JP2005351528A

JP2005351528A - Refrigerating device

Info

Publication number: JP2005351528A
Application number: JP2004171711A
Authority: JP
Inventors: Yukio Yamaguchi; 幸雄山口
Original assignee: Sanden Corp
Current assignee: Sanden Corp
Priority date: 2004-06-09
Filing date: 2004-06-09
Publication date: 2005-12-22

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerating device requiring smaller space and lower manufacturing cost than a conventional refrigerating device. <P>SOLUTION: The refrigerating device comprises a compressor, a radiator, an expansion valve, and a heat absorber. A heat radiating pipe in which high temperature refrigerant discharged from the compressor flows and a heat absorbing pipe in which low temperature refrigerant to be returned to the compressor flows are arranged in the radiator. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、冷凍装置に関するものである。 The present invention relates to a refrigeration apparatus.

圧縮機と、放熱器と、膨張弁と、吸熱器とを備え、更に、圧縮機から吐出した高温冷媒が流れる放熱用配管と吸熱器から圧縮機へ戻される低温冷媒が流れる吸熱用配管とが隣接配置された内部熱交換器を備える冷凍装置が特許文献１に開示されている。
圧縮機から吐出した高温冷媒と吸熱器から圧縮機へ戻される低温冷媒との間で熱交換を行うことにより、高温冷媒の凝縮が促進されて冷凍装置の熱効率が向上すると共に、圧縮機の液圧縮が防止されて冷凍装置の耐久性が向上する。
特開２００１−１０８３１７ A compressor, a radiator, an expansion valve, and a heat absorber; and a heat radiation pipe through which the high-temperature refrigerant discharged from the compressor flows and a heat absorption pipe through which the low-temperature refrigerant returned from the heat absorber to the compressor flows. Patent Document 1 discloses a refrigeration apparatus including an internal heat exchanger that is disposed adjacently.
By exchanging heat between the high-temperature refrigerant discharged from the compressor and the low-temperature refrigerant returned from the heat absorber to the compressor, condensation of the high-temperature refrigerant is promoted and the thermal efficiency of the refrigeration apparatus is improved. Compression is prevented and the durability of the refrigeration apparatus is improved.
JP 2001-108317 A

特許文献１の冷凍装置には、内部熱交換器の設置スペースを必要とするという問題がある。内部熱交換器には一般に構造が複雑で高価な二重管（内側の管を高温冷媒が流れ、外側の管を低温冷媒が流れる）が使用されるので、特許文献１の冷凍装置には製造コストが高いという問題がある。
本発明は上記問題に鑑みてなされたものであり、特許文献１の冷凍装置に比べて、省スペースであり、製造コストが低い冷凍装置を提供することを目的とする。 The refrigeration apparatus of Patent Document 1 has a problem of requiring an installation space for an internal heat exchanger. Since the internal heat exchanger generally uses a complicated and expensive double pipe (a high-temperature refrigerant flows through the inner pipe and a low-temperature refrigerant flows through the outer pipe), the refrigeration apparatus of Patent Document 1 is manufactured. There is a problem that the cost is high.
The present invention has been made in view of the above problems, and an object thereof is to provide a refrigeration apparatus that is space-saving and low in manufacturing cost as compared with the refrigeration apparatus of Patent Document 1.

上記課題を解決するために、本発明においては、圧縮機と、放熱器と、膨張弁と、吸熱器とを備え、圧縮機から吐出した高温冷媒が流れる放熱用配管と吸熱器から圧縮機へ戻される低温冷媒が流れる吸熱用配管とが放熱器に配設されていることを特徴とする冷凍装置を提供する。
本発明に係る冷凍装置においては、放熱器を内部熱交換器として利用するので、内部熱交換器を別途配設する必要が無くなる。この結果、特許文献１の冷凍装置に比べて省スペースとなる。放熱器に配設する放熱用配管と吸熱用配管とは単に隣接して配設すれば良いので、高価な二重管が不要となる。この結果、特許文献１の冷凍装置に比べて製造コストが低減する。 In order to solve the above-described problems, in the present invention, a compressor, a radiator, an expansion valve, and a heat absorber are provided, and a heat-dissipating pipe and high-temperature refrigerant discharged from the compressor flow from the heat absorber to the compressor. Provided is a refrigerating apparatus in which a heat absorbing pipe through which a returned low-temperature refrigerant flows is arranged in a radiator.
In the refrigeration apparatus according to the present invention, since the radiator is used as the internal heat exchanger, it is not necessary to separately provide the internal heat exchanger. As a result, space is saved as compared with the refrigeration apparatus of Patent Document 1. Since the heat dissipating pipe and the heat absorbing pipe disposed in the radiator need only be disposed adjacent to each other, an expensive double pipe is not required. As a result, the manufacturing cost is reduced as compared with the refrigeration apparatus of Patent Document 1.

本発明の好ましい態様においては、吸熱用配管が放熱用配管に対して通風の上流側に配設されている。
本発明の好ましい態様においては、吸熱用配管と放熱用配管とが、通風方向に直交する方向に交互に配設されている。
本発明の好ましい態様においては、通風の上流側と下流側とに放熱用配管が配設され、通風の中流に吸熱用配管が配設されている。
吸熱用配管と放熱用配管の相対位置関係は、吸熱用配管が放熱用配管に対して通風の上流側に配設されたものでも良く、吸熱用配管と放熱用配管とが、通風方向に直交する方向に交互に配設されたものでも良く、通風の上流側と下流側とに放熱用配管が配設され、通風の中流に吸熱用配管が配設されたものでも良い。 In a preferred embodiment of the present invention, the endothermic pipe is disposed on the upstream side of the ventilation with respect to the heat radiating pipe.
In a preferred embodiment of the present invention, the heat absorption pipes and the heat radiation pipes are alternately arranged in a direction orthogonal to the ventilation direction.
In a preferred embodiment of the present invention, heat radiation pipes are arranged on the upstream side and downstream side of the ventilation, and heat absorption pipes are arranged in the midstream of the ventilation.
The relative positional relationship between the heat absorption pipe and the heat radiation pipe may be that the heat absorption pipe is disposed upstream of the ventilation with respect to the heat radiation pipe, and the heat absorption pipe and the heat radiation pipe are orthogonal to the ventilation direction. Alternatively, the heat dissipating pipe may be arranged on the upstream side and the downstream side of the ventilation, and the heat absorbing pipe may be arranged in the middle of the ventilation.

本発明の好ましい態様においては、冷媒は二酸化炭素である。
二酸化炭素は、自然環境保護の観点から望ましい冷媒であるが、臨界温度が低いので、圧縮機から吐出した高温ガスの凝縮を促進し、冷凍装置の熱効率を向上させる観点から、圧縮機から吐出した高温ガスと放熱器から圧縮機へ戻される低温ガスとの間で熱交換を行うのが望ましい。 In a preferred embodiment of the invention, the refrigerant is carbon dioxide.
Carbon dioxide is a desirable refrigerant from the viewpoint of protecting the natural environment, but since it has a low critical temperature, it has been discharged from the compressor from the viewpoint of promoting the condensation of high-temperature gas discharged from the compressor and improving the thermal efficiency of the refrigeration system. It is desirable to exchange heat between the hot gas and the cold gas returned from the radiator to the compressor.

本発明に係る冷凍装置においては、放熱器を内部熱交換器として利用するので、内部熱交換器を別途配設する必要が無くなる。この結果、特許文献１の冷凍装置に比べて省スペースとなる。放熱器に配設する放熱用配管と吸熱用配管とは単に隣接して配設すれば良いので、高価な二重管が不要となる。この結果、特許文献１の冷凍装置に比べて製造コストが低減する。 In the refrigeration apparatus according to the present invention, since the radiator is used as the internal heat exchanger, it is not necessary to separately provide the internal heat exchanger. As a result, space is saved as compared with the refrigeration apparatus of Patent Document 1. Since the heat dissipating pipe and the heat absorbing pipe disposed in the radiator need only be disposed adjacent to each other, an expensive double pipe is not required. As a result, the manufacturing cost is reduced as compared with the refrigeration apparatus of Patent Document 1.

本発明の実施例に係る冷凍装置を説明する。 A refrigerating apparatus according to an embodiment of the present invention will be described.

図１に示すように、冷凍装置Ａは、圧縮機１と、放熱器２と、ドライヤー３と、膨張弁４と、吸熱器５と、逆止弁６と、これらの機器を接続する配管７とを備えている。
圧縮機１から吐出した高温冷媒が流れる放熱用配管７ａと、吸熱器５から圧縮機１へ戻される低温冷媒が流れる吸熱用配管７ｂとが放熱器２に配設されている。
放熱器２における放熱用配管７ａと吸熱用配管７ｂとの相対位置関係は、図２（ａ）に示すように、吸熱用配管７ｂが放熱用配管７ａに対して、実線矢印で示す通風の、上流側に配設されている。吸熱用配管７ｂと放熱用配管７ａとはフィン８により連結されている。 As shown in FIG. 1, the refrigeration apparatus A includes a compressor 1, a radiator 2, a dryer 3, an expansion valve 4, a heat absorber 5, a check valve 6, and a pipe 7 connecting these devices. And.
A heat dissipating pipe 7 a through which the high-temperature refrigerant discharged from the compressor 1 flows and a heat absorbing pipe 7 b through which the low-temperature refrigerant returned from the heat absorber 5 to the compressor 1 are disposed in the radiator 2.
As shown in FIG. 2 (a), the relative positional relationship between the heat radiation pipe 7a and the heat absorption pipe 7b in the radiator 2 is such that the heat absorption pipe 7b has a ventilation flow indicated by a solid line arrow with respect to the heat radiation pipe 7a. Arranged upstream. The heat absorption pipe 7 b and the heat radiation pipe 7 a are connected by fins 8.

冷凍装置Ａにおいては、圧縮機１で圧縮されて高温高圧となった冷媒は、放熱器２に配設された放熱用配管７ａを通り放熱されて凝縮され、ドライヤー３で冷媒中の水分が除去され、膨張弁４を通って例えば−１０℃の低温低圧のガスとなり、吸熱器５で吸熱して冷却作用を発揮する。
吸熱器５で吸熱した例えば０℃の低温低圧ガスは、放熱器２に配設された吸熱用配管７ｂを通り、フィン８を介して放熱用配管７ａを通る高温高圧ガスと熱交換して例えば３０℃の中温低圧ガスとなり、圧縮機１に吸引される。
圧縮機１から吐出した高温高圧の冷媒ガスは、放熱器２の放熱用配管７ａを流れ、送風により冷却されて例えば４５℃の中温高圧ガスとなり、更に、吸熱用配管７ｂを流れる低温低圧のガスとフィン８を介して熱交換して、例えば３０℃まで冷却される。 In the refrigeration apparatus A, the refrigerant that has been compressed by the compressor 1 to high temperature and high pressure is radiated and condensed through the heat radiation pipe 7 a disposed in the radiator 2, and moisture in the refrigerant is removed by the dryer 3. Then, it passes through the expansion valve 4 to become a low-temperature and low-pressure gas of, for example, −10 ° C., and absorbs heat by the heat absorber 5 to exert a cooling action.
The low-temperature low-pressure gas, for example, 0 ° C. that has absorbed heat in the heat absorber 5 passes through the heat-absorbing pipe 7b disposed in the radiator 2 and exchanges heat with the high-temperature high-pressure gas that passes through the heat-radiating pipe 7a via the fins 8, for example. The medium temperature low pressure gas at 30 ° C. is sucked into the compressor 1.
The high-temperature and high-pressure refrigerant gas discharged from the compressor 1 flows through the heat radiation pipe 7a of the radiator 2 and is cooled by air blowing to become, for example, a medium-temperature high-pressure gas of 45 ° C. Further, the low-temperature and low-pressure gas flowing through the heat absorption pipe 7b The heat is exchanged through the fins 8 and cooled to 30 ° C., for example.

冷凍装置Ａにおいては、圧縮機１から吐出した高温冷媒と吸熱器５から圧縮機１へ戻される低温冷媒との間で熱交換が行われることにより、高温冷媒の凝縮が促進されて冷凍装置の熱効率が向上すると共に、圧縮機１の液圧縮が防止されて冷凍装置の耐久性が向上している。
冷凍装置Ａにおいては、放熱器２を、圧縮機１から吐出した高温冷媒と吸熱器５から圧縮機１へ戻される低温冷媒との間で熱交換を行う内部熱交換器として利用しているので、内部熱交換器を別途配設する必要が無い。この結果、冷凍装置Ａは、特許文献１の冷凍装置に比べて省スペースとなっている。放熱器２に配設する放熱用配管７ａと吸熱用配管７ｂとは単に隣接して配設すれば良いので、高価な二重管は不要である。この結果、冷凍装置Ａの製造コストは、特許文献１の冷凍装置に比べて低減している。
吸熱用配管７ｂが放熱用配管７ａに対して通風の上流側に配設されているので、通風の下流側に配設された放熱用配管７ａを流れる高温冷媒は、吸熱用配管７ｂを流れる低温冷媒とフィン８を介して熱交換して冷却されると共に、通風の上流側に配設された吸熱用配管７ｂを流れる低温冷媒と熱交換して冷却された空気と熱交換して冷却される。この結果、圧縮機１から吐出した冷媒の凝縮が促進され、冷凍装置Ａの熱効率が向上する。 In the refrigeration apparatus A, heat exchange is performed between the high-temperature refrigerant discharged from the compressor 1 and the low-temperature refrigerant returned from the heat absorber 5 to the compressor 1, whereby condensation of the high-temperature refrigerant is promoted and the refrigeration apparatus While improving thermal efficiency, the liquid compression of the compressor 1 is prevented and the durability of the refrigeration apparatus is improved.
In the refrigeration apparatus A, the radiator 2 is used as an internal heat exchanger that exchanges heat between the high-temperature refrigerant discharged from the compressor 1 and the low-temperature refrigerant returned from the heat absorber 5 to the compressor 1. There is no need to separately provide an internal heat exchanger. As a result, the refrigeration apparatus A saves space compared to the refrigeration apparatus disclosed in Patent Document 1. Since the heat radiating pipe 7a and the heat absorbing pipe 7b disposed in the radiator 2 may be simply disposed adjacent to each other, an expensive double pipe is unnecessary. As a result, the manufacturing cost of the refrigeration apparatus A is reduced as compared with the refrigeration apparatus of Patent Document 1.
Since the heat absorption pipe 7b is disposed upstream of the ventilation with respect to the heat radiation pipe 7a, the high-temperature refrigerant flowing through the heat radiation pipe 7a disposed downstream of the ventilation is low temperature flowing through the heat absorption pipe 7b. The refrigerant is cooled by exchanging heat through the fins 8 and is also cooled by exchanging heat with the air cooled by heat exchange with the low-temperature refrigerant flowing through the heat absorption pipe 7b disposed on the upstream side of the ventilation. . As a result, condensation of the refrigerant discharged from the compressor 1 is promoted, and the thermal efficiency of the refrigeration apparatus A is improved.

図２（ｂ）に示すように、吸熱用配管７ｂと放熱用配管７ａとを、実線矢印で示す通風方向に直交する方向に交互に配設しても良い。吸熱用配管７ｂと放熱用配管７ａとの間隔が狭まることにより、放熱用配管７ａを流れる高温冷媒と吸熱用配管７ｂを流れる低温冷媒とのフィン８を介する熱交換が促進され、圧縮機１から吐出した冷媒の凝縮が促進され、冷凍装置Ａの熱効率が向上する。
図２（ｃ）に示すように、通風の上流側と下流側とに放熱用配管７ａを配設し、通風の中流に吸熱用配管７ｂを配設しても良い。吸熱用配管７ｂと放熱用配管７ａとの間隔が狭まることにより、放熱用配管７ａを流れる高温冷媒と吸熱用配管７ｂを流れる低温冷媒とのフィン８を介する熱交換が促進され、またフィン８の配設数が増加することにより、放熱用配管７ａを流れる高温冷媒と吸熱用配管７ｂを流れる低温冷媒とのフィン８を介する熱交換が促進され、圧縮機１から吐出した冷媒の凝縮が促進され、冷凍装置Ａの熱効率が向上する。
冷凍装置Ａの構成は、二酸化炭素を冷媒として使用する冷凍装置に適している。二酸化炭素は、自然環境保護の観点から望ましい冷媒であるが、臨界温度が低いので、圧縮機から吐出した高温ガスの凝縮を促進し、冷凍装置の効率を向上させる観点から、圧縮機から吐出する高温ガスと放熱器から圧縮機へ戻される低温ガスとの間で熱交換を行うのが望ましい。 As shown in FIG. 2B, the heat absorbing pipes 7b and the heat radiating pipes 7a may be alternately arranged in a direction perpendicular to the ventilation direction indicated by the solid line arrows. By reducing the distance between the heat absorbing pipe 7b and the heat radiating pipe 7a, heat exchange through the fins 8 between the high temperature refrigerant flowing through the heat radiating pipe 7a and the low temperature refrigerant flowing through the heat absorbing pipe 7b is promoted. Condensation of the discharged refrigerant is promoted, and the thermal efficiency of the refrigeration apparatus A is improved.
As shown in FIG. 2 (c), the heat radiating pipe 7a may be disposed on the upstream side and the downstream side of the ventilation, and the heat absorbing pipe 7b may be disposed in the midstream of the ventilation. By reducing the distance between the heat absorbing pipe 7b and the heat radiating pipe 7a, heat exchange via the fin 8 between the high temperature refrigerant flowing through the heat radiating pipe 7a and the low temperature refrigerant flowing through the heat absorbing pipe 7b is promoted. By increasing the number of arrangements, heat exchange between the high-temperature refrigerant flowing through the heat radiation pipe 7a and the low-temperature refrigerant flowing through the heat absorption pipe 7b via the fins 8 is promoted, and condensation of the refrigerant discharged from the compressor 1 is promoted. The thermal efficiency of the refrigeration apparatus A is improved.
The configuration of the refrigeration apparatus A is suitable for a refrigeration apparatus that uses carbon dioxide as a refrigerant. Carbon dioxide is a desirable refrigerant from the viewpoint of protecting the natural environment, but since it has a low critical temperature, it is discharged from the compressor from the viewpoint of promoting the condensation of high-temperature gas discharged from the compressor and improving the efficiency of the refrigeration apparatus. It is desirable to exchange heat between the hot gas and the cold gas returned from the radiator to the compressor.

本発明は冷凍装置に広く利用可能である。 The present invention is widely applicable to refrigeration equipment.

本発明の実施例に係る冷凍装置のブロック図である。1 is a block diagram of a refrigeration apparatus according to an embodiment of the present invention. 本発明の実施例に係る冷凍装置が備える放熱器内の配管配置図である。It is piping arrangement | positioning drawing in the heat radiator with which the refrigeration apparatus based on the Example of this invention is provided.

Explanation of symbols

１圧縮機
２放熱器
３ドライヤー
４膨張弁
５吸熱器
６逆止弁
７配管
７ａ放熱用配管
７ｂ吸熱用配管
８フィン DESCRIPTION OF SYMBOLS 1 Compressor 2 Radiator 3 Dryer 4 Expansion valve 5 Heat absorber 6 Check valve 7 Pipe 7a Heat radiation pipe 7b Heat absorption pipe 8 Fin

Claims

A heat sink having a compressor, a heat radiator, an expansion valve, and a heat absorber, and a heat radiation pipe through which the high-temperature refrigerant discharged from the compressor flows and a heat absorption pipe through which the low-temperature refrigerant returned from the heat absorber to the compressor flow It is arrange | positioned by the freezing apparatus characterized by the above-mentioned.

The refrigerating apparatus according to claim 1, wherein the heat absorption pipe is disposed upstream of the ventilation with respect to the heat radiation pipe.

The refrigeration apparatus according to claim 1, wherein the heat absorption pipe and the heat radiation pipe are alternately arranged in a direction orthogonal to the ventilation direction.

2. The refrigeration apparatus according to claim 1, wherein heat dissipating pipes are disposed on an upstream side and a downstream side of the ventilation, and an endothermic pipe is disposed on a midstream of the ventilation.

The refrigerating apparatus according to any one of claims 1 to 4, wherein the refrigerant is carbon dioxide.