CN101097100A - Cold-producing medium loop - Google Patents

Abstract

The invention discloses a cooling agent circuit, which is characterized by the following: comprising compressor of compression refrigerating agent, gas cooler, evaporator to evaporate cooling agent, ejector and inner heat exchanger; depressing high pressure cooling agent from gas cooler; absorbing in the low pressure cooling agent from the evaporator; mixing; increasing the pressure for mixed cooling agent; discharging with the ejector; separating the mixed cooling agent to gas phase cooling agent and liquid phase cooling agent; turning the gas phase back to the compressor; providing the liquid phase cooling agent to the gas-liquid separator of the evaporator; paralleling the multiple evaporator; connecting multiple strips of cooling agent cycling passage through switch valve; proceeding heat exchange for the high pressure cooling agent and the low pressure cooling agent with the inner heat exchanger. This invention can prevent increasing of high pressure side, which can make the cycling state to reach optimum.

Description

Refrigerant loop

Technical field

The present invention relates to refrigerant loop, particularly use the refrigerant loop of injector.

Background technology

In the prior art, announcement has freeze cycle as refrigerant loop.Freeze cycle ring-type is successively connecting compressor, condenser, two phase flow type injector and gas-liquid separator, is detained between the part at the suction inlet of injector and the refrigerant liquid of gas-liquid separator, is provided with evaporimeter via throttling arrangement.For this freeze cycle, injector makes the low pressure refrigerant circulation by the sucking action that the injection from the high-pressure refrigerant of condenser can (drive stream) and produces, when reducing evaporating temperature raising heat exchange efficiency, reduce the acting amount (for example referring to patent documentation 1) of compressor.

[patent documentation 1] Japanese kokai publication sho 57-129360

Above-mentioned injector is made of spray nozzle part, mixing portion and diffusion part, wherein, said nozzle portion sucks the low pressure refrigerant through evaporimeter when the high-pressure refrigerant through condenser is reduced pressure, above-mentioned mixing portion is mixed with high-pressure refrigerant the low pressure refrigerant that sucks, and above-mentioned diffusion part boosts the cold-producing medium of mixing and discharges.But, in above-mentioned freeze cycle, when the low pressure refrigerant amount of suction side being changed, will change at the flow velocity of mixing portion or diffusion part when load change in evaporimeter.Its result changes the problem that causes recurrent state to change with regard to the pressure that produces mixing portion or diffusion part.For example, when the density of cold-producing medium increases, the efficient of cold-producing medium will reduce.Particularly such as automatic vending machine etc., between injector and gas-liquid separator and show a plurality of evaporimeters, under the situation of the cold-producing medium circulation approach that each evaporimeter optionally moves, because the different loads that make of the quantity of the evaporimeter of action produce change significantly, cause the low pressure refrigerant quantitative changeization of suction side, the problems referred to above are just more remarkable.

In addition, in general automatic vending machine, a plurality of (for example three) commodity are accommodated the storehouse and are disposed evaporimeter respectively, and each evaporimeter moves respectively.And it is special-purpose as cooling that the commodity of a side are accommodated the storehouse, and the commodity of middle and opposite side are accommodated the storehouse and disposed heater etc. and be used for cooling off and heating.And it is little that the volume that middle commodity are accommodated the storehouse is accommodated the volume in storehouse than the commodity of both sides usually.Therefore, when the commodity of centre are accommodated the storehouse cooling, and the commodity of opposite side are accommodated under the situation of storehouse cooling or heating, and the influence of being invaded heat makes that accommodating the Load Evaporator change of disposing in the storehouse at intermediate commodity increases significantly.Therefore, usually, the internal circulating load of cold-producing medium is corresponding with the peak load of accommodating the evaporimeter that disposes in the storehouse at the commodity of centre (accommodating at the commodity of opposite side under the situation of storehouse heating).But, accommodate that the storehouse is all cooled off or a side and middle commodity are accommodated under the situation of storehouse cooling at entire service, occur sometimes accommodating that the storehouse reaches proper temperature and the action that stops evaporimeter in order to make except that the commodity middle, perhaps just the less intermediate commodity of volumetric ratio is accommodated the state that the evaporimeter in storehouse moves.Under such state,, reduce the problem of operational efficiency (freeze cycle efficient) variation and produce evaporating temperature owing to the circulating mass of refrigerant of accommodating the evaporimeter in the storehouse at the commodity of centre becomes big.

In addition, in gas-liquid separator, the mix refrigerant that obtains from injector is separated into vapor phase refrigerant and liquid phase refrigerant, makes vapor phase refrigerant turn back to compressor, and liquid phase refrigerant is supplied in the evaporimeter.For the gas-liquid separator of prior art,, and make the space efficiency variation because form the jar shape of volume with temporary transient storage mix refrigerant.Particularly as above-mentioned automatic vending machine etc., accommodate at a plurality of commodity and to dispose evaporimeter in the storehouse respectively, under the situation that each evaporimeter moves respectively, in order to prevent that the difference of evaporimeter quantity because of action from change circulating mass of refrigerant and liquid compression occurring in compressor, be necessary to make and jar maximize.

Summary of the invention

In view of the above problems, the object of the present invention is to provide a kind of refrigerant loop, can prevent to change the variation of the recurrent state that causes, thereby can realize the gas-liquid separator miniaturization owing to Load Evaporator.

To achieve these goals, the refrigerant loop of first aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, has the internal exchanger that makes the high-pressure refrigerant that supplies in the described injector and low pressure refrigerant carry out heat exchange mutually.

The refrigerant loop of second aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and many refrigerant circulation passage that connect by switch valve, wherein, have the internal exchanger that makes the high-pressure refrigerant that supplies to described injector and low pressure refrigerant carry out heat exchange mutually.

The refrigerant loop of third aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, the evaporimeter of regulation is connected with other evaporator series by many refrigerant circulation passage that switch valve connects.

The refrigerant loop of fourth aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, described gas-liquid separator is made of interior pipe and outer tube, wherein, the starting end of pipe is connected with described injector in described, be provided with through hole forming spiral helicine radially outer position, terminal is connected with described compressor, and described outer tube by the distolateral covering of beginning described in the position that is provided with through hole of pipe, and form helical form with pipe in this, the terminal of pipe branch is connected with described evaporimeter in described.

The refrigerant loop of fifth aspect present invention, it is characterized in that, in above-mentioned fourth aspect, described gas-liquid separator is provided with trap portion, end side at described outer tube, above also being sent to when making cold-producing medium temporarily below being sent to, the bottom of this trap portion is connected with tube terminal side in described below this bottom.

The refrigerant loop of sixth aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, have: the nozzle group valve of partly regulating refrigerant flow in the decompression of described injector by many refrigerant circulation passage that switch valve connects; Adjusting is to the expansion valve of the refrigerant flow of described evaporimeter supply; The evaporator inlet temperature sensor that detects refrigerant temperature that is provided with respectively with porch at described each evaporimeter, wherein, regulate the aperture of described nozzle group valve and described expansion valve, the feasible refrigerant temperature that is detected by described evaporator inlet temperature sensor within the limits prescribed.

The refrigerant loop of seventh aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, have: the nozzle group valve of partly regulating refrigerant flow in the decompression of described injector by many refrigerant circulation passage that switch valve connects; Adjusting is to the expansion valve of the refrigerant flow of described evaporimeter supply; The evaporator inlet temperature sensor that detects refrigerant temperature that is provided with respectively in the porch of described each evaporimeter; The evaporator outlet temperature sensor that detects refrigerant temperature that is provided with respectively with exit at described each evaporimeter, wherein, regulate the aperture of described nozzle group valve and described expansion valve, make the refrigerant temperature that detects by described evaporator inlet temperature sensor and the temperature difference of the refrigerant temperature that detects by described evaporator outlet temperature sensor within the limits prescribed.

The refrigerant loop of eighth aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, have: the expansion valve of regulating the refrigerant flow of supplying with to described evaporimeter by many refrigerant circulation passage that switch valve connects; Detect the high-pressure sensor of high-pressure refrigerant pressure; Detect the low-pressure sensor of low pressure refrigerant pressure; The exit that is separately positioned on described each evaporimeter detects the evaporator outlet temperature sensor of refrigerant temperature; With the storehouse temperature sensor that detects the heat insulation loop border temperature inside that disposes described evaporimeter, wherein, the refrigerant pressure that will detect by described high-pressure sensor and low-pressure sensor, the refrigerant temperature that detects by described evaporator inlet temperature sensor, and the refrigerant density calculated of the temperature that detects by described storehouse temperature sensor, compare by the predefined refrigerant density setting value of refrigerant pressure that high-pressure sensor and low-pressure sensor detect with basis, regulate the aperture of described expansion valve, make described reckoning refrigerant density within the limits prescribed.

The refrigerant loop of ninth aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, have: to the evaporator fan of described evaporimeter air-supply by many refrigerant circulation passage that switch valve connects; Detect the high-pressure sensor of high-pressure refrigerant pressure; Detect the low-pressure sensor of low pressure refrigerant pressure; Be separately positioned on described each evaporator outlet place and detect the evaporator outlet temperature sensor of refrigerant temperature; With the storehouse temperature sensor that detects the heat insulation loop border temperature inside that disposes described evaporimeter, wherein, the refrigerant pressure that will detect by described high-pressure sensor and low-pressure sensor, the refrigerant temperature that detects by described evaporator inlet temperature sensor, and the refrigerant density calculated of the temperature that detects by described storehouse temperature sensor, compare by the predefined refrigerant density setting value of refrigerant pressure that high-pressure sensor and low-pressure sensor detect with basis, regulate the aperture of described expansion valve, make described reckoning refrigerant density within the limits prescribed.

The refrigerant loop of tenth aspect present invention is characterized in that, comprising: the compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, between described injector and described gas-liquid separator, be provided with another injector, by making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the mix refrigerant of discharging and mixing from described injector, to the discharge of boosting of the cold-producing medium of this mixing, and be supplied to described gas-liquid separator.

The present invention the tenth refrigerant loop on the one hand is characterized in that, aspect above-mentioned first～the tenth in any one above-mentioned cold-producing medium be carbon dioxide.

Refrigerant loop of the present invention comprises internal exchanger, makes the high-pressure refrigerant and the low pressure refrigerant that are supplied to injector carry out heat exchange mutually.Promptly, even make at evaporimeter generation load change under the situation that the low pressure refrigerant amount of suction side changes, because internal exchanger makes the latent heat of remaining low pressure refrigerant emit from radiator and is used for cooling off high-pressure refrigerant, thereby prevent that high-pressure refrigerant pressure from rising.Its result owing to evaporate, makes that the refrigerant density that sucks is certain in injector on the basis of the low pressure refrigerant degree of superheat, therefore can realize the optimization of recurrent state.

Particularly, constituting makes a plurality of described evaporimeters arranged side by side, and in the refrigerant loop of many refrigerant circulation passage that connect by switch valve, though because of reducing the evaporimeter quantity of moving by the switching of switch valve, make evaporimeter that significantly load change take place, but make high-pressure refrigerant and low pressure refrigerant carry out heat exchange by internal exchanger, so that the refrigerant density that is sucked by injector keeps certain, can make recurrent state realize optimization.

Refrigerant loop of the present invention makes the evaporimeter of regulation be connected with other evaporator series by switch valve.That is, when the evaporimeter action of having only regulation,, make be not the evaporimeter individual operation of regulation in other evaporimeter because remaining cold-producing medium evaporates in this evaporimeter.As a result, remaining cold-producing medium is not discarded and can be made full use of, thereby improves the efficient of operation.

Refrigerant loop of the present invention, in gas-liquid separator, by be connected between injector and the compressor form helical form and in radially outer position is provided with the interior pipe of through hole and is covered with the position that is provided with through hole of pipe, and form the outer tube that end side spiral helicine, that branch out from interior pipe connecting evaporimeter with interior pipe and constitute.Promptly, to lead to interior pipe from the mix refrigerant that injector is supplied with, by the mix refrigerant at helical form position, liquid phase refrigerant wherein is partial to radial outside by action of centrifugal force, be moved in the outer tube through through hole, thereby vapor phase refrigerant is separated with liquid phase refrigerant.Thus, can realize miniaturization, improve space efficiency by making spiral helicine double pipe structure.Particularly make a plurality of described evaporimeters arranged side by side in formation, and in the refrigerant loop of many refrigerant circulation passage that connect by switch valve, though the switching of reason switch valve and the quantity of the evaporimeter that moves can make circulating mass of refrigerant change is owing to corresponding with the helix length of interior pipe and outer tube and can not cause maximization.

In addition, be provided with trap portion in gas-liquid separator, above also can being sent to when making the cold-producing medium of tube terminal side outside below being sent to, the bottom of this trap portion is connected with interior tube terminal below this bottom.That is, in trap portion, by refrigerator oil contained in liquid phase refrigerant since self proportion be deposited to the bottom be transplanted in the end side of pipe, and liquid phase refrigerant is separated with refrigerator oil.Thus,, make to have the knockout drum that the cold-producing medium that is stored can be separated with refrigerator oil, compare with the oil eliminator of prior art and can realize miniaturization, can improve space efficiency by the structure of trap portion is set.Particularly the structure of separating refrigerator oil in the interior pipe of gas-liquid separator and outer tube is made an integral body, can carry out the separation of gas, liquid, oil with better efficient.

In refrigerant loop of the present invention, regulate the aperture of nozzle group valve and expansion valve, make the refrigerant temperature that detects by the evaporator inlet temperature sensor within the limits prescribed.That is, make a plurality of described evaporimeters arranged side by side, and in the refrigerant loop of many refrigerant circulation passage that connect by switch valve, select the evaporimeter of action by the switching of switch valve in formation.Therefore, the situation of existing evaporimeter action also has the situation that a plurality of evaporimeters move.So, when changing the operating state of evaporimeter, will make evaporating temperature and high-pressure that very big variation is arranged.Therefore, if regulate the aperture of nozzle group valve and expansion valve, the feasible refrigerant temperature that is detected by the evaporator inlet temperature sensor within the limits prescribed, then can suppress the variation of evaporating temperature and high-pressure by the variation of evaporimeter operating state, can make the operational efficiency of heat exchange amount in the evaporimeter or compressor realize optimization.

In refrigerant loop of the present invention, regulate the aperture of nozzle group valve and expansion valve, make the refrigerant temperature that detects by the evaporator inlet temperature sensor and the difference of the refrigerant temperature that detects by the evaporator outlet temperature sensor within the limits prescribed.That is, make a plurality of described evaporimeters arranged side by side, and in the refrigerant loop of many refrigerant circulation passage that connect by switch valve, select the evaporimeter of action by the switching of switch valve in formation.Therefore, be an evaporimeter action sometimes, be a plurality of evaporimeter actions sometimes.So, when the operating state of evaporimeter changed, evaporating temperature and high-pressure just had very big variation.Thereby, if regulate the aperture of nozzle group valve and expansion valve, the difference of the refrigerant temperature that makes the refrigerant temperature that detected by the evaporator inlet temperature sensor and detected by the evaporator outlet temperature sensor within the limits prescribed, then can suppress the variation of evaporating temperature and high-pressure by the variation of evaporimeter operating state, can make the heat exchange amount of evaporimeter or the operational efficiency of compressor realize optimization.

In refrigerant loop of the present invention, the aperture of variable expansion valve and the air quantity of evaporator fan, and refrigerant temperature that will detect and the refrigerant density of calculating by the temperature that above-mentioned storehouse temperature sensor detects from the refrigerant pressure that detects by high-pressure sensor and low-pressure sensor, by the evaporator inlet temperature sensor, compare with the predefined refrigerant density setting value of the refrigerant pressure that detects according to high-pressure sensor and low-pressure sensor, the refrigerant density that makes reckoning is in prescribed limit.That is, make a plurality of described evaporimeters arranged side by side, and in the refrigerant loop of many refrigerant circulation passage that connect by switch valve, select the evaporimeter of action by the switching of switch valve in formation.Therefore, an evaporimeter action is arranged sometimes, a plurality of evaporimeter actions are arranged sometimes.So, when the operating state of evaporimeter changed, evaporating temperature and high-pressure just had very big variation.Thereby, if the air quantity of the aperture of variable expansion valve and evaporator fan, the refrigerant density that makes reckoning is in prescribed limit, then can suppress the evaporating temperature that the variation owing to the evaporimeter operating state causes and the variation of high-pressure, can make the heat exchange amount of evaporimeter or the operational efficiency of compressor realize optimization.

Refrigerant loop of the present invention by another injector is set, makes owing to the multi-stage jet device has increased refrigerant pressure, has alleviated the burden of compressor, can further realize the high efficiency that circulates.

Refrigerant loop of the present invention is effective when using carbon dioxide as cold-producing medium particularly.

Description of drawings

Fig. 1 is the stereogram of the open state of the expression automatic vending machine inside of be fit to using refrigerant loop of the present invention.

Fig. 2 is the front view at the automatic vending machine shown in Fig. 1.

Fig. 3 is the skeleton diagram of expression refrigerant loop embodiment of the present invention.

Fig. 4 is the skeleton diagram of two sections compressors of expression.

Fig. 5 is the structure chart of expression gas-liquid separator.

Fig. 6 is the sectional view of expression gas-liquid separator effect.

Fig. 7 is the sectional view of expression gas-liquid separator effect.

Fig. 8 is the plane of expression internal exchanger.

Fig. 9 is the front view of expression internal exchanger.

Figure 10 is the side view of expression internal exchanger.

Figure 11 is the stereogram of expression internal exchanger.

Figure 12 is the sectional view of internal exchanger.

Figure 13 is the figure that expression makes high-pressure refrigerant and low pressure refrigerant carry out heat exchange by internal exchanger.

Figure 14 is the sectional view of side that be fit to use the automatic vending machine of refrigerant loop of the present invention.

Figure 15 is the skeleton diagram that is fit to the automatic vending machine of use refrigerant loop of the present invention.

Figure 16 is the block diagram of expression refrigerant loop control system.

Figure 17 is the flow chart of the control action of expression refrigerant loop control part.

Figure 18 is the certain chart of expression control evaporating temperature.

Figure 19 is the certain chart of the expression control degree of superheat.

Figure 20 is the flow chart of another control action of expression refrigerant loop control part.

Figure 21-the 1st is illustrated in the chart that the refrigerant density under the high-pressure sets value.

Figure 21-the 2nd is illustrated in the chart that the refrigerant density under the low pressure sets value.

Figure 22 is the chart of expression control electric expansion valve.

Figure 23 is the chart of expression control evaporator fan.

Figure 24 is the figure of the duty factor (duty) of expression control evaporator fan.

Figure 25 is to use the skeleton diagram of evaporimeter as the refrigerant loop under the heater situation.

Figure 26 is the skeleton diagram of another embodiment of expression refrigerant loop of the present invention.

Label declaration

51 (51a, 51b) compressor

511 Intermediate Heat Exchangers

52 gas coolers (radiator)

53,53 ' injector

531 spray nozzle parts

The 531a nozzle group valve

532 mixing portions

533 diffusion parts

54 gas-liquid separators

541 gas-liquid separation portions

Pipe in the 541A

The 541Aa starting end

The 541Ab terminal

The 541Ac through hole

The 541B outer tube

The 541Ba starting end

The 541Bb terminal

541Bc trap portion (trap)

542 liquid oil separation part

The 542A tube connector

55 (55a, 55b, 55c) evaporimeter

551a, 551b, 551c magnetic valve

56 internal exchangers

561 high-pressure refrigerant pipelines

The 561a inlet portion

561b export department

562 low pressure refrigerant pipelines

The 562a inlet portion

562b export department

563 heat-barrier materials

57 electric expansion valves (expansion valve)

58 capillaries

59 heaters

60 bypasses (bypass) pipe

61 magnetic valves

62 magnetic valves

63a, 63b, 63c evaporator fan

64 gas cooler fan

71 high-pressure sensors

Pressure pressure sensor in 72

73 low-pressure sensors

74 gas cooler exit temperature sensors

75 environment temperature sensors

76a, 76b, 76c evaporator inlet temperature sensor

77a, 77b, 77c evaporator outlet temperature sensor

78a, 78b, 78c storehouse temperature sensor

79 internal exchanger outlet temperature sensors

100 refrigerant loop control parts

101 memories

The specific embodiment

Below, the preferred implementation of the refrigerant loop that present invention will be described in detail with reference to the accompanying.Wherein, the present invention is not limited by these embodiments.

At first explanation is fit to use the automatic vending machine of refrigerant loop of the present invention.Fig. 1 is the stereogram that the automatic vending machine of the suitable use of expression refrigerant loop of the present invention is opened internal state.Fig. 2 is the front view of the automatic vending machine shown in Fig. 1.

Automatic vending machine in this demonstration is used for selling commodity such as tinned drink or PET bottled drink, comprises main body case 1, inside door 2 and main door 3 as shown in Figure 1.

For main body case 1, it is made of securely polylith steel plate appropriate combination, and the front becomes the rectangle of opening.In the inside of this main body case, be arranged side by side three places and have by one's own efforts the commodity of heat insulation structural and accommodate storehouse 4a, 4b and 4c.In addition, the position below the formation commodity are accommodated storehouse 4a, 4b and 4c is provided with unique Machine Room 5.

Commodity accommodate storehouse 4a, 4b and 4c is used to accommodate beverage can or PET bottle and maintains the temperature desired state, and portion is equipped with stand (rack) 6a, 6b and the 6c of column respectively above it.In the present embodiment, in Fig. 1, accommodate storehouse 4a at the commodity that are arranged in frontal left, be provided with two row stand 6a, accommodate storehouse 4b at the commodity that are arranged in positive centre, be provided with a row stand 6b, also be provided with two row stand 6c and accommodate storehouse 4c at the commodity that are arranged in positive right side.In addition, accommodate storehouse 4a, 4b and 4c, divide the bottom of stand 6a, 6b and 6c by slideway 7 for commodity.Refrigerant loop of the present invention is configured to stride across the part and the Machine Room 5 that are separated out by slideway 7 that above-mentioned commodity are accommodated storehouse 4a, 4b and 4c.As following in detail as described in.

The inside door 2 of automatic vending machine and main door 3 support respectively and are arranged on the lateral edges of main body case 1.

Inside door 2 as shown in Figure 1, it has enough sizes and covers the front that the commodity that are arranged in the main body case 1 are accommodated storehouse 4a, 4b and 4c, is made by steel.In illustrated embodiment, inside door 2 is divided into two parts up and down, can distinguish switch.

Main door 3 has enough sizes, can cover the front openings of main body case 1, utilizes steel to constitute securely.As shown in Figure 2, on main door 3, be provided with in its surperficial side show that window 8, selector button 9, coin slot 10, bank note insert mouthfuls 11, integral display 12, coin return mouthfuls 13 and commodity take-out port 14.On the other hand, main 3 the inside one side as shown in Figure 1 is provided with Coin processing device 15, coin collection box 16, paper money processing machine 17, displaying door 18 and Main Control Tank 19.Show that window 8 is to be configured in commodity sample 8a on the displaying door 18 and the window of electric lighting plate 8b for user's identification.Selector button 9 is the press button that uses for the user selects the commodity of buying, and each is all with corresponding by the commodity sample of showing window 8 affirmations.Coin slot 10 is the openings that insert coin for the user.By the coin that this coin slot 10 drops into, in Coin processing device 15, identify the kind of currency, be loaded into then in the coin collection box 16.It is the openings that insert bank note for the user that bank note inserts mouth 11.Insert mouthful 11 bank note that insert by this bank note, its kind of currencies of identification in paper money processing machine 17.In addition, above-mentioned bank note inserts mouthfuls 11, also has the function of the bank note that return can't discern in paper money processing machine 17.Integral display 12 be used for to the user show the amount of money that currency drops into, whether in print, whether want the display unit of various information such as small change.It is openings of the coin of 15 coins that can not discern of Coin processing device or small change being returned to the user that coin is returned mouth 13.Commodity take-out port 14 is the openings that are used for dividing from stand 6a, 6b, 6c for user's acceptance the commodity that send.Main Control Tank 19 is to contain the chest that automatic vending machine is carried out the control substrate (not shown) of various controls.

Use above-mentioned automatic vending machine, the user inserts coin from coin slot 10, perhaps inserts mouthful 11 insertion bank note from bank note, when the amount of money of this currency of identification is bought the necessary amount of money of commodity exactly, makes selector button 9 effective.When the user pushes selector button 9, will deliver to commodity from the bottom of stand 6a (perhaps 6b, 6c) with selector button 9 corresponding commodity and accommodate the storehouse 4a (perhaps 4b, 4c).Send to the commodity take-out port 14 that rotates at slideway 7 from the commodity that stand 6a (or 6b, 6c) sends.Then, the user just can take out the commodity of sending from commodity take-out port 14.

Below, refrigerant loop of the present invention is described.Fig. 3 is the skeleton diagram of the embodiment of expression refrigerant loop of the present invention.As shown in Figure 3, refrigerant loop mainly comprises: compressor 51, gas cooler (radiator) 52, injector 53, gas-liquid separator 54, evaporimeter 55 and internal exchanger 56, their are connected and form can circulating refrigerant refrigerant circulation passage.In addition, in the present embodiment, cold-producing medium uses for example HFC (fluorine hydrogenated carbon) cold-producing medium or carbon dioxide.Particularly carbon dioxide be have do not burn, safety, incorrosive characteristic, and be the cold-producing medium little to the influence of ozone layer.

Compressor 51 compressed refrigerants make it to be the state of HTHP and supply in the gas cooler 52.As compressor 51, reciprocating compressor, rotor-type compressor, turbocompressor are arranged, perhaps can regulate the frequency-changeable compressor of its compressed capability etc.And, the compressor that can suitably use cost with the object that sets refrigerant loop, environment or refrigerant loop etc. to be consistent.

In addition, the structure of compressor 51 also can use Intermediate Heat Exchanger 511 to carry out the action of two sections compressions.The compressor 51 of two sections compressed actions of enforcement as shown in Figure 4 is when carrying out the action of two sections compressions, at the first compressor 51a that carries out one section compressed action with carry out being provided with Intermediate Heat Exchanger 511 between the second compressor 51b of two sections compressed actions.And after finishing one section compressed action by the first compressor 51a, this Intermediate Heat Exchanger 511 makes by the refrigerant cools that is in compressive state of first compressor 51a compression, and is sent among the second compressor 51b.So, compressor 51 carries out two sections compressed actions through Intermediate Heat Exchanger 511, might obtain high compression efficiency with lower power consumption, cold-producing medium is compressed to the state of the HTHP of expectation.The compressor that carries out two sections compressed actions 51 as shown in Figure 4 is particularly suitable for the situation of carbon dioxide as cold-producing medium.

Gas cooler 52 is used for making the high-temperature high-pressure refrigerant heat radiation of supplying with from compressor 51, and makes this cold-producing medium liquefaction.Gas cooler 52 uses the fin-and-tube type cooler that for example is made of copper pipe and aluminium fin.Though not clearly expression also is provided with gas cooler fan on gas cooler 52 in Fig. 3.Gas cooler fan is used for blowing to gas cooler 52, and it is driven by fan electromotor.

Injector 53 sucks the cold-producing medium of flash-pot 55 by the sucking action that utilizes the cold-producing medium of supplying with from gas cooler 52, makes to the suction pressure of compressor 51 by boosting simultaneously to raise.Injector 53 as shown in Figure 3 uses the two-phase flow type injector, is made of spray nozzle part 531, mixing portion 532 and diffusion part 533.Spray nozzle part 531 makes high-pressure refrigerant decompression and acceleration through gas cooler 52, and sucks the low pressure refrigerant through evaporimeter 55.This spray nozzle part 531 has the nozzle group valve 531a that is used to regulate the nozzle diameter that makes high-pressure refrigerant decompression usefulness.Mixing portion 532 makes high-pressure refrigerant mix mutually with low pressure refrigerant.Diffusion part 533 makes the discharge of boosting of the mix refrigerant of mixing.

Gas-liquid separator 54 makes the mix refrigerant of supplying with from injector 53 be separated into liquid phase refrigerant and vapor phase refrigerant, and makes vapor phase refrigerant turn back to compressor 51, and liquid phase refrigerant is supplied to evaporimeter 55.Gas-liquid separator 54 generally has the storage portion of the jar shape of the storage mix refrigerant of clearly not representing in the drawings, the vapor phase refrigerant that is stored in this storage portion top is returned to compressor 51, is stored in the liquid phase refrigerant that stores subordinate portion and then is fed into evaporimeter 55.In the present embodiment, use especially as at the gas-liquid separator as shown in Fig. 5～Fig. 7 54.

Gas-liquid separator 54 as shown in Figure 5 is made of gas-liquid separation portion 541 and liquid oil separation part 542.Pipe 541A and outer tube 541B in gas-liquid separation portion 541 has.Interior pipe 541A makes duct member form helical form.And for interior pipe 541A, its starting end 541Aa is connecting the exit (diffusion part 533) of injector 53, and its terminal 541Ab is connecting the suction inlet of compressor 51 (the first compressor 51a).In addition, interior pipe 541A is provided with through hole 541Ac forming spiral helicine radially outer position.Outer tube 541B is made of duct member, is covered the position of the through hole 541Ac that is provided with interior pipe 541A and is formed helical form with interior pipe 541A by its starting end 541Ba.And outer tube 541B branches out terminal 541Bb from interior pipe 541A, is connecting the porch of evaporimeter 55.

Gas-liquid separation portion 541 as shown in Figure 6 makes the mix refrigerant of supplying with from injector 53 pass through interior pipe 541A, is partial to radial outside by the mix refrigerant at helical form position owing to action of centrifugal force makes liquid phase refrigerant wherein.Then, through being arranged on the through hole 541Ac of helical form radially outer liquid phase refrigerant is transferred among the outer tube 541B.As a result, vapor phase refrigerant is separated with liquid phase refrigerant, among the pipe 541A, liquid phase refrigerant is delivered among the outer tube 541B in vapor phase refrigerant is delivered to.Wherein, be as shown in the figure towards side direction interior pipe 541A shown in Figure 5 and outer tube 541B spiral-shaped, but also can be towards above-below direction.

Liquid oil separation part 542 is set on the terminal 541Bb of the terminal 541Ab of interior pipe 541A of branch and outer tube 541B.As shown in Figure 5, on the terminal 541Bb of outer tube 541B, be provided with the 541Bc of trap portion.Form above also it can being sent to when the 541Bc of this trap portion forms below liquid phase refrigerant is sent to.Specifically, form helical form by terminal 541Bb to the side, and make this spiral helicine bottom become the 541Bc of trap portion outer tube 541B.Then, the bottom of the 541B of trap portion is positioned at the terminal 541Ab of the pipe 541A below this bottom through tube connector 542A and connecting.

As shown in Figure 7, for liquid oil separation part 542, in the 541Bc of trap portion, the oil that in liquid phase refrigerant, is contained, owing to its than the great bottom that is deposited to.This oil is to be used for relaxing the refrigerator oil that the mechanical friction in the compressor 51 is used.Then, be deposited in the refrigerator oil of the bottom of the 541Bc of trap portion, the terminal 541Ab place of pipe 541A in being sent to through tube connector 542A.Its result makes liquid phase refrigerant separate with refrigerator oil, and liquid phase refrigerant is sent among the outer tube 541B, manages among the 541A in vapor phase refrigerant and refrigerator oil are sent to together.

Evaporimeter 55 makes the liquid phase refrigerant evaporation of supplying with from gas-liquid separator 54, the temperature cooling around making by the heat around absorbing.Evaporimeter in the present embodiment for example uses the fin-tube type evaporator that is made of copper pipe and aluminium fin.Though do not show clearly that in Fig. 3 evaporimeter 55 is provided with evaporator fan, this evaporator fan is blown to evaporimeter, is driven by fan electromotor.

Evaporimeter 55 for example is configured in the cool house internal of the heat insulation structural in automatic vending machine, freezer, freezing display case unit, refrigerated display cabinet or the beverage sales machine etc.Particularly in the present embodiment, in automatic vending machine, accommodate storehouse (cold room) 4a, 4b and 4c, and accommodate configuration evaporimeter 55 (55a, 55b, 55c) among storehouse 4a, 4b and the 4c at each respectively in order to cool off a plurality of (three) commodity respectively independently.In other words, evaporimeter 55a, 55b and 55c are being connected the passage separately to three branches from the terminal 541Ab of the interior pipe 541A of gas-liquid separator 54 side by side.In addition, each evaporimeter 55a, 55b in each passage of branch and the porch of 55c are respectively arranged with magnetic valve 551a, 551b and 551c as switch valve.And, by optionally opening each magnetic valve 551a, 551b and 551c, and the liquid phase refrigerant from gas-liquid separator 54 can be supplied among each evaporimeter 55a, 55b and the 55c.In addition, the passage of the outlet of each evaporimeter 55a, 55b and 55c is connected the suction inlet place of the spray nozzle part 531 in the injector of gathering each other 53.

For internal exchanger 56, it is used for making high-pressure refrigerant and the low pressure refrigerant supplied with to injector 53 to carry out heat exchange mutually.Internal exchanger 56 is arranged between gas cooler 52 and the injector 53 and between evaporimeter 55 and the injector 53.As Fig. 8～shown in Figure 12, internal exchanger 56 is provided with high-pressure refrigerant pipeline 561 between gas cooler 52 and injector 53.In addition, internal exchanger 56 is provided with low pressure refrigerant pipeline 562 between evaporimeter 55 and injector 53.High-pressure refrigerant pipeline 561 is configured in the inside of low pressure refrigerant pipeline 562.In addition, high-pressure refrigerant pipeline 561 is provided with many bunchys (being three the in the present embodiment) pipeline that pyroconductivity is high.So, internal exchanger 56 forms the structure that disposes the dual pipeline of high-pressure refrigerant pipeline 561 in low pressure refrigerant pipeline 562.

Internal exchanger 56 has the form of many high-pressure refrigerant pipelines 561 and form helical form on above-below direction with the internal configurations at low pressure refrigerant pipeline 562.More particularly, high-pressure refrigerant pipeline 561 is as Fig. 8～shown in Figure 11, become the inlet portion 561a that spiral helicine lower end is provided with high-pressure refrigerant pipeline 561 in form, and be provided with the 561b of export department of high-pressure refrigerant pipeline 561 in spiral upper end with many pipelines of bunchy.This inlet portion 561a and the 561b of export department are the mouths of port formation with many high-pressure refrigerant pipelines 561.On the other hand, low pressure refrigerant pipeline 562 as shown in figure 12, covers the outside of high-pressure refrigerant pipeline 561, as Fig. 8～shown in Figure 11, makes helical form with high-pressure refrigerant pipeline 561.This low pressure refrigerant pipeline 562 is provided with inlet portion 562a becoming spiral helicine upper end, is provided with the 562b of export department becoming spiral helicine lower end.So, internal exchanger 56 forms and makes high-pressure refrigerant pipeline 561 refrigerant conveying from top to bottom, and make low pressure refrigerant pipeline 562 form of refrigerant conveying from top to bottom, thereby make the high-pressure refrigerant of high temperature and the low pressure refrigerant of low temperature form adverse current.

And, around low pressure refrigerant pipeline 562, be provided with and have flexible insulating tubular material 563, make heat exchange between low pressure and high pressure not be subjected to the influence of external environment.

Wherein, internal exchanger 56 is not limited to structure as above, though clearly expression among the figure also can be to be in contact with one another the high-pressure refrigerant pipeline of high thermal conductivity and low pressure refrigerant pipeline stem for stem that installation is formed by connecting.

; accommodate under the situation that disposes evaporimeter 55 (55a, 55b, 55c) among storehouse 4a, 4b, the 4c respectively at each commodity of aforesaid automatic vending machine, consider to have with three storehouses and cool off, have only two or the situation that storehouse cooling corresponding each evaporimeter 55a, 55b, 55c move fully.For example, for the situation that whole (three) evaporimeters 55 all move, in the situation of an evaporimeter 55 actions, the surplus of low pressure refrigerant just increases.In other words, the load of evaporimeter 55 takes place significantly to change, and the amount of the low pressure refrigerant of suction will change, and the refrigerant pressure in injector 53 is just change also, thereby recurrent state is changed.More particularly, raise, liquid phase refrigerant is turned back in the compressor 51 as the pressure in the circulation canal of on high-tension side compressor 51, gas cooler 52, injector 53 and gas-liquid separator 54.As a result, reduced cooling effectiveness, difference according to circumstances, compressor 51 damages sometimes.Therefore, utilize the high-pressure refrigerant of discharging from gas cooler 52 that the latent heat of the low pressure refrigerant of the surplus that produced by internal exchanger 56 is cooled off, raise to prevent on high-tension side pressure.In other words, make high-pressure refrigerant and low pressure refrigerant carry out heat exchange by internal exchanger 56, the refrigerant density that injector 53 is sucked keeps certain, realizes the optimization of recurrent state.

Figure 13 is the figure that expression is carried out high-pressure refrigerant and low pressure refrigerant heat exchange by internal exchanger 56.In Figure 13, the situation that the evaporimeter 55 in three storehouses all moves represents to have only the situation of evaporimeter 55 actions in a storehouse to dot with solid line.When carrying out heat exchange by internal exchanger 56, as shown in figure 13, temperature did not raise when low pressure refrigerant began, and just latent heat changes, and followed by the sensible heat variation high-pressure refrigerant to be cooled off.Therefore, along with the degree of superheat of low pressure refrigerant is evaporated and made the refrigerant density that injector 53 sucks and keeps certain, thereby realize the optimization of recurrent state.Wherein, for internal exchanger 56, under the situation that the evaporimeter 55 in three storehouses all moves, with carry out heat exchange respectively under the situation of evaporimeter 55 action of having only two or one storehouses, owing to before finishing heat exchange under the situation in a storehouse, need very long distance (length), so will get the Len req L that is consistent with the situation in a storehouse.Because internal exchanger in the present embodiment 56 is made into helical form, so only need just can obtain Len req with the space of saving very much.

Wherein, in above-mentioned refrigerant loop, as shown in Figure 3, between gas-liquid separator 54 and evaporimeter 55, be branched off into each evaporimeter 55 (55a, 55b, 55c) position before in the interior pipe 541A of gas-liquid separator 54 outlet and be provided with electric expansion valve 57.57 pairs of low pressure refrigerants of being supplied with by gas-liquid separator 54 of electric expansion valve reduce pressure and control evaporating temperature and flow.In addition, in above-mentioned refrigerant loop, between each magnetic valve 551a, 551b, 551c and each evaporimeter 55a, 55b, 55c, be provided with capillary 58.Because capillary 58 forms spiral helicine impedance pipeline, so that the corresponding low pressure refrigerant of supplying with from gas-liquid separator 54 with each evaporimeter 55a, 55b, 55c reduce pressure.This capillary 58 is accommodated under the different situation of the size (volume) of storehouse 4a, 4b, 4c at each commodity of configuration each evaporimeter 55a, 55b, 55c, is particularly suitable for the low pressure refrigerant that each evaporimeter of subtend 55a, 55b, 55c supply with and reduces pressure.In addition, above-mentioned electric expansion valve 57 and capillary 58 can the both be provided with, and wherein any also can be set.

In addition, in above-mentioned automatic vending machine, be suitable under the situation of above-mentioned refrigerant loop,, be configured to accommodate on the bottom and Machine Room 5 that storehouse 4a, 4b, 4c separated by slideway 7 across commodity as Fig. 3, Figure 14 and refrigerant loop shown in Figure 15.Accommodate at commodity and to dispose evaporimeter 55 and evaporator fan (not shown) among storehouse 4a, 4b, the 4c, in Machine Room 5, dispose compressor 51, gas cooler 52, gas cooler fan (not shown), magnetic valve 551a, 551b, 551c, internal exchanger 56, electric expansion valve 57 and capillary 58.In the present embodiment, accommodating regulated commodity that the front among storehouse 4a, 4b, the 4c keeps left at commodity, to accommodate storehouse 4a be that cooling is special-purpose.Accommodate among the 4a of storehouse at the regulated commodity that this cooling is special-purpose, dispose injector 53 and gas-liquid separator 54.In addition, accommodate storehouse 4b at positive middle commodity and accommodate storehouse 4c, dispose heater 59, can between cooling and heating, switch with the commodity of keeping right.Wherein, accommodate the gas-liquid separator 54 that also can only dispose among the 4a of storehouse in injector 53 and the gas-liquid separator 54 at the commodity of regulation.

In addition, as mentioned above, accommodate storehouse 4b towards the front at the commodity of centre and be equipped with a row stand 6b, to accommodate storehouse 4a, 4c its volumetric ratio of comparing less with the other commodity that are equipped with two row stand 6a.Therefore, when the commodity of centre being accommodated the storehouse cooling, accommodate at the commodity of other both sides under the situation of storehouse cooling or heating, be subjected to invading the influence of heat, make to be configured in the load change amplitude increase that intermediate commodity is accommodated the evaporimeter in the storehouse.Therefore, the internal circulating load of cold-producing medium is corresponding with the peak load of accommodating the evaporimeter in the storehouse at the commodity of centre (accommodating at other both sides commodity under the situation of storehouse heating).And, in the present embodiment, as shown in Figure 3, accommodate the outlet of the evaporimeter 55b among the 4b of storehouse and be configured in and accommodate between the inlet of the evaporimeter 55a among the 4a of storehouse being disposed at commodity, through as the magnetic valve 61 of switch valve and the bypass 60 that is being connected in series as the special-purpose commodity of cooling.In addition, as the outlet of evaporimeter 55b, on the position and the passage between the bypass 60 of two other evaporimeter 55a and 55c set part, be provided with magnetic valve 62 as switch valve.In other words, accommodate under the situation that storehouse 4a, 4b, 4c be cooled all at commodity, perhaps accommodate under the situation that storehouse 4a, 4b be cooled at left side and middle commodity, commodity beyond in the middle of making accommodate that storehouse 4a, 4c reach proper temperature and the action that stops evaporimeter 55a, 55c, and just the less intermediate commodity of the volumetric ratio evaporimeter 55b that accommodates storehouse 4b is in the state of action.Because under such state, between the inlet of the outlet of evaporimeter 55b and evaporimeter 55a, be connected in series, the remaining cold-producing medium in evaporimeter 55b is evaporated, so evaporimeter 55b can individual operation in evaporimeter 55a.In addition, internal exchanger 56 refrigerant density is in the past reduced.As a result, the refrigerant density that injector 53 is sucked becomes necessarily, makes recurrent state reach optimization.

Below, the control system of above-mentioned refrigerant loop is described.Figure 16 is the block diagram of expression refrigerant loop control system.As shown in figure 16, refrigerant loop has refrigerant loop control part 100.Refrigerant loop control part 100, when refrigerant loop moves, for according to the program or the data that are stored in advance in the memory 101, with the cooling capacity long term maintenance of refrigerant loop under suitable state, and will be to the nozzle group valve 531a of compressor 51, electric expansion valve 57, magnetic valve 551a, 551b, 551c, 61,62, injector 53, be arranged on evaporator fan 63a, 63b, the 63c on each evaporimeter 55a, 55b, the 55c and the gas cooler fan 64 that is arranged on the gas cooler 52 is controlled.In order to control, with the cooling capacity long term maintenance of refrigerant loop under suitable state, and on this refrigerant loop control part 100, connect high-pressure sensor 71, middle pressure pressure sensor 72, low-pressure sensor 73, gas cooler exit temperature sensor 74, environment temperature sensor 75, the first evaporator inlet temperature sensor 76a, the second evaporator inlet temperature sensor 76b, the 3rd evaporator inlet temperature sensor 76c, the first evaporator outlet temperature sensor 77a, the second evaporator outlet temperature sensor 77b, the 3rd evaporator outlet temperature sensor 77c, the first storehouse temperature sensor 78a, the second storehouse temperature sensor 78b, the 3rd storehouse temperature sensor 78c and internal exchanger outlet temperature sensor 79.

As shown in Figure 3, high-pressure sensor 71 is arranged between compressor 51 and the gas cooler 52, is used for detecting the pressure by compressor 51 refrigerant compressed.Middle pressure pressure sensor 72 is arranged between injector 53 and the gas-liquid separator 54, is used for detecting the pressure of the cold-producing medium that is boosted by injector 53.Low pressure refrigerant sensor 73 is arranged between electric expansion valve 57 and the evaporimeter 55, is used for detecting the pressure by the cold-producing medium of electric expansion valve 57 decompressions.Gas cooler exit temperature sensor 74 is arranged on the exit of gas cooler 52, is used for detecting the outlet temperature of gas cooler 52.Environment temperature sensor 75 is arranged on for example place such as automatic vending machine outside, is used for detecting the environment temperature of automatic vending machine.The first evaporator inlet temperature sensor 76a is arranged on the porch of evaporimeter 55a, is used for detecting the inlet temperature of evaporimeter 55a.The second evaporator inlet temperature sensor 76b is arranged on the porch of evaporimeter 55b, is used for detecting the inlet temperature of evaporimeter 55b.The 3rd evaporator inlet temperature sensor 76c is arranged on the porch of evaporimeter 55c, is used for detecting the inlet temperature of evaporimeter 55c.The first evaporator outlet temperature sensor 77a is arranged on the exit of evaporimeter 55a, is used for detecting the outlet temperature of evaporimeter 55a.The second evaporator outlet temperature sensor 77b is arranged on the exit of evaporimeter 55b, is used for detecting the outlet temperature of evaporimeter 55b.The 3rd evaporator outlet temperature sensor 77c is arranged on the exit of evaporimeter 55c, is used for detecting the outlet temperature of evaporimeter 55c.The first storehouse temperature sensor 78a is arranged on the commodity that constitute heat insulation environment and accommodates in the 4a of storehouse, is used for detecting the storehouse temperature that commodity are accommodated storehouse 4a.The second storehouse temperature sensor 78b is arranged on the commodity that constitute heat insulation environment and accommodates in the 4b of storehouse, is used for detecting the storehouse temperature that commodity are accommodated storehouse 4b.The 3rd storehouse temperature sensor 78c is arranged on the commodity that constitute heat insulation environment and accommodates in the 4c of storehouse, is used for detecting the storehouse temperature that commodity are accommodated storehouse 4c.Internal exchanger outlet temperature sensor 79 is arranged on the low pressure refrigerant exit of internal exchanger 56, is used for detecting the temperature of this low pressure refrigerant.

Figure 17 is the flow chart of expression refrigerant loop control part control action.As shown in figure 17, under the situation that makes the refrigerant loop action, begin to start compressor 51 (step S1).That is, in refrigerant loop, the cold-producing medium that is compressed into HTHP in compressor 51 is dispelled the heat in gas cooler 52 and become high-pressure refrigerant.Then, high-pressure refrigerant and the low pressure refrigerant of being discharged by evaporimeter 55 (55a, 55b, 55c) carry out heat exchange in internal exchanger 56, make the high-pressure refrigerant cooling with the latent heat that remains low pressure refrigerant.Then, in injector 53, will suck the low pressure refrigerant of flash-pot 55 (55a, 55b, 55c), boost while mix from the high-pressure refrigerant decompression of gas cooler 52.Then, in gas-liquid separator 54, be separated into vapor phase refrigerant, liquid phase refrigerant and refrigerator oil, liquid phase refrigerant is supplied in the evaporimeter 55 (55a, 55b, 55c), vapor phase refrigerant and refrigerator oil are turned back in the compressor 51.Therefore, in evaporimeter 55 (55a, 55b, 55c), make liquid phase refrigerant evaporation and absorb heat, commodity are accommodated in storehouse 4a, 4b, 4c the storehouse in cool off.

When such startup compressor 51 makes the refrigerant loop action, refrigerant loop control part 100, the temperature data that obtained the pressure data that detects by each pressure sensor 71,71,73, detects by each temperature sensor 74,75,76a, 76b, 76c, 77a, 77b, 77c, 78a, 78b, 78c and 79 and each magnetic valve 551a, 55ab, 551c, 61,62 and the running-active status (step S2) of nozzle group valve 531a.

Obtaining commodity at refrigerant loop control part 100, to accommodate the storehouse temperature of storehouse 4a, 4b, 4c be that this storehouse temperature is lower than under the situation of set point of temperature, and magnetic valve 551a, 551b, 551c close, and evaporimeter 55a, 55b, 55c stop action.Therefore, evaporimeter 55 actions sometimes, sometimes two or all evaporimeter 55 all move.So, if the operating state of evaporimeter 55 changes, then evaporating temperature and high-pressure have very big variation.When evaporating temperature improved, commodity accommodated that the temperature difference between the environment diminishes in storehouse 4a, 4b, 4c and the storehouse, and the heat of exchange reduces in evaporimeter 55.Otherwise, when evaporating temperature reduces,, the electric power of consumption is increased because the operational efficiency of compressor 51 reduces, circulating mass of refrigerant reduces diminishes cooling capacity.Therefore, in refrigerant loop control part 100, the aperture of regulating electric expansion valve 57 and nozzle group valve 531a by each pressure state of obtaining or each state of temperature.

Then, refrigerant loop 100 judges that the aperture of electric expansion valve 57 and nozzle group valve 531a has no change, under vicissitudinous situation (step S3: change), obtain the aperture variable quantity (step S4) of electric expansion valve 57 and nozzle group valve 531a, make this aperture change (step S5).

At Figure 18 and above-mentioned judgement of Figure 19 illustrated and aperture variable quantity.Figure 18 represents to regulate electric expansion valve 57 and nozzle group valve 531a aperture by the inlet temperature of evaporimeter 55, control evaporating temperature one form regularly.As shown in figure 18, the inlet temperature of evaporimeter 55 is optimum when (for example-9 ℃～-12 ℃) in prescribed limit, and at this moment, data are according to the rules kept this aperture, and the aperture of electric expansion valve 57 is judged as " maintain the statusquo (not changing) ".In addition, when the inlet temperature of evaporimeter 55 more than the prescribed limit when (for example more than-8 ℃), the aperture of electric expansion valve 57 is judged as " tightening up ", obtains aperture variable quantity " P (plus) ".And in the inlet temperature of evaporimeter 55 below prescribed limit when (for example-13 ℃ below), the aperture of electric expansion valve 57 is judged as " relieving ", obtains aperture variable quantity "+P (plus) ".On the other hand, as shown in figure 18, the inlet temperature of evaporimeter 55 is optimum when prescribed limit (for example-9 ℃～-12 ℃), at this moment, according to predefined data the aperture of nozzle group valve 531a is judged as " maintain the statusquo (not changing) ", keeps this aperture.In addition, when the inlet temperature of evaporimeter 55 more than the prescribed limit when (for example more than-8 ℃), the aperture of nozzle group valve 531a is judged as " tightening up ", obtains aperture variable quantity " P (plus) ".And in the inlet temperature of evaporimeter 55 below prescribed limit when (for example-13 ℃ below), the aperture of nozzle group valve 531a is judged as " relieving ", obtains aperture variable quantity "+P (plus) ".

Figure 19 represents to regulate according to the difference of the inlet temperature of evaporimeter 55 and outlet temperature the aperture of electric expansion valve 57, the certain chart of the control degree of superheat.As shown in figure 19, be optimum with the temperature difference (for example 5～10 ℃) in prescribed limit of the inlet temperature-outlet temperature of evaporimeter 55, judge that aperture is " maintain the statusquo (constant) " this moment, the aperture amount that obtains electric expansion valve 57 is " 0 ".In addition, under the situation of (for example 15 ℃) more than the afore mentioned rules scope, judge that the aperture of electric expansion valve is open to the outside world, obtain the aperture amount and be "+10 (plus) " in the temperature difference of the inlet temperature-outlet temperature of evaporimeter 55.And in the temperature difference of the inlet temperature-outlet temperature of evaporimeter 55 under the situation of (for example 2 ℃) below the above-mentioned scope, judge that the aperture of electric expansion valve 57 be " tightening up ", obtaining the aperture amount is " 10 (plus) ".On the other hand, as shown in figure 19, be optimum with the temperature difference (for example 5 ℃～10 ℃) in prescribed limit of the inlet temperature-outlet temperature of evaporimeter 55, judge that the aperture of nozzle group valve 531a is " maintain the statusquo (not changing) " this moment, obtain the aperture amount and be " 0 ".In addition, under the situation of (for example 15 ℃) more than the afore mentioned rules scope, judge that the aperture of nozzle group valve 531a is open to the outside world, obtain the aperture amount and be "+5 (plus) " in the temperature difference of the inlet temperature-outlet temperature of evaporimeter 55.And in the temperature difference of the inlet temperature-outlet temperature of evaporimeter 55 under the situation of (for example 3 ℃) below the above-mentioned scope, judge that the aperture of nozzle group valve 531a be " tightening up ", obtaining the aperture amount is " 5 (plus) ".

Figure 20 is the flow chart of other control action of expression refrigerant loop control part.As shown in figure 20, under the situation that makes the refrigerant loop action, start compressor 51 (step S21).That is, in refrigerant loop, make and dispelled the heat in gas cooler 52 by the cold-producing medium of compressor 51 boil down to HTHPs and become high-pressure refrigerant.Then, high-pressure refrigerant and the low pressure refrigerant of being discharged by evaporimeter 55 (55a, 55b, 55c) carry out heat exchange in internal exchanger 56, with the latent heat cooling high-pressure refrigerant of unnecessary low pressure refrigerant.Then, make the high-pressure refrigerant decompression from gas cooler 52 in injector 53, suction simultaneously comes the low pressure refrigerant of flash-pot 55 (55a, 55b, 55c) to make it to mix and boost.Then, in gas-liquid separator 54, vapor phase refrigerant, liquid phase refrigerant and refrigerator oil are separated, liquid phase refrigerant is supplied in the evaporimeter 55 (55a, 55b, 55c), vapor phase refrigerant and refrigerator oil are turned back in the compressor 51.Thus, in evaporimeter 55 (55a, 55b, 55c), make liquid phase refrigerant evaporation and absorb heat, commodity are accommodated in the storehouse of storehouse 4a, 4b and 4c and cool off.

When making the refrigerant loop action like this starting compressor 51, refrigerant loop control part 100 is just obtained the temperature data (step S22) that the pressure data that detected by each pressure sensor 71,72,73 and each temperature sensor 74,75,76a, 76b, 76c, 77a, 77b, 77c, 78a, 78b, 78c and 79 detect.

Use refrigerant loop control part 100, calculate the refrigerant density (step S23) that flows into the injector 53 from high-pressure, low pressure, evaporator outlet temperature and storehouse temperature.At this moment, be at cold-producing medium under the situation of critical condition, just calculate refrigerant density from pressure and temperature.And be at cold-producing medium under the situation of subcritical state, calculate the internal circulating load of cold-producing medium by high-pressure and low pressure, calculate the heat of evaporimeter 55 exchanges by storehouse temperature, extrapolate the mass dryness fraction of cold-producing medium.Then, calculate refrigerant density from circulating mass of refrigerant and cold-producing medium drimeter.

Then, the refrigerant density of 100 pairs of reckonings of refrigerant loop control part and predefined refrigerant density setting value compare, the aperture of judging electric expansion valve 57 has the air quantity of no change or evaporator fan 63a, 63b and 63c that no change is arranged, (step S24: change is arranged) under the situation of change arranged, obtain aperture variation, evaporator fan 63a, the 63b of electric expansion valve 57, the air quantity variation (step S25) of 63c, make this aperture, air quantity change (step S26).

In step S24, the setting value of refrigerant density changes with the value of high-pressure or low pressure.In other words, shown in Figure 21-1, will be according to the scope (P＜P11 of high-pressure, P11≤P＜P12, P13≤P＜P14, P14≤P＜P15, P 〉=P15) preestablish the upper limit (ρ 1, ρ 3, ρ 5, ρ 7, ρ 9) and the lower limit (ρ 2, ρ 4, ρ 6, ρ 8, ρ 10) of refrigerant density setting value.In addition, shown in Figure 21-2, scope (P＜P11 according to low pressure, P11≤P＜P12, P13≤P＜P14, P14≤P＜P15, P 〉=P15) preestablish the upper limit (ρ 11, ρ 13, ρ 15, ρ 17, ρ 19) and the lower limit (ρ 12, ρ 14, ρ 16, ρ 18, ρ 20) of refrigerant density setting value.

Then, in step S24, as shown in figure 22, being optimum when (lo ρ≤ρ≤ρ hi) in the prescribed limit of refrigerant density ρ between refrigerant density setting value lower limit ρ lo and refrigerant density setting value upper limit ρ hi of calculating with respect to refrigerant density setting value lower limit ρ lo and refrigerant density setting value upper limit ρ hi, the aperture of judging electric expansion valve 57 this moment is kept its aperture for " maintain the statusquo (not changing) ".And set value in refrigerant density under the situation of (ρ＜ρ lo) below the lower limit ρ lo at the refrigerant density ρ that calculates, judge that the aperture of electric expansion valve 57 is open to the outside world, obtain aperture amount "+P (plus) ".Then, (under the situation of ρ hi＜ρ), judging that the aperture of electric expansion valve 57 is " tightening up ", obtaining aperture amount " P (plus) " more than the refrigerant density setting value upper limit ρ hi at the refrigerant density ρ that calculates.

In addition, in step S24, as shown in figure 23, being optimum when (lo ρ≤ρ≤ρ hi) in the prescribed limit of refrigerant density ρ between refrigerant density setting value lower limit ρ lo and refrigerant density setting value upper limit ρ hi of calculating with respect to refrigerant density setting value lower limit ρ lo and refrigerant density setting value upper limit ρ hi, the air quantity of judging evaporator fan 63a, 63b, 63c this moment is kept its air quantity for " maintain the statusquo (not changing) ".And set value in refrigerant density under the situation of (ρ＜ρ lo) below the lower limit ρ lo at the refrigerant density ρ that calculates, judge that the air quantity of evaporator fan 63a, 63b, 63c is " reduction ", obtain air quantity " Q ".Then, (under the situation of ρ hi＜ρ), judging that the air quantity of evaporator fan 63a, 63b, 63c is " increase ", obtaining air quantity "+Q " more than the refrigerant density setting value upper limit ρ hi at the refrigerant density ρ that calculates.At this, when changing the air quantity of evaporator fan 63a, 63b, 63c, can change the voltage and the duty factor (hereinafter referred to as the Duty ratio) that apply.Under variation applies voltage condition, be low-voltage " Q " or high voltage "+Q ".Under the situation that changes the Duty ratio, reduce the Duty ratio and obtain " Q ", perhaps improve the Duty ratio and obtain "+Q ".As shown in figure 24, the Duty ratio be " ON/OFF (ON/OFF) " of voltage in some cycles that when the instruction of evaporator fan, apply " opening (ON) " ratio (Duty compare=open time/(time of opening+closing): Duty ratio=ON time/(time of ON+OFF)).

As mentioned above, in above-mentioned refrigerant loop, comprise the internal exchanger 56 that makes the high-pressure refrigerant supplied with to injector 53 and low pressure refrigerant carry out heat exchange mutually.Promptly, even load variations take place and make under the situation that the low pressure refrigerant amount of suction side changes at evaporimeter 55, also can be used to make the high-pressure refrigerant cooling of discharging, prevent that on high-tension side pressure from rising from gas cooler 52 from the latent heat of the residue low pressure refrigerant of internal exchanger 56.As a result,, make the refrigerant density that in injector 53, sucks keep certain, can make recurrent state become optimization along with the degree of superheat of low pressure refrigerant is evaporated.

Particularly as automatic vending machine etc. and so on, accommodate under the situation that disposes evaporimeter 55 (55a, 55b, 55c) among storehouse 4a, 4b, the 4c respectively at a plurality of commodity, can make the evaporimeter 55 of action that significantly load change takes place owing to reduce the quantity of the evaporimeter 55 of action, but carry out the heat exchange of high-pressure refrigerant and low pressure refrigerant by internal exchanger 56, the refrigerant density that makes injected device 53 suck keeps certain, can realize the optimization of recurrent state.

In above-mentioned refrigerant loop, accommodate the evaporimeter 55b that disposes among the 4b of storehouse at the less intermediate commodity of volumetric ratio, via magnetic valve 61 be in series accommodating the evaporimeter 55a that disposes among the 4a of storehouse as the special-purpose left side commodity of cooling.In other words, because remaining cold-producing medium evaporates in evaporimeter 55b, make that evaporimeter 55b is not isolated operation in evaporimeter 55a.In addition, the refrigerant density before internal exchanger 56 is reduced.As a result, owing to reduced the circulating mass of refrigerant of evaporimeter 55b, thus can reduce evaporating temperature, improve operational efficiency.

In above-mentioned refrigerant loop, in gas-liquid separator 54, constitute by interior pipe 541A and outer tube 541B, pipe 541A is connected and forms helical form between injector 53 and the compressor and be provided with through hole 541Ac at radially outer position in being somebody's turn to do, this outer tube 541B covers interior pipe 541A and is provided with the position of through hole 541Ac and forms helical form with interior pipe 541A, and the terminal of telling from interior pipe 541A is connecting evaporimeter 55.Promptly, make the mix refrigerant of supplying with by injector 53 by interior pipe 541A, mix refrigerant by the helical form position, liquid phase refrigerant wherein is owing to action of centrifugal force is partial to radial outside, via through hole 541Ac liquid phase refrigerant is transplanted among the outer tube 541B, liquid phase refrigerant is separated with vapor phase refrigerant, vapor phase refrigerant is delivered in the compressor 51, and liquid phase refrigerant is sent in the evaporimeter 55.As a result, owing to adopted the structure of the dual pipe of helical form, compare, can realize miniaturization with having the gas-liquid separator of prior art that mix refrigerant is separated into the jar of the liquid phase refrigerant of storage and vapor phase refrigerant.Particularly in internal configurations that the commodity of automatic vending machine are accommodated storehouse 4a as mentioned above under the situation of gas-liquid separator 54, owing to realizing that gas-liquid separator 54 miniaturizations have improved space efficiency.

In addition, in gas-liquid separator 54, be provided with the 541Bc of trap portion in the terminal of outer tube 541B, the 541Bc of this trap portion is connecting the terminal 541Ab that is positioned at the pipe 541A below the 541Bc of trap portion via tube connector 542A.Promptly, in the 541Bc of trap portion, contained refrigerator oil in liquid phase refrigerant, owing to self proportion is deposited to the bottom, be transplanted on the terminal 541Ab of interior pipe 541A via tube connector 542A, thereby liquid phase refrigerant is separated with refrigerator oil, and liquid phase refrigerant is sent in the evaporimeter 55, and refrigerator oil is sent in the compressor 51 with vapor phase refrigerant.As a result, by the structure of the 541Bc of trap portion is set, the oil eliminator of the prior art of the jar that separates with refrigerator oil with cold-producing medium in the cold-producing medium with the storage of making is compared, and interior pipe can be realized miniaturization.Particularly because the interior pipe 541A of gas-liquid separator 54 turns to the structure of separating refrigerator oil with outer tube 541B one, pipe carries out the separation of gas, liquid, oil in making with good efficiency.Particularly as mentioned above under the situation of gas-liquid separator 54, can improve space efficiency by the miniaturization that realizes gas-liquid separator 54 in internal configurations that the commodity of automatic vending machine are accommodated storehouse 4a.

In above-mentioned refrigerant loop, in refrigerant loop control part 100, regulate the nozzle group valve 531a of injector 53 and the aperture of electric expansion valve 57, make in the refrigerant temperature that detects by evaporator inlet temperature sensor 76a, 76b, 76c in prescribed limit.Perhaps in refrigerant loop control part 100, regulate the aperture of nozzle group valve 531a and electric expansion valve 57, make the difference of the refrigerant temperature that the refrigerant temperature that detected by evaporator inlet temperature sensor 76a, 76b, 76c and evaporator outlet temperature sensor 77a, 77b, 77c detect in prescribed limit.Promptly, accommodating storehouse 4a, 4b, 4c at a plurality of commodity of automatic vending machine etc. and so on disposes respectively under the situation of evaporimeter 55 (55a, 55b, 55c), obtaining that commodity are accommodated the storehouse temperature of storehouse 4a, 4b, 4c and this storehouse temperature is lower than under the situation of set point of temperature, magnetic valve 551a, the 551b of this evaporimeter 55a, 55b, 55c, 551c closure stop the action of evaporimeter 55a, 55b, 55c.Therefore, evaporimeter 55 actions sometimes, sometimes two or all evaporimeter 55 all move.So, when the operating state of evaporimeter 55 changed, evaporating temperature and high-pressure just changed significantly.In above-mentioned refrigerant loop control part 100, owing to the aperture of regulating electric expansion valve 57 and nozzle group valve 531a by each pressure state of obtaining or each state of temperature, so the evaporating temperature that causes with regard to the variation that has suppressed by evaporimeter 55 operating states and the variation of high-pressure are so can make the heat exchange amount of evaporimeter 55 and the operational efficiency of compressor 51 reach optimization.

In above-mentioned refrigerant loop, will be according to the refrigerant pressure that detects by high-pressure sensor 71 and low-pressure sensor 73, by above-mentioned evaporator inlet temperature sensor 76a, 76b, the refrigerant temperature that 76c detects and by storehouse temperature sensor 78a, 78b, the refrigerant density ρ that the refrigerant pressure that 78c detects is calculated, with the predefined refrigerant density setting value of the refrigerant pressure that detects according to high-pressure sensor 71 and low-pressure sensor 73 ρ lo, ρ hi compares, regulate the aperture and the evaporator fan 63a of electric expansion valve 57,63b, the air quantity of 63c, the feasible refrigerant density ρ that calculates within the limits prescribed.Promptly, accommodating storehouse 4a, 4b, 4c at a plurality of commodity of automatic vending machine etc. and so on disposes respectively under the situation of evaporimeter 55 (55a, 55b, 55c), the storehouse temperature of accommodating storehouse 4a, 4b, 4c at the commodity of obtaining is lower than under the situation of set point of temperature, magnetic valve 551a, the 551b of this evaporimeter 55a, 55b, 55c, 551c closure make evaporimeter 55a, 55b, 55c stop action.Therefore, evaporimeter action sometimes, sometimes two or all evaporimeter all move.So, when the operating state of evaporimeter 55 changed, evaporating temperature and high-pressure just changed significantly.In above-mentioned refrigerant loop control part 100, under the situation of the refrigerant density ρ that calculates less than refrigerant density setting value lower limit ρ lo, the aperture of electric expansion valve 57 is decontroled, reduce the air quantity of evaporator fan 63a, 63b, 63c, increase circulating mass of refrigerant and make the cold-producing medium in evaporimeter 55 more be difficult to gasification, refrigerant density is improved.Otherwise, surpass at the refrigerant density ρ that calculates under the situation of refrigerant density setting value upper limit ρ hi, the aperture of electric expansion valve 57 is tightened up, and increases the air quantity of evaporator fan 63a, 63b, 63c, make and the easier gasification of cold-producing medium in evaporimeter 55 refrigerant density is reduced.As a result, suppressed the variation of evaporating temperature and high-pressure, made the heat exchange amount of evaporimeter 55 or the operational efficiency of compressor 51 can reach optimization by the variation of evaporimeter 55 operating states.

In addition, above-mentioned refrigerant loop is effective especially when using carbon dioxide as cold-producing medium, under the situation of using carbon dioxide coolant, can access above-mentioned effect.

Wherein, in aforesaid embodiment, illustrated as refrigerant loop to make the commodity of automatic vending machine accommodate the structure of storehouse 4a, 4b, 4c cooling, also can heat simultaneously but required commodity are accommodated the storehouse.Figure 25 be use evaporimeter as the situation of heater under the skeleton diagram of refrigerant loop.

Cooling system at first is described.As shown in figure 25, the structure of compressor 51 is to use Intermediate Heat Exchanger 511 to implement the compressor of two sections compressed actions.That is, at the first compressor 51a that carries out one section compressed action with carry out being provided with Intermediate Heat Exchanger 511 between the second compressor 51b of two sections compressed actions.By these compressor 51 refrigerant compressed, supply in the gas cooler 52 and dispel the heat, in internal exchanger 56, carry out after the heat exchange again via injector 53, gas-liquid separator 54 and electric expansion valve 57.Then, cold-producing medium from electric expansion valve 57 supplies, select and evaporate in each evaporimeter 55 (55a, 55b, 55c, 55d) that arrives by the switching of each magnetic valve 551a, 551b, 551c, 551d, make each commodity accommodate storehouse (in Figure 25, showing) cooling.The cold-producing medium of process evaporimeter 55 carries out heat exchange and is inhaled into once more in the injector 53 in internal exchanger 56.This structure is identical with above-mentioned refrigerant loop.

The following describes heating system.At this, use evaporimeter 55c as heater.Connect as follows in the case.Be connected via magnetic valve 80 between the outlet of compressor 51 (51b) and the inlet of evaporimeter 55c.Be connected via magnetic valve 81 between the outlet of the outlet of evaporimeter 55c and gas cooler 52.Be connected via magnetic valve 82 between the inlet of the outlet of evaporimeter 55c and gas cooler 52.Then, between compressor 51 (51b) and gas cooler 52, be provided with magnetic valve 83.And, in outlet, between the set position of the branch part of the outlet of gas cooler 52 and inlet and each evaporimeter 55, be provided with magnetic valve 84 as evaporimeter 55c.And, be provided with check (non-return) valve 91 between position, interflow from compressor 51 (51b) and the magnetic valve 551c at inlet as evaporimeter 55c, prevent from adverse current to take place to magnetic valve 551c.And, from the magnetic valve that is exported to gas cooler 52 81 of evaporimeter 55c and the position before the magnetic valve 82, be provided with check (non-return) valve 92, prevent direction adverse current to evaporimeter 55c.

According to said heating system, closed electromagnetic valve 551c, 84 opens magnetic valve 80, uses evaporimeter 55c as heater.If this moment, the closed electromagnetic valve 82,83, open magnetic valve 81, then obtain making the refrigerant loop of cold-producing medium without gas cooler 52.If closed electromagnetic valve 83 is opened magnetic valve 81,82, then obtain making cold-producing medium from the refrigerant loop of evaporimeter 55c via the entrance and exit of gas cooler 52.If closed electromagnetic valve 82 is opened magnetic valve 81,83, then obtain making cold-producing medium in, the refrigerant loop of 52 outlets from evaporimeter 55c to gas cooler respectively via evaporimeter 55c and gas cooler 52.If closed electromagnetic valve 81 is opened magnetic valve 82,83, when then obtaining making cold-producing medium respectively via evaporimeter 55c and gas cooler 52, the refrigerant loops of 52 inlets from evaporimeter 55c to gas cooler.If closed electromagnetic valve 81,83 is opened magnetic valve 82, then obtain making the refrigerant loop of cold-producing medium 52 inlets from evaporimeter 55c to gas cooler.If magnetic valve 81,82,83 is all opened, then obtain when making cold-producing medium the refrigerant loop of 52 entrance and exit from evaporimeter 55c to gas cooler respectively via evaporimeter 55c and gas cooler 52.

In addition, another heating system is described again.At this, use evaporimeter 55b as heater.In this case, connect according to following mode.Between the outlet of compressor 51 (51a) and evaporimeter 55b inlet, be connected via magnetic valve 85.Between the outlet of the outlet of evaporimeter 55b and Intermediate Heat Exchanger 511, be connected via magnetic valve 86.Between the inlet of the outlet of evaporimeter 55b and Intermediate Heat Exchanger 511, be connected via magnetic valve 87.Then, between compressor 51 (51a) and Intermediate Heat Exchanger 511, be provided with magnetic valve 88.Again in the outlet of evaporimeter 55b, between the set position of the branch part of the outlet of Intermediate Heat Exchanger 511 and inlet and each evaporimeter 55, be provided with magnetic valve 89.And at the inlet of evaporimeter 55b, from being provided with check (non-return) valve 93 between the position, interflow of compressor 51 (51a) and the magnetic valve 551b, prevent to magnetic valve 551b adverse current to take place.Be provided with check (non-return) valve 94 from the magnetic valve that is exported to Intermediate Heat Exchanger 511 86 of evaporimeter 55b and the position before the magnetic valve 87, preventing from adverse current to take place to evaporimeter 55b.

According to above-mentioned another heating system, closed electromagnetic valve 551b, 89 opens magnetic valve 85, uses evaporimeter 55b as heater.At this moment, if closed electromagnetic valve 87,88 is opened magnetic valve 86, then obtain making the refrigerant loop of cold-producing medium without Intermediate Heat Exchanger 511.If closed electromagnetic valve 88 is opened magnetic valve 86,87, then obtain making cold-producing medium from the refrigerant loop of evaporimeter 55b via the entrance and exit of Intermediate Heat Exchanger 511.If closed electromagnetic valve 87 is opened magnetic valve 86,88, then obtain making cold-producing medium in, from the refrigerant loop of evaporimeter 55b via Intermediate Heat Exchanger 511 outlets respectively via evaporimeter 55b and Intermediate Heat Exchanger 511.If closed electromagnetic valve 86 is opened magnetic valve 87,88, then obtain when making cold-producing medium, from the refrigerant loop of evaporimeter 55b via Intermediate Heat Exchanger 511 inlets respectively via evaporimeter 55b and Intermediate Heat Exchanger 511.If closed electromagnetic valve 86,88 is opened magnetic valve 87, then obtain making cold-producing medium from the refrigerant loop of evaporimeter 55b via Intermediate Heat Exchanger 511 inlets.If magnetic valve 86,87 and 88 is all opened, then obtain when making cold-producing medium, from the refrigerant loop of evaporimeter 55b via the entrance and exit of Intermediate Heat Exchanger 511 respectively via evaporimeter 55b and Intermediate Heat Exchanger 511.

So, even, also can access the effect that obtains by internal exchanger 56 and gas-liquid separator 54 using under the situation of evaporimeter 55 as heater.

Figure 26 is the skeleton diagram of expression another embodiment of refrigerant loop of the present invention.In Figure 26, between above-mentioned injector 53 and gas-liquid separator 54, be provided with another injector 53 '.Another injector 53 ', by reducing pressure as the high-pressure refrigerant that the gas cooler 52 of radiator is supplied with, when sucking the mix refrigerant of discharging and the high-pressure refrigerant of supplying with from gas cooler 52 mixes, the discharge of boosting of the cold-producing medium of mixing is supplied in the gas-liquid separator 54 from injector 53.

Under the situation that another injector 53 ' is not set,, also can constitute boundary to refrigerant pressure by boosting even try hard to make injector 53 to raise the efficiency by for example internal exchanger 56.On the other hand, be provided with under the situation of another injector 53 ', refrigerant pressure increased,, further improving the efficient of circulation so can alleviate the burden of compressor 51 owing to making injector 53,53 ' form multistage state.

Claims (11)

1. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein,

Has the internal exchanger that makes the high-pressure refrigerant that supplies in the described injector and low pressure refrigerant carry out heat exchange mutually.

2. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and many refrigerant circulation passage that connect by switch valve, in addition

Has the internal exchanger that makes the high-pressure refrigerant that supplies to described injector and low pressure refrigerant carry out heat exchange mutually.

3. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and many refrigerant circulation passage that connect by switch valve, in addition

The evaporimeter of regulation is connected with other evaporator series.

4. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter,

Described gas-liquid separator is made of interior pipe and outer tube, wherein, distolateral and the described injector of beginning of pipe is connected in described, be provided with through hole forming spiral helicine radially outer position, end side is connected with described compressor, and described outer tube by the distolateral covering of beginning described in the position that is provided with through hole of pipe, and form helical form with pipe in this, the end side of pipe branch is connected with described evaporimeter in described.

5. refrigerant loop as claimed in claim 4 is characterized in that:

Described gas-liquid separator is provided with trap portion, and in the end side of described outer tube, above also being sent to when making cold-producing medium temporarily below being sent to, the bottom of this trap portion is connected with tube terminal side in described below this bottom.

6. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, have by many refrigerant circulation passage that switch valve connects:

Partly regulate the nozzle group valve of refrigerant flow in the decompression of described injector;

Adjusting is to the expansion valve of the refrigerant flow of described evaporimeter supply; With

The evaporator inlet temperature sensor that detects refrigerant temperature that is provided with respectively at the entrance side place of described each evaporimeter, wherein,

Regulate the aperture of described nozzle group valve and described expansion valve, the feasible refrigerant temperature that is detected by described evaporator inlet temperature sensor within the limits prescribed.

7. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, have by many refrigerant circulation passage that switch valve connects:

Partly regulate the nozzle group valve of refrigerant flow in the decompression of described injector;

Adjusting is to the expansion valve of the refrigerant flow of described evaporimeter supply;

The evaporator inlet temperature sensor that detects refrigerant temperature that is provided with respectively at the entrance side place of described each evaporimeter; With

The evaporator outlet temperature sensor that detects refrigerant temperature that is provided with respectively at the outlet side place of described each evaporimeter, wherein,

Regulate the aperture of described nozzle group valve and described expansion valve, make the refrigerant temperature that detects by described evaporator inlet temperature sensor and the temperature difference of the refrigerant temperature that detects by described evaporator outlet temperature sensor within the limits prescribed.

8. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, have by many refrigerant circulation passage that switch valve connects:

Adjusting is to the expansion valve of the refrigerant flow of described evaporimeter supply;

Detect the high-pressure sensor of high-pressure refrigerant pressure;

Detect the low-pressure sensor of low pressure refrigerant pressure;

The outlet side place that is separately positioned on described each evaporimeter detects the evaporator outlet temperature sensor of refrigerant temperature; With

Detect the storehouse temperature sensor of the heat insulation loop border temperature inside that disposes described evaporimeter, wherein,

The refrigerant pressure that will detect by described high-pressure sensor and low-pressure sensor, the refrigerant temperature that detects by described evaporator inlet temperature sensor and the refrigerant density of calculating by the temperature that described storehouse temperature sensor detects, compare by the predefined refrigerant density setting value of refrigerant pressure that high-pressure sensor and low-pressure sensor detect with basis, regulate the aperture of described expansion valve, make described reckoning refrigerant density within the limits prescribed.

9. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein, constituting makes a plurality of described evaporimeters arranged side by side, and, in addition, have by many refrigerant circulation passage that switch valve connects:

Evaporator fan to described evaporimeter air-supply;

Detect the high-pressure sensor of high-pressure refrigerant pressure;

Detect the low-pressure sensor of low pressure refrigerant pressure;

Be separately positioned on described each evaporator outlet side place and detect the evaporator outlet temperature sensor of refrigerant temperature; With

Detect the storehouse temperature sensor of the heat insulation loop border temperature inside that disposes described evaporimeter, wherein,

The refrigerant pressure that will detect by described high-pressure sensor and low-pressure sensor, the refrigerant temperature that detects by described evaporator inlet temperature sensor and the refrigerant density of calculating by the temperature that described storehouse temperature sensor detects, compare by the predefined refrigerant density setting value of refrigerant pressure that high-pressure sensor and low-pressure sensor detect with basis, regulate the air quantity of described evaporator fan, make described reckoning refrigerant density within the limits prescribed.

10. a refrigerant loop is characterized in that, comprising:

The compressor of compressed refrigerant; Make from the radiator of the refrigerant loses heat of described compressor supply; Make the evaporimeter of cold-producing medium evaporation; By making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the low pressure refrigerant of discharging and mixing from described evaporimeter, the injector that makes the cold-producing medium of mixing boost and discharge; And will be separated into vapor phase refrigerant and liquid phase refrigerant from the mix refrigerant that described injector is supplied with, vapor phase refrigerant is turned back to described compressor, and liquid phase refrigerant is supplied to the gas-liquid separator of described evaporimeter, wherein,

Between described injector and described gas-liquid separator, be provided with another injector, by making the high-pressure refrigerant decompression of supplying with from described radiator, when sucking the mix refrigerant of discharging and mixing from described injector, to the discharge of boosting of the cold-producing medium of this mixing, and be supplied to described gas-liquid separator.

11., it is characterized in that as each described refrigerant loop in the claim 1～10:

Described cold-producing medium is a carbon dioxide.

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