling water and equalization of the air volume with a simple apparatus configuration. .

  A further characteristic configuration of the heat pump refrigeration apparatus according to the present invention is that at least a part of the gaps formed between adjacent heat transfer tubes in the axial direction of the cylindrical coiled heat exchanger. The gap is formed so as to be different in the vertical direction with respect to the gap of the other part serving as a reference.

  According to the above configuration, of the gaps formed between adjacent heat transfer tubes adjacent to each other in the axial direction of the cylindrical coiled heat exchanger, at least a part of the gaps is a reference to other gaps. Therefore, the resistance of the introduced air passing through the cylindrical coiled heat exchanger by the rotation of the blower fan provided at the upper part of the casing is reduced in the vertical direction. Can be adjusted to be different. Thereby, the wind speed of the introduction air introduced into the inside of the housing can be adjusted as appropriate in the vertical direction, and the heat exchange capacity of each refrigerant heat exchanger can be adjusted as appropriate in the vertical direction.

Specifically, in the heat pump type refrigeration apparatus, the introduced air introduced into the inside from the side of the housing by the rotation of the blower fan provided at the top of the housing is used as the heat exchanger for the refrigerant and the heat exchange for the cooling water. It is the structure discharged | emitted from the upper part of a housing | casing through a part. For this reason, the air introduced into the housing tends to have a high upper wind speed and a lower lower air speed, and the heat exchange capacity may be biased depending on the location of each refrigerant heat exchanger. There is.
In such a case, for example, in the axial direction of the cylindrical coiled heat exchanger, each gap formed between adjacent adjacent heat transfer tubes is vertically reduced so as to become narrower from the lower side to the upper side. Are formed in different sizes (intervals), the resistance of the introduced air passing through the cylindrical coiled heat exchanger by the rotation of the blower fan provided at the top of the housing is Can be balanced so that the lower side is relatively small and the lower side is relatively small. As a result, the air introduced into the housing can be made uniform in air speed on both the upper side and the lower side, and the heat exchange capacity can be made uniform in each part of each heat exchanger for refrigerant. You can also.

  Further, if necessary, for example, among the gaps formed between adjacent heat transfer tubes in the axial direction of the cylindrical coiled heat exchanger, at least a part of the gaps as a reference When forming the gaps having different sizes (intervals) in the vertical direction with respect to the gap, the gaps located in the upper part are set as reference parts (for example, the parts located between the upper part and the lower part). It is also possible to form the gaps so as to become narrower sequentially from the lower side to the upper side with respect to the gaps), and to make the gaps located in the lower part narrower than the gaps of other parts serving as a reference.

  A further characteristic configuration of the heat pump refrigeration apparatus according to the present invention is such that the cylindrical coiled heat exchanger has an axial direction concentric with a rotational axis of the blower fan and is below the blower fan. And being disposed between the pair of refrigerant heat exchangers each having the same structure.

According to the above configuration, the cylindrical coil-shaped heat exchanger is disposed on the lower side of the blower fan with its axial direction being concentric with the rotary shaft of the blower fan, and each has the same structure Since the introduced air introduced into the housing via each refrigerant heat exchanger has a substantially the same air volume, it is disposed between the pair of refrigerant heat exchangers. After passing through each of the gaps, it is introduced into the coiled heat exchanger, and after that, only rising upward is discharged to the external space through the blower fan.
Thereby, the air volume of the introduction air introduce | transduced from the side part of a housing | casing by a ventilation fan can be aimed at.

  A further characteristic configuration of the heat pump refrigeration apparatus according to the present invention is that the heat transfer tubes constituting the cylindrical coiled heat exchanger are formed in a bellows shape.

  According to the above configuration, since the heat transfer tube itself constituting the coiled heat exchanger is configured in a bellows shape, the surface area of the heat transfer tube is increased, and heat exchange with the introduced air introduced from the outside of the housing is performed. Efficiency can be improved.

Circuit diagram showing schematic configuration of gas heat pump refrigeration system The perspective view which shows schematic structure of the outdoor unit of a gas heat pump type freezing apparatus Side sectional view showing schematic configuration of outdoor unit of gas heat pump refrigeration system Side sectional view showing a schematic configuration of a cylindrical coil heat exchanger

Based on FIGS. 1-4, embodiment of the heat pump type freezing apparatus which concerns on this invention is described.
As shown in FIG. 1, a gas heat pump refrigeration apparatus (an example of a heat pump refrigeration apparatus) 50 is configured to be capable of air conditioning (cooling and heating) a space to be air-conditioned (not shown). An example of a device that drives the refrigeration circuit R) The refrigeration circuit R including the compressor 2 driven by 1, the indoor unit 10 disposed in the air-conditioning target space, and the outdoor unit 20 disposed outside the air-conditioning target space It has.

  The refrigeration circuit R is configured by a circulation circuit through which the refrigerant B can circulate, and in the circulation circuit, the compressor 2 that compresses the evaporated refrigerant B and the condenser 3 that condenses the refrigerant B compressed by the compressor 2. An expansion valve 4 for expanding the refrigerant B after being condensed in the condenser 3, an evaporator 5 for evaporating the refrigerant B (condensed refrigerant) after being expanded by the expansion valve 4, and the compressor 2 An accumulator 8 provided between the evaporator 5 and the evaporator 5 is provided. In addition, in FIG. 1, the circuit structure in the case of cooling the air-conditioning object space is shown.

  The indoor unit 10 includes an expansion valve 4 that expands the refrigerant B flowing through a tube (not shown) that forms part of the refrigeration circuit R, and the refrigerant B and air in the air-conditioning target space (not shown). And a fin-tube indoor refrigerant heat exchanger 11 and a blower fan 12 for exchanging heat with each other. As shown in FIG. 1, the indoor-side refrigerant heat exchanger 11 of the indoor unit 10 functions as the evaporator 5 during the cooling operation, but functions as the condenser 3 during the heating operation. In the present embodiment, three indoor units 10 are provided in the gas heat pump refrigeration apparatus 50. However, the number of installed indoor units 10 can be increased or decreased as necessary.

  As shown in FIGS. 1 to 3, the outdoor unit 20 is driven by the gas engine 1 via a substantially rectangular box-shaped casing 21, the gas engine 1, and a belt 1 a (an example of a transmission member). Heat of the compressor 2 and the refrigerant B flowing through the tube 3a constituting a part of the refrigeration circuit R and the introduced air A to evaporate the refrigerant B in a plate-like fin-tube type outdoor refrigerant heat Exchanger (an example of a heat exchanger for refrigerant) 3A, a cooling water circulation path P through which cooling water C for cooling the gas engine 1 flows, and a cooling water C flowing through the cooling water circulation path P are introduced. The cooling water heat exchanging part 23 for exchanging heat with the air A and the introduction air A provided in the upper part of the casing 21 and introduced from the side of the casing 21 to the outside through the upper part of the casing 21 And a blower fan 24 for discharging to a space (not shown). As shown in FIG. 1, the outdoor refrigerant heat exchanger 3A of the outdoor unit 20 functions as the condenser 3 during the cooling operation, but functions as the evaporator 5 during the heating operation. The plate-shaped and fin-tube outdoor refrigerant heat exchanger (an example of a refrigerant heat exchanger) 3A has substantially the same shape and structure.

The housing 21 includes an upper space 20A and a lower space 20B that are divided into two parts by a plate-like partition bottom member 21a inside the housing 21.
The four surrounding surfaces of the lower space 20B are closed by a plate-like wall member 21b, and the gas engine 1, the compressor 2, the accumulator 8, and the like are accommodated in the lower space 20B.

  The upper portion of the upper space 20A is closed by a ceiling wall member 21c, and plate-like wall members 21e are provided on each of two opposing surfaces (short surfaces) of the four surrounding surfaces of the upper space 20A, and the other opposing surfaces. Each of the two surfaces (longitudinal surfaces) is provided with an outdoor refrigerant heat exchanger (an example of a refrigerant heat exchanger) 3A. In other words, the pair of outdoor refrigerant heat exchangers 3A is provided on the side of the upper space 20A of the casing 21, and the flow direction (horizontal direction) of the introduced air A introduced into the upper space 20A. Are arranged so as to be substantially orthogonal.

The ceiling wall member 21c is formed with a pair of openings 21d that penetrates the upper space 20A and the external space in a circular shape. The pair of openings 21d are arranged side by side along the opposing surface of the outdoor refrigerant heat exchanger 3A at a central portion between the opposing surfaces of the pair of outdoor refrigerant heat exchangers 3A in plan view. .
Furthermore, each opening 21d in the ceiling wall member 21c is provided with a blower fan 24 having a rotation axis that is concentric with each opening 21d.

  As shown in FIGS. 1 to 4, the cooling water circulation path P is constituted by a circulation circuit through which the cooling water C can circulate, and the circulation circuit includes the delivery pump 6, the gas engine 1, the cooling water C, and the like. A heat exchanger 23 for cooling water that cools the cooling water C by exchanging heat with the introduced air A introduced into the inside from the side of the upper space 20A is provided.

The heat exchanger 23 for cooling water is formed in a cylindrical shape (that is, formed in a spiral shape) by winding the heat transfer tube 23a through which the cooling water C flows a plurality of times (11 times in FIG. 4). Each gap D formed by the exchanger 23A and formed between the inside of the cylinder of the coiled heat exchanger 23A and the adjacent heat transfer tubes 23a in the axial direction (vertical direction) is formed in the upper space 20A. The introduced introduction air A is configured to be able to flow. The plurality of heat transfer tubes 23a are wound so that the outer diameter and the inner diameter of the cylindrical coiled heat exchanger 23A have substantially the same diameter in the axial direction. Further, the inner diameter of the cylindrical coiled heat exchanger 23A is configured to be slightly larger than the inner diameter of each opening 21d.
The cylindrical coil heat exchanger 23A is formed such that each gap D becomes narrower from the lower side to the upper side. Specifically, among the gaps D, the gaps are formed so that the intervals are sequentially reduced from D1 on the lower side to D2, D3,.
That is, the cylindrical coiled heat exchanger 23A has at least a part of the gaps D formed between the adjacent heat transfer tubes 23a in the axial direction of the cylindrical coiled heat exchanger 23A. D is formed so as to be different in the vertical direction with respect to the gap D of the other part as a reference. In the present embodiment, all the gaps D are formed to have different sizes (intervals) in the vertical direction with respect to other gaps D (reference gaps D).

  The cylindrical coiled heat exchanger 23A is disposed in the upper casing 20A so that the axial direction of the cylindrical heat exchanger is along the vertical direction, and the blower fan is concentric with the rotary shaft of the blower fan 24. 24 is arranged at the bottom. That is, the coiled heat exchanger 23 </ b> A is arranged in a concentric state on the lower side of each blower fan 24. Each coil-shaped heat exchanger 23A is disposed at an intermediate portion between the pair of outdoor refrigerant heat exchangers 3A in the flow direction of the introduced air. The intermediate portion is not limited to the one located at the center between the pair of outdoor refrigerant heat exchangers 3A (the position where the distances from the outdoor refrigerant heat exchangers 3A are completely matched), It is a concept that includes those located at a position slightly deviated from the center toward each outdoor refrigerant heat exchanger 3A side.

The operation of the gas heat pump refrigeration apparatus 50 will be described.
When the operation of the gas engine 1 is started, the compressor 2 is driven via the belt 1a, and the refrigerant B circulates through the refrigeration circuit R. Further, the delivery pump 6 in the cooling water circulation path P is driven, and the cooling water C circulates through the cooling water circulation path P. Further, the blower fan 24 is rotationally driven, and the introduced air A is introduced into the upper space 20A from the outer space via the side portion of the upper space 20A of the housing 21 and discharged into the outer space. This will be specifically described below.

  The refrigerant B in the refrigeration circuit R is compressed by the compressor 2 and then flows through the tubes 3a of the outdoor refrigerant heat exchangers 3A (condenser 3) to enter the upper space 20A of the casing 21. The heat is indirectly exchanged with the introduced introduction air A to be cooled and condensed. The condensed refrigerant B is decompressed by each expansion valve 4 and then flows into each indoor-side refrigerant heat exchanger 11 (evaporator 5) to indirectly exchange heat with air in the air-conditioning target space. The air is heated and evaporated, and the air is cooled to cool the air-conditioning target space. The evaporated refrigerant B flows into the accumulator 8 and is then returned to the compressor 2.

  On the other hand, the cooling water C in the cooling water circulation path P is supplied to the gas engine 1 by the delivery pump 6 to cool the gas engine 1 and then flows into the coil heat exchangers 23A. In the upper space 20A of the body 212, heat is indirectly exchanged with the introduced air A after passing through the outdoor refrigerant heat exchanger 3A, and the body 212 is cooled. The cooled cooling water C is returned to the delivery pump 6.

  On the other hand, by the rotational drive of the blower fan 24, the introduction air A is introduced into the upper space 20A along the substantially horizontal direction from the side portion of the casing 21, and passes through each outdoor refrigerant heat exchanger 3A. At this time, each of the outdoor refrigerant heat exchangers 3A has substantially the same shape, structure, etc., and is disposed at a position facing each other in a state substantially orthogonal to the flow direction of the introduction air A. Therefore, the flow of the introduced air A is less likely to be biased between both positions that have passed through the outdoor refrigerant heat exchanger 3A.

Subsequently, the introduced air A after passing through each outdoor refrigerant heat exchanger 5A is formed between adjacent heat transfer tubes 23a in the vertical direction and continuously formed in a spiral shape in the circumferential direction. Passing through D in a substantially horizontal direction, passing through the inside of the cylindrical coiled heat exchanger 23A in the vertical direction, and being discharged from the inside to the external space via the blower fan 24 and the opening 21d. Become. Therefore, even when the introduced air A passes through the cylindrical coiled heat exchanger 23A through any gap D from any direction except the vertical direction, a problem of uneven flow of the introduced air A occurs. Nothing will happen.
Therefore, by adopting a cylindrical coiled heat exchanger 23A as the cooling water heat exchanging portion 23, the shape and structure of each outdoor refrigerant heat exchanger 3A can be made substantially identical, Even with this configuration, it is possible to prevent the deviation of the flow of the introduced air A and equalize the air volume with a simple apparatus configuration.

Further, the introduction air A introduced into the upper space 20A of the casing 21 by the rotation of the blower fan 24 provided on the ceiling wall member 21c of the casing 21 has a high upper wind speed and a lower lower wind speed. Even in such a tendency, the gaps D formed between adjacent heat transfer tubes 23a of the cylindrical coiled heat exchanger 23A are different from each other in the vertical direction so as to become narrower from the lower side to the upper side. Since it is formed in a size (interval), it is possible to balance so that the upper resistance is relatively large and the lower resistance is relatively small. Thereby, the introduction air A introduced into the inside of the housing 21 can achieve uniform wind speed on both the upper side and the lower side, and the heat exchange capacity can be improved in each part of each outdoor refrigerant heat exchanger 3A. Uniformity can also be achieved.
In other words, among the gaps D formed between the adjacent heat transfer tubes 23a in the axial direction of the cylindrical coiled heat exchanger 23A, at least a part of the gaps D serves as a reference gap D. On the other hand, since they are formed in different sizes (intervals) in the vertical direction, the resistance of the introduced air A that passes through the cylindrical coiled heat exchanger 23A by the rotation of the blower fan 24 provided in the upper part of the housing 21. Can be adjusted to be different in the vertical direction. Thereby, the wind speed of the introduction air A introduced into the inside of the housing 21 can be appropriately adjusted in the vertical direction, and the heat exchanging ability of each refrigerant heat exchanger 3A can be appropriately adjusted in the vertical direction.

  Therefore, in the gas heat pump refrigeration apparatus, the flow of the introduced air A introduced into the housing 21 through the refrigerant heat exchanger 5A and the cooling water heat exchanger 23 is prevented from being biased, the air volume is equalized, and the wind speed Uniformity was achieved.

[Other Embodiments]
(1) In the above-described embodiment, a pair of cylindrical coil heat exchangers 23 </ b> A (an example of a heat exchange unit for cooling water) is provided corresponding to the pair of blower fans 24. If it is in a state, the number of installed cylindrical coiled heat exchangers 23A may be one, or may be three or more. When three or more cylindrical coiled heat exchangers 23A are installed in a state corresponding to each blower fan 24, each coiled heat exchanger 23A is opposed to a pair of outdoor refrigerant heat exchangers 3A. It is preferable to line up along.

(2) In the above-described embodiment, a pair of cylindrical coil heat exchangers 23A (an example of a cooling water heat exchange unit) positioned below each blower fan 24 are opposed to each other in plan view. However, the cylindrical coil heat exchanger 23 </ b> A is exchanged with any one of the outdoor refrigerants in a state of being positioned below each blower fan 24. It is good also as a structure provided in the side close | similar to or spaced apart from the container 3A.

(3) In the above embodiment, the inner diameter of the cylindrical coiled heat exchanger 23A is configured to be slightly larger than the inner diameter of the opening 21d in the ceiling wall member 21c, but the inner diameter of the coiled heat exchanger 23A The outer diameter can be changed as appropriate.
Further, the configuration of the cylindrical coiled heat exchanger 23A, that is, the diameter and the number of turns of the heat transfer tube, can be changed as appropriate.
Further, the heat transfer tube 23a of the cylindrical coiled heat exchanger 23A may be formed in a bellows shape. In this case, the heat exchange efficiency with the introduction air A introduced from the outside of the housing 21 can be improved by increasing the surface area of the heat transfer tube 23a.

(4) In the above-described embodiment, as shown in FIG. 1, in the refrigeration circuit R, the refrigerant B is replaced with the compressor 2, the outdoor refrigerant heat exchanger 3 </ b> A, the expansion valve 4, the indoor refrigerant heat exchanger 11, A configuration in which the accumulator 8 and the compressor 2 are circulated in order, the outdoor refrigerant heat exchanger 3A functions as the condenser 3, and the indoor refrigerant heat exchanger 11 functions as the evaporator 5 to be air-conditioned. The configuration for performing the cooling operation in the space has been described.
On the other hand, although not shown, a four-way valve, an auxiliary evaporator, and the like are provided as appropriate so that the refrigerant B is supplied to the compressor 2, the accumulator 8, the indoor refrigerant heat exchanger 11, the expansion valve 4, and the chamber in the refrigeration circuit R. The outside refrigerant heat exchanger 3A and the compressor 2 are circulated in this order, the indoor refrigerant heat exchanger 11 functions as the condenser 3, and the outdoor refrigerant heat exchanger 3A functions as the evaporator 5. It is good also as a structure which carries out heating operation in the air-conditioning object space.

(5) In the above embodiment, at least a part of the gaps D among the gaps D formed between the adjacent heat transfer tubes 23a in the axial direction of the cylindrical coiled heat exchanger 23A is used as a reference. When forming different sizes (intervals) in the vertical direction with respect to the other gap D, the cylindrical coiled heat exchanger 23A is narrowed so that each gap D goes from the lower side to the upper side. In the gaps D, the gaps D1 are sequentially formed from the lower side D1 to D2, D3,... Although different sizes (intervals) are formed in the vertical direction, the gaps D can be set as appropriate.
For example, among the gaps D formed between the adjacent heat transfer tubes 23a in the axial direction of the cylindrical coiled heat exchanger 23A, at least a part of the gaps D serves as a reference gap D. In contrast, when the gaps D are formed in different sizes (intervals) in the vertical direction, the gaps D are formed so as to become narrower at intervals of plural intervals from the lower side to the upper side. It is good also as a structure which forms the gap | interval D group which forms another some space | interval with respect to the gap | interval D group to form in a mutually different magnitude | size (interval).
Further, for example, among the gaps D formed between the adjacent heat transfer tubes 23a in the axial direction of the cylindrical coiled heat exchanger 23A, at least a part of the gaps D based on at least a part of the gaps D is used. When forming different sizes (intervals) in the vertical direction with respect to D, each gap D positioned in the upper part is positioned between other parts serving as a reference (for example, between the upper part and the lower part) Each gap D) is formed so as to become narrower sequentially from the lower side to the upper side, and each gap D located in the lower part is formed narrower than the reference interval of other parts. You can also.
Furthermore, for example, the interval between the gaps D can be set to a constant interval.

(6) In the above embodiment, the outdoor refrigerant heat exchanger 3 </ b> A is provided on each of the opposite side portions of the side portion of the casing 21, but in addition to this, of the side portions of the casing 21 It is good also as a structure which provides 3A of plate-shaped fin tube type outdoor refrigerant | coolant heat exchangers in another side part.

(7) In the above embodiment, the compressor 2 constituting the refrigeration circuit R is mechanically started by the gas engine (an example of a device that drives the compressor) 1 via the belt 1a. As a device that drives the compressor 2, the compressor 2 can be driven satisfactorily, and a fuel cell or the like can be used as long as the device generates exhaust heat by the drive. In this case, the compressor 2 is driven by electric power generated from the fuel cell or the like.

  As described above, the heat pump type that can realize the prevention of uneven pressure loss of the introduced air introduced into the casing through the heat exchanger for refrigerant and the heat exchanger for cooling water and uniform air flow with a simple configuration. A refrigeration apparatus can be provided.

1 Gas engine (equipment that drives the compressor)
2 Compressor 3 Condenser 4 Expansion valve 5 Evaporator 3A Heat exchanger for outdoor refrigerant (heat exchanger for refrigerant)
3a Tube 21 Case 21c Ceiling wall member (upper part of case)
21d Opening 23 Cooling Water Heat Exchanger 23A Cylindrical Coiled Heat Exchanger (Cooling Water Heat Exchanger)
23a Heat transfer tube 24 Blower fan 50 Gas heat pump refrigeration system (heat pump refrigeration system)
A Introduction air B Refrigerant C Cooling water R Refrigeration circuit P Cooling water circulation path D Gap

Claims (4)

A housing,
A blower fan that is provided at an upper portion of the casing and discharges the introduction air introduced into the inside from a side portion of the casing to an external space through the upper portion of the casing;
A refrigeration circuit with a compressor;
A fin-tube refrigerant heat exchanger that exchanges heat between the refrigerant flowing through the tube of the refrigeration circuit and the introduced air;
A cooling water circulation path through which cooling water for cooling the device driving the compressor flows;
A heat pump refrigeration apparatus comprising: a cooling water heat exchange section that exchanges heat between the cooling water flowing through the cooling water circulation path and the introduced air;
At least a pair of the heat exchangers for refrigerant is disposed on each of opposite side portions of the side portion of the casing,
The cooling water heat exchanging section is constituted by a coiled heat exchanger formed in a cylindrical shape by winding a heat transfer tube through which the cooling water flows a plurality of times. A heat pump type refrigeration apparatus disposed downstream of the pair of refrigerant heat exchangers in the air flow direction and so that an axial direction is along the vertical direction.   Of the gaps formed between adjacent ones of the heat transfer tubes adjacent to each other in the axial direction of the cylindrical coiled heat exchanger, at least a part of the gaps is in the vertical direction with respect to the gaps of the other part. The heat pump refrigeration apparatus according to claim 1, wherein the heat pump refrigeration apparatus is formed differently.   The cylindrical coil-shaped heat exchanger is disposed on the lower side of the blower fan with its axial direction being concentric with the rotational axis of the blower fan, and each is formed with the same structure The heat pump refrigeration apparatus according to claim 1, wherein the heat pump refrigeration apparatus is disposed between the pair of refrigerant heat exchangers.   The heat pump refrigeration apparatus according to any one of claims 1 to 3, wherein the heat transfer tube constituting the cylindrical coiled heat exchanger is formed in a bellows shape.

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