CN107356011B - Adsorption refrigeration system - Google Patents
Adsorption refrigeration system Download PDFInfo
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- CN107356011B CN107356011B CN201710696686.6A CN201710696686A CN107356011B CN 107356011 B CN107356011 B CN 107356011B CN 201710696686 A CN201710696686 A CN 201710696686A CN 107356011 B CN107356011 B CN 107356011B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B17/00—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type
- F25B17/02—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a liquid, e.g. brine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
- F25B49/046—Operating intermittently
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/13—Pump speed control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
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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]
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses an adsorption refrigeration system, comprising: the refrigeration box comprises a box body used for containing a refrigerant, an adsorption bed, a condenser and an evaporator, wherein the adsorption bed is arranged on one side in the box body, the condenser and the evaporator are arranged on the other side in the box body, and the condenser is arranged on the upper part of the box body; a first water tank for providing hot water to the adsorbent bed; a second water tank for providing cold water to the adsorbent bed and the condenser; and the third water tank is communicated with the evaporator and is used for providing low temperature for the outside. The evaporation and condensation processes of the refrigerant are carried out in the box body, and the adsorption bed, the condenser and the evaporator can finish the transmission work of the refrigerant among the three parts without pipeline connection, so that the refrigerant has good air tightness, simultaneously, the structure of the system is simplified, and the processing and manufacturing cost is reduced.
Description
Technical Field
The invention belongs to the technical field of adsorption refrigeration, and particularly relates to an adsorption refrigeration system.
Background
The government in China has expressed that by 2020, the total domestic production value of carbon dioxide emissions (carbon emission intensity) of units in China is remarkably reduced compared with 2005. According to the national energy 'thirteen five' program, the Chinese non-fossil energy ratio is increased from 12% in 2015 to 15% in 2020 by 3 percentage points. Meanwhile, the energy consumption of the GDP unit in the thirteen-five period is reduced by 15 percent. Therefore, how to effectively utilize non-fossil energy and increase energy consumption in industry has become a key technology that must be mastered to achieve the thirteen-five goals. Among them, adsorption refrigeration technology is a low-grade energy utilization technology considered to be very potential. The adsorption refrigeration can be driven by solar energy or low-grade industrial waste heat, and the used refrigerant is water or ammonia and other mediums, so that the problem of greenhouse gas emission is avoided. However, the adsorption refrigeration technology at the present stage still has the following technical problems: 1) The adsorption refrigeration system has a complex structure, so that the cost and the occupied space area of the system are large, and the further popularization of the system is influenced; 2) The air tightness of the adsorption refrigeration system is poor, so that the vacuum degree of the system is insufficient, and the performance of the system is seriously reduced; 3) The external pipeline of the adsorption refrigeration system is complex, cold water and hot water are mutually intersected, and the installation and maintenance are difficult, so that the installation and maintenance cost of the system is high, and the further popularization of the system is influenced.
At present, the core components of the existing adsorption refrigeration system comprise an adsorption bed, an evaporator and a condenser, the three main components are generally installed in different boxes respectively, the boxes are connected through butterfly valves and the like, and the on-off and pressure among the evaporator, the condenser and the adsorption bed are controlled by controlling the on-off states of the different butterfly valves so as to ensure the normal operation of the adsorption refrigeration system. The structure causes the defects of poor air tightness, complex system structure, high processing and manufacturing cost, large volume and the like of the traditional adsorption refrigeration system.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an adsorption refrigeration system which is simple in connection mode and convenient to operate.
In order to achieve the above purpose, the invention is realized according to the following technical scheme:
an adsorption refrigeration system comprising:
the refrigeration box comprises a box body used for containing a refrigerant, an adsorption bed, a condenser and an evaporator, wherein the adsorption bed is arranged on one side in the box body, the condenser and the evaporator are arranged on the other side in the box body, and the condenser is arranged on the upper part of the box body;
a first water tank for providing hot water to the adsorbent bed;
a second water tank for providing cold water to the adsorbent bed and the condenser;
and the third water tank is communicated with the evaporator and is used for providing low temperature for the outside.
Further, the refrigeration box further comprises a heat insulation plate, and the heat insulation plate is arranged between the adsorption bed and the evaporator.
Further, the heat insulation plate and the side wall of the box body enclose a water tank for containing liquid-state refrigerant, and the evaporator is arranged in the water tank.
Further, a vent hole is arranged on the heat insulating plate at a position corresponding to the condenser, and the height of the lowest position of the vent hole exceeds the bottom of the condenser.
Further, the refrigerator comprises two refrigeration boxes, namely a first refrigeration box and a second refrigeration box;
the adsorption bed of each refrigeration box is respectively and selectively communicated with the first water tank or the second water tank in a circulating way through a plurality of pipelines;
the condenser of each refrigeration box is selectively communicated with the second water tank in a circulating way through a plurality of pipelines;
the evaporator of each refrigeration tank is selectively in cyclical communication with the third water tank through a plurality of lines.
Further, the water tank of the first refrigeration box is communicated with the water tank of the second refrigeration box through a first pipeline so as to exchange the refrigerants in the two water tanks; the first pipeline is provided with a throttle valve.
Further, a connecting part used for being connected with the first pipeline is arranged in the water tank of each refrigeration box, and two ends of the first pipeline are respectively communicated with the corresponding connecting parts;
the connecting part is a hollow pipe, one end of the connecting part is communicated with the first pipeline, the other end of the connecting part is closed, and the side wall of the connecting part is provided with a plurality of branch pipes with different inner diameters.
Further, the adsorption beds of the first refrigeration tank and the second refrigeration tank are in circulated communication through a pipeline to exchange water in the two adsorption beds.
Further, the device also comprises a controller, a plurality of water pumps and electromagnetic valves which are arranged on the pipelines, wherein the controller controls the start and stop of the water pumps and the on and off of the electromagnetic valves so as to realize the exchange of refrigerants between the two water tanks, the exchange of water between the two adsorption beds and the alternate adsorption and desorption processes of the two refrigeration boxes;
the water pump control system further comprises a plurality of temperature sensors used for sending temperature signals to the controller and a plurality of pressure sensors used for sending pressure signals to the controller, and when the temperature signals or the pressure signals exceed a threshold value, the controller makes judgment and controls the start and stop of the water pump and the on-off of the electromagnetic valve.
Further, the outer wall of the box body is coated with heat preservation cotton.
Compared with the prior art, the invention has the beneficial effects that:
the evaporation and condensation processes of the refrigerant are carried out in the box body, and the adsorption bed, the condenser and the evaporator can finish the transmission work of the refrigerant among the three parts without pipeline connection, so that the refrigerant has good air tightness, simultaneously, the structure of the system is simplified, and the processing and manufacturing cost is reduced.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic view of a refrigeration case according to the present invention;
FIG. 2 is a schematic diagram of an adsorption refrigeration system according to the present invention;
fig. 3 is a schematic structural view of the connecting portion according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
As shown in fig. 1, an adsorption refrigeration system according to the present invention includes a refrigeration case 100, and the refrigeration case 100 includes a case 101, an adsorption bed 102, a condenser 103, and an evaporator 104. The adsorption bed 102 is provided at one side in the tank 101, the condenser 103 and the evaporator 104 are provided at the other side in the tank 101, and the condenser 103 is provided at the upper portion of the tank 101 while the tank 101 holds the refrigerant therein. The working process of the refrigeration box 100 is that the liquid refrigerant absorbs the heat in the evaporator 104 and becomes gas, the gas refrigerant is absorbed by the adsorption bed 102, the adsorption bed 102 is heated to separate out the gas refrigerant again, the gas refrigerant is condensed into liquid by the condenser 103, and the liquid refrigerant directly drops to the evaporator 104, thus completing the cycle of a refrigeration process. The evaporation and condensation processes of the refrigerant are carried out in the box body 101, and the adsorption bed 102, the condenser 103 and the evaporator 104 can complete the transmission work of the refrigerant among the three components without pipeline connection. As shown in fig. 2, the present invention further includes a first water tank 3, a second water tank 4, and a third water tank 5. The first water tank 3 is used for providing hot water for the adsorption bed 102, wherein when the first water tank 3 provides hot water for the adsorption bed 102, the adsorption bed 102 performs desorption process to separate out gaseous refrigerant; the second water tank 4 is used for providing cold water for the adsorption bed 102 and the condenser 103, wherein when the second water tank 4 provides cold water for the adsorption bed 102, the adsorption bed 102 can adsorb gaseous refrigerant, and when the second water tank 4 provides cold water for the condenser 103, the condenser 103 can condense the gaseous refrigerant into a liquid state; the third water tank 5 communicates with the evaporator 104, and heat is absorbed by the refrigerant while water in the third water tank 5 flows through the evaporator 104, so that the third water tank 5 can provide a low temperature to the outside.
Preferably, as shown in fig. 1, the refrigeration cassette 100 further includes a heat insulation plate 106, the heat insulation plate 106 is disposed between the adsorption bed 102 and the evaporator 104 to divide the cassette 101 into two spaces, the adsorption bed 102 is disposed at one side of the heat insulation plate 106, and the condenser 103 and the evaporator 104 are disposed at the other side of the heat insulation plate 106. More preferably, the heat shield 106 encloses a water tank 105 with the side wall of the tank 101, the water tank 105 is used for containing liquid refrigerant, the water tank 105 confines the liquid refrigerant in the tank, and the evaporator 104 is preferably disposed in the water tank 105 and is in direct contact with the liquid refrigerant.
Preferably, the heat insulation plate 106 is provided with a vent hole 108 at a position corresponding to the condenser 103, the refrigerant which absorbs the heat of the evaporator 104 and becomes a gas state is absorbed by the adsorption bed 102 through the vent hole 108, meanwhile, when the gas state refrigerant is condensed into a liquid state by the condenser 103, the liquid state refrigerant can directly drop to the evaporator 104 at the bottom of the condenser 103, the lowest position of the vent hole 108 is higher than the bottom of the condenser 103, and at this time, the heat insulation plate 106 can prevent the liquid state refrigerant at the bottom of the condenser 103 from dropping outside the water tank 105. In addition, since the vent hole 108 is provided at a high position, the liquid refrigerant in the water tank 105 does not flow out of the water tank 105 through the vent hole. The heat insulating plate 106 may be a hollow carbon steel partition plate, and the middle of the heat insulating plate is filled with heat insulating material, or a ceramic plate with heat insulating performance may be used, so that the heat insulating plate 106 may perform a heat insulating function. The pressure in the tank body is relatively high when the adsorption bed in the refrigeration tank 100 is subjected to the desorption process; when the adsorption process is performed, the pressure in the box body 101 is small, the box body 101 is extruded by atmospheric pressure, and at this time, the heat insulation plate 106 is connected with the inner wall of the box body 101, so that the box body 101 can be reinforced and supported.
Preferably, as shown in fig. 2, an adsorption refrigeration system of the present invention includes two refrigeration tanks 100, namely, a first refrigeration tank 1 and a second refrigeration tank 2, wherein the first refrigeration tank 1 includes a first tank 11, a first adsorption bed 12, a first condenser 13, a first evaporator 14, a first water tank 15 and a first heat insulation board 16, the first heat insulation board 16 is provided with a first ventilation hole 18, the second refrigeration tank 2 includes a second tank 21, a second adsorption bed 22, a second condenser 23, a second evaporator 24, a second water tank 25 and a second heat insulation board 26, and the second heat insulation board 26 is provided with a second ventilation hole 28. The adsorption and desorption processes are alternately performed by the adsorption beds in the two refrigeration cases, specifically, when the adsorption process is performed by the first adsorption bed 12 of the first refrigeration case 1, the desorption process is performed by the second adsorption bed 22 of the second refrigeration case 2; when the first adsorption bed 12 of the first refrigeration cassette 1 performs the desorption process, the second adsorption bed 22 of the second refrigeration cassette 2 performs the adsorption process. The adsorption bed of each refrigeration box is respectively and selectively communicated with the first water tank 3 or the second water tank 4 in a circulating way through a plurality of pipelines, in other words, the adsorption bed of each refrigeration box can be selectively communicated with the first water tank 3 in a circulating way or the second water tank 4 in a circulating way; the condenser of each refrigeration box is selectively communicated with the second water tank 4 in a circulating way through a plurality of pipelines; the evaporator of each refrigeration tank is in selective communication with the third tank 5 in a cyclic manner through several lines.
Preferably, as shown in fig. 2, the first water tank 15 of the first refrigerator 1 is communicated with the second water tank 25 of the second refrigerator 2 through one first pipe 7 to exchange the refrigerants in the two water tanks, the first pipe 7 is provided with a throttle valve 71, and the throttle valve 71 can reduce the temperature of the refrigerant flowing therethrough while controlling the flow rate and flow velocity of the refrigerant.
Preferably, as shown in fig. 1, a connection portion 107 for connecting with the first pipeline 7 is provided in the water tank 105 of each refrigeration case 100, and both ends of the first pipeline 7 are respectively communicated with the corresponding connection portions 107. As shown in fig. 3, the connecting portion 107 is a hollow tube, one end of the hollow tube is communicated with the first pipeline 7, the other end of the hollow tube is closed, a plurality of branch pipes with different inner diameters are arranged on the side wall of the hollow tube, and when the refrigerant flows out of the plurality of branch pipes, the flow speed and the flow rate of the refrigerant flowing out of each branch pipe are different due to the different inner diameters of the branch pipes, at the moment, the refrigerant in the water tank 105 can form a vortex, and the mixing of the refrigerant is accelerated. Specifically, as shown in fig. 2, the first casing 11 is provided with a first connection portion 17, the second casing 21 is provided with a second connection portion 27, and the first pipeline 7 communicates with the first connection portion 17 and the second connection portion 27, respectively.
When the first adsorption bed 12 needs to be converted from the desorption process to the adsorption process, the temperature of the refrigerant in the first water tank 15 is higher, in the present invention, the temperature of the refrigerant in the first water tank 15 is generally about 28 ℃, the heat absorption effect of the refrigerant with higher temperature on the first evaporator 14 is not good, and when the second adsorption bed 22 needs to be converted from the adsorption process to the desorption process, the temperature of the refrigerant in the second water tank 25 is lower, if the refrigerants in the first water tank 15 and the second water tank 25 are exchanged, the temperature of the refrigerant in the first water tank 15 is lower when the first adsorption bed 12 is in the adsorption process, so that the heat of the first evaporator 14 is absorbed more efficiently. The principle of realizing the exchange of the refrigerants in the two water tanks is as follows: the pressure in the box body is smaller when the adsorption bed in the refrigeration box is used for adsorption, the pressure in the box body is 1500pa in the invention, and the pressure in the box body is larger when the adsorption bed in the refrigeration box is used for desorption, and the pressure in the box body is 9500pa in the invention; therefore, when the first adsorption bed 12 needs to be converted from the desorption process to the adsorption process, and the second adsorption bed 22 needs to be converted from the adsorption process to the desorption process, the pressure in the first tank 11 is greater than the pressure in the second tank 21, and the refrigerant in the second water tank 25 can flow into the first water tank 15 through the first pipe 7. When the second adsorbent bed 22 needs to be converted from the desorption process to the adsorption process, the first adsorbent bed 12 needs to be converted from the adsorption process to the desorption process, and the above process is reversed.
Preferably, the first adsorbent bed 12 of the first refrigeration cassette 1 is in cyclical communication with the adsorbent bed 22 of the second refrigeration cassette 2 via piping to exchange water within both adsorbent beds. Specifically, when the first adsorbent bed 12 needs to be converted from the desorption process to the adsorption process, the temperature of water in the first adsorbent bed 12 is high, and when the first adsorbent bed 12 is performing the adsorption process, the temperature of water in the first adsorbent bed 12 needs to be low; when the second adsorbent bed 22 needs to be converted from the adsorption process to the desorption process, the temperature of water in the second adsorbent bed 22 is low, and when the second adsorbent bed 22 needs to be subjected to the desorption process, the temperature of water in the second adsorbent bed 22 is high, so that the water in the first adsorbent bed 12 and the second adsorbent bed 22 is exchanged at the moment, the first adsorbent bed 12 is pre-cooled to prepare for the adsorption process, and the second adsorbent bed 22 is pre-heated to prepare for the desorption process.
Preferably, the outer wall of the case 101 is covered with insulation cotton. The aim is that: 1. the heat exchange between the box body 101 and the outside is prevented, so that the loss of cold in the box body 101 is caused; 2. the gaseous refrigerant is prevented from condensing into the liquid refrigerant at the side wall of the tank 101 away from the water tank 105 during the desorption process, and this part of the liquid refrigerant cannot normally flow into the water tank 105, and therefore, during the adsorption process, this part of the liquid refrigerant cannot absorb the heat of the evaporator 104, which generates an ineffective amount of refrigeration.
Preferably, the device further comprises a controller, a plurality of water pumps and electromagnetic valves which are arranged on the pipelines, the controller controls the start and stop of the water pumps and the on and off of the electromagnetic valves, and the communication between different parts is realized through the on and off of the electromagnetic valves at different positions, so that the exchange of refrigerants between two water tanks, the exchange of water between two adsorption beds and the adsorption and desorption process of the two refrigeration boxes are realized alternately. The adsorption refrigeration system comprises five working processes, and the controller can control the working time of each process to enable the five processes to be circularly and orderly carried out, wherein the specific working process is as follows:
the first process comprises the following steps: the first adsorption bed 12 is communicated with the second water tank 4, so that cold water is led into the first adsorption bed 12, the first evaporator 14 is communicated with the third water tank 5, at the moment, the refrigerant in the first water tank 15 absorbs the refrigerant in the gaseous state of the heat of the first evaporator 14, and the first adsorption bed 12 adsorbs the gaseous state refrigerant; the second adsorption bed 22 is communicated with the first water tank 3, hot water is led into the second adsorption bed 22, the second condenser 23 is communicated with the second water tank 4, and cold water is led into the second condenser 23, at this time, the second adsorption bed 22 performs desorption process to separate out gaseous refrigerant in the second adsorption bed, the second condenser 23 condenses the gaseous refrigerant into liquid refrigerant, and the liquid refrigerant drops into the second water tank 25;
the second process is as follows: when the first process is carried out for the preset time, starting a second process, wherein the first process and the second process are carried out simultaneously; the second process is specifically that the first water tank 15 and the second water tank 25 are communicated, the refrigerant in the second water tank 25 flows to the first water tank 15, and the temperature of the refrigerant in the first water tank 15 is gradually increased; when the second process is carried out for the preset time, the first process and the second process are finished at the same time;
and a third process: the first adsorption bed 12 and the second adsorption bed 22 are communicated, so that water in the first adsorption bed 12 and the second adsorption bed 22 is exchanged, the first adsorption bed 12 is preheated, and the second adsorption bed 22 is precooled;
fourth process: the process comprises two steps A and B which are carried out simultaneously;
step A, the second adsorption bed 22 is communicated with the second water tank 4, so that cold water is led into the second adsorption bed 22, the second evaporator 24 is communicated with the third water tank 5, at the moment, the refrigerant in the second water tank 25 absorbs the refrigerant with the heat of the second evaporator 24 changed into gas, and the second adsorption bed 22 adsorbs the gas refrigerant; the first adsorption bed 12 is communicated with the first water tank 3, hot water is led into the first adsorption bed 12, the first condenser 13 is communicated with the second water tank 4, cold water is led into the first condenser 13, at this time, the first adsorption bed 12 performs desorption process to separate out gaseous refrigerant in the first adsorption bed, the first condenser 13 condenses the gaseous refrigerant into liquid refrigerant, and the liquid refrigerant drops to the first water tank 15;
step B, the first water tank 15 and the second water tank 25 are communicated, the refrigerant in the first water tank 15 flows to the second water tank 25, and the first water tank 15 provides the refrigerant with lower temperature for the second water tank 25;
b, ending the step A;
fifth process: after the step B is finished, the step A is continued, and when the step A is carried out for the preset time, a fifth process is started, and the step A and the fifth process are simultaneously carried out; the fifth process is specifically that the first water tank 15 and the second water tank 25 are communicated, the refrigerant in the first water tank 15 flows to the second water tank 25, and the temperature of the refrigerant in the second water tank 25 is gradually increased; when the step A is carried out for the preset time, the step A and the fifth process are finished at the same time;
then, the first process is performed, and the five processes are circularly performed.
Preferably, the invention also comprises a plurality of temperature sensors for sending temperature signals to the controller and a plurality of pressure sensors for sending pressure signals to the controller, when the temperature signals or the pressure signals exceed a threshold value, the controller makes judgment and controls the start and stop of the water pump and the on-off of the electromagnetic valve. For example, in the present embodiment, when the temperature sensor provided in the case 101 detects that the temperature value in the case 101 is 2-3 ℃, the controller stops the system operation, and prevents the evaporator 104 from freezing to cause system damage.
Other structures of an adsorption refrigeration system according to this embodiment are described in the prior art.
The present invention is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present invention are within the scope of the technical proposal of the present invention.
Claims (4)
1. An adsorption refrigeration system, comprising:
the refrigeration box comprises a box body used for containing a refrigerant, an adsorption bed, a condenser and an evaporator, wherein the adsorption bed is arranged on one side in the box body, the condenser and the evaporator are arranged on the other side in the box body, and the condenser is arranged on the upper part of the box body;
a first water tank for providing hot water to the adsorbent bed;
a second water tank for providing cold water to the adsorbent bed and the condenser;
the third water tank is communicated with the evaporator and is used for providing low temperature for the outside;
the refrigeration box further comprises a heat insulation plate, and the heat insulation plate is arranged between the adsorption bed and the evaporator;
the heat insulation plate and the side wall of the box body enclose a water tank for containing liquid refrigerant, and the evaporator is arranged in the water tank;
a vent hole is arranged on the heat insulation plate at a position corresponding to the condenser, and the height of the lowest position of the vent hole exceeds the bottom of the condenser;
the refrigerating box comprises two refrigerating boxes, namely a first refrigerating box and a second refrigerating box;
the adsorption bed of each refrigeration box is respectively and selectively communicated with the first water tank or the second water tank in a circulating way through a plurality of pipelines;
the condenser of each refrigeration box is selectively communicated with the second water tank in a circulating way through a plurality of pipelines;
the evaporator of each refrigeration box is selectively communicated with the third water tank in a circulating way through a plurality of pipelines;
the water tanks of the first refrigeration box are communicated with the water tanks of the second refrigeration box through a first pipeline so as to exchange the refrigerants in the two water tanks; the first pipeline is provided with a throttle valve;
a connecting part used for being connected with the first pipeline is arranged in the water tank of each refrigeration box, and two ends of the first pipeline are respectively communicated with the corresponding connecting parts;
the connecting part is a hollow pipe, one end of the connecting part is communicated with the first pipeline, the other end of the connecting part is closed, and the side wall of the connecting part is provided with a plurality of branch pipes with different inner diameters.
2. An adsorption refrigeration system of claim 1 wherein,
the adsorption beds of the first refrigeration box and the second refrigeration box are circularly communicated through pipelines so as to exchange water in the two adsorption beds.
3. An adsorption refrigeration system according to claim 2 wherein,
the device also comprises a controller, a plurality of water pumps and electromagnetic valves which are arranged on the pipelines, wherein the controller controls the start and stop of the water pumps and the on and off of the electromagnetic valves so as to realize the exchange of refrigerants between the two water tanks, the exchange of water between the two adsorption beds and the adsorption and desorption process of the two refrigeration boxes alternately;
the water pump control system further comprises a plurality of temperature sensors used for sending temperature signals to the controller and a plurality of pressure sensors used for sending pressure signals to the controller, and when the temperature signals or the pressure signals exceed a threshold value, the controller makes judgment and controls the start and stop of the water pump and the on-off of the electromagnetic valve.
4. An adsorption refrigeration system according to any one of claims 1-3 wherein,
the outer wall of the box body is coated with heat preservation cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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