CN219199541U

CN219199541U - Heat-cold mutual coupling direct-fired lithium bromide absorption type cold and hot water unit

Info

Publication number: CN219199541U
Application number: CN202223255154.4U
Authority: CN
Inventors: 张长江; 陈荣霞
Original assignee: Shuangliang Eco Energy Systems Co Ltd
Current assignee: Shuangliang Eco Energy Systems Co Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-06-16
Anticipated expiration: 2032-12-06

Abstract

The utility model relates to the technical field of air conditioning equipment, in particular to a heat-cold cross-coupling direct-combustion lithium bromide absorption type cold-hot water unit, which comprises an evaporator, an absorber, a direct-combustion generator, a condenser, a solution heat exchanger, a solution pump and a refrigerant pump, wherein the evaporator is connected with the absorber; the cold water inlet pipe and the cold water outlet pipe are connected with the internal heat exchange pipe of the evaporator, and the internal heat exchange pipe of the evaporator is connected with the cold water inlet pipe and the cold water outlet pipe which are used for cooling and are used for maintaining the working temperature of the absorber on the unit. The utility model can be used in the industrial application field which always needs to supply cold and heat simultaneously and the cold and heat load needs to be adjusted and controlled in the same direction.

Description

Heat-cold mutual coupling direct-fired lithium bromide absorption type cold and hot water unit

Technical Field

The utility model relates to the technical field of air conditioning equipment, in particular to a heat-cold mutual coupling direct combustion type lithium bromide absorption type cold and hot water unit.

Background

As shown in fig. 1, a conventional direct-fired lithium bromide absorption type hot and cold water machine set is composed of an evaporator 4, an absorber 1, a direct-fired generator 9 (also called a direct-fired high-pressure generator in a double-effect type refrigerating machine set), a low-pressure generator 23, a condenser 11, a low-temperature heat exchanger 20, a high-temperature heat exchanger 21, a solution pump 5, a refrigerant pump 2, a control system (not shown), and pipes and valves connecting the respective components. The evaporator 4 is connected with an evaporator water inlet pipe 25 and an evaporator water outlet pipe 24; the solution switching valve 19 is arranged on the pipeline between the liquid outlet pipe 7 of the direct-fired generator 9 and the absorber 1, and the steam switching valve 22 is arranged on the pipeline between the refrigerant steam outlet pipe of the direct-fired generator 9, namely the refrigerant steam pipe 10 and the evaporator 4, so that the unit can be a cold and hot water unit, and can operate according to a refrigerating working condition or a heating working condition to provide cold water and hot water for an air conditioner or a process. During refrigerating operation of the unit, the solution switching valve 19 and the steam switching valve 22 are closed, the evaporator water inlet pipe 25 serves as a cold water inlet pipe of the unit, and the evaporator water outlet pipe 24 serves as a cold water outlet pipe of the unit. During heating operation of the unit, the solution switching valve 19 and the steam switching valve 22 are opened, the refrigerant pump 2 stops, the evaporator water inlet pipe 25 serves as a hot water inlet pipe of the unit, and the evaporator water outlet pipe 24 serves as a hot water outlet pipe of the unit. The refrigerating and heating of the machine set can only be switched to operate, and can not simultaneously supply cold and heat, thus being applicable to places for cooling in summer and heating in winter.

As shown in fig. 2, a conventional cold and hot combined supply direct combustion lithium bromide absorption type cold and hot water unit is composed of an evaporator 4, an absorber 1, a direct combustion generator 9, a hot water heat exchanger 26, a low pressure generator 23, a condenser 11, a low temperature heat exchanger 20, a high temperature heat exchanger 21, a solution pump 5, a refrigerant pump 2, a control system (not shown in the figure), and pipes and valves connecting the respective components. The unit is formed by eliminating the solution switching valve 19 and the steam switching valve 22 and adding the hot water heat exchanger 26 and the related stop valve and the switching valve on the basis of the unit shown in fig. 1, and can be used for independently refrigerating and independently supplying heat, and can also be used for simultaneously refrigerating and supplying heat. When the unit is used for simultaneously refrigerating and heating, the refrigerating capacity and the heating capacity can only be reversely regulated and controlled, and cannot be synchronously increased and reduced in the same direction, so that the unit is suitable for independent cooling in summer and independent heating in winter, and is not suitable for the industrial application fields of high-grade hotels and restaurants which need simultaneous cooling and heating in autumn, winter and winter transition seasons, and are always required to be simultaneously cooled and heated, and the cooling and heating loads need to be regulated and controlled in the same direction.

Disclosure of Invention

The utility model aims to overcome the defects, and the traditional direct-fired lithium bromide absorption type cold and hot water unit is provided with a low-pressure generator, a solution switching valve and a steam switching valve, wherein a solution heat exchanger is used for replacing a high-temperature heat exchanger and a low-temperature heat exchanger, and a condenser is used as a hot water heat exchanger for heat supply. When the unit operates, the evaporator is used for refrigerating, the condenser is used for heating, the refrigerating capacity and the heating capacity are mutually coupled and symbiotic and synchronous in the same direction, so that the simultaneous refrigerating and heating are realized, the comprehensive energy efficiency of refrigerating and heating is improved, and the efficient energy-saving equipment is provided for the industrial application field requiring simultaneous refrigerating and heating.

A heat-cold cross-coupling direct-combustion lithium bromide absorption type cold-hot water unit comprises an evaporator, an absorber, a direct-combustion generator, a condenser, a solution heat exchanger, a solution pump and a refrigerant pump; the cold water cooling device comprises a condenser, a direct-fired generator, a cold water inlet pipe, a cold water outlet pipe and a cold water outlet pipe, wherein the cold water steam outlet of the direct-fired generator is directly connected with the condenser through a cold water steam pipe, the internal heat exchange pipe of the absorber is connected with the cold water inlet pipe and the cold water outlet pipe which are used for maintaining the working temperature of the absorber on a unit, the internal heat exchange pipe of the condenser is connected with the hot water inlet pipe and the hot water outlet pipe which are used for supplying heat on the unit, and the internal heat exchange pipe of the evaporator is connected with the cold water inlet pipe and the cold water outlet pipe which are used for supplying cold on the unit.

Through the design scheme of the heat-cold mutual coupling direct-fired lithium bromide absorption type cold and hot water unit, when the unit operates, the condenser can be used for supplying heat, meanwhile, the evaporator is used for refrigerating, and only the absorbed heat of the absorber needs to be discharged into the atmosphere through cooling water.

The heat-cold mutual coupling direct combustion lithium bromide absorption type hot and cold water unit also comprises a control system (not shown in the figure) and pipelines and valves connected with related components.

In the utility model, the evaporator and the absorber are arranged in the same cylinder.

Preferably, a pair of heat exchange tubes positioned at the left side and the right side of the heat exchange tube in the evaporator are arranged in the absorber, and the heat exchange tubes in the absorber are respectively separated from the heat exchange tube in the evaporator through a heat insulation ventilation layer.

Preferably, the upper end and the lower end of a pair of heat exchange tubes in the evaporator are connected in parallel through a connecting pipeline and then connected with the cooling water inlet tube and the cooling water outlet tube on the unit.

In the utility model, a refrigerant water tray is arranged at the bottom of the evaporator, a refrigerant pump is connected to the refrigerant water tray, a refrigerant water spray pipe is arranged at the upper part of the evaporator, and the refrigerant pump is connected with the refrigerant water spray pipe at the upper part of the evaporator through a connecting pipeline.

In the utility model, a pair of shower plates are correspondingly arranged above the pair of heat exchange tubes in the absorber, a pair of shower pipes are correspondingly arranged above the pair of shower plates, and the pair of shower pipes are connected with the upper part of the solution of the direct-fired generator through a solution shower pipeline.

In the utility model, the bottom of the absorber is provided with a solution collecting disc, the solution collecting disc is connected with a solution pump, and the solution pump is connected to the upper part of the solution of the direct-fired generator through a solution conveying pipeline.

In the utility model, a solution heat exchanger is arranged between the solution spraying pipeline and the solution conveying pipeline; the bottom of the liquid bag of the condenser is connected into the evaporator through a U-shaped pipe.

In the utility model, the direct-fired generator is provided with a burner.

In the present utility model, the cooling water inlet pipe and the cooling water outlet pipe are connected to an external cooling tower to maintain the operating temperature of the absorber.

The beneficial effects of the utility model are as follows:

through with direct-fired generator's in the unit refrigerant steam export with directly link to each other through the refrigerant steam pipe between the condenser, hot water inlet pipe and hot water outlet pipe connect to the condenser, the cooling water outlet pipe connects to the absorber for when the unit is in operation, can use the evaporimeter to refrigerate, with the heat supply of condensation of condenser, only the heat of absorption of absorber needs to be discharged into the atmosphere through the cooling water, thereby not only realized the simultaneous refrigeration of unit, heat supply, improved the comprehensive energy efficiency of unit refrigeration, heat supply moreover, provide a high-efficient energy-saving equipment for the industrial application field that needs simultaneously cooling, heat supply.

Drawings

Fig. 1 is a schematic structural diagram of a conventional direct-fired lithium bromide absorption type cold and hot water unit.

Fig. 2 is a schematic structural diagram of a conventional cold and hot water unit with direct-fired lithium bromide absorption.

Fig. 3 is a schematic diagram of a heat-cold mutual coupling direct-fired lithium bromide absorption type hot and cold water unit structure according to the utility model.

In the figure: 1-absorber, 2-refrigerant pump, 3-refrigerant water tray, 4-evaporator, 5-solution pump, 6-solution heat exchanger, 7-direct fired generator outlet pipe, 8-burner, 9-direct fired generator, 10-refrigerant steam pipe, 11-condenser, 12-hot water outlet pipe, 13-hot water inlet pipe, 14-cooling water outlet pipe, 15-refrigerant water U-shaped pipe, 16-cold water outlet pipe, 17-cold water inlet pipe, 18-cooling water inlet pipe, 19-solution switching valve, 20-low temperature heat exchanger, 21-high temperature heat exchanger, 22-steam switching valve, 23-low pressure generator, 24-evaporator outlet pipe, 25-evaporator inlet pipe, 26-hot water heat exchanger, 27-solution collecting tray, 28-solution spray pipe, 29-solution delivery pipe.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

Referring to fig. 3, an embodiment of a heat-cold cross-coupling direct-fired lithium bromide absorption type cold-hot water unit of the utility model comprises an evaporator 4, an absorber 1, a direct-fired generator 9, a condenser 11, a solution heat exchanger 6, a solution pump 5 and a refrigerant pump 2; the refrigerant steam outlet of the direct-fired generator 9 is directly connected with the condenser 11 through a refrigerant steam pipe 10, the internal heat exchange pipe of the absorber 1 is connected with a cooling water inlet pipe 18 and a cooling water outlet pipe 14 which are arranged on a unit and used for maintaining the working temperature of the absorber 1, the internal heat exchange pipe of the condenser 11 is connected with a hot water inlet pipe 13 and a hot water outlet pipe 12 which are arranged on the unit and used for supplying heat, and the internal heat exchange pipe of the evaporator 4 is connected with a cold water inlet pipe 17 and a cold water outlet pipe 16 which are arranged on the unit and used for supplying cold.

Through the design scheme of the heat-cold mutual coupling direct-fired lithium bromide absorption type cold and hot water unit, when the unit operates, the condenser 11 can be used for supplying heat, meanwhile, the evaporator 4 is used for refrigerating, and only the absorbed heat of the absorber 1 needs to be discharged into the atmosphere through cooling water.

In this embodiment, the evaporator 4 and the absorber 1 are disposed in the same cylinder.

Preferably, a pair of heat exchange tubes positioned at the left and right sides of the inner heat exchange tube of the evaporator 4 are arranged in the absorber 1, and the pair of heat exchange tubes in the absorber 1 are respectively separated from the inner heat exchange tube of the evaporator 4 by a heat insulation ventilation layer.

Preferably, the upper and lower ends of the pair of heat exchange tubes inside the evaporator 4 are connected in parallel through a connecting pipeline and then connected with the cooling water inlet pipe 18 and the cooling water outlet pipe 14 on the unit.

In this embodiment, the bottom of the evaporator 4 is provided with a refrigerant water tray 3, the refrigerant water tray 3 is connected with a refrigerant pump 2, the upper portion of the evaporator 4 is provided with a refrigerant water spray pipe, and the refrigerant pump is connected with the upper portion refrigerant water spray pipe of the evaporator 4 through a connecting pipeline.

In this embodiment, a pair of shower plates are correspondingly disposed above the pair of heat exchange tubes in the absorber 1, and a pair of shower pipes are correspondingly disposed above the pair of shower plates, and are connected with the upper part of the solution of the direct-fired generator 9 through a solution shower pipeline 28.

In this embodiment, a solution collecting tray is disposed at the bottom of the absorber 1, a solution pump 5 is connected to the solution collecting tray 27, and the solution pump 5 is connected to the upper part of the solution of the direct-fired generator 9 through a solution delivery pipe 29.

In this embodiment, a solution heat exchanger 6 is disposed between the solution spray line 28 and the solution delivery line 29; the bottom of the liquid sac of the condenser 11 is connected into the evaporator 4 through a U-shaped pipe.

In this embodiment, the direct-fired generator 9 is provided with a burner.

In this embodiment, the cooling water inlet pipe 18 and the cooling water outlet pipe 14 are connected to an external cooling tower to maintain the operating temperature of the absorber 1.

When the unit operates, high-temperature refrigerant steam generated in the direct-fired generator 9 enters the condenser 11 through the refrigerant steam pipe 10, hot water flowing through the heat exchange pipe of the condenser 11 is heated to supply heat to the outside, the high-temperature refrigerant steam releases heat and is condensed into high-temperature refrigerant water, the high-temperature refrigerant water enters the evaporator 4 through the refrigerant water U-shaped pipe 15 to be flash-cooled and then enters the refrigerant water tray 3, and then is pumped out by the refrigerant pump 2 and sprayed onto the heat exchange pipe bundle of the evaporator 4 to perform evaporation refrigeration, so that the unit realizes simultaneous refrigeration and heat supply. At the same time, cooling water enters the heat exchange tube of the absorber 1 through the cooling water inlet tube 18, cools down the absorber 1 to maintain the working temperature of the absorber 1, and then exits the unit through the cooling water outlet tube 14, and the absorbed heat is discharged into the atmosphere through the external cooling tower.

Wherein the unit is operated with the heating load and the hot water outlet temperature as control targets, the refrigerating capacity can be obtained through the evaporator 4. Also, when the unit is operated with the cooling load and the cold water outlet temperature as control targets, the heat supply amount can be obtained through the condenser 11. The refrigerating capacity and the heating capacity are in a mutual coupling symbiotic relation, can be synchronously and equidirectionally regulated and controlled, and only the absorbed heat of the absorber 1 needs to be discharged into the atmosphere through cooling water, so that the simultaneous refrigeration and the heating are realized, the comprehensive energy efficiency of the refrigeration and the heating is improved, and the energy can be saved by more than 15 percent compared with a direct-fired lithium bromide absorption refrigerator (the performance coefficient is 1.45) with the same refrigerating capacity and a gas hot water boiler with the same heating capacity (the heat efficiency is 96 percent).

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. The utility model provides a hot and cold cross-coupling direct combustion formula lithium bromide absorption formula hot and cold water unit, includes evaporimeter (4), absorber (1), direct combustion type generator (9), condenser (11), solution heat exchanger (6), solution pump (5) and refrigerant pump (2), its characterized in that: the cold steam outlet of the direct-fired generator (9) is directly connected with the condenser (11) through a cold steam pipe (10), the internal heat exchange pipe of the absorber (1) is connected with a cooling water inlet pipe (18) and a cooling water outlet pipe (14) which are used for maintaining the working temperature of the absorber (1) on a unit, the internal heat exchange pipe of the condenser (11) is connected with a hot water inlet pipe (13) and a hot water outlet pipe (12) which are used for supplying heat on the unit, and the internal heat exchange pipe of the evaporator (4) is connected with a cold water inlet pipe (17) and a cold water outlet pipe (16) which are used for supplying cold on the unit.

2. The heat-cold mutual coupling direct-fired lithium bromide absorption type cold and hot water unit according to claim 1, wherein the evaporator (4) and the absorber (1) are arranged in the same cylinder.

3. The heat-cold cross-coupling direct-fired lithium bromide absorption type hot and cold water unit according to claim 2, wherein a pair of heat exchange tubes positioned at the left side and the right side of the heat exchange tube in the evaporator (4) are arranged in the absorber (1), and the heat exchange tubes in the absorber (1) are mutually separated from the heat exchange tube in the evaporator (4) through heat insulation ventilation layers respectively.

4. A heat-cold cross-coupling direct-fired lithium bromide absorption type hot and cold water unit according to claim 3, wherein the upper and lower ends of a pair of heat exchange tubes inside the evaporator (4) are connected in parallel through a connecting pipeline and then connected with the cooling water inlet pipe (18) and the cooling water outlet pipe (14) on the unit.

5. The heat-cold cross-coupling direct-fired lithium bromide absorption type cold and hot water unit according to claim 3, wherein a cold water tray (3) is arranged at the bottom of the evaporator (4), a cold water pump (2) is connected to the cold water tray (3), a cold water spray pipe is arranged at the upper part of the evaporator (4), and the cold water pump is connected with the cold water spray pipe at the upper part of the evaporator (4) through a connecting pipeline.

6. A heat-cold cross-coupling direct-fired lithium bromide absorption type hot and cold water unit according to claim 3, wherein a pair of shower plates are correspondingly arranged above the pair of heat exchange tubes in the absorber (1), a pair of shower pipes are correspondingly arranged above the pair of shower plates, and the pair of shower pipes are connected with the upper part of the solution of the direct-fired generator (9) through a solution shower pipeline (28).

7. The heat-cold cross-coupling direct-fired lithium bromide absorption hot and cold water unit according to claim 6, wherein a solution collecting tray is arranged at the bottom of the absorber (1), a solution pump (5) is connected to the solution collecting tray (27), and the solution pump (5) is connected to the upper part of the solution of the direct-fired generator (9) through a solution conveying pipeline (29).

8. A hot and cold cross-coupling direct-fired lithium bromide absorption chiller-heater unit according to claim 7 characterized in that a solution heat exchanger (6) is arranged between the solution spray line (28) and the solution delivery line (29); the bottom of the liquid sac of the condenser (11) is connected into the evaporator (4) through a U-shaped pipe.

9. A hot and cold cross-coupled direct-fired lithium bromide absorption chiller-heater unit according to claim 3 wherein the cooling water inlet pipe (18) and cooling water outlet pipe (14) are connected to an external cooling tower to maintain the operating temperature of the absorber (1).