Absorption type cooling and heating unit

Abstract

According to the absorption type cooling and heating unit, in the cold supply mode, the refrigerant pump can pump the refrigerant from the bottom of the evaporator to the top of the evaporator, in the heat supply mode, the refrigerant pump can pump the refrigerant from the refrigerant container to the generator, the cold supply mode and the heat supply mode share the same refrigerant pump, and therefore the production cost is saved. Besides, in the heat supply mode, the heating water enters the condenser without passing through the absorber, so that the pressure loss of the heating water is reduced, a user system can be provided with a heating water pump with lower pressure, and the use cost is saved. In addition, in the heat supply mode, the refrigerant is distributed in the generator in a spraying mode, the liquid distribution uniformity is good, and therefore the heat supply effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of absorption units, and in particular to an absorption cooling and heating unit. Background Art

[0002] Most absorption chillers only have cooling function but no heating function, which are called absorption chillers. If there is a heating demand in the occasion where the absorption chiller is used, the heating purpose is usually achieved by configuring a water-to-water heat exchanger.

[0003] There are also some absorption units that have both cooling and heating functions, which are called absorption cooling and heating units. The production cost of absorption cooling and heating units on the market is relatively high, and when using them, a higher pressure heating water pump needs to be configured in the user system to meet the user's heating needs, so the cost of use is also relatively high.

[0004] In view of this, how to reduce the cost of absorption cooling and heating units is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] To solve the above problems, the present application provides an absorption cooling and heating unit, which includes an evaporator, an absorber, a generator, a condenser, a refrigerant pump and a refrigerant container, wherein the refrigerant pump inlet is connected to the bottom of the evaporator and the refrigerant container, and the refrigerant pump outlet is connected to the top of the evaporator and the generator.

[0006] In one embodiment of the absorption cooling and heating unit, a valve is provided on the connecting pipeline between the refrigerant pump inlet and the bottom of the evaporator, and a valve is provided on the connecting pipeline between the refrigerant pump inlet and the refrigerant container.

[0007] An implementation manner of an absorption cooling and heating unit, the absorption cooling and heating unit includes a cooling water pipeline and a heating water inlet pipeline, the absorber is connected to the cooling water pipeline, the condenser is connected to the cooling water pipeline and is located downstream of the absorber, and the heating water inlet pipeline is connected to the cooling water pipeline and the connection position is located downstream of the absorber and upstream of the condenser, so that the heating water enters the condenser without passing through the absorber.

[0008] An implementation manner of an absorption cooling and heating unit, the absorption cooling and heating unit comprises a heating water outlet pipeline, the heating water outlet pipeline is connected to the cooling water pipeline and the connection position is located downstream of the condenser.

[0009] In one implementation manner of the absorption cooling and heating unit, a valve is provided on the heating water inlet pipe, and a valve is provided on the heating water outlet pipe.

[0010] In one embodiment of the absorption cooling and heating unit, valves are provided on the cooling water pipeline, upstream of the absorber, between the absorber and the position connected to the heating water inlet pipeline, and downstream of the position connected to the heating water outlet pipeline.

[0011] In one embodiment of the absorption cooling and heating unit, the generator includes a spray device, and the refrigerant pump outlet is specifically connected to the spray device of the generator, so that the refrigerant is distributed in the generator in a spraying manner.

[0012] An embodiment of an absorption cooling and heating unit, the absorption cooling and heating unit includes a dilute absorption liquid pipeline connected between the absorber and the generator, the dilute absorption liquid pipeline is provided with a valve and a dilute absorption liquid pump, and also includes a refrigerant inlet pipeline connected to the refrigerant pump outlet, the outlet of the refrigerant inlet pipeline is connected to the dilute absorption liquid pipeline and the connection position is located downstream of the valve on the dilute absorption liquid pipeline, and the refrigerant inlet pipeline is provided with a valve.

[0013] An embodiment of an absorption cooling and heating unit, the absorption cooling and heating unit includes a first refrigerant outlet pipeline. In a heating mode, the liquid refrigerant in the condenser can flow back to the refrigerant container through the first refrigerant outlet pipeline, and a valve is provided on the first refrigerant outlet pipeline.

[0014] An embodiment of an absorption cooling and heating unit, the absorption cooling and heating unit includes a second refrigerant outlet pipeline. In the heating mode, the liquid refrigerant at the bottom of the generator can flow back to the refrigerant container through the second refrigerant outlet pipeline, and a valve is provided on the second refrigerant outlet pipeline.

[0015] In the present application, in the cooling mode, the refrigerant pump can pump the refrigerant from the bottom of the evaporator to the top of the evaporator, and in the heating mode, the refrigerant pump can pump the refrigerant from the refrigerant container to the generator. The cooling mode and the heating mode share the same refrigerant pump, thereby saving production costs. In addition, in the heating mode, the heating water does not enter the condenser through the absorber, which reduces the pressure loss of the heating water, allowing the user system to be equipped with a lower pressure heating water pump, thereby saving the cost of use. In addition, in the heating mode, the refrigerant is distributed in the generator in a spraying manner, and the distribution uniformity is better, thereby improving the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A flow chart of an embodiment of the absorption cooling and heating unit provided in the present application;

[0017] Figure 2 The medium-thick solid line shows Figure 1 The process of the absorption chiller in cooling mode is shown;

[0018] Figure 3 The medium-thick solid line shows Figure 1 The process of the absorption cooling and heating unit in heating mode is shown.

[0019] The following are the descriptions of the reference numerals:

[0020] 1 absorber, 2 evaporator, 3 condenser, 4 generator, 5 dilute absorption liquid pump, 6 concentrated absorption liquid pump, 7 refrigerant pump, 8 heat exchanger, 9 refrigerant container, 10 first refrigerant outlet pipeline, 11 cold water inlet pipeline, 12 cold water outlet pipeline, 13 cooling water pipeline, 14 refrigerant inlet pipeline, 15 heating water inlet pipeline, 16 heating water outlet pipeline, 17 heat source inlet pipeline, 18 heat source outlet pipeline, 19 second refrigerant outlet pipeline, 21, 22, 23, 24, 25, 26, 31, 32, 33, 34, 35, 36 are all valves. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] The present application provides an absorption cooling and heating unit, such as Figure 1 As shown, the absorption cooling and heating unit includes an evaporator 2, an absorber 1, a generator 4, a condenser 3, a refrigerant pump 7 and a refrigerant container 9. The inlet of the refrigerant pump 7 is connected to the bottom of the evaporator 2 and the refrigerant container 9, and the outlet of the refrigerant pump 7 is connected to the top of the evaporator 2 and the generator 4.

[0023] When the absorption cooling and heating unit is in cooling mode, the refrigerant at the bottom of the evaporator 2 can be sent to the top of the evaporator 2 through the refrigerant pump 7. When the absorption cooling and heating unit is in heating mode, the refrigerant in the refrigerant container 9 can be sent to the generator 4 through the refrigerant pump 7. In the generator 4, the refrigerant absorbs the heat of the heat source to generate refrigerant steam, and the generated refrigerant steam enters the condenser 3. In the condenser 3, the refrigerant steam condenses and releases heat to heat the heating water, thereby realizing the heating function.

[0024] In order to achieve heating and cooling functions, the previous absorption cooling and heating units would be equipped with two pumps, a heating refrigerant pump 7 and a cooling refrigerant pump 7. The former is responsible for pumping refrigerant into the generator 4, and the latter is responsible for pumping the refrigerant pump 7 at the bottom of the evaporator 2 to the top of the evaporator 2. The configuration cost of the two pumps is relatively high, resulting in a relatively high production cost of the absorption cooling and heating units.

[0025] In the present application, the same refrigerant pump 7 can not only pump refrigerant into the generator 4, but also pump the refrigerant at the bottom of the evaporator 2 to the top of the evaporator 2. Therefore, the number of refrigerant pumps 7 is reduced and the production cost is reduced.

[0026] Specifically, a valve member (indicated by 21 in the figure) is provided on the connecting pipeline between the inlet of the refrigerant pump 7 and the bottom of the evaporator 2, and a valve member (indicated by 31 in the figure) is provided on the connecting pipeline between the inlet of the refrigerant pump 7 and the refrigerant container 9. In the heating mode, the valve member indicated by 31 is opened, and the valve member indicated by 21 is closed. In the cooling mode, the valve member indicated by 21 is opened, and the valve member indicated by 31 is closed.

[0027] Specifically, the absorption cooling and heating unit includes a cooling water pipeline 13, the absorber 1 is connected to the cooling water pipeline 13, and the condenser 3 is connected to the cooling water pipeline 13 and is located downstream of the absorber 1. In the cooling mode, cooling water is introduced into the cooling water pipeline 13, and the cooling water first flows through the absorber 1 to keep the absorption liquid in the absorber 1 at a lower temperature so as to maintain a good absorption capacity, and then flows through the condenser 3 to condense the refrigerant vapor in the condenser 3 into liquid refrigerant.

[0028] Specifically, the absorption cooling and heating unit includes a heating water inlet pipe 15 and a heating water outlet pipe 16. In the heating mode, heating water can be passed to the condenser 3 through the heating water inlet pipe 15, and the heating water is heated by the refrigerant steam in the condenser 3. The heated heating water can be sent to the user system through the heating water outlet pipe 16.

[0029] Specifically, the heating water inlet pipe 15 can be connected to the cooling water pipe 13 and the connection position is located downstream of the absorber 1 and upstream of the condenser 3. With this design, the heating water does not pass through the absorber 1 and enters the condenser 3. The previous absorption cooling and heating units allowed the heating water to pass through the absorber 1 before entering the condenser 3, resulting in a large pressure loss of the heating water. Therefore, it is necessary to configure a higher-pressure heating water pump in the user system. The higher-pressure heating water pump consumes a lot of electricity, which leads to a high cost of using the unit. In comparison, since the heating water in this application does not pass through the absorber 1, the pressure loss of the heating water is small. Therefore, a lower-pressure heating water pump configured in the user system can meet the heating demand, thereby reducing the cost of using the unit.

[0030] Specifically, the heating water outlet pipe 16 can be connected to the cooling water pipe 13 and the connection position is located downstream of the condenser 3. The heating water inlet pipe 15 and the heating water outlet pipe 16 are connected to the cooling water pipe 13. In this way, in the heating mode, the heating water flows through part of the cooling water pipe 13, so that part of the cooling water pipe 13 is used as a flow channel for cooling water and a flow channel for heating water, which can be used for multiple purposes, saving the pipe configuration cost and reducing the production cost of the unit.

[0031] Specifically, a valve (indicated by 35 in the figure) is provided on the heating water inlet pipe 15, and a valve (indicated by 36 in the figure) is provided on the heating water outlet pipe 16. In the heating mode, the valves 35 and 36 are opened. In the cooling mode, the valves 35 and 36 are closed.

[0032] Specifically, a valve member (indicated by 26 in the figure) is provided upstream of the absorber 1 on the cooling water pipeline 13, a valve member (indicated by 24 in the figure) is provided between the absorber 1 and the position connected to the heating water inlet pipeline 15 on the cooling water pipeline 13, and a valve member (indicated by 23 in the figure) is provided downstream of the position connected to the heating water outlet pipeline 16 on the cooling water pipeline 13. In the cooling mode, the valve member indicated by 26, the valve member indicated by 24, and the valve member indicated by 23 are all open. In the heating mode, the valve member indicated by 26, the valve member indicated by 24, and the valve member indicated by 23 are all closed.

[0033] Specifically, the generator 4 includes a liquid distribution device, and the outlet of the refrigerant pump 7 is connected to the liquid distribution device of the generator 4. The liquid distribution device can be a spray device, which has a flow channel plate and a nozzle, and the nozzle is installed at the liquid outlet of the flow channel plate. In this way, in the heating mode, the refrigerant can be distributed in the generator 4 through the nozzle in a spraying manner, and the liquid distribution has good uniformity and high heat exchange efficiency with the heat source (higher than the heat exchange efficiency of the dripping liquid distribution, the dripping liquid distribution means that the droplets directly drip from the liquid outlet of the flow channel plate), so that the heating effect is good and is not affected by the installation level.

[0034] Specifically, the absorption cooling and heating unit includes a dilute absorption liquid pipeline, on which a valve (indicated by 22 in the figure) and a dilute absorption liquid pump 5 are provided. In the cooling mode, the dilute absorption liquid in the absorber 1 can enter the generator 4 through the dilute absorption liquid pipeline under the pumping action of the dilute absorption liquid pump 5. It also includes a concentrated absorption liquid pipeline, on which a valve (indicated by 25 in the figure) and a concentrated absorption liquid pump 6 are provided. In the cooling mode, the concentrated absorption liquid in the generator 4 can return to the absorber 1 through the concentrated absorption liquid pipeline under the pumping action of the concentrated absorption liquid pump 6.

[0035] Specifically, the absorption cooling and heating unit includes a refrigerant inlet pipeline 14 connected to the outlet of the refrigerant pump 7, and the outlet of the refrigerant inlet pipeline 14 is connected to the dilute absorption liquid pipeline and the connection position is located downstream of the valve member on the dilute solution absorption pipeline. A valve member (indicated by 32 in the figure) is provided on the refrigerant inlet pipeline 14. In the heating mode, the refrigerant can enter the generator 4 through the refrigerant inlet pipeline 14 under the pumping action of the refrigerant pump 7. Let the refrigerant inlet pipeline 14 be connected to the dilute absorption liquid pipeline. In this way, in the heating mode, the refrigerant flows through part of the dilute absorption liquid pipeline, so that part of the dilute absorption liquid pipeline is used not only as a flow channel for the dilute absorption liquid but also as a flow channel for the refrigerant, so that one thing can be used for multiple purposes, saving the pipeline configuration cost and reducing the unit production cost.

[0036] Specifically, the absorption cooling and heating unit includes a first refrigerant outlet pipeline 10. In the heating mode, the liquid refrigerant in the condenser 3 can flow back to the refrigerant container 9 through the first refrigerant outlet pipeline 10. A valve (indicated by 34 in the figure) is provided on the first refrigerant outlet pipeline 10.

[0037] Specifically, the tubes of the absorber 1 and the evaporator 2 can be arranged in the same cylinder, separated by a baffle, and a structure for circulating refrigerant vapor is provided on the baffle. The tubes of the generator 4 and the condenser 3 can be arranged in the same cylinder, separated by a baffle, and a structure for circulating refrigerant vapor is provided on the baffle.

[0038] Specifically, the absorption cooling and heating unit includes a second refrigerant outlet pipeline 19. In the heating mode, the liquid refrigerant in the generator 4 can flow back to the refrigerant container 9 through the second refrigerant outlet pipeline 19. A valve (indicated by 33 in the figure) is provided on the second refrigerant outlet pipeline 19.

[0039] The following comparison Figure 2 and Figure 3 Detailed description of the working process in cooling mode and heating mode:

[0040] like Figure 2 As shown, in the cooling mode, the valves indicated by 21, 22, 23, 24, 25, and 26 are open, and the valves indicated by 31, 32, 33, 34, 35, and 36 are closed. The heat source enters the generator 4 through the heat source inlet pipe 17, and cooling water is passed through the cooling water pipe 13. Cold water is passed into the evaporator 2 through the cold water inlet pipe 11. In the generator 4, the dilute absorption liquid absorbs the heat of the heat source and evaporates the refrigerant vapor to become a concentrated absorption liquid. The heat source after cooling is discharged through the heat source outlet pipe 18. The concentrated absorption liquid returns to the absorber 1 under the action of the concentrated absorption liquid pump 6, and the refrigerant vapor enters the condenser 3. In the absorber 1, the concentrated absorption liquid absorbs the refrigerant vapor from the evaporator 2 to become a dilute absorption liquid. The dilute absorption liquid enters the generator 4 under the action of the dilute absorption liquid pump 5, thereby forming an absorption liquid cycle. The concentrated absorption liquid and the dilute absorption liquid exchange heat in the heat exchanger 8. In the condenser 3, the refrigerant vapor exchanges heat with the cooling water and condenses into liquid refrigerant before entering the evaporator 2. In the evaporator 2, the liquid refrigerant absorbs the heat of the cold water to generate refrigerant vapor and goes to the absorber 1. The cooled cold water goes to the user system through the cold water outlet pipe 12. The refrigerant pump 7 pumps the refrigerant from the bottom of the evaporator 2 to the top of the evaporator 2 to improve the heat exchange effect between the refrigerant and the cold water.

[0041] like Figure 3As shown, in the heating mode, the valves indicated by 31, 32, 33, 34, 35, and 36 are opened, and the valves indicated by 21, 22, 23, 24, 25, and 26 are closed, and the heat source enters the generator 4 through the heat source inlet pipe 17, and the refrigerant pump 7 pumps the refrigerant from the refrigerant container 9 to the generator 4, and the heating water is introduced into the condenser 3 through the heating water inlet pipe 15. In the generator 4, the refrigerant absorbs the heat from the heat source to form refrigerant vapor and then enters the condenser 3. In the condenser 3, the refrigerant vapor heats the heating water and condenses it into liquid refrigerant, and the heated heating water goes to the user system through the heating water outlet pipe 16. The liquid refrigerant in the condenser 3 flows back to the refrigerant container 9 through the first refrigerant outlet pipe 10. The liquid refrigerant at the bottom of the generator 4 flows back to the refrigerant container 9 through the second refrigerant outlet pipe 19.

[0042] In summary, in the present application, in the cooling mode, the refrigerant pump 7 can pump the refrigerant from the bottom of the evaporator 2 to the top of the evaporator 2, and in the heating mode, the refrigerant pump 7 can pump the refrigerant from the refrigerant container 9 to the generator 4. The cooling mode and the heating mode share the same refrigerant pump 7, thereby saving production costs. In addition, in the heating mode, the heating water does not enter the condenser 3 through the absorber 1, which reduces the pressure loss of the heating water, allowing the user system to be configured with a lower pressure heating water pump, thereby saving the cost of use. In addition, in the heating mode, the refrigerant is distributed in the generator 4 in a spraying manner, and the distribution uniformity is good, thereby improving the heating effect.

[0043] The above specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. An absorption cooling and heating unit, characterized in that: The absorption cooling and heating unit includes an evaporator, an absorber, a generator, a condenser, a refrigerant pump and a refrigerant container. The inlet of the refrigerant pump is connected to the bottom of the evaporator and the refrigerant container, and the outlet of the refrigerant pump is connected to the top of the evaporator and the generator.

2. The absorption cooling and heating unit according to claim 1, characterized in that: A valve is provided on a communication pipeline between the inlet of the refrigerant pump and the bottom of the evaporator, and a valve is provided on a communication pipeline between the inlet of the refrigerant pump and the refrigerant container.

3. The absorption cooling and heating unit according to claim 1, characterized in that: The absorption cooling and heating unit includes a cooling water pipeline and a heating water inlet pipeline. The absorber is connected to the cooling water pipeline, the condenser is connected to the cooling water pipeline and is located downstream of the absorber, and the heating water inlet pipeline is connected to the cooling water pipeline and the connection position is located downstream of the absorber and upstream of the condenser, so that the heating water enters the condenser without passing through the absorber.

4. The absorption cooling and heating unit according to claim 3, characterized in that: The absorption cooling and heating unit comprises a heating water outlet pipeline, which is connected to the cooling water pipeline and the connection position is located downstream of the condenser.

5. The absorption cooling and heating unit according to claim 4, characterized in that: The heating water inlet pipe is provided with a valve, and the heating water outlet pipe is provided with a valve.

6. The absorption cooling and heating unit according to claim 4, characterized in that: Valves are provided on the cooling water pipeline upstream of the absorber, between the absorber and the position connected to the heating water inlet pipeline, and downstream of the position connected to the heating water outlet pipeline.

7. The absorption cooling and heating unit according to any one of claims 1 to 6, characterized in that: The generator includes a spray device, and the outlet of the refrigerant pump is specifically connected to the spray device of the generator, so that the refrigerant is distributed in the generator in a spraying manner.

8. The absorption cooling and heating unit according to any one of claims 1 to 6, characterized in that: The absorption cooling and heating unit includes a dilute absorption liquid pipeline connected between the absorber and the generator, the dilute absorption liquid pipeline is provided with a valve and a dilute absorption liquid pump, and also includes a refrigerant inlet pipeline connected to the outlet of the refrigerant pump, the outlet of the refrigerant inlet pipeline is connected to the dilute absorption liquid pipeline and the connection position is located downstream of the valve on the dilute absorption liquid pipeline, and the refrigerant inlet pipeline is provided with a valve.

9. The absorption cooling and heating unit according to any one of claims 1 to 6, characterized in that: The absorption cooling and heating unit comprises a first refrigerant outlet pipeline. In the heating mode, the liquid refrigerant in the condenser can flow back to the refrigerant container through the first refrigerant outlet pipeline. A valve is provided on the first refrigerant outlet pipeline.

10. The absorption cooling and heating unit according to any one of claims 1 to 6, characterized in that: The absorption cooling and heating unit includes a second refrigerant outlet pipeline. In the heating mode, the liquid refrigerant at the bottom of the generator can flow back to the refrigerant container through the second refrigerant outlet pipeline. A valve is provided on the second refrigerant outlet pipeline.

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