Unlock instant, AI-driven research and patent intelligence for your innovation.

Refrigeration cycle device

A refrigeration cycle and refrigerant technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of wide range of refrigerant encapsulation and refrigerant shortage, etc., to reduce the diameter of pipes and suppress the reduction of efficiency Effect

Active Publication Date: 2016-02-03
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no description about the diameter of the connecting pipe of the refrigeration cycle device using refrigerant R32, or the description about the length of the connecting pipe, and the setting range of the amount of refrigerant enclosed is wide.
Therefore, in the case of the amount at the lower limit of the setting range of the enclosed refrigerant quantity described in Patent Document 2, no additional refrigerant is enclosed during construction of the refrigeration cycle device, and only the refrigerant enclosed at the time of shipment is used. In the case of the maximum connection piping length (chargeless maximum piping length), there is a problem that the refrigerant may be insufficient

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Refrigeration cycle device
  • Refrigeration cycle device
  • Refrigeration cycle device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] pass Figure 1 ~ Figure 3 Embodiment 1 of the refrigeration cycle apparatus of the present invention will be described. figure 1 It is a circulation system diagram for explaining Embodiment 1 of the refrigeration cycle apparatus of the present invention, figure 2 It is a diagram for explaining the connection pipe diameter and the refrigerant quantity ratio in a refrigeration cycle device (rated refrigeration capacity: 7.1kW, 12.5kW) using refrigerants R410A and R32 having equal COPs, image 3 It is a diagram for explaining connection pipe diameters and refrigerant quantity ratios in a refrigeration cycle apparatus (rated refrigeration capacities of 3.6 kW and 5.6 kW) using refrigerants R410A and R32 having equal COPs.

[0038] figure 1 An air conditioner as a refrigeration cycle device is shown, and an outdoor unit 40 and an indoor unit 20 are connected by a liquid-side connecting pipe 7 and a gas-side connecting pipe 8 . In the outdoor unit 40, reference numeral 1 ...

Embodiment 2

[0064] pass Figure 4 , Figure 5 Embodiment 2 of the refrigeration cycle apparatus of the present invention will be described. Figure 4 It is a graph showing the refrigerant quantity ratio (refrigerant quantity ratio equal to COP) with respect to the R410A standard of the rated refrigeration capacity in a refrigeration cycle device using refrigerant R32, Figure 5 It is a diagram for explaining the COP ratio based on R410A when the amount of refrigerant is equalized in a refrigeration cycle apparatus using refrigerants R410A and R32, and also shows the diameter of connecting pipes.

[0065] In the first embodiment above, the outer diameter of the connecting pipes 7 and 8 of the refrigeration cycle device using the refrigerant R32 is one order smaller than that of the connecting pipes 7 and 8 of the refrigeration cycle device using the refrigerant R410A. ,pass Figure 4 The amount of refrigerant (upper limit and lower limit) enclosed in the refrigeration cycle apparatus us...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An object of the present invention is to use a refrigerant with a low global warming coefficient (GWP) while suppressing a decrease in efficiency and reducing the pipe diameter of the connecting pipe. The refrigeration cycle device is sequentially connected to the compressor (1), the heat source machine-side heat exchanger (3), the first expansion device (4), the liquid-side connecting pipe (7), the second expansion device (21), and the utilization-side heat exchanger (22), the gas side is connected to the piping (8) and constituted. In addition, assuming that the refrigerant used in the refrigeration cycle is R32, the pipe outer diameters of the liquid-side connection pipe and the gas-side connection pipe are "(D0-1) / 8 inches" (where, "D0 / 8 inch" is the outer diameter of the connection pipe when using refrigerant R410A), and the range of D0 in the liquid side connection pipe is set to "2≤D0≤4", in the gas In the side connection piping, the range of D0 is set to "3≤D0≤8".

Description

technical field [0001] The present invention relates to a refrigeration cycle device such as an air conditioner and a refrigerator utilizing a refrigeration cycle, and particularly to a refrigeration cycle device using R32 (difluoromethane) as a refrigerant used in the refrigeration cycle. Background technique [0002] Currently, in refrigerating and air-conditioning equipment such as air conditioners and refrigerators, more and more devices use refrigerant R410A as the refrigerant sealed in the refrigeration cycle. Refrigerant R410A can improve the efficiency of refrigerating and air-conditioning equipment, and reduce the amount of carbon dioxide produced during power generation by reducing power consumption thereby. In addition, suppression of refrigerant discharge by means of countermeasures against refrigerant leakage and the like is also achieved, thereby contributing to the prevention of global warming. [0003] However, since refrigerant R410A is a refrigerant with a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/00F25B1/00
CPCF25B13/00F25B2500/01F25B2400/12F25B41/40F25B41/00
Inventor 坪江宏明横关敦彦塚田福治中山进
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC