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Refrigerating device

A refrigeration device and refrigerant circuit technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of complicated refrigerant temperature control and so on

Inactive Publication Date: 2007-08-08
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there is a problem of complicating the temperature control of the refrigerant in each heat exchanger.
[0006] The above problems become more prominent when the air-conditioning heat exchanger and the refrigeration heat exchanger are connected to the refrigerant circuit on the high-end side with a larger difference in temperature range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

The refrigerating device (10) according to the first embodiment is installed in a convenience store or the like, and performs temperature adjustment in the store and cooling in a merchandise showcase at the same time. The refrigerating device (10) includes a high-stage refrigerant circuit (8) and a low-stage refrigerant circuit (9), and performs a binary refrigeration cycle.

[0046] As shown in Fig. 1, the freezing device (10) includes an outdoor unit (11), an air conditioning unit (12), first and second refrigeration units (13, 14), a refrigeration unit (15) and a pressurization unit (16). The outdoor unit (11) is set outdoors. And other units (12, 13, ...) are all arranged in stores such as convenience stores.

[0047] An outdoor unit (11) is provided with an outdoor circuit (1a) on the high section side and an outdoor circuit (1b) on the low section side. An air-conditioning circuit (2) is provided in the air-conditioning unit (12). First and second refrigeration circuit...

Embodiment 2

The configuration of the refrigerant circuit of the refrigeration system (10) according to the second embodiment is different from that of the refrigeration system according to the above-mentioned first embodiment. Only the points different from the first embodiment above will be described below.

[0139] As shown in Fig. 7, only one four-way reversing valve (37) is provided in the outdoor circuit (1a) on the high section side of the outdoor unit (11). The four-way reversing valve (37) is that the first port of the four-way reversing valve (37) is connected with the main discharge pipe (62), and the second port of the four-way reversing valve (37) is connected with the main suction pipe ( 61) connection, the third port of the four-way reversing valve (37) is connected to the first connecting pipe (21) through the first cut-off valve (51), the fourth port of the four-way reversing valve (37) is connected to the stage One end of the first heat exchange part (41) of the type heat...

Embodiment 3

The configuration of the refrigerant circuit of the refrigeration system (10) according to the third embodiment is different from that of the refrigeration system according to the above-mentioned first embodiment. Only the points different from the first embodiment above will be described below.

[0164] As shown in FIG. 11 , in the outdoor circuit ( 1 b ) on the low side of the outdoor unit ( 11 ), the difference from Embodiment 1 is that an outdoor heat exchanger ( 60 ) on the low side is provided. The outdoor heat exchanger (60) on the low stage side is connected in series with the second heat exchange part (42) of the cascade heat exchanger (40). In addition, the second heat exchange part (42) of the cascaded heat exchanger (40) is different from the second embodiment, and is arranged on the downstream side of the outdoor heat exchanger (60) on the lower stage side.

[0165] Specifically, one end of the low-stage outdoor heat exchanger (60) is connected to the fourth conne...

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Abstract

A refrigerating device. A heat exchanger (45) for air conditioning, in which indoor cooling and heating are switched between each other, is provided only in a high-stage-side refrigerant circuit (8). On the other hand, heat exchangers (47a, 47b, 49) for cooling, which cool inside a cold storage, are provided only in a low-stage-side refrigerant circuit (9).

Description

technical field [0001] The present invention relates to a refrigerating device. The refrigerating device comprises a refrigerant circuit on the high-stage side (the so-called refrigerant circuit on the high-stage side refers to a refrigerant circuit with a relatively high utilization temperature of the heat exchanger) and a refrigerant circuit on the low-stage side. The refrigerant circuits (the so-called low-side refrigerant circuit refers to the refrigerant circuit with a relatively low utilization temperature of the heat exchanger) are connected through cascade heat exchangers and perform a binary refrigeration cycle. Background technique Conventionally, freezers that are suitable for use in convenience stores, for example, and perform indoor cooling and heating operations, and cooling in refrigerators and freezers are known. The above-mentioned refrigerating apparatus includes a refrigerating apparatus in which a high-stage refrigerant circuit and a low-stage refrigeran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B29/00F25B7/00F25B13/00
CPCY02B30/741F25B13/00F25B7/00F25B2600/021F25B2400/22F25B2400/0751F25B1/10Y02B30/70
Inventor 竹上雅章阪江觉谷本宪治
Owner DAIKIN IND LTD
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