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Refrigeration device

A refrigeration device and refrigerant technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems that the capacity will not be fully exerted, the flow of refrigerant refrigerant is insufficient, etc.

Active Publication Date: 2011-05-04
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, if there are multiple utilization units when the pressure difference between the inlet and outlet of the utilization side circuit is small, the refrigerant flow rate in the utilization units at a height where the refrigerant is relatively difficult to flow may not be sufficient, and the utilization Possibility that the capacity of the crew will not be fully utilized

Method used

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Examples

Experimental program
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other Embodiment approach

[0122] In this embodiment, the air conditioner 20 is configured such that an operator or the like inputs the maximum height difference (ΔH) between the installation position of the outdoor unit 64 and the installation position of the indoor unit 61 on the lowest floor. The machine 20 can also be configured to automatically identify the maximum height difference (ΔH).

[0123] In the above embodiments, there may be multiple outdoor units 64 . As for the opening degree of the outdoor expansion valve 36 in each outdoor unit 64 during cooling operation, in the case of the air conditioner 20 of the first embodiment, in order to maintain the pressure loss of the refrigerant at each outdoor expansion valve 36 The opening is controlled at the loss target value (L), and in the case of the air conditioner 20 of the second embodiment, the upper limit of the opening is set based on the maximum height difference (ΔH).

[0124] In the above-mentioned first embodiment, the indoor command un...

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Abstract

When a refrigeration device (20) performs cooling operation, the device is provided with heat source-side opening degree control means (53) that controls the degree of opening of a heat source-side expansion valve (36) so that the pressure of refrigerant flowing into a utilization-side expansion valve (51) during cooling operation is lower than or equal to a predetermined standard pressure value.When the refrigeration (20) performs heating operation, the device is provided with utilization-side opening degree control means (38, 54) that, when multiple utilization units (61) includes, during heating operation, an utilization unit (61) using a small flow amount of refrigerant that is less than an amount required for the refrigerant to exhibit its ability, reduces the degree of opening of the utilization-side expansion valves (51) of the utilization units (61) other than the utilization unit (61) using the small flow amount of the refrigerant.

Description

technical field [0001] The invention relates to a refrigeration device comprising a heat source unit and a utilization unit. Background technique [0002] So far, refrigerating devices including heat source units and utilization units are known. The heat source unit and the utilization unit are connected together through connecting pipes. An example of such a refrigeration device is disclosed in Patent Document 1. [0003] Specifically, Patent Document 1 discloses an air conditioner including an outdoor unit, a first indoor unit, and a second indoor unit. In this air conditioner, the outdoor unit is installed on a roof of a building, the first indoor unit is installed below the outdoor unit, and the second indoor unit is installed below the first indoor unit. An outdoor circuit is built in the outdoor unit, and an indoor circuit is built in each indoor unit. Each indoor circuit is connected in parallel to the outdoor circuit via the liquid side connecting pipe and the ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00F25B6/02F25B13/00F25B49/02F25B39/00
CPCF25B13/00F25B49/027F25B2313/005F25B2313/0233F25B2313/02741F25B2500/01F25B2500/19F25B2600/19F25B2600/21F25B2600/2513F25B2700/04F25B41/39F25B41/35Y02B30/70F25B1/00F25B49/02F25B39/00
Inventor 河野聪松冈慎也
Owner DAIKIN IND LTD