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Cooling medium radiator

A technology for refrigerants and radiators, applied in the field of refrigerant radiators, which can solve problems such as the inhomogeneity of the air temperature distribution of radiators that cannot be sufficiently suppressed

Active Publication Date: 2015-07-22
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] When viewed from the flow direction of the blown air, when the heat exchange portion for the refrigerant in the gas-liquid two-phase state is superimposed on the other heat exchange portion for the refrigerant in the gas-phase state or liquid-phase state in the flow direction of the air heat part, in some cases, will not be able to sufficiently suppress the non-uniformity of the temperature distribution of the air from the radiator

Method used

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  • Cooling medium radiator
  • Cooling medium radiator
  • Cooling medium radiator

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0107] The first embodiment of the invention will refer to Figure 1-4 be described. In the present embodiment, the heat pump cycle 10 (vapor compression refrigeration cycle) having the refrigerant radiator 12 of the present invention is applied to the vehicle air conditioner 1 . figure 1 It is a schematic diagram of the overall structure of the vehicle air conditioner 1 in this embodiment. The vehicle air conditioner 1 is applicable not only to a general engine vehicle that obtains traveling driving force from an engine (internal combustion engine), but also to other various types of vehicles such as hybrid vehicles or electric vehicles.

[0108] The heat pump cycle 10 in the vehicle air conditioner 1 is used to heat or cool blown air in the vehicle compartment, which is to be blown into the vehicle interior as an air-conditioning space. That is, the heat pump cycle 10 can switch between refrigerant paths, thereby performing a heating operation (heater operation) and a coo...

no. 2 example

[0185] In this example, if Figure 5 As shown in (a) and 5(b), some changes are made to the positions of the inlet-side connector 122a and the outlet-side connector 123a of the first embodiment by way of example. Figure 5 (a) and 5(b) correspond to image 3 (a) and 3(b), and with image 3 The same or equivalent components in (a) and 3(b) are denoted by the same reference numerals. Subsequent drawings also have the same setting.

[0186] In the refrigerant radiator 12 of this embodiment, the inlet side connector 122a is provided on the upper side, and the outlet side connector 123a is provided on the lower side, so that the refrigerant flows through the pipe 121 from the upper side to the lower side.

[0187] The refrigerant radiator that allows the refrigerant to flow through the pipe 121 from the upper side to the lower side does not need to consider the pressure loss caused by the gravity acting on the condensed refrigerant, and can suppress undesired flow caused by the ...

no. 3 example

[0193] In this example, if Figure 6 As shown in (a) and 6(b), some changes are made to the structure of the refrigerant radiator 12 of the first embodiment. In the refrigerant radiator 12 of the present embodiment, a separator 123c is provided in the upper header 123 to divide the inner space of the header 123 into two parts, ie, a distribution space 123d and a collection space 123e, in the longitudinal direction. Figure 6 (a) and 6(b) respectively correspond to the first embodiment image 3 (a) and 3(b), and Figure 5 (a) and 5(b).

[0194] The pipes 121 of the present embodiment are classified into a first pipe group 121 a connected to the collection space 123 e of the upper header 123 and a second pipe group 121 b connected to the distribution space 123 d of the upper header 123 . The upper header 123 is also connected to an inlet side connector 123f to allow refrigerant discharged from the compressor 11 to flow into the distribution space 123d, and to an outlet side c...

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Abstract

A refrigerant radiator (12) for a heat pump cycle includes a plurality of tubes (121). The tubes (121) are disposed to satisfy the hollowing relationship: Re ‰¥ A × X 6 + B × X 5 + C × X 4 + D × X 3 + E × X 2 + F × X + G wherein ¸ is an inclination angle (°) formed by a flow direction of the refrigerant flowing through the tubes (121) and the horizontal direction; X is a dryness of the refrigerant in a predetermined position where the refrigerant flowing through the tubes (121) is a gas-liquid two-phase refrigerant; and Re is a Reynolds number of the refrigerant in the predetermined position determined from an average flow velocity (m / S) of the refrigerant flowing through the tube (121). The A to G are expressed by a function of 0, which suppresses the non-uniform loss in pressure of the refrigerant in the respective tubes (121) to reduce the difference in temperature of blown air in the refrigerant radiator

Description

[0001] Cross-references to related applications [0002] This application is based on Japanese Patent Applications No. 2010-292599 filed on December 28, 2010 and Japanese Patent Application No. 2011-280337 filed on December 21, 2011, the disclosures of which are incorporated herein by reference. technical field [0003] The invention relates to a refrigerant radiator for dissipating heat from refrigerant in a vapor compression refrigeration cycle. Background technique [0004] Generally, a refrigerant radiator in a vapor compression refrigeration cycle is known, which dissipates heat from a high-temperature and high-pressure refrigerant discharged from a compressor by exchanging heat with air. For example, the refrigerant radiator disclosed in Patent Document 1 is applied to a vehicle air conditioner. The refrigerant radiator functions as a heater to heat the air blown into the vehicle compartment by exchanging heat between the refrigerant discharged from the compressor and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D1/053B60H1/32F25B39/04F28F1/00F28F1/02F28F1/30
CPCB60H1/3227F28D2001/0266F25B6/04F28F1/00F28D1/05391F25B2400/0409F25B39/04F28D1/05366F25B2400/0411F25B5/04B60H1/00321B60H1/32F28D1/053F28F1/02
Inventor 加藤吉毅
Owner DENSO CORP