CN101260289A - Mixed refrigerant - Google Patents

Abstract

The invention discloses novel mixing refrigerant which is produced by taking 10 to 90 percent of chlorodifuoromethane and 10 to 90 percent of monochloro methane as raw materials and mixing the raw materials at normal temperature according to the weight percentage. Compared with the prior similar product R406a, the mixing refrigerant can also substitute R12 and R135a to be widely used in equipment such as automobile air conditioning, household refrigerators and so on, has the advantage of low production cost, and contributes to the popularization and application.

Description

A kind of mixed refrigerant

[affiliated technical field]

The present invention relates to a kind of mix refrigerant, especially relate to the mix refrigerant of a kind of alternative R12 and R134a.

[background technology]

Fluorine Lyons R12 is the very excellent refrigeration agent of a kind of thermal property, and its chemical property is stable, low toxicity, do not fire, and is widely used in for a long time in the equipment such as automative air conditioning, home freezer.But, being discharged into the atmosphere stratosphere since scientist finds Chlorofluorocarbons (CFCs) (CFCS), and under action of ultraviolet radiation, having understood since the depletion, its production and use have been subjected to the restriction of international convention.At present, many developed countries have stopped producing, and China is also reducing turnout according to plan year by year, and stop to produce the end of the year 2010.

Tetrafluoroethane (R134a) can be used on many fields of using R12, but owing to need the change of equipment design sometimes with this product, so the own cost height of product not only, simultaneously, whole refrigeration equipment cost also increases thereupon, wastes resource greatly, and Future Development trend also must be eliminated.

Mix refrigerant R406a (R22+R142B+R600A) is a kind of main products that is used for substituting R12 and R134a at present, also can be applicable in the equipment such as automative air conditioning, home freezer, and effect is very desirable.But there is the too high problem of cost in this refrigeration agent all the time in actual applications, thereby applies and be restricted.

[summary of the invention]

For overcoming the above-mentioned defective that prior art exists, the present invention aims to provide a kind of mixed refrigerant, and it not only can equally substitute R12 and R134a with R406a, is widely used in the equipment such as automative air conditioning, home freezer, and compare with R406a, have the low advantage of production cost.

For achieving the above object, the present invention has adopted following technical scheme: this mixed refrigerant is a raw material with the difluorochloromethane of 10-90%, the monochloro methane of 10-90%, mixes at normal temperatures according to weight percent.

Aforesaid mix refrigerant is characterized in that: according to weight percent, difluorochloromethane is 30%, and monochloro methane is 70%.

Aforesaid mix refrigerant is characterized in that: according to weight percent, difluorochloromethane is 40%, and monochloro methane is 60%.

Aforesaid mix refrigerant is characterized in that: according to weight percent, difluorochloromethane is 50%, and monochloro methane is 50%.

Aforesaid mix refrigerant is characterized in that: according to weight percent, difluorochloromethane is 35%, and monochloro methane is 65%.

Aforesaid mix refrigerant is characterized in that: according to weight percent, difluorochloromethane is 42%, and monochloro methane is 58%.

Beneficial effect: R406a is made up of difluorochloromethane, chlorodifluoroethane and three kinds of raw materials of Trimethylmethane, and at present, the market value of these three kinds of raw materials sees Table 1 respectively, and (unit is a Renminbi in the table: unit/ton)

(table 1)

The name of an article	In October, 2007	In November, 2007	In December, 2007
				Methyl chlorofluoride (R12)	18000	18000	18000
Tetrafluoroethane (R134a)	25000	24500	24500
				Difluorochloromethane	10500	11100	11500
Chlorodifluoroethane	14200	14500	14500
				Trimethylmethane	16800	16800	16800
Monochloro methane	5300	5300	5300

In the last table, the market value of monochloro methane is starkly lower than other raw material, if produce according to the inventive method proportioning, its production cost is obviously than R12, and R134a and R406a are low, help applying.

[embodiment]

The difluorochloromethane (R22) that the present invention uses, molecular formula: CHCLF2; Monochloro methane, molecular formula: CH3CL.During preparation, carry out physical mixed at normal temperatures according to weight percent and get final product:

Embodiment 1: get 30% difluorochloromethane and 70% monochloro methane is mixed and made into refrigeration agent.

Embodiment 2: get 40% difluorochloromethane and 60% monochloro methane is mixed and made into refrigeration agent.

Embodiment 3: get 50% difluorochloromethane and 50% monochloro methane is mixed and made into refrigeration agent.

Embodiment 4: get 35% difluorochloromethane and 65% monochloro methane is mixed and made into refrigeration agent.

Embodiment 5: get 42% difluorochloromethane and 58% monochloro methane is mixed and made into refrigeration agent.

Table 2

	R12	R134A	R406a	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5
									COP	1.0	1.0	0.96	1.01	1.0	0.99	1.0	0.98
Cost parameter	1.0	1.361	0.719	0.3977	0.4322	0.4666	0.415	0.4391
									Refrigerating duty	1.0	0.96	0.96	0.92	0.94	0.98	0.93	0.96
Force value MPa (10 ℃)	0.35	0.33	0.40	0.35	0.38	0.41	0.36	0.40

In the table 2:

1, cost parameter with the R12 market price 18000 yuan per ton be 1 radix.

2, the R406a cost parameter with (cost of material of the cost of material of the cost of material of 55%* difluorochloromethane+41%* chlorodifluoroethane+4%* Trimethylmethane) divided by 18000 yuan and draw per ton, (R406a by above-mentioned three kinds of raw materials, at normal temperatures mixes according to weight percent usually at 55%: 41%: 4%).

3, each embodiment cost parameter with the mixed cost of two kinds of raw materials divided by 18000 yuan and draw per ton.

4, cost of material is so that in December, 2007 in the table 1, market price was calculated.

Obviously, every index of this mixed refrigerant of the present invention all is better than R12 and R134a, and is better than the R406a performance.

Claims (6)

1, a kind of mixed refrigerant is characterized in that: this refrigeration agent is composed of the following components by weight percentage:

Difluorochloromethane 10-90%

Monochloro methane 10-90%.

2, mix refrigerant as claimed in claim 1 is characterized in that: wherein difluorochloromethane is 30%.

3, mix refrigerant as claimed in claim 1 is characterized in that: wherein difluorochloromethane is 35%.

4, mix refrigerant as claimed in claim 1 is characterized in that: wherein difluorochloromethane is 40%.

5, mix refrigerant as claimed in claim 1 is characterized in that: wherein difluorochloromethane is 42%.

6, mix refrigerant as claimed in claim 1 is characterized in that: wherein difluorochloromethane is 50%.