CN102032700A

CN102032700A - Refrigeration equipment

Info

Publication number: CN102032700A
Application number: CN 201010612955
Authority: CN
Inventors: 魏鹏; 周向阳; 刘智勇; 伍光辉
Original assignee: Guangdong Midea Electric Appliances Co Ltd
Current assignee: Guangdong Midea Electric Appliances Co Ltd
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2011-04-27

Abstract

The invention discloses refrigeration equipment, which comprises a refrigeration system consisting of a compressor, a condenser, a throttle mechanism and an evaporator. In the refrigeration system, R161 serves as a refrigerant for refrigeration cycle, the R161 is filled according to the refrigeration capacity of the refrigeration system, and the filling quantity is 178.30 to 247.83g/KW; or the R161 is filled according to an internal volume of the condenser and the filling quantity is 419.90 to 659.82g/KW. In the refrigeration equipment, the R161 serves as the refrigerant for refrigeration cycle, and when the filling quantity of the R161 is 178.30 to 247.83g corresponding to the refrigeration capacity per KW, or when the filling quantity of the R161 is 419.90 to 659.82g corresponding to the internal volume of the condenser per liter, the refrigeration equipment has higher energy efficiency ratio. Moreover, the system pressure of the R161 is reduced by 10 to 12 percent compared with that of R22 and the exhaust temperature is reduced by 5 to 10 percent under the conditions; and under equivalent capacity, the filling quantity (weight) of the R161 is only 25 to 45 percent of that of the R22.

Description

Refrigeration plant

Technical field

The present invention relates to a kind of refrigeration plant, particularly a kind of use R161 (chemical formula CF3CH2F) substitutes the refrigeration plant of R22 refrigerant.

Background technology

As the refrigerant of refrigeration system, ozone layer destroying coefficient ODP (OzoneDepletion Potential) height of R22 (HFC22), thereby need to eliminate.At present as the alternative refrigerant of R22, widely used have R410A[HFC32 a: HFC125=50: 50 (weight ratios)] and R407C[HFC32: HFC125: HFC134a=23: 25: 52 (weight ratio)] etc.And, use the refrigeration system of R410A or R407C, can obtain the product of suitable efficiency coefficient COP with R22 (Coefficient ofPerformance).

Country will be in formal implement " room air conditioner efficiency limit value and efficiency grade " on June 1st, 2010.Therefore, consider, need to use the refrigerant of high energy efficiency ratio from energy-conservation aspect.In addition, investigate refrigerating plant and air conditioner, must select the less refrigerant of TEWI value for use the influence of global warming.Wherein, comprehensive equivalence warms and influences TEWI (Total Equivalent Warming Impact) as the global warming index, is to discharge the influence (directly influence) and energy consumption (remote-effects) sum of device that cause with refrigerant in atmosphere to represent.

With regard to above-mentioned GWP value in one's power, the GWP of R407C and R410A is respectively 1980 and 2340, and is bigger than the GWP value 1900 of R22.Therefore, global warming be prevented, the little R161 of GWP value (HFC161) can be selected for use.The GWP value of R161 is 12, and with R22, R407C, the GWP value 1900,1980,2340 of R410A is compared, and is approximately 1/150-1/200.

The theoretical Energy Efficiency Ratio of R161 is bigger than R22's, and in the reality test, under the different operating modes, the Energy Efficiency Ratio of R161 refrigerant all improves than R22, and the raising scope is between 8%-13%.It is 1822ppm that harmful concentration is not observed in toxicity aspect, maximum, does not observe harmful concentration 1000ppm greater than the maximum of R22.Need to prove that the flammable grade of R161 is A3, security is relatively poor.Therefore, R161 as an alternative refrigerant as yet not large-scale application in actual product.

Summary of the invention

Purpose of the present invention aims to provide the less R161 refrigerant of a kind of GWP of use value, thereby can provide that a kind of Energy Efficiency Ratio height, the anti-earth warm, energy-saving safety, refrigeration plant that volume is little, to overcome weak point of the prior art.

A kind of refrigeration plant by this purpose design, comprise the refrigeration system that constitutes by compressor, condenser, throttle mechanism and evaporimeter, use R161 to carry out kind of refrigeration cycle in the refrigeration system as refrigerant, it is characterized in that filling R161 according to the refrigerating capacity of refrigeration system, the loading of R161 is 178.30g/Kw-247.83g/Kw.

Above-mentioned refrigerating capacity is that (method of defined is measured according to country's " room air conditioner ".

A kind of refrigeration plant, comprise the refrigeration system that constitutes by compressor, condenser, throttle mechanism and evaporimeter, use R161 to carry out kind of refrigeration cycle as refrigerant in the refrigeration system, it is characterized in that filling R161 according to the internal volume of condenser, the loading of R161 is 419.90g/L-659.82g/L.

The efficiency ratio that the present invention considers refrigeration system with the trend that the difference of coolant injection amount in the refrigeration system changes is: to filling the refrigeration system of different refrigerants, all exist an optimum coolant quantity to make the efficiency ratio maximum of refrigeration system.With R161, the change of R22 and R410A coolant quantity, Energy Efficiency Ratio presents peak value, and when coolant quantity changes, Energy Efficiency Ratio will reduce.When using R161, its optimum Energy Efficiency Ratio when using R161 and being set in charging amount in the proper range, can access higher Energy Efficiency Ratio than the optimum Energy Efficiency Ratio height of R22 and R410A.Refrigeration plant of the present invention is using R161 to carry out kind of refrigeration cycle as refrigerant, and R161 is corresponding to every kW refrigerating capacity, its charging amount is when 178.30g-247.83g, perhaps, R161 when the 419.90g-659.82g, makes refrigeration plant have higher efficiency ratio corresponding to the charging amount of the internal volume of every liter of condenser.And in these cases, R161 reduces 10%-12% than R22 system pressure, and delivery temperature reduces 5%-10%; Under the equal capability, charging amount (weight) has only the 25%-45% of R22.In addition, owing to R161 has than existing R22 and the much lower GWP value (being about 1/150-1/200) of R410A, and, can also obtain than R410A and the high efficiency ratio of R22 filling under the suitable coolant quantity; In addition, under same capabilities, charging amount obviously will lack.Therefore, R161 compares with R410A with R22, and is more favourable to the environment environment.

Description of drawings

Fig. 1 is when refrigerating operaton, the charging amount of R161, R22 and 2410A and efficiency ratio graph of a relation.

Fig. 2 is when heating operation, the charging amount of R161, R22 and 2410A and efficiency ratio graph of a relation.

Fig. 3 is principle of the invention figure.

Fig. 4 is the compressor that uses identical efficiency, when equal capability, and the graph of a relation that the Energy Efficiency Ratio of R161 refrigerant efficiency ratio and R22 refrigerant compares.

Fig. 5 is the compressor that uses identical efficiency, when equal capability, and the graph of a relation that the Energy Efficiency Ratio of the efficiency ratio of R161 refrigerant practical measurement and R22 refrigerant practical measurement compares.

Fig. 6 is the graph of a relation of refrigerating capacity and outdoor heat exchanger internal volume.

Fig. 7 is the graph of a relation of refrigerating capacity and indoor heat exchanger internal volume.

Fig. 8 is refrigerating capacity and graph of a relation outdoor, indoor heat exchanger internal volume ratio.

Fig. 9 is R161 under the different refrigerating capacities, R410A, the capacity of the fluid reservoir of R22.

Figure 10 is R161 under the different refrigerating capacities, R410A, the capacity of the air accumulator of R22.

The specific embodiment

Below in conjunction with drawings and Examples the present invention is further described.

Referring to Fig. 3, this refrigeration plant is a heat pump air conditioner, comprises off-premises station 1 and indoor set 7, and both are connected by coolant piping and constitute the refrigerant loop, and in this refrigerant loop, R161 carries out kind of refrigeration cycle as refrigerant.Indoor heat exchanger 8 is arranged in the indoor set 7.And in the off-premises station 1, compressor 4, cross valve 3, outdoor heat exchanger 2, throttle mechanism 6 and fluid reservoir 5 are arranged.

When carrying out kind of refrigeration cycle, the refrigerant that compressor 4 is discharged is in cross valve 3 enters outdoor heat exchanger 2 as condenser; The refrigerant of condensation in outdoor heat exchanger enters in the indoor heat exchanger 8 as evaporimeter via throttle mechanism 6; Then, the refrigerant of gasification returns compressor 4 through cross valve 3 and fluid reservoir 5 in this indoor heat exchanger 8; Flow direction is seen among Fig. 3 shown in the solid arrow during refrigerant kind of refrigeration cycle.

When carrying out heating operation, cross valve 3 commutation, the refrigerant that compressor 4 is discharged enters in the indoor heat exchanger 8 as condenser via cross valve 25, pipe arrangement 3; The refrigerant of condensation enters in the outdoor heat exchanger 2 as evaporimeter via throttle mechanism 6 in indoor heat exchanger 8; Then, the refrigerant of evaporation returns compressor 4 via cross valve 3 and fluid reservoir 5 in outdoor heat exchanger 2; Flow direction is seen among Fig. 3 shown in the dotted arrow during refrigerant kind of refrigeration cycle.

As Fig. 6, shown in Figure 7, be the indoor heat exchanger of the air-conditioner of different ability ratings and the internal volume of outdoor heat exchanger from 2.6kW to 7.2kW.Shown in Figure 8, be the indoor heat exchanger of the air-conditioner of different ability ratings and the interior volume specific ratio of outdoor heat exchanger from 2.6kW to 7.2kW.

With reference to Fig. 6-Fig. 8 data, refrigerating capacity is the air conditioner of 3.5kW level, and the internal volume of outdoor heat exchanger 2 is set at 1.2 liters, and the internal volume of indoor heat exchanger 8 is set at 0.41 liter.Refrigerating capacity according to refrigeration system fills R161, and the loading of R161 is 178.30g/Kw-247.83g/Kw, and when refrigerating capacity is 3.5kW, the total loading of the R161 in the refrigerant loop will be 600g-850g; Internal volume according to condenser fills R161, and the loading of R161 is 419.90g/L-659.82g/L, and when the internal volume of outdoor heat exchanger 2 is 1.2 liters, the total loading of the R161 in the refrigerant loop will be 503.88g-791.78g.

According to aforesaid way to (in the refrigeration system R161 corresponding to the charging amount of every kW refrigerating capacity at 178.30g-247.83g, perhaps, R161 in the refrigeration system corresponding to its loading of internal volume of every liter of outdoor heat exchanger at 419.90g-659.82g) air-conditioner fills the R161 refrigerant, when the Energy Efficiency Ratio of air-conditioner is 780g at the R161 coolant quantity, reach the peak value of Energy Efficiency Ratio, specifically can be referring to measured data among Fig. 1 and Fig. 2.Simultaneously, as shown in Figure 1, use the 3.5kW air-conditioner of the same capabilities of R410A, high energy efficiency ratio is 3.26 (coolant quantity is 1380g).

In addition, can obtain from Fig. 1, Fig. 2, the high energy efficiency of R161 refrigerant system than the time the coolant injection amount, be 700g when when carrying out refrigerating operaton, being 780g, heating operation.The optimal refrigerant amount of R22 refrigerant system is 1020g when being 1270g, heating operation when carrying out refrigerating operaton.Thus the result as can be known, R161 and R22 systematicness ratio, the ratio of the optimal refrigerant amount when refrigeration and heating operation approaches 1.Therefore, can not need to adjust the capacity of fluid reservoir.

In addition, from the different abilities of 2.6kW to 7.2kW (equal efficient compressor) time, when using R161 and the Energy Efficiency Ratio of the refrigeration system of R22 refrigerant, obtain Fig. 4, result shown in Figure 5.Air-conditioner uses the charging amount of R161 refrigerant to be to use the 60%-76.5% of R22, and can reach best.Shown in Figure 4, when being benchmark (100%) with the Energy Efficiency Ratio of R22 system, the efficiency of R161 system is 103.8%.Shown in Figure 5, the efficiency 3.46 during with respect to use R22, the efficiency when using R161 is 3.59.Hence one can see that, when using R161 and being set in coolant quantity in the proper range, can access efficiency high when using R22.Why efficiency can be improved, and except self physical property of refrigerant, also has following factor: the pressure loss is little, the heat transmission raising of refrigerant etc.

Referring to Fig. 9 and Figure 10, be respectively R161, R410A is with the volume of R22 refrigerant system corresponding fluid reservoir (accumulator) and air accumulator (receiver) under different abilities.As can be seen from the figure, use the refrigeration plant of R161 refrigerant, the refrigeration plant of refrigerating capacity below 4kW can not need fluid reservoir and air accumulator, and the manufacturing cost of refrigeration plant can reduce, and can realize the miniaturization of refrigeration plant.

In addition, in the above-mentioned form of implementation, be that example is illustrated with the heat pump air conditioner, but be not limited thereto.The present invention can be widely used in using in the actual cold circulatory system of R161 as refrigerant.And principle of the present invention is not only applicable to single R161 refrigerant system, also is applicable to the mixing refrigerant system that contains 70% (weight) R161 at least.

Claims

1. refrigeration plant, comprise the refrigeration system that constitutes by compressor (4), condenser, throttle mechanism (6) and evaporimeter, use R161 to carry out kind of refrigeration cycle in the refrigeration system as refrigerant, it is characterized in that filling R161 according to the refrigerating capacity of refrigeration system, the loading of R161 is 178.30g/Kw-247.83g/Kw.

2. refrigeration plant, comprise the refrigeration system that constitutes by compressor (4), condenser, throttle mechanism (6) and evaporimeter, use R161 to carry out kind of refrigeration cycle in the refrigeration system as refrigerant, it is characterized in that filling R161 according to the internal volume of condenser, the loading of R161 is 419.90g/L-659.82g/L.