CN219346826U - Absorption type cold and hot water unit capable of melting crystals rapidly - Google Patents

Absorption type cold and hot water unit capable of melting crystals rapidly Download PDF

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Publication number
CN219346826U
CN219346826U CN202320215753.9U CN202320215753U CN219346826U CN 219346826 U CN219346826 U CN 219346826U CN 202320215753 U CN202320215753 U CN 202320215753U CN 219346826 U CN219346826 U CN 219346826U
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heat exchanger
solution
solution heat
refrigerant
temperature
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CN202320215753.9U
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常佳
席斌鹏
刘建涛
王君
陈宁
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CSSC Shuangrui Luoyang Special Equipment Co Ltd
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CSSC Shuangrui Luoyang Special Equipment Co Ltd
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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
    • 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 utility model provides an absorption type cold and hot water unit for fast crystal melting, which comprises a generator, a solution heat exchanger, an absorber, an evaporator and a condenser which are sequentially connected, wherein high-temperature concentrated solution in the generator flows to the absorber through the solution heat exchanger, the high-temperature concentrated solution heats dilute solution in the absorber, the absorber is connected with a solution pump, the dilute solution in the absorber enters the solution heat exchanger through the solution pump to heat and melt crystals in a concentrated solution channel of the solution heat exchanger after being heated and warmed, the evaporator is connected with a refrigerant pump, the refrigerant water which is not evaporated at the bottom of the evaporator is pumped into the evaporator again, a refrigerant crystal melting bypass is additionally arranged at an outlet of the refrigerant pump, one end of the refrigerant crystal melting bypass is connected with an outlet of the refrigerant pump, and the other end of the refrigerant crystal melting bypass is connected with a concentrated solution inlet and/or outlet of the solution heat exchanger. The concentration of the solution is reduced rapidly by directly injecting the cryogen into the concentrated solution, and the heat generated by the chemical reaction of the cryogen and lithium bromide is helpful for rapid crystal melting.

Description

Absorption type cold and hot water unit capable of melting crystals rapidly
Technical Field
The utility model relates to the field of absorption type cold and hot water units, in particular to an absorption type cold and hot water unit capable of rapidly melting crystals.
Background
At present, the absorption type cold and hot water unit mostly adopts a 'lithium bromide-water' working medium pair for circulation, and crystallization is easy to occur under the condition of higher concentration (more than or equal to 64 percent) of the lithium bromide working medium, thereby blocking the outlet of a concentrated solution channel of a solution heat exchanger, further forming blockage of solution circulation and causing the unit to stop.
The solutions currently in common use for this problem are: the generator 1 side is provided with a melting transistor 1a with high-level overflow and throttling functions, when a concentrated solution channel (from the generator 1 to the absorber 6) in the solution heat exchanger 8 is blocked due to crystallization, high-temperature and high-concentration generator solution cannot smoothly flow into the absorber 6, when the liquid level in the generator 1 is high to a certain degree, the high-temperature and high-concentration solution can only flow into the absorber 6 through the melting transistor 1a, after the dilute solution in the absorber 6 is heated and warmed, the high-temperature and high-concentration solution is pumped to the solution heat exchanger 8 and the generator 1 by the solution pump 7, so that crystals in the concentrated solution channel in the solution heat exchanger 8 are heated and melted, and the problem of crystallization blocking is solved.
Although the existing scheme has the function of crystal melting, the following problems still exist: the method of indirect heating and crystal melting is adopted, so that the crystal melting speed is slower especially when the solution amount at the bottom of the absorber is larger.
Disclosure of Invention
In view of the above, the present utility model aims to provide an absorption type hot and cold water unit capable of fast melting crystals, so as to solve the problem of slow melting speed in the prior art.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
the utility model provides an absorption cold and hot water unit of quick crystal melting, includes generator, solution heat exchanger, absorber, evaporimeter and the condenser that connects gradually, the interior high temperature concentrated solution of generator flows to the absorber through the solution heat exchanger, and the high temperature concentrated solution is right dilute solution in the absorber heats, dilute solution in the absorber heats after rising the temperature through solution pump gets into solution heat exchanger and heats the crystallization in the concentrated solution passageway of solution heat exchanger and melts, the evaporimeter is connected with the refrigerant pump, the refrigerant water that the evaporimeter bottom did not evaporate pumps to inside the evaporimeter again the export of refrigerant pump adds the refrigerant and melts the crystal bypass, refrigerant melts crystal bypass one end with the exit linkage of refrigerant pump, the other end of refrigerant melts the crystal bypass and connects the concentrated solution import and/or the export of solution heat exchanger.
Further, the solution heat exchanger is arranged to be of a two-stage structure and comprises a low-temperature solution heat exchanger and a high-temperature solution heat exchanger respectively, the low-temperature solution heat exchanger and the high-temperature solution heat exchanger are connected in series, the low-temperature solution heat exchanger is arranged at the downstream of the high-temperature solution heat exchanger, the high-temperature solution heat exchanger is connected with the generator, and the low-temperature solution heat exchanger is connected with the absorber.
Further, one end of the cold agent crystal melting bypass, which is far away from the cold agent pump, is connected with the inlet and/or the outlet of the low-temperature solution heat exchanger.
Further, one end of the refrigerant crystal melting bypass, which is far away from the refrigerant pump, is provided with a first branch and a second branch, the first branch is connected with the concentrated solution inlet of the low-temperature solution heat exchanger, and the second branch is connected with the concentrated solution outlet of the low-temperature solution heat exchanger.
Further, a first electromagnetic valve is arranged on the first branch, a second electromagnetic valve is arranged on the second branch, and the on-off of the two branches is controlled by controlling the opening and closing of the first electromagnetic valve and the second electromagnetic valve.
Further, one end of the cold agent crystal melting bypass, which is far away from the cold agent pump, is only connected with the concentrated solution inlet of the low-temperature solution heat exchanger.
Further, one end of the cold agent crystal melting bypass, which is far away from the cold agent pump, is only connected with the concentrated solution outlet of the low-temperature solution heat exchanger.
Further, a solution throttling element is arranged on the concentrated solution channel between the generator and the high-temperature solution heat exchanger, and the solution throttling element is used for controlling the flow of the high-temperature concentrated solution flowing out of the generator.
Further, the position of the generator, which is close to the upper part, is connected with the condenser, the condenser is connected with the evaporator through a pipeline, condensed steam generated in the generator enters the condenser, cooling water is arranged in the condenser pipe, and the cooling water formed by condensing the steam outside the condenser pipe enters the evaporator through a pipeline.
Further, a refrigerant throttling element is arranged on a pipeline between the condenser and the evaporator, and the refrigerant throttling element is used for controlling the flow of cooling water discharged by the condenser.
Compared with the prior art, the absorption type cold and hot water unit has the following advantages:
1) The refrigerant is directly injected into the concentrated solution, so that the concentration of the solution is rapidly reduced, and the rapid crystal melting is facilitated; the refrigerant is directly injected into the concentrated solution, and the chemical reaction between the refrigerant and lithium bromide is generated to generate chemical reaction heat, thereby being beneficial to rapid crystal melting; meanwhile, as the crystals are loose structures, the refrigerant is alternately or intermittently injected into the inlet or the outlet of the solution heat exchanger to generate pressure oscillation of the inlet and the outlet of the channel, so that the loose crystals are oscillated, and the rapid crystal melting is facilitated.
2) The solution heat exchanger is divided into two stages, so that the amount of cold and heating required by crystal melting is reduced, and the rapid crystal melting is facilitated.
3) The electromagnetic valve is turned on/off at a higher frequency under the condition of serious crystallization so as to realize the purpose of faster crystal melting, and is turned on/off at a lower frequency under the condition of not serious crystallization so as to realize the purpose of prolonging the service life of the electromagnetic valve.
Drawings
FIG. 1 is a schematic diagram of a prior art melting system;
FIG. 2 is a schematic diagram of a melting system according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a melting system according to a second embodiment of the utility model;
fig. 4 is a schematic diagram of a melting system according to a third embodiment of the utility model.
Reference numerals illustrate:
1-generator, 1 a-melting transistor, 2-condenser, 3-refrigerant throttling element, 4-refrigerant pump, 5-evaporator, 6-absorber, 7-solution pump, 8-low temperature solution heat exchanger, 9-high temperature solution heat exchanger, 10-solution throttling element, 11-refrigerant melting bypass, 12-first electromagnetic valve, 13-second electromagnetic valve
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The utility model provides an absorption cold and hot water unit, including generator 1 that connects gradually, the solution heat exchanger, the absorber 6, the evaporimeter 5 and condenser 2, high temperature concentrated solution in the generator 1 flows to the absorber 6 through the solution heat exchanger, high temperature concentrated solution heats the dilute solution in the absorber 6, the absorber 6 is connected with solution pump 7, dilute solution in the absorber 6 heats the back and gets into the solution heat exchanger through solution pump 7 after rising the temperature, heat and melt the crystallization in the concentrated solution passageway of solution heat exchanger, the evaporimeter 5 is connected with refrigerant pump 4, the refrigerant water that the evaporimeter 5 bottom did not reach is pumped into the evaporimeter 5 inside again, the export at refrigerant pump 4 melts brilliant bypass 11, the export connection of refrigerant melt brilliant bypass 11 one end and refrigerant pump 4, the other end connection solution heat exchanger's of refrigerant melt the concentrated solution import and/or export for to the concentrated solution passageway of solution heat exchanger, when the solution passageway of solution heat exchanger is beaten into by crystallization and is stopped up, can be through the direct dissolution of control refrigerant, refrigerant and lithium bromide chemistry heat exchange, the import and the concentrated solution of alternate four heat exchange measures are beaten in grades, the order of realization.
Further, the solution heat exchanger is arranged to be of a two-stage structure and comprises a low-temperature solution heat exchanger 8 and a high-temperature solution heat exchanger 9 respectively, the low-temperature solution heat exchanger 8 and the high-temperature solution heat exchanger 9 are connected in series, the low-temperature solution heat exchanger 8 is arranged at the downstream of the high-temperature solution heat exchanger 9, the high-temperature solution heat exchanger 9 is connected with the generator 1, and the low-temperature solution heat exchanger 8 is connected with the absorber 6. One end of the refrigerant melt bypass 11, which is remote from the refrigerant pump 4, is connected to the inlet and/or outlet of the low temperature solution heat exchanger 8.
As one embodiment of the present utility model, the end of the coolant-melting bypass 11, which is far away from the coolant pump 4, is provided with two branches, which are respectively connected to the concentrated solution inlet and outlet of the low-temperature solution heat exchanger 8.
Specifically, one end of the refrigerant crystal melting bypass 11, which is far away from the refrigerant pump 4, is provided with a first branch and a second branch, wherein the first branch is connected with a concentrated solution inlet of the low-temperature solution heat exchanger 8, and the second branch is connected with a concentrated solution outlet of the low-temperature solution heat exchanger 8.
Further, a first electromagnetic valve 12 is arranged on the first branch, a second electromagnetic valve 13 is arranged on the second branch, and the opening and closing of the two branches are respectively controlled by controlling the on-off of the first electromagnetic valve 12 and the second electromagnetic valve 13. The electromagnetic valve can be switched on/off in a variable frequency according to the severity of crystallization, and can be switched on/off at a higher frequency under the serious crystallization condition so as to realize the purpose of faster crystal melting, and can be switched on/off at a lower frequency under the non-serious crystallization condition so as to realize the purpose of prolonging the service life of the electromagnetic valve
As one of the embodiments of the present utility model, the end of the refrigerant melt bypass 11 remote from the refrigerant pump 4 may be connected only to the concentrated solution inlet of the low temperature solution heat exchanger 8.
As one of the embodiments of the present utility model, the end of the refrigerant melt bypass 11 remote from the refrigerant pump 4 may be connected only to the concentrated solution outlet of the low temperature solution heat exchanger 8.
Further, a solution throttling element 10 is arranged on the concentrated solution channel between the generator 1 and the high-temperature solution heat exchanger 9, and the solution throttling element 10 is used for controlling the flow of the high-temperature concentrated solution flowing out of the generator 1.
The position of the generator 1, which is close to the upper part, is connected with the condenser 2, the condenser 2 is connected with the evaporator 5 through a pipeline, condensed steam generated in the generator 1 enters the condenser 2, cooling water is arranged in a pipe of the condenser 2, refrigerant water formed after condensing the steam outside the condenser pipe enters the evaporator 5 through a pipeline, a refrigerant throttling element 3 is arranged on the pipeline between the condenser 2 and the evaporator 5, and the refrigerant throttling element 3 is used for controlling the flow of cooling water discharged by the condenser 2.
Example 1
As shown in fig. 2, the first process flow divides the solution heat exchanger into two stages, namely a low-temperature solution heat exchanger 8 and a high-temperature solution heat exchanger 9, and adds a refrigerant crystal melting bypass 11 at the outlet of the refrigerant pump 4, which is respectively led to the inlet and the outlet of the concentrated solution channel of the low-temperature solution heat exchanger 8, and the refrigerant is pumped into the inlet and the outlet of the concentrated solution channel of the low-temperature solution heat exchanger 8 under the control of an electromagnetic valve 12 and an electromagnetic valve 13. When crystallization occurs, the concentrated solution channel of the low-temperature solution heat exchanger 8 is blocked by crystallization, at the moment, the first electromagnetic valve 12 and the second electromagnetic valve 13 are alternately opened at a certain frequency, and the refrigerant is alternately injected into the inlet and the outlet of the concentrated solution channel of the low-temperature solution heat exchanger 8 at a certain frequency to melt the crystals. The method adopts four measures of direct injection of the refrigerant into the solution, chemical heating of the refrigerant and lithium bromide, alternate injection of the refrigerant at the inlet and the outlet of the concentrated solution channel and classification of the solution heat exchanger, so that rapid crystal melting can be realized.
Example 2
As shown in fig. 3, the second process flow divides the solution heat exchanger into two stages, namely a low-temperature solution heat exchanger 8 and a high-temperature solution heat exchanger 9, and simultaneously adds a cold-melting bypass 11 at the outlet of the cold pump 4, and the cold-melting bypass is led to the inlet of the concentrated solution channel of the low-temperature solution heat exchanger 8, and the cold agent is injected into the inlet of the concentrated solution channel of the low-temperature solution heat exchanger 8 under the control of the first electromagnetic valve 12. When crystallization occurs, the concentrated solution channel of the low-temperature solution heat exchanger 8 is blocked by crystallization, at the moment, the first electromagnetic valve 12 is intermittently opened at a certain frequency, and the refrigerant is intermittently injected into the concentrated solution channel inlet of the low-temperature solution heat exchanger 8 at a certain frequency to perform crystallization. The four measures of direct injection of the refrigerant into the solution, chemical heating of the refrigerant and lithium bromide, intermittent injection of the refrigerant into the inlet of the concentrated solution channel and classification of the solution heat exchanger are adopted, so that rapid crystal melting can be realized.
Example 3
As shown in fig. 4, in the third process flow, a coolant crystal melting bypass 11 is added at the outlet of the coolant pump 4, and is led to the outlet of the concentrated solution channel of the solution heat exchanger 8, and the coolant is injected into the outlet of the concentrated solution channel of the solution heat exchanger 8 under the control of a second electromagnetic valve 13. When crystallization occurs, the concentrated solution channel of the solution heat exchanger 8 is blocked by crystallization, at the moment, the second electromagnetic valve 13 is intermittently opened at a certain frequency, and a refrigerant is intermittently injected into the concentrated solution channel outlet of the solution heat exchanger 8 at a certain frequency to perform crystallization. The method adopts four measures of direct injection of the refrigerant into the solution, chemical heating of the refrigerant and lithium bromide, intermittent injection of the refrigerant at the outlet of the concentrated solution channel and classification of the solution heat exchanger, so that rapid crystal melting can be realized.
Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

Claims (10)

1. The utility model provides an absorption cold and hot water unit of quick crystal melting, includes generator (1), solution heat exchanger, absorber (6), evaporimeter (5) and condenser (2) that connect gradually, high temperature concentrated solution in generator (1) flows to absorber (6) through solution heat exchanger, and high temperature concentrated solution is right dilute solution in absorber (6) is heated, evaporimeter (5) are connected with refrigerant pump (4), the refrigerant water that evaporation (5) bottom did not evaporate pumps to inside evaporimeter (5) once more, a serial communication port add refrigerant crystal melting bypass (11) in the export of refrigerant pump (4), refrigerant crystal melting bypass (11) one end with the exit linkage of refrigerant pump (4), the other end of refrigerant crystal melting bypass (11) is connected solution heat exchanger's concentrated solution import and/or export.
2. The absorption chiller-heater unit according to claim 1, wherein the solution heat exchanger is configured in a two-stage structure and comprises a low-temperature solution heat exchanger (8) and a high-temperature solution heat exchanger (9), the low-temperature solution heat exchanger (8) and the high-temperature solution heat exchanger (9) are connected in series, the low-temperature solution heat exchanger (8) is arranged at the downstream of the high-temperature solution heat exchanger (9), the high-temperature solution heat exchanger (9) is connected with the generator (1), and the low-temperature solution heat exchanger (8) is connected with the absorber (6).
3. Absorption chiller-heater unit according to claim 2, characterised in that the end of the coolant melt bypass (11) remote from the coolant pump (4) is connected to the inlet and/or outlet of the cryogenic solution heat exchanger (8).
4. The absorption chiller-heater unit according to claim 2, wherein the cold agent crystal melting bypass (11) is provided with a first branch and a second branch at one end far away from the cold agent pump (4), the first branch is connected with the concentrated solution inlet of the low-temperature solution heat exchanger (8), and the second branch is connected with the concentrated solution outlet of the low-temperature solution heat exchanger (8).
5. The absorption chiller-heater unit according to claim 4, wherein a first electromagnetic valve (12) is disposed on the first branch, a second electromagnetic valve (13) is disposed on the second branch, and the on-off of the two branches is controlled by controlling the opening and closing of the first electromagnetic valve (12) and the second electromagnetic valve (13).
6. Absorption chiller-heater unit according to claim 2, characterised in that the end of the cold agent crystallisation bypass (11) remote from the cold agent pump (4) is connected only to the concentrated solution inlet of the cold solution heat exchanger (8).
7. Absorption chiller-heater unit according to claim 2, characterised in that the end of the cold agent crystallisation bypass (11) remote from the cold agent pump (4) is connected only to the concentrated solution outlet of the cold solution heat exchanger (8).
8. Absorption chiller-heater unit according to claim 2, characterized in that a solution throttling element (10) is arranged on the concentrated solution channel between the generator (1) and the high temperature solution heat exchanger (9), the solution throttling element (10) being used for controlling the flow of the high temperature concentrated solution flowing out of the generator (1).
9. The absorption chiller-heater unit according to claim 1, wherein the generator (1) is connected to the condenser (2) at a position near the upper portion, the condenser (2) is connected to the evaporator (5) through a pipeline, the condensed steam generated in the generator (1) enters the condenser (2), cooling water is in the pipe of the condenser (2), and the refrigerant water formed by condensing the steam outside the pipe of the condenser (2) enters the evaporator (5) through a pipeline.
10. Absorption chiller-heater unit according to claim 9 wherein a refrigerant throttling element (3) is arranged in the line between the condenser (2) and the evaporator (5), the refrigerant throttling element (3) being adapted to control the flow of cooling water discharged from the condenser (2).
CN202320215753.9U 2023-02-15 2023-02-15 Absorption type cold and hot water unit capable of melting crystals rapidly Active CN219346826U (en)

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Application Number Priority Date Filing Date Title
CN202320215753.9U CN219346826U (en) 2023-02-15 2023-02-15 Absorption type cold and hot water unit capable of melting crystals rapidly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320215753.9U CN219346826U (en) 2023-02-15 2023-02-15 Absorption type cold and hot water unit capable of melting crystals rapidly

Publications (1)

Publication Number Publication Date
CN219346826U true CN219346826U (en) 2023-07-14

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CN202320215753.9U Active CN219346826U (en) 2023-02-15 2023-02-15 Absorption type cold and hot water unit capable of melting crystals rapidly

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