Refrigerating apparatus

A refrigeration device and refrigerant technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as functioning

Inactive Publication Date: 2010-05-19
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] And, although the heating operation of the refrigeration cycle using the outdoor heat exchanger 107 as the evaporator can also be performed in the above-mentioned refrigeration device, since the suction pressure of the compressor 106 will act on the pressure reducing valve 117 in this case, the pressure is reduced. Valve 117 will open

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1 of the present invention will be described below. The refrigerant circuit diagram of the refrigeration device 1 involved in the present embodiment 1 is as follows: figure 1 shown. This refrigerating device 1 is installed in a convenience store and is used for cooling the refrigerated display case and the refrigerated display case, and supplying air and cold air in the store.

[0063] The refrigerating device 1 includes: an outdoor unit (heat source side unit) 10, an indoor unit (second use side unit) 20, a refrigerating unit (first use side unit) 30, and a refrigerating unit (first use side unit) 40, The units 10, 20, 30, 40 are connected by gas-side connecting pipes 51, 52 and liquid-side connecting pipes 53, 54, 55 to constitute a refrigerant circuit 50 of a vapor compression refrigeration cycle.

[0064] The gas side connecting pipes 51 and 52 are composed of a first gas side connecting pipe (low-pressure gas pipe) 51 connecting the outdoor unit 10 , ...

Embodiment 2

[0171] Embodiment 2 of the present invention will be described below. The refrigerant circuit diagram of the refrigerating device 1 related to this embodiment 2 is as follows Figure 11 shown. The refrigerating device 1 of this embodiment 2 is different from the above-mentioned embodiment 1 in that the hot gas bypass pipe 71 is not provided with a solenoid valve SV1, and the second four-way reversing valve 13 as a communication mechanism constitutes the refrigerant return mechanism 5 .

[0172] The operation of returning the liquid refrigerant in liquid receiver 17 to the circulation path in the first heating and cooling operation will be described below. In the refrigeration system 1 of the second embodiment, when the degree of superheat of the refrigerant flowing through the suction pipe 61a detected from the detection value of the low-pressure pressure sensor 79 and the detection value of the suction temperature sensor 81 becomes a predetermined value or more, Then ...

Embodiment 3

[0177] Embodiment 3 of the present invention will be described below. The refrigerant circuit diagram of the refrigerating device 1 related to this embodiment 3 is as follows: Figure 12 shown. The refrigeration system 1 of the third embodiment is different from the first embodiment in that the hot gas bypass pipe 71 and the solenoid valve SV1 are not provided, and in the connection position of the liquid injection pipe 67 .

[0178] One end of the liquid injection pipe 67 is connected to the connecting portion of the suction pipe 61a and the low-pressure air pipe 64, and the other end of the liquid injection pipe 67 is connected to the connection point of the auxiliary liquid pipe 65 in the outdoor liquid pipe 62 and the closing valve 18c side and Between the liquid receiver 17. The liquid injection pipe 67 is a communication pipe for connecting the liquid receiver 17 to the suction side of the compression mechanism 11D, and constitutes the refrigerant return mechanism...

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Abstract

A refrigerating apparatus comprising a refrigerant return mechanism (5) for returning a liquid refrigerant in a receiver (17) to a circulation route. Accordingly, the liquid refrigerant in the receiver (17) can be forcibly returned to the circulation route in such an operating state that the circulation route for the refrigerant is formed to return the refrigerant fed from compression mechanisms (11D, 11E) from a second use side unit (20) to the compression mechanisms (11D, 11E) through first use side units (30, 40).

Description

technical field [0001] The present invention relates to a refrigerating device, and more particularly to a refrigerating device having a plurality of use-side heat exchangers for refrigerating / freezing and air-conditioning and capable of performing 100% heat recovery operation among the use-side heat exchangers . Background technique [0002] Freezers which carry out a refrigeration cycle are known. This refrigerating device is widely used as an air conditioner for cooling and heating a room, or as a cooler for a display case for refrigerating and freezing food and the like. Some of such refrigeration devices perform both air-conditioning and refrigeration / freezing (for example, refer to Patent Document 1). This refrigerating device is installed in a convenience store, for example, and only one refrigerating device is installed to perform air conditioning and cooling of display cases in the store. [0003] The refrigerating apparatus includes a plurality of use-side heat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00F25B5/02F25B43/00
CPCF25B2313/007F25B2500/07F25B13/00F25B2500/24F25B2313/023F25B2700/21152F25B2313/02732F25B2500/31F25B2400/16F25B2400/22F25B2313/02741F25B1/10F25B2400/0751F25B1/00F25B43/00F25B5/02F25B5/00
Inventor 竹上雅章近藤东谷本宪治
Owner DAIKIN IND LTD
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