A lithium bromide absorption heat pump
By introducing multi-stage absorbers and multi-stage generators into lithium bromide absorption heat pumps, the problem of large heat source loss in the prior art is solved, and more efficient heat transfer and utilization are achieved.
Patent Information
- Application Number
- CN202420470584.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-03-12
AI Technical Summary
The existing lithium bromide absorption heat pumps are easily affected by the cooling water temperature during heating, resulting in large heat source loss and low efficiency.
A lithium bromide absorption heat pump including a multi-stage absorber and a multi-stage generator is designed. The absorption efficiency of low-temperature refrigerant steam and the dilute solution conversion rate of lithium bromide concentrated solution are improved through the multi-stage absorber, and the multi-stage generator improves the driving efficiency of the external heat source.
It effectively improves the utilization rate of heat sources, reduces the loss of heat sources, and greatly improves the heat transfer efficiency.
Smart Images
Figure CN222747516U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heating heat pumps, in particular to a lithium bromide absorption heat pump. Background Art
[0002] Lithium bromide absorption heat pump utilizes the heat transfer effect generated during the evaporation and condensation of water, as well as the absorption and analysis of water vapor by lithium bromide aqueous solution. Its main components are evaporator, absorber, condenser and generator. To further improve efficiency, a solution heat exchanger is placed between the generator and the absorber. According to the different combinations of these main equipment, it can be divided into type I absorption heat pump and type II absorption heat pump. Type I absorption heat pump consumes high-temperature heat source as the cost, and inputs high-temperature heat energy (steam, fuel) into the system to increase the temperature of the heat energy of low-level heat source (waste heat) and supply it to users in the form of medium temperature. Type II absorption heat pump drives the system to operate by inputting medium-temperature heat energy (waste heat) without supplying other high-temperature heat sources, and improves the quality of part of the heat energy, which becomes high-temperature hot water or steam and is sent to users, while the other part is discharged to the environment.
[0003] At present, a type of absorption heat pump is the most widely used, and is often used in collective heating. Since its heat pump is greatly affected by the temperature of cooling water, it is easy to cause a large amount of heat source loss during its heating period. Therefore, it is necessary to propose a technology to improve the above defects. Utility Model Content
[0004] In view of the above-mentioned deficiencies and defects of the lithium bromide absorption heat pump in the prior art, in order to achieve the above-mentioned purpose, the utility model provides a lithium bromide absorption heat pump, comprising:
[0005] An evaporator, an absorber, a generator and a condenser, wherein the absorber comprises a primary absorber and a secondary absorber, the evaporator is connected to the primary absorber, the primary absorber is connected to the secondary absorber, the secondary absorber is connected to the generator, the other end of the generator is connected to the condenser, and the other end of the condenser is connected to the evaporator to form a circulation system.
[0006] As a preferred technical solution, the generator includes a primary generator, a secondary generator, a tertiary generator and a quaternary generator, one end of the secondary absorber is respectively connected to the primary generator and the quaternary generator, a pump group is also arranged between the secondary absorber and the primary generator, and a heat exchanger is arranged between the quaternary generator and the secondary absorber.
[0007] As a preferred technical solution, the condenser includes a first condenser, a second condenser and a third condenser, and the generator is connected to the first condenser.
[0008] As a preferred technical solution, an auxiliary device is also included, and the auxiliary device is arranged between the absorber and the condenser for transferring heat inside the absorber.
[0009] As a preferred technical solution, it also includes a control system, one end of which is connected to the power supply for receiving control signals and sending operation signals.
[0010] As described above, the lithium bromide absorption heat pump provided by the utility model has the following beneficial effects:
[0011] The utility model arranges multiple levels of absorbers and multiple levels of generators. The multiple levels of absorbers can not only improve the absorption efficiency of low-temperature refrigerant steam, but also increase the rate of converting lithium bromide concentrated solution into dilute solution. The multiple levels of generators can improve the driving efficiency of external heat sources and generate high-pressure refrigerant steam with less energy, thereby improving the utilization rate of heat sources, reducing the loss of heat sources, and greatly improving the heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The display is a schematic diagram of the structure flow of the utility model.
[0013] 1. Evaporator; 2. Absorber; 201. Primary absorber; 202. Secondary absorber; 3. Generator; 301. Primary generator; 302. Secondary generator; 303. Third generator; 304. Fourth generator; 4. Condenser; 401. First condenser; 402. Second condenser; 403. Third condenser; 5. Auxiliary device; 6. Control system; 7. Pump group; 8. Heat exchanger. DETAILED DESCRIPTION
[0014] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.
[0015] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation, the form, quantity, positional relationship and proportion of each component in actual implementation can be changed at will under the premise of realizing the technical solution of this party, and the component layout form may also be more complicated.
[0016] Example
[0017] This embodiment provides a lithium bromide absorption heat pump. Figure 1 The heat pump includes an evaporator 1, an absorber 2, a generator 3 and a condenser 4. The evaporator 1 absorbs heat from a low-temperature heat source by means of evaporation of the refrigerant. The absorber 2 is used to absorb low-temperature refrigerant vapor and release absorption heat. The generator 3 boils the dilute lithium bromide solution to produce high-pressure refrigerant vapor; the dilute solution is concentrated at the same time. The condenser 4 condenses the high-pressure refrigerant vapor produced by the generator into refrigerant water and releases heat.
[0018] Still refer to the attached Figure 1 The evaporator 1 is connected to one end of the absorber 2, and the absorber 2 includes a primary absorber 201 and a secondary absorber 202. Specifically, the evaporator 1 is connected to the primary absorber 201, the primary absorber 201 is connected to the secondary absorber 202, the secondary absorber 202 is connected to the generator 3, and the generator 3 includes a first generator 301, a second generator 302, a third generator 303 and a fourth generator 304. Specifically, one end of the secondary absorber 202 is connected to the primary generator 301, and the fourth receiver 304 is connected to the secondary absorber 2 02, and a pump group 7 is also provided between the secondary absorber 202 and the primary generator 301, which is used to transfer the dilute lithium bromide solution inside the absorber. A heat exchanger 8 is provided between the secondary absorber 20 and the fourth generator 304, which is used to transfer the concentrated solution inside the generator 3. A condenser 4 is provided at the other end of the generator 3. The condenser 4 includes a first condenser 401, a second condenser 402 and a third condenser 403. The other end of the condenser 4 is connected to the evaporator 1 to form a closed-loop circulation system. The heat pump also includes an auxiliary device 5 and a control system 6. The auxiliary device 5 is mainly used for heat transfer in the absorber 2. One end of the auxiliary device 5 is connected to the secondary absorber 202, and the other end is connected to the condenser 4. The control system 6 is mainly used for the operation of the overall system, responsible for receiving, controlling and sending operation signals, and one end of the control system is connected to a power supply.
[0019] Still refer to the attached Figure 1When the heat pump is in use, the whole is connected to the power supply, the control system 6 receives the control signal and sends out the operation signal instruction, the refrigerant enters the evaporator 1, and the evaporator 1 absorbs the waste hot water from the outside. After the operation of the evaporator 1, the refrigerant becomes a low-temperature steam state, and the low-temperature refrigerant steam enters the primary absorber 201. After being processed by the primary absorber 201, it enters the secondary absorber 202. The outside of the secondary absorber 202 is connected to the hot water supply pipeline. The low-temperature refrigerant steam passes through the primary absorber 201 and the secondary absorber 202 inside the absorber 2 and is absorbed by the lithium bromide concentrated solution in multiple stages to become a dilute solution. In addition, a large amount of heat will be released during the reaction process inside the absorber 2. The heat is transferred from the secondary absorber 202 to the secondary absorber 202. The lithium bromide solution is delivered to the auxiliary device 5, and then transferred to the condenser 4 through the auxiliary device 5. The dilute lithium bromide solution enters the generator through the pump group 7. The outside of the generator 3 is connected to a variety of high-temperature driving heat sources. Preferably, the heat source in this embodiment is high-temperature steam. The inside of the generator 3 is heated by the high-temperature driving heat source. The dilute lithium bromide solution enters the first-stage generator 301. After the multi-stage reaction between the second-stage generator 302, the third-stage generator 303 and the fourth-stage generator 304, a large amount of water in the lithium bromide solution is converted into steam to generate high-pressure refrigerant steam. The concentration of the lithium bromide solution is increased to become a lithium bromide concentrated solution. After the multi-stage reaction, the lithium bromide concentrated solution reaches the fourth-stage generator 304. The concentrated solution is transferred to the absorber 2 through the heat exchanger 8. The high-pressure refrigerant steam enters the condenser 4. The multiple condensers 4 inside the condenser 4 work simultaneously to condense the high-pressure refrigerant steam into water and release a large amount of heat. The condensed water enters the evaporator 1 to form a heat-releasing closed-loop circulation system.
[0020] In summary, the utility model can effectively improve the absorption efficiency of the absorber during the absorption process by setting multiple levels of absorbers and multiple levels of generators. The multi-level generator is beneficial to improving the efficiency of lithium bromide boiling heat exchange, promoting the generation of high-pressure refrigerant steam, and is beneficial to improving heat exchange capacity, reducing heat loss, and improving heat pump efficiency.
[0021] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.
Claims
1. A lithium bromide absorption heat pump, comprising an evaporator, an absorber, a generator and a condenser, characterized in that: The absorber includes a primary absorber and a secondary absorber, the primary absorber is connected to the secondary absorber, the secondary absorber is connected to the generator, the other end of the generator is connected to the condenser, and the other end of the condenser is connected to the evaporator to form a circulation system; the generator includes a primary generator, a secondary generator, a tertiary generator and a fourth-stage generator, one end of the secondary absorber is respectively connected to the primary generator and the fourth-stage generator, wherein a pump group is also arranged between the secondary absorber and the primary generator, and a heat exchanger is arranged between the fourth-stage generator and the secondary absorber.
2. A lithium bromide absorption heat pump according to claim 1, characterized in that: The condenser comprises a first condenser, a second condenser and a third condenser, and the generator is connected to the first condenser.
3. A lithium bromide absorption heat pump according to claim 1, characterized in that: The invention also comprises an auxiliary device, which is arranged between the absorber and the condenser and is used for transferring the heat inside the absorber.
4. A lithium bromide absorption heat pump according to claim 1, characterized in that: The device also includes a control system, one end of which is connected to a power source and is used to receive control signals and send operating signals.