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

Refrigeration device

A refrigeration device and refrigerant technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve difficult problems such as refrigerant liquid level control, and achieve refrigerant liquid level control and stable refrigerant liquid level control Effect

Active Publication Date: 2010-08-18
DAIKIN IND LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case where the high-pressure side refrigerant is in a subcritical state, if the subcooling of the refrigerant flowing out of the radiator is insufficient, the refrigerant flowing out of the first expansion valve will be in a gas-liquid two-phase state, making it difficult to perform cooling. Refrigerant liquid level control of receiver

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 device
  • Refrigeration device
  • Refrigeration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045]

[0046] Fig. 1 shows a schematic refrigerant circuit 2 of an air conditioner 1 according to an embodiment of the present invention.

[0047] The air conditioner 1 is an air conditioner that uses carbon dioxide as a refrigerant and can perform cooling and heating operations, and mainly includes: a refrigerant circuit 2; air supply fans 26, 32; a control device 23; a high pressure sensor 21; sensor 24; and temperature sensor 22 and the like.

[0048] The refrigerant circuit 2 is mainly equipped with: compressor 11, four-way switching valve 12, outdoor heat exchanger 13, first electric expansion valve 15, liquid receiver 16, second electric expansion valve 17, and indoor heat exchanger 31. As shown in Figure 1, each device is connected through refrigerant piping.

[0049] In this embodiment, the air conditioner 1 is a split type air conditioner, which can also be said to include: an indoor unit 30 mainly including an indoor heat exchanger 31 and an indoor fan 32; mainl...

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 this invention is to enable the refrigerant level in a liquid receiver to be stably controlled even when the high-pressure-side refrigerant is in a subcritical state in a refrigeration device that comprises a refrigerant circuit in which a compressor, a radiator, a first expansion valve, a liquid receiver, a second expansion valve, and an evaporator are connected in sequence. The refrigeration device (1, 101) of this invention is provided with a compression mechanism (11), a radiator (13), a first expansion mechanism (15), a liquid receiver (16), a second expansion mechanism (17,33a, 33b), an evaporator (31, 31a, 31b) and a control unit (23). The control unit minimizes the degree of pressure reduction by the first expansion mechanism when the refrigerant that flows from the refrigerant discharge side of the compression mechanism to the refrigerant inflow side of the first expansion mechanism has reached a subcritical state.

Description

technical field [0001] The present invention relates to a refrigerating device, in particular to a refrigerating device in which a refrigerant becomes a supercritical state in a refrigerating cycle. Background technique [0002] Conventionally, there is known a refrigeration device having a refrigerant circuit in which a compressor, a radiator, a first expansion valve, a liquid receiver, a second expansion valve, and an evaporator are sequentially connected (for example, refer to Patent Document 1). [0003] Patent Document 1: Japanese Patent Laid-Open No. 10-115470 (page 4, column 5, line 12 to page 5, column 7, line 39, FIG. 3 ) [0004] When a supercritical refrigerant such as carbon dioxide is used as the refrigerant in the refrigerant circuit of this type of refrigeration device, the following situation sometimes occurs: at the beginning of operation, the refrigerant from the refrigerant discharge side of the compressor toward the first expansion valve The refrigerant ...

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): F25B1/00F25B43/00
CPCF25B2600/17F25B13/00F25B5/02F25B2341/063F25B2600/2513F25B2700/191F25B2309/061F25B2700/1931F25B2341/0662F25B2700/2102F25B2313/02741F25B9/008F25B41/39
Inventor 笠原伸一栗原利行
Owner DAIKIN IND LTD