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Freezing device

A refrigeration device and refrigerant technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of insufficient refrigerant quantity tendency, cooling capacity, heating capacity decline, etc., and achieve the effect of eliminating refrigerant accumulation

Inactive Publication Date: 2009-06-03
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, if a large amount of refrigerant accumulates in the use-side heat exchanger, the amount of refrigerant sent to the other use-side units tends to be insufficient, resulting in a problem of reduced cooling and heating capabilities.

Method used

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Embodiment Construction

[0034] Embodiments of the present invention will be described in detail below with reference to the drawings.

[0035] The refrigerating device 10 according to the present embodiment is installed in a convenience store or the like, and is a device that simultaneously cools a refrigerator and a freezer and adjusts indoor temperature.

[0036] As shown in FIG. 1 , the refrigerating device 10 includes an outdoor unit 11 , an air-conditioning unit 12 , a refrigerated showcase 13 and a refrigerated showcase 14 . The outdoor unit 11 is provided with an outdoor circuit 40 constituting a heat source side circuit. The air conditioning unit 12 is provided with an air conditioning circuit 70 constituting a first utilization side circuit. The refrigeration showcase 13 is provided with the refrigeration circuit 80 which comprises the 2nd use side circuit. The refrigeration showcase 14 is provided with the refrigeration circuit 90 which comprises the 3rd utilization side circuit. In this...

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Abstract

The present invention discloses a freezing device. In a refrigerant circuit (20), an air conditioner unit (12), a refrigerating showcase (13), and a freezing showcase (14) are parallelly connected to an outdoor unit (11). To set an indoor heat exchanger (71) of the air conditioner unit (12) to a thermo-off state, opening degree control means (101) totally closes an indoor expansion valve (72). After that, the opening degree control means (101) detects the amount of refrigerant staying in the indoor heat exchanger (71) and adjusts the degree of opening of the indoor expansion valve (72) according to the amount of refrigerant.

Description

technical field [0001] The present invention relates to a refrigerating apparatus having a plurality of utilization units, and particularly relates to a method for preventing accumulation of refrigerant in a heating heat exchanger in a state of rest. Background technique [0002] Conventionally, refrigeration devices that circulate refrigerant to perform a refrigeration cycle have been widely used in air conditioners and the like. As this type of refrigerating apparatus, a so-called multi-type refrigerating apparatus in which a plurality of utilization-side units are connected in parallel to a heat source-side unit is known. [0003] For example, the refrigeration system of Patent Document 1 includes one heat source unit having a compressor and a heat source side heat exchanger, and two utilization side units each having a utilization side heat exchanger (heating heat exchanger) and an expansion valve. [0004] In this refrigerating apparatus, each expansion valve is opened...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B13/00F24F11/02
CPCF25B2313/0231F25B13/00F25B2313/0314F25B2600/2513F25B2700/04F25B2400/19F25B2313/0233F25B2313/02743F25B2400/22F25B2400/0751F25B1/10F24F3/06F24F5/001F24F11/63
Inventor 竹上雅章野村和秀近藤东小田吉成谷本憲治
Owner DAIKIN IND LTD
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