CN101988772B - Absorption type refrigerator - Google Patents
Absorption type refrigerator Download PDFInfo
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- CN101988772B CN101988772B CN2010101968666A CN201010196866A CN101988772B CN 101988772 B CN101988772 B CN 101988772B CN 2010101968666 A CN2010101968666 A CN 2010101968666A CN 201010196866 A CN201010196866 A CN 201010196866A CN 101988772 B CN101988772 B CN 101988772B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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Abstract
The present invention provides an absorption type refrigerator which realizes refrigerant pump protection and can restrain temperature variation of refrigerant. An absorption type cold water and warm water dispenser (100) comprises the following components: a high-temperature regenerator (5), a low-temperature regenerator (6), a condenser (7), an evaporator (1) and an absorber (2). The invention is characterized in that the evaporator (1) is provided with the following components: a refrigerant pump (P3) which pumps the refrigerant that is stored in a refrigerant storing part (1B) in the evaporator; a refrigerant pipe (34) for connecting the refrigerant pump (P3) with a dispenser (1C) which is configured above a heat transfer pipe (14A) of the cold/hot water pipe (14); a branch pipe (35) which is branched from the refrigerant pipe (34) and is connected below the heat transfer pipe (14A); and a float valve (41) which adjusts the amount of refrigerant which circulates in the branch pipe.
Description
Technical field
The present invention relates to a kind of liquid level (level) control technology that is stored in the cold-producing medium in the evaporimeter.
Background technology
General known Absorption Refrigerator comprises: regenerator, and it heats the absorption liquid that contains cold-producing medium and makes the cold-producing medium gasification separation from absorption liquid; Condenser, it cools off the cold-producing medium that separates by described regenerator and makes its condensation; Evaporimeter, it is dispersed on the heat pipe by refrigerating medium (brine) cold-producing medium by described condenser condenses, and makes evaporation in its housing under low pressure; And absorber, it makes the cold-producing medium by described evaporator evaporation be absorbed by liquid absorption (for example referring to Patent Document 1).In this Absorption Refrigerator, possesses the refrigerated medium pump that the cold-producing medium in the refrigerant storage section that will be stored in the housing draws up, by making this refrigerated medium pump continuous running, carry out heat exchange at evaporimeter inner refrigerant and refrigerating medium, and with this refrigerating medium circulation-supplied to heat load (for example aircondition), the changes in temperature that will be produced by Absorption Refrigerator thus, and warm for room conditioning.
Patent documentation 1: Japanese kokai publication hei 03-8465 communique
But; the liquid level of the cold-producing medium in the evaporimeter has owing to former thereby more cataclysmal tendencies such as absorption liquid concentration, in existing structure, when the liquid level of the cold-producing medium in the evaporimeter descends; viewpoint from the protection refrigerated medium pump just should stop the running of this refrigerated medium pump.Therefore, refrigerated medium pump stop during owing to not carrying out the heat exchange of cold-producing medium and refrigerating medium, the refrigerant temperature change, therefore exist the temperature change that is difficult to suppress refrigerating medium and to heat load stable supply should refrigerating medium problem.
Summary of the invention
The present invention In view of the foregoing proposes, and it is a kind of in the protection refrigerated medium pump that its purpose is to provide, and can suppress the Absorption Refrigerator of refrigerant temperature change.
In order to address the above problem, Absorption Refrigerator of the present invention comprises:
Regenerator, it heats the absorption liquid that contains cold-producing medium and makes cold-producing medium gasification separation from absorption liquid;
Condenser, it cools off the cold-producing medium that separates by described regenerator and makes its condensation;
Evaporimeter, it is dispersed on the heat pipe by refrigerating medium cold-producing medium by described condenser condenses, and makes evaporation in its housing of accommodating described evaporimeter and absorber under low pressure; And
Described absorber, it is absorbed by liquid absorption the cold-producing medium by described evaporator evaporation,
It is characterized in that:
Described evaporimeter has: will be stored in refrigerated medium pump that the cold-producing medium in the refrigerant storage section in the described housing draws up, to described refrigerated medium pump and be connected refrigerant pipe that the dispenser of described heat pipe top connects, from described refrigerant pipe branch and at the bypass duct that is connected with described housing below the described heat pipe and guiding mechanism that the amount of the cold-producing medium that circulates this bypass duct is adjusted.
According to this structure, owing to having from refrigerant piping branch and at the bypass duct that is connected with housing below the heat pipe and guiding mechanism that the amount of the cold-producing medium that circulates this bypass duct is adjusted, so for example by adjusting guiding mechanism, increase so that flow through the refrigerant amount of bypass duct, thereby the evaporation of the cold-producing medium that the heat exchange that is suppressed at heat pipe causes, so the necessary above amount of the liquid level of the cold-producing medium in the device that avoids evaporating decline, can reduce cold-producing medium priming of pump stop frequency.Therefore, can suppress the temperature change of refrigerating medium and stable for should refrigerating medium to heat load.In addition, the necessary above amount because the liquid level in the evaporimeter can not descend, so need not make refrigerated medium pump force to stop, this refrigerated medium pump can adequately protect.
In addition, in this structure, can constitute described guiding mechanism and come the refrigerant flow that circulates in described bypass duct is adjusted according to the liquid level of the refrigerant storage section in the described housing.According to described structure; by flow through the refrigerant flow of bypass duct according to the liquid level adjustment of refrigerant storage section; thereby when the liquid level of cold-producing medium descends; flow through the refrigerant flow of bypass duct by increase; be suppressed at the evaporation of the cold-producing medium that the heat exchange of heat pipe causes; can reduce cold-producing medium priming of pump stop frequency (development stops the Frequency degree), therefore can be in the protection refrigerated medium pump, suppress the change of refrigerant temperature and stable for should refrigerating medium to heat load.
In addition, can constitute described guiding mechanism and possess float valve, described float valve is inaccessible when the liquid level of the cold-producing medium of described refrigerant storage section is higher than assigned position, opens when the liquid level of the cold-producing medium of described refrigerant storage section is lower than described assigned position.According to this structure, moving up and down of the float by float valve can be adjusted the flow of the cold-producing medium that flows through bypass duct, therefore can be with the liquid level of the cold-producing medium of simple structure management refrigerant storage section.
In addition, can constitute described guiding mechanism possesses: be arranged at the open and close valve of described bypass duct, the level detection sensor of liquid level that detects described refrigerant storage section and the valve control device of controlling described open and close valve according to the testing result of described level detection sensor.According to this structure, come the open and close controlling open and close valve according to the testing result of level detection sensor, thereby can adjust the refrigerant flow that flows through bypass duct, therefore can be with the liquid level of the cold-producing medium of simple structure management refrigerant storage section.
In addition, can constitute described open and close valve is the proportioning valve that can carry out to valve opening stepless adjustment, and described valve control device comes the valve opening of described proportioning valve is adjusted according to described liquid level.Therefore according to this structure, valve control device is adjusted the valve opening of this proportioning valve according to liquid level, can precision adjusts well the flow of the cold-producing medium that flows through bypass duct, can be simpler and the liquid level of the cold-producing medium of managing system cryogen reservoir more correctly.
In addition, can constitute described guiding mechanism possesses: be arranged at the open and close valve of described bypass duct, the concentration detection sensor that the concentration of the absorption liquid in the absorption liquid reservoir that is stored in described absorber is detected and the valve control device of controlling described open and close valve according to the testing result of described concentration detection sensor.According to this structure, owing to can infer from the concentration of absorption liquid the liquid level of cold-producing medium of the refrigerant storage section of evaporimeter, so not be used in the refrigerant storage section of evaporimeter the level detection sensor is set in addition, the liquid level of cold-producing medium that just can managing system cryogen reservoir.
The invention effect
According to the present invention, owing to having from refrigerant piping branch and at the bypass duct that is connected with housing below the heat pipe and guiding mechanism that the amount of the cold-producing medium that circulates this bypass duct is adjusted, so for example by adjusting guiding mechanism, increase so that flow through the refrigerant amount of bypass duct, thereby the evaporation of the cold-producing medium that the heat exchange that is suppressed at heat pipe causes, so the necessary above amount of the liquid level of the cold-producing medium in the device that avoids evaporating decline, can reduce cold-producing medium priming of pump stop frequency.Therefore, can suppress the temperature change of refrigerating medium and stable for should refrigerating medium to heat load.In addition, the necessary above amount because the liquid level in the evaporimeter can not descend, so need not make refrigerated medium pump force to stop, this refrigerated medium pump can adequately protect.
Description of drawings
Fig. 1 is the summary construction diagram of the Absorption Refrigerator of present embodiment;
Fig. 2 is the summary construction diagram of the Absorption Refrigerator of other embodiments;
Fig. 3 is the figure of the relation of the liquid level in the evaporimeter and proportioning valve aperture in these other embodiments of expression;
Fig. 4 is the summary construction diagram of the Absorption Refrigerator of other other embodiments;
Fig. 5 is the figure of the relation of the rare absorption liquid concentration in the absorption liquid and proportioning valve aperture in this other embodiment of expression.
Among the figure:
The 1-evaporimeter
1B-refrigerant liquid reservoir
The 2-absorber
3-evaporimeter muffler body (housing)
5-high-temp regenerator (regenerator)
6-low-temperature regenerator (regenerator)
The 7-condenser
The rare absorption liquid pump of P1-
P2-concentrated absorption solution pump
The P3-refrigerated medium pump
14-cold/hot water pipe
The 14A-heat pipe
The 34-refrigerant pipe
35-branched pipe (bypass duct)
The 40-solution control valve
41-float valve (guiding mechanism)
The 41A-float
42-proportioning valve (guiding mechanism)
43-level detection sensor
The 45-concentration detection sensor
50-control device (valve control device, guiding mechanism)
The absorption changes in temperature water of 100-machine (Absorption Refrigerator)
The absorption changes in temperature water of 200-machine (Absorption Refrigerator)
The absorption changes in temperature water of 300-machine (Absorption Refrigerator)
The specific embodiment
Below, one embodiment of the present invention is described with reference to the accompanying drawings.
Fig. 1 is the summary construction diagram of the absorption changes in temperature water machine (absorption refrigerating machine) 100 of present embodiment.Absorption changes in temperature water machine 100 is that cold-producing medium makes water, absorption liquid use the absorption changes in temperature water machine of the double utility type of lithium bromide (LiBr) aqueous solution.
Absorption changes in temperature water machine 100 comprises: evaporimeter 1 as shown in Figure 1, the absorber 2 that is arranged in parallel with this evaporimeter 1, accommodate the evaporimeter muffler body (housing) 3 of described evaporimeter 1 and absorber 2, high-temp regenerator (regenerator) 5 with gas burner 4, low-temperature regenerator (regenerator) 6, the condenser 7 that is arranged in parallel with this low-temperature regenerator 6, accommodate the low-temperature regenerator condensation body 8 of described low-temperature regenerator 6 and condenser 7, low temperature heat exchanger 12, high-temperature heat exchanger 13, cold-producing medium discharge opeing (drain) heat exchanger 16, rare absorption liquid pump P1, concentrated absorption solution pump P2 and refrigerated medium pump P3.Described each equipment is connected by pipe arrangement by absorption liquid pipe 21～25 and refrigerant pipe 31～36 etc.
In addition, symbol 14 expression cold/hot water pipes, its refrigerating medium circulation-supplied that is used for having carried out heat exchange with cold-producing medium evaporimeter 1 in is to not shown heat load (for example aircondition), and the heat pipe 14A that forms in the part of this cold/hot water pipe 14 is configured in the evaporimeter 1.Symbol 15 expression is used for cooling water is circulated in turn to the cooling water pipe of absorber 2 and condenser 7, and each heat pipe 15A, 15B of forming in the part of this cooling water pipe 15 are configured in respectively in absorber 2 and the condenser 7.The control device that symbol 50 expressions are controlled absorption changes in temperature water machine 100 integral body.
Rare absorption liquid pipe 21 branches into first rare absorption liquid pipe 21A and second rare absorption liquid pipe 21B in the downstream of rare absorption liquid pump P1 and solution control valve 40, first rare absorption liquid pipe 21A via cold-producing medium discharge opeing heat exchanger 16 and second rare absorption liquid pipe 21B via low temperature heat exchanger 12 after again the interflow.And the other end of rare absorption liquid pipe 21 is rear at the 5B of gas-bearing formation section opening via high-temperature heat exchanger 13, and the described gas-bearing formation 5B of section is formed in the high-temp regenerator 5 and is located at the top of the heat exchange department 5A of high-temp regenerator 5 interior formation.
High-temp regenerator 5 is parts of coming the absorption liquid that is stored in heat exchange department 5A is carried out thermal regeneration take the flame of gas burner 4 as thermal source, is formed with the intermediate absorption fluid reservoir 5C that is stored by the intermediate absorption fluid of this heat exchange department 5A thermal regeneration in the side of heat exchange department 5A.Be provided with the liquid level sensor 52 that the liquid level to the absorption liquid that is stored in intermediate absorption fluid reservoir 5C (in the high-temp regenerator 5) detects at this intermediate absorption fluid reservoir 5C.
The lower end of intermediate absorption fluid reservoir 5C is connected with an end of intermediate absorption fluid pipe 22, and the other end of this intermediate absorption fluid pipe 22 is by the 6A of the gas-bearing formation section opening on the top of high-temperature heat exchanger 13 in being formed at low-temperature regenerator 6.High-temperature heat exchanger 13 is warm parts of coming the absorption liquid of flow rare absorption liquid pipe 21 to heat of utilizing the absorption liquid of the high temperature that flows out from middle absorption liquid reservoir 5C, thereby realizes the reduction of the Fuel Consumption of gas burner 4 in the high-temp regenerator 5.In addition, high-temperature heat exchanger 13 upstream sides of intermediate absorption fluid pipe 22 are connected by absorption liquid pipe 23 with absorber 2, have open and close valve V1 on high-temperature heat exchanger 13 upstream sides of intermediate absorption fluid pipe 22 and the absorption liquid pipe 23 between the absorber 2.
Low-temperature regenerator 6 is as thermal source with the refrigerant vapour that separated by high-temp regenerator 5, come to carry out being stored in absorption liquid among the absorption liquid reservoir 6B that is formed at the 6A of gas-bearing formation section below the part of thermal regeneration, 6B disposes heat pipe 31A in the absorption liquid reservoir, and heat pipe 31A is formed on the part of the refrigerant pipe 31 that extends to the bottom of condenser 7 from the upper end of high-temp regenerator 5.By refrigerant vapour is circulated in this refrigerant pipe 31, by above-mentioned heat pipe 31A, the warm absorption liquid that is stored in absorption liquid reservoir 6B that is delivered to of refrigerant vapour, this absorption liquid further is concentrated.
The absorption liquid reservoir 6B of low-temperature regenerator 6 is connected with an end of concentrated absorption solution pipe 24, and the other end of this concentrated absorption solution pipe 24 is connected with dope dispenser 2C in the gas-bearing formation section 2B top setting of absorber 2 by concentrated absorption solution pump P2 and low temperature heat exchanger 12.Low temperature heat exchanger 12 is that utilization is from the warm next part that the rare absorption liquid that flows through second rare absorption liquid pipe 21B is heated of the concentrated absorption solution of the absorption liquid reservoir 6B outflow of low-temperature regenerator 6.In addition, upstream side at concentrated absorption solution pump P2 is provided with bypass duct 25, bypass duct 25 is walked around (バ イ パ ス The Ru) this concentrated absorption solution pump P2 and low temperature heat exchanger 12, when the running of concentrated absorption solution pump P2 stopped, the absorption liquid that flows out from the absorption liquid reservoir 6B of low-temperature regenerator 6 was not supplied in the absorber 2 via low temperature heat exchanger 12 by bypass duct 25.
As above-mentioned, the bottom that the 5B of gas-bearing formation section of high-temp regenerator 5 is connected with condenser connects by refrigerant pipe 31, wherein refrigerant pipe 31 is via heat pipe 31A and cold-producing medium discharge opeing heat exchanger 16 at the absorption liquid reservoir 6B of low-temperature regenerator 6 pipe arrangement, the 2B of gas-bearing formation section that the heat pipe 31A upstream side of this refrigerant pipe 31 is connected with absorber is connected by refrigerant pipe 32, and the refrigerant pipe 32 between the 2B of gas-bearing formation section of the heat pipe 31A upstream side of this refrigerant pipe 31 and absorber 2 has open and close valve V2.In addition, the 1A of gas-bearing formation section of being connected with evaporimeter in the bottom of condenser 7 is connected by refrigerant pipe 33, and the refrigerant pipe 33 between the 1A of gas-bearing formation section of the bottom of condenser 7 and evaporimeter 1 has U-shaped sealing 33A.In addition, below evaporimeter 1, be formed with refrigerant liquid reservoir (refrigerant storage section) 1B of the refrigerant storage that has liquefied, the stroll device 1C on this refrigerant liquid reservoir 1B and the gas-bearing formation section 1A top that is connected evaporimeter 1 is connected by refrigerant pipe 34, and this refrigerant liquid reservoir 1B and the refrigerant pipe 34 that is configured between the stroll device 1C on gas-bearing formation section 1A top of evaporimeter 1 have refrigerated medium pump P3.In addition, the outlet side of the heat pipe 14A that the heat pipe 15B outlet side of cooling water pipe 15 is connected with the cold/hot water pipe is connected by refrigerant pipe 36, and the refrigerant pipe 36 between the outlet side of the heat pipe 15B outlet side of cooling water pipe 15 and the heat pipe 14A of cold/hot water pipe 14 has open and close valve V3.
Absorption changes in temperature water machine 100 is carried out the cooling operation that takes out cold water from cold/hot water pipe 14 by the control of control device 50.When cooling operation, drop into the heat of absorption changes in temperature water machine 100 by control device 50 controls, so that reach the design temperature of regulation, for example reach 7 ℃ for the evaporimeter 1 outlet side temperature of the refrigerating medium (for example cold water) of not shown heat load by cold/hot water pipe 14 circulation-supplied.Specifically, control device 50 closeall open and close valve V1～V3 make all pump P1～P3 starting, and make gas combustion in burners 4, and the firepower of control gas burner 4 is so that the temperature of the refrigerating medium that temperature sensor S1 measures reaches 7 ℃ of regulation.
Heated by the burning gases of the flame of gas burner 4 and high temperature at this high-temp regenerator 5 by the rare absorption liquid of conveyance to high-temp regenerator 5 by rare absorption liquid pump P1 through rare absorption liquid pipe 21 from absorber 2, therefore, the cold-producing medium evaporation in this rare absorption liquid separates.Separate in high-temp regenerator 5 cold-producing mediums evaporations, the intermediate absorption fluid that concentration has risen is sent to low-temperature regenerator 6 via high-temperature heat exchanger 13.In this low-temperature regenerator 6, utilization is heated intermediate absorption fluid from high-temp regenerator 5 through the refrigerant vapour that refrigerant pipe 31 was supplied and flowed into the high temperature of heat pipe 31A, cold-producing medium further separates, it is higher that concentration becomes, this concentrated absorption solution is sent to absorber 2 via concentrated absorption solution pump P2 and low temperature heat exchanger 12, and scatters from the top of dope dispenser 2C.
On the other hand, the cold-producing medium by low-temperature regenerator 6 separation regeneration enters condenser 7 and condensation.Then, the refrigerant liquid that generates at condenser 7 enters evaporimeter 1 via refrigerant pipe 33, is raised liquid (Yang liquid さ れ Ru by the running of refrigerated medium pump P3), spread to from dispenser 1C on the heat pipe 14A of cold/hot water pipe 14.
Spreading to refrigerant liquid on the heat pipe 14A obtains heat of vaporization from the refrigerating medium of the inside by heat pipe 14A and evaporates, therefore, the refrigerating medium of the inside by heat pipe 14A is cooled, and the refrigerating medium of drop in temperature is supplied to heat load from cold/hot water pipe 14 like this, the cooling running such as freeze.
Then, repeat following circulation: enter absorber 2 at evaporimeter 1 vaporized cold-producing medium, and by the concentrated absorption solution absorption of being supplied by low-temperature regenerator 6 and scattering from the top, be stored in rare absorption liquid reservoir 2A of absorber 2, arrive high-temp regenerator 5 by rare absorption liquid pump P1 conveyance.And the heat that produces during absorption liquid absorption refrigeration agent is configured in the heat pipe 15A cooling of the cooling water pipe 15 in the absorber 2.
But, as mentioned above, when the cooling operation of absorption changes in temperature water machine 100, the refrigerant liquid that is stored in the refrigerant liquid reservoir 1B of evaporimeter 1 is drawn up and is spread to from dispenser 1C on the heat pipe 14A of cold/hot water pipe 14 by the running of refrigerated medium pump P3.This spreads to refrigerant liquid on the heat pipe 14A and obtains heat of vaporization from the refrigerating medium of the inside by heat pipe 14A and evaporate, and thus, the refrigerating medium of the inside by heat pipe 14A is cooled.
On the other hand, the liquid level of the refrigerant liquid reservoir 1B in the evaporimeter 1 for example can reduce along with the decline of the temperature of cooling water, has the more cataclysmal tendency of impact that upsets because of the outside like this.Therefore; if when the liquid level of cold-producing medium descends; from the viewpoint of protection refrigerated medium pump P3 refrigerated medium pump P3 is shut down; then at refrigerated medium pump P3 stopping period; do not carry out the heat exchange of cold-producing medium and refrigerating medium; therefore the refrigerant temperature change, is difficult to suppress refrigerant temperature change and stablize to heat load supply refrigerating medium.
In the present embodiment, evaporimeter 1 comprises from refrigerant pipe 34 at the branched pipe (bypass duct) 35 of branch between refrigerated medium pump P3 and the dispenser 1C and to the float valve (guiding mechanism) 41 adjusted of refrigerant flow of circulation this branched pipe 35.
Thus, because the refrigerant amount that scatters from dispenser 1C reduces relatively, so the evaporation of the cold-producing medium that the heat exchange at the heat pipe 14A place of cold/hot water pipe 14 causes is suppressed, the liquid level H of the refrigerant liquid reservoir 1B in the device 1 that the avoids evaporating necessary above amount that descends.Therefore, the starting stop frequency (development stops the Frequency degree) of refrigerated medium pump P3 irreducible minimum can be suppressed at, the change of refrigerant temperature can be suppressed and stable for should refrigerating medium to heat load.In addition, the necessary above amount because the liquid level H of the refrigerant liquid reservoir 1B in the evaporimeter 1 can not descend, so need not force to make refrigerated medium pump P3 to stop, this refrigerated medium pump P3 can adequately protect.
At this moment, the refrigerant amount that scatters from dispenser 1C reduces, and is supplied to thus the temperature of the refrigerating medium of heat load that the tendency of rising is arranged, but that its ascending amount is compared when stopping with refrigerated medium pump P3 is very little, for example is the degree that can not hinder cooling operation.
On the other hand, when the liquid level H of refrigerant liquid reservoir 1B rises, because valve body is inaccessible, reduce so flow through the refrigerant flow of branched pipe 35.Thus, the refrigerant amount that scatters from dispenser 1C increases relatively, and therefore, the evaporation of the cold-producing medium that the heat exchange of promotion at the heat pipe 14A place of cold/hot water pipe 14 causes can stably be supplied to heat load with the refrigerating medium of abundant chilled temperature.
In addition, according to present embodiment, owing to the float 41A of float valve 41 moves up and down corresponding to the liquid level H of refrigerant liquid reservoir 1B, can adjust the refrigerant flow that flows through branched pipe 35, therefore can be with the liquid level of the cold-producing medium of simple structure management refrigerant storage section.
Next other embodiment is described.
Fig. 2 is the summary construction diagram of the absorption changes in temperature water machine (absorption refrigerating machine) 200 of other embodiments.This absorption changes in temperature water machine 200 is with above-mentioned absorption changes in temperature water machine 100 difference structurally: absorption changes in temperature water machine 200 comprises proportioning valve 42, and it is arranged at from refrigerant pipe 34 on the branched pipe (bypass duct) 35 of branch between refrigerated medium pump P3 and the dispenser 1C; Level detection sensor 43, its liquid level to the refrigerant liquid reservoir 1B in the evaporimeter 1 detects; And control device (valve control device) 50, its testing result according to this level detection sensor 43 is come the aperture of resize ratio valve 42.Other structures of absorption changes in temperature water machine 200 are identical with absorption changes in temperature water machine 100, and description thereof is omitted therefore to mark same-sign.In addition, in these other embodiments, possess proportioning valve 42 and level detection sensor 43 and control device 50 and the formation guiding mechanism.
Proportioning valve 42 is motor-driven valves, constitutes to carry out stepless adjustment to valve opening, and moves under the control of control device 50.Level detection sensor 43 for example is the sensor that magneto strictive sensor like that can stepless measurement liquid level, and its testing result is exported to control device 50.
At this, the liquid level of the benchmark when so-called liquid level 100% refers to usually turn round, so-called liquid level 20% refer to the height that start at the bottom surface from refrigerant liquid reservoir 1B for this altitude datum.
According to these other embodiment, when the liquid level that detects when level detection sensor 43 descends, control device 50 is according to the valve opening of this liquid level exaggerated scale valve 42, therefore in branched pipe 35 circulations and turn back to refrigerant flow increase evaporimeter 1 in.
Thus, owing to relatively reducing from the refrigerant amount of dispenser 1C spreading, therefore, the evaporation of the cold-producing medium that the heat exchange at the heat pipe 14A place of cold/hot water pipe 14 causes is suppressed, the liquid level H of the refrigerant liquid reservoir 1B in the device 1 that the avoids evaporating necessary above amount that descends.Therefore, the starting stop frequency of refrigerated medium pump P3 can be suppressed at irreducible minimum, can suppress the change of refrigerant temperature and stably supply to heat load should refrigerating medium.In addition, the necessary above amount because the liquid level H of the refrigerant liquid reservoir 1B in the evaporimeter 1 can not descend, so need not force to make refrigerated medium pump P3 to stop, this refrigerated medium pump P3 can adequately protect.
At this moment, the refrigerant amount that scatters from dispenser 1C reduces, and is supplied to thus the temperature of the refrigerating medium of heat load that the tendency of rising is arranged, but that its ascending amount is compared when stopping with refrigerated medium pump P3 is very little, for example is the degree that can not hinder cooling operation.
On the other hand, when the liquid level H of refrigerant liquid reservoir 1B rises, because valve body is inaccessible, reduce so flow through the refrigerant flow of branched pipe 35.Thus, the refrigerant amount that scatters from dispenser 1C increases relatively, and therefore, the evaporation of the cold-producing medium that the heat exchange of promotion at the heat pipe 14A place of cold/hot water pipe 14 causes can stably be supplied to heat load with the refrigerating medium of abundant chilled temperature.
In addition, according to these other embodiments, because control device 50 is adjusted the valve opening of this proportioning valve 42 according to liquid level, so can precision adjust well the refrigerant flow that flows through branched pipe 35, can simpler and more correctly manage the liquid level of the cold-producing medium of refrigerant liquid reservoir 1B.
And, in these other embodiments, the structure of allocation ratio valve 42 on branched pipe 35 has been described, but has been not limited to this, can also be the structure that the open and close valve that makes branched pipe 35 switchings is set.In this structure, although compare with proportioning valve 42, the management of liquid level becomes miscellaneous,, by the control opening/closing time, can manage with low cost the liquid level of the cold-producing medium of refrigerant liquid reservoir 1B.
The following describes other embodiment.
Fig. 4 is the summary construction diagram of the absorption changes in temperature water machine (absorption refrigerating machine) 300 of other embodiments.This absorption changes in temperature water machine 300 is with above-mentioned absorption changes in temperature water machine 100 difference structurally: this absorption changes in temperature water machine 300 comprises proportioning valve 42, and it is arranged at from refrigerant pipe 34 on the branched pipe (bypass duct) 35 of branch between refrigerated medium pump P3 and the dispenser 1C; Concentration detection sensor 45, it detects rare absorption liquid concentration of storing among the rare absorption liquid reservoir 2A in absorber 2; And control device (valve control device) 50, its testing result according to this concentration detection sensor is come the aperture of resize ratio valve 42.Other structures of absorption changes in temperature water machine 300 are identical with absorption changes in temperature water machine 100, and description thereof is omitted therefore to mark same-sign.In addition, in these other embodiments, possess proportioning valve 42 and concentration detection sensor 45 and control device 50 and the formation guiding mechanism.
Concentration detection sensor 45 is the sensors that can carry out to the lithium bromide concentration in the absorption liquid stepless detection, and its testing result is exported to control device 50.
At this, as mentioned above, in absorber 2, because the refrigerant vapour in evaporimeter 1 evaporation is absorbed in the absorption liquid, so absorption refrigeration agent steam and rare absorption liquid of being diluted is stored in rare absorption liquid reservoir 2A of absorber 2.In addition, in absorption changes in temperature water machine, owing to the path of refrigerant circulation is sealed, so the refrigerant amount that circulates in this path is certain.
Therefore, be stored in the concentration of the rare absorption liquid among rare absorption liquid reservoir 2A by measurement, just can infer the liquid level H of cold-producing medium of the refrigerant liquid reservoir 1B of evaporimeter 1.That is, infer that when rare absorption liquid concentration reduced, absorption liquid absorbed a large amount of cold-producing mediums, so the liquid level H of refrigerant liquid reservoir 1B reduces.In addition, when rare absorption liquid concentration uprised, the refrigerant amount that absorption liquid absorbs reduced, so the liquid level H of refrigerant liquid reservoir 1B rises.The relation of the liquid level H of rare absorption liquid concentration and refrigerant liquid reservoir 1B is tried to achieve by experiment, in this structure, utilizes the liquid level H of this relation management refrigerant liquid reservoir 1B.
Specifically, the cold-producing medium loading that is filled in the absorption liquid loading in the absorber 2 and is filled in the evaporimeter 1 is known value, the pre-filled volume of described absorption liquid and cold-producing medium is designed to: when absorption liquid was design running concentration (for example 57%), the liquid level H of the refrigerant liquid reservoir 1B of evaporimeter 1 was the value of β (100%).Therefore, as long as know the concentration of absorption liquid, just know that calculating how many cold-producing mediums is absorbed by liquid absorption, also remain how many cold-producing mediums after therefore just can inferring according to the volume (known) of the refrigerant liquid reservoir 1B of evaporimeter 1, namely just can infer the liquid level H of refrigerant liquid reservoir 1B.
According to these other embodiments, when the rare absorption liquid concentration that detects when concentration detection sensor 45 reduces, control device 50 infers that the liquid level H of refrigerant liquid reservoir 1B descends, therefore, come the valve opening of exaggerated scale valve 42 by this rare absorption liquid concentration of basis, thereby the refrigerant flow that flows through branched pipe 35 and turn back in the evaporimeter 1 is increased.
Thus, because the refrigerant amount that scatters from dispenser 1C reduces relatively, so the evaporation of the cold-producing medium that the heat exchange at the heat pipe 14A place of cold/hot water pipe 14 causes is suppressed, the liquid level H of the refrigerant liquid reservoir 1B in the device 1 that the avoids evaporating necessary above amount that descends.Therefore, the starting stop frequency (development stops the Frequency degree) of refrigerated medium pump P3 irreducible minimum can be suppressed at, the change of refrigerant temperature can be suppressed and stable for should refrigerating medium to heat load.In addition, the necessary above amount because the liquid level H of the refrigerant liquid reservoir 1B in the evaporimeter 1 can not descend, so need not force to make refrigerated medium pump P3 to stop, this refrigerated medium pump P3 can adequately protect.
At this moment, the refrigerant amount that scatters from dispenser 1C reduces, and is supplied to thus the temperature of the refrigerating medium of heat load that the tendency of rising is arranged, but that its ascensional range is compared when stopping with refrigerated medium pump P3 is very little, for example is the degree that can not hinder cooling operation.
On the other hand, when the rare absorption liquid concentration that detects when concentration detection sensor 45 rises, control device 50 infers that the liquid level H of refrigerant liquid reservoir 1B rises, therefore, come the valve opening of reduce in scale valve 42 by this rare absorption liquid concentration of basis, thereby the refrigerant flow that flows through branched pipe 35 and turn back in the evaporimeter 1 is reduced.Thus, the refrigerant amount that scatters from dispenser 1C increases relatively, therefore promotes the evaporation of the cold-producing medium that the heat exchange at the heat pipe 14A place of cold/hot water pipe 14 causes, the refrigerating medium of abundant chilled temperature stably can be supplied to heat load.
In addition, according to these other embodiments, because control device 50 is adjusted the valve opening of this proportioning valve 42 according to rare absorption liquid concentration, so can precision adjust well the refrigerant flow that flows through branched pipe 35, can simpler and more correctly manage the liquid level of the cold-producing medium of refrigerant liquid reservoir 1B.
And, in these other embodiments, the structure of allocation ratio valve 42 on branched pipe 35 has been described, but has been not limited to this, can also be the structure that the open and close valve that makes branched pipe 35 switchings is set.In this structure, although compare with proportioning valve 42, the management of liquid level becomes miscellaneous,, by the control opening/closing time, can manage with low cost the liquid level of the cold-producing medium of refrigerant liquid reservoir 1B.
In addition, in these other embodiments, adopt concentration detection sensor 45 to detect rare absorption liquid concentration as concentration detecting mechanism, but be not limited to this, refrigerant temperature sensors and thin liquid temperature sensor (diagram is omitted) for example can be set respectively on the absorption liquid reservoir 2B of the refrigerant liquid reservoir 1B of evaporimeter 1 and absorber 2, according to each refrigerant temperature and the rare absorption liquid temperature that these temperature sensors detect, calculate rare absorption liquid concentration.
Specifically, the physics value of absorption liquid (the LiBr aqueous solution) is also made its approximate expression by vague generalization.Can think that the rare absorption liquid in the absorber 2 is saturation state, the function that this rare absorption liquid concentration is pressure and temperature.Pressure is absorber 2 internal pressures=evaporimeter 1 internal pressure=refrigerant saturation pressure P.At this, refrigerant saturation pressure P can obtain from refrigerant temperature, as long as the pressure that therefore will obtain from this refrigerant temperature and the concentration of rare absorption liquid temperature substitution LiBr aqueous solution are calculated approximate expression, just can calculate rare absorption liquid concentration.
According to this structure, by distinguishing the such simple structure of set temperature sensor at refrigerant liquid reservoir 1B and absorption liquid reservoir 2B, just can detect rare absorption liquid concentration, therefore compare with the situation that concentration detection sensor is set, can form simple structure with low cost.
Above-mentioned embodiment shows applicable a kind of mode of the present invention, but the invention is not restricted to above-mentioned embodiment.For example, in the above-described embodiment, although absorption changes in temperature water machine is the double utility type, certainly can also be applied in the evaporimeter with absorption changes in temperature water machines headed by the substance effectiveness type, substance double utility type and triple effectiveness types and absorption heat pump unit.
Claims (6)
1. Absorption Refrigerator, it possesses:
Regenerator, it heats the absorption liquid that contains cold-producing medium and makes cold-producing medium gasification separation from absorption liquid;
Condenser, it cools off the cold-producing medium that separates by described regenerator and makes its condensation;
Evaporimeter, it is dispersed on the heat pipe by refrigerating medium cold-producing medium by described condenser condenses, and makes evaporation in its housing of accommodating described evaporimeter and absorber under low pressure; And
Described absorber, it is absorbed by liquid absorption the cold-producing medium by described evaporator evaporation,
It is characterized in that:
Described evaporimeter has: will be stored in refrigerated medium pump that the cold-producing medium in the refrigerant storage section in the described housing draws up, to described refrigerated medium pump and be connected refrigerant pipe that the dispenser of described heat pipe top connects, from described refrigerant pipe branch and at the bypass duct that is connected with described housing below the described heat pipe and guiding mechanism that the amount of the cold-producing medium that circulates this bypass duct is adjusted.
2. Absorption Refrigerator as claimed in claim 1 is characterized in that,
Described guiding mechanism comes the refrigerant flow that circulates in described bypass duct is adjusted according to the liquid level of the refrigerant storage section in the described housing.
3. Absorption Refrigerator as claimed in claim 1 or 2 is characterized in that,
Described guiding mechanism possesses float valve, and described float valve is inaccessible when the liquid level of the cold-producing medium of described refrigerant storage section is higher than assigned position, opens when the liquid level of the cold-producing medium of described refrigerant storage section is lower than described assigned position.
4. Absorption Refrigerator as claimed in claim 1 or 2 is characterized in that,
Described guiding mechanism possesses: be arranged at the open and close valve of described bypass duct, the level detection sensor of liquid level that detects described refrigerant storage section and the valve control device of controlling described open and close valve according to the testing result of described level detection sensor.
5. Absorption Refrigerator as claimed in claim 4 is characterized in that,
Described open and close valve is the proportioning valve that can carry out to valve opening stepless adjustment, and described valve control device comes the valve opening of described proportioning valve is adjusted according to described liquid level.
6. Absorption Refrigerator as claimed in claim 1 is characterized in that,
Described guiding mechanism possesses: be arranged at the open and close valve of described bypass duct, the concentration detection sensor that the concentration of the absorption liquid in the absorption liquid reservoir that is stored in described absorber is detected and the valve control device of controlling described open and close valve according to the testing result of described concentration detection sensor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009179298A JP2011033261A (en) | 2009-07-31 | 2009-07-31 | Absorption type refrigerating machine |
| JP2009-179298 | 2009-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101988772A CN101988772A (en) | 2011-03-23 |
| CN101988772B true CN101988772B (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101968666A Expired - Fee Related CN101988772B (en) | 2009-07-31 | 2010-06-02 | Absorption type refrigerator |
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| Country | Link |
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| JP (1) | JP2011033261A (en) |
| CN (1) | CN101988772B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7209324B2 (en) * | 2018-04-24 | 2023-01-20 | パナソニックＩｐマネジメント株式会社 | absorption chiller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3445941B2 (en) * | 1998-12-17 | 2003-09-16 | 株式会社 日立インダストリイズ | Multi-stage evaporative absorption type absorption chiller / heater and large temperature difference air conditioning system equipped with the same |
| CN2937957Y (en) * | 2005-08-20 | 2007-08-22 | 李汉清 | High efficient refrigeration device and complete energy saving attachment for the device |
| KR100841655B1 (en) * | 2007-09-18 | 2008-06-26 | 주식회사신우이엔지 | Chiller heater with refining apparatus of absorption liquids |
| JP5018627B2 (en) * | 2008-05-08 | 2012-09-05 | 株式会社デンソー | Vehicle status display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0518627A (en) * | 1991-07-09 | 1993-01-26 | Hitachi Ltd | Absorption type cold and hot water apparatus |
-
2009
- 2009-07-31 JP JP2009179298A patent/JP2011033261A/en active Pending
-
2010
- 2010-06-02 CN CN2010101968666A patent/CN101988772B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3445941B2 (en) * | 1998-12-17 | 2003-09-16 | 株式会社 日立インダストリイズ | Multi-stage evaporative absorption type absorption chiller / heater and large temperature difference air conditioning system equipped with the same |
| CN2937957Y (en) * | 2005-08-20 | 2007-08-22 | 李汉清 | High efficient refrigeration device and complete energy saving attachment for the device |
| KR100841655B1 (en) * | 2007-09-18 | 2008-06-26 | 주식회사신우이엔지 | Chiller heater with refining apparatus of absorption liquids |
| JP5018627B2 (en) * | 2008-05-08 | 2012-09-05 | 株式会社デンソー | Vehicle status display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011033261A (en) | 2011-02-17 |
| CN101988772A (en) | 2011-03-23 |
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