CN114593476A - Solar refrigeration air-conditioning system and working method thereof - Google Patents

Abstract

The invention discloses a solar energy refrigeration and air conditioning system, comprising a solar water heating system, a compression refrigeration system, an adsorption refrigeration system and a circulating water system. The outlet of the refrigeration compressor is connected to the inlet of a first condenser, and the outlet of the first condenser is connected to The inlet of the subcooler, the outlet of the subcooler is connected to the inlet of the first evaporator through the throttle valve, the outlet of the first evaporator is connected to the inlet of the refrigeration compressor, and the outlet of the circulating working fluid of the first adsorber and the second adsorber is connected to the regenerator Connect the inlet of the second condenser, the outlet of the second condenser is connected to the inlet of the second water pump through the liquid storage tank, the outlet of the second water pump is connected to the inlet of the subcooler one way, and the other way is connected to the inlet of the second evaporator, and the outlet of the subcooler is connected to the first The outlets of the two evaporators are commonly connected to the inlets of the circulating working medium of the first adsorber and the second adsorber. The invention increases the subcooling degree of the compression refrigeration system, improves the refrigeration coefficient, and simultaneously adopts the adsorption system to assist the refrigeration, thereby reducing the cooling load of the compression refrigeration system.

Description

A solar refrigeration and air conditioning system and its working method

technical field

The invention belongs to the technical field of air conditioning and refrigeration, and in particular relates to a new composite solar refrigeration and air conditioning system using a solar water heating system, an adsorption refrigeration system and a compression refrigeration system and a working method thereof.

Background technique

At present, energy and environmental problems have become urgent life and survival problems. With the rapid development of air-conditioning and refrigeration technology, the current requirements for air-conditioning and refrigeration technology in the industry are not only to meet refrigeration needs, but to propose energy saving, environmental protection, Combined with higher-level requirements such as new energy technology. At present, air-conditioning refrigeration systems are mainly compression refrigeration systems and adsorption refrigeration systems. The development of the compression refrigeration system is relatively mature. It is mainly composed of a compressor, a condenser, a throttle valve, an evaporator, etc. The heat of the condenser is directly discharged to the environment without being recycled. The adsorption refrigeration system is in the initial stage of development. It is mainly composed of an adsorber, a condenser, a liquid storage tank, a throttle valve, an evaporator, etc. However, the adsorption refrigeration system has a low cooling coefficient and has not been widely used.

At present, there are few systems that combine adsorption refrigeration technology, new energy technology and vapor compression refrigeration technology. How to organically combine the above technologies to reduce the energy consumption of air conditioning coefficients and improve the refrigeration coefficient of the system is an urgent need for future technological development.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a new type of solar refrigeration and air conditioning system and its working method in view of the above problems and deficiencies in the prior art.

For realizing the purpose of the present invention, the technical scheme adopted in the present invention is:

A solar refrigeration and air conditioning system, including a solar water heating system, a compression refrigeration system, an adsorption refrigeration system and a circulating water system, the solar water heating system includes a solar heat collector 16, a hot water tank 17, and a first water pump 18 , a first heat exchanger 19; the compression refrigeration system includes a refrigeration compressor 11, a first condenser 12, a subcooler 8, a throttle valve 9, and a first evaporator 10; the adsorption refrigeration system includes The first adsorber 1, the second adsorber 2, the second heat exchanger 3, the second condenser 4, the liquid storage tank 5, the second water pump 6, the second evaporator 7, the first electronic expansion valve 28, the second Electronic expansion valve 29; the circulating water system includes a third water pump 15, a regenerator 13, and a cooler 14;

In the solar hot water system, the outlet of the solar collector 16 is connected to the inlet of the hot water tank 17 through a pipeline, the outlet of the hot water tank 17 is connected to the inlet of the first water pump 18 through a pipeline, and the outlet of the first water pump 18 is connected to the first heat exchange through a pipeline. The upper inlet a1 of the heat exchanger 19, the upper outlet a2 of the first heat exchanger 19 is connected to the inlet of the solar collector 16 through pipes;

In the compression refrigeration system, the outlet of the refrigeration compressor 11 is connected to the lower inlet g1 of the first condenser 12 through a pipeline, and the lower outlet g2 of the condenser 12 is connected to the inlet f1 of the subcooler 8 through a pipeline, and the outlet f2 of the subcooler 8 The inlet of the throttle valve 9 is connected through a pipeline, and the outlet of the throttle valve 9 is connected to the inlet of the refrigeration compressor 10 through a pipeline;

In the adsorption refrigeration system, the refrigerant outlet k3 at the top of the first adsorber 1 is connected to the second adsorber through the first cut-off valve 26 and the refrigerant outlet n3 at the top of the second adsorber 2 through the second cut-off valve 27. The lower inlet d1 of the heat exchanger 3 and the lower outlet d2 of the second heat exchanger 3 are connected to the inlet of the second condenser 4 through pipes, and the outlet of the second condenser 4 is connected to the inlet of the liquid storage tank 5 through pipes, and the liquid storage tank The outlet of 5 is connected to the inlet of the second water pump 6 through the pipeline, and the outlet of the second water pump 6 is connected to the inlet of the second evaporator 7 through the pipeline through the first electronic expansion valve 28 and the second electronic expansion valve 29 in turn. The outlet of 7 is connected to the outlet e2 of the subcooler 8 and is divided into two paths, one of which is connected to the refrigerant inlet n2 of the second adsorber 2 through the third cut-off valve 31, and the other is connected to the first adsorption through the fourth cut-off valve 32. The refrigerant inlet k2 of the device 1;

In the circulating water system, the circulating water outlet k4 of the first adsorber 1 is connected to the inlet of the third water pump 15 through a pipeline, and the outlet of the third water pump 15 is connected to the first condenser through the first electric four-way reversing valve 20. The upper inlet h1 of 12 and the upper outlet h2 of the second condenser 12 are connected to the inlet i1 of the regenerator 13 through pipes, and the outlet i2 of the second heat exchanger 13 is connected to the upper inlet c1 of the second heat exchanger 3 through pipes. The upper outlet c2 of the second heat exchanger 3 is connected to the inlet b1 of the first heat exchanger 19 through a pipeline, and the outlet b2 of the first heat exchanger 19 is connected to the circulating water inlet of the second adsorber 2 through the second electric four-way reversing valve 21 n1, the circulating water outlet n4 of the second adsorber 2 is connected to the inlet j1 of the second heat exchanger 13 through the first electric four-way reversing valve 20, and the outlet j2 of the second heat exchanger 13 is connected to the cooler 14 through pipes. The inlet, the outlet of the cooler 14 is connected to the circulating water inlet k1 of the first adsorber 1 through the second electric four-way reversing valve 21 .

Further preferably, a subcooler 8 is provided between the outlet of the first electronic expansion valve 28 and the outlet of the second evaporator 7, and a fifth cutoff is provided before the outlet of the first electronic expansion valve 28 and the inlet e1 of the subcooler 8 valve 30.

Further preferably, the first water pump 18 is a variable frequency pump.

Further preferably, a first temperature sensor 22 is provided on the pipeline between the outlet of the cooler 14 and the inlet of the second electric four-way regulating valve 21, and the first temperature sensor 22 is connected to the fan of the cooler 14 through a wire; A second temperature sensor 23 is provided on the pipeline between the outlet b2 of the heat exchanger 19 and the inlet of the second electric four-way regulating valve 21 , and the second temperature sensor 23 is connected to the first water pump 18 through a wire; the outlet of the second condenser 4 A third temperature sensor 24 is provided on the pipeline between the inlet of the liquid storage tank 5, and the third temperature sensor 24 is connected to the fan of the second condenser 4 through a wire; the outlet of the second evaporator 7 is provided with a fourth temperature sensor 25 , the fourth temperature sensor 25 is connected to the first electronic expansion valve 28 and the second electronic expansion valve 29 through wires.

A working method of a new type of solar refrigeration and air-conditioning system has two working modes, and the details are as follows:

1. The first adsorber 1 is adsorbed, and the second adsorber 2 is desorbed:

Open the second shut-off valve 27, the fifth shut-off valve 30, the fourth shut-off valve 32, the first electronic expansion valve 28, the second electronic expansion valve 29, the first four-way regulating valve 20, the second four-way regulating valve 21, and the At the same time, open the first water pump 18, the second water pump 6, the third water pump 15, the refrigeration compressor 11, and the other valves are closed; The gaseous refrigerating working medium then enters the condenser 12 to release heat and condense, and the liquefied refrigerating working medium enters the subcooler 8 to further release heat. The evaporator 10, after the heat absorbed by the air in the first evaporator 10 is changed back to the low-temperature and low-pressure gaseous refrigerant working medium, enters the refrigeration compressor 11 for the next cycle;

In the solar hot water system, cold water enters the solar collector plate 16 to be heated and heated to become high-temperature hot water, the high-temperature hot water enters the hot water tank 17 for storage, and the high-temperature hot water in the water tank is pressurized by the first water pump 18 and then enters the A heat exchanger 19 performs heat exchange, and the low-temperature water flowing out from the upper outlet a2 of the first heat exchanger 19 enters the solar heat collector 16 again for heating and heating;

In the above-mentioned adsorption refrigeration system, the adsorbent in the second adsorber 2 absorbs heat and heats up to carry out the desorption process, and the gaseous refrigerant flows out from the top outlet n3, and then enters the second exchange through the second cut-off valve 27. The heat is released in the heater 3 to cool down, and the preliminarily cooled refrigerant enters the second condenser 4 to be further cooled into a liquid refrigerant, and then enters the liquid storage tank 5 for storage. The second water pump 6 refrigerates the liquid in the liquid storage tank 5. The working fluid is pumped out, and then enters the first electronic expansion valve 28 for throttling, one way passes through the second electronic expansion valve 29 and then enters the second evaporator 7 to absorb the heat of the environment and evaporates, and the other way enters the subcooler through the fifth stop valve 30 8. Endothermic evaporation, and then the gaseous refrigerant enters the first adsorber 1 through the fourth shut-off valve 32 to be adsorbed;

In the water circulation system, the cold water flowing out from the circulating water outlet k4 of the first adsorber 1 enters the third water pump 15, and the cold water after being pressurized by the third water pump 15 enters the condenser 12 through the first electric four-way reversing valve 20. Endothermic, the preliminarily heated hot water enters the regenerator 13, the second heat exchanger 3 and the first heat exchanger 19 in turn to further absorb heat and heat up, and the high-temperature hot water enters the second adsorber 2 to release heat and then the high-temperature hot water Through the first electric four-way reversing valve 20, it enters the regenerator 13 to release heat and cool down, and then enters the cooler 14 for further cooling, and then enters the first adsorber 1 through the second electric four-way reversing valve 21 to absorb heat, complete a cycle.

Second, the first adsorber desorption, the second adsorber adsorption:

Open the first shut-off valve 26, the fifth shut-off valve 30, the third shut-off valve 31, the first electronic expansion valve 28, the second electronic expansion valve 29, the first electric four-way reversing valve 20, and the second electric four-way reversing valve Valve 21, throttle valve 9, at the same time, open the first water pump 18, the second water pump 6, the third water pump 15, the refrigeration compressor 11, and the other valves are closed; wherein, the compression refrigeration cycle and solar hot water cycle and mode one is the same;

In the adsorption refrigeration system, the adsorbent in the first adsorber 1 absorbs heat to heat up, and the desorption process is carried out. The gaseous refrigerant flows out from the top outlet k3, and then enters the second heat exchange through the first cut-off valve 26. Exothermic cooling in the condenser 3, the preliminarily cooled refrigerant enters the second condenser 4 to be further cooled into a liquid refrigerant, and then enters the liquid storage tank 5 for storage, and the liquid in the liquid storage tank 6 is refrigerated by the second water pump 6. The working fluid is lifted out and enters the first electronic expansion valve 28 for throttling, one way passes through the second electronic expansion valve 29 and then enters the second evaporator 7 to absorb the heat of the environment and evaporates, and the other way enters the subcooler through the fifth stop valve 30 8. Endothermic evaporation, and then the gaseous circulating working medium enters the second adsorber 2 through the third shut-off valve 31 to be adsorbed; in the water circulation system, the cold water flowing out from the circulating water outlet k4 of the first adsorber 1 enters the third In the water pump 15, the cold water pressurized by the third water pump 15 enters the condenser 12 to absorb heat through the first electric four-way reversing valve 20, and the hot water after the initial temperature rise enters the regenerator 13, the second heat exchanger 3 and the The first heat exchanger 19 further absorbs heat and heats up, and the high-temperature hot water enters the second adsorber 2 to release heat, and then the high-temperature hot water is pressurized by the third water pump 15 and enters the regenerator 13 through the first electric four-way reversing valve 20 The internal heat is released to cool down, and then it enters the cooler 14 to further cool down, and then enters the first adsorber 1 through the second electric four-way reversing valve 21 to absorb heat to complete a cycle.

In the water circulation system, the cold water flowing out from the circulating water outlet n4 of the second adsorber 2 enters the first condenser 12 through the first electric four-way reversing valve 20 to absorb heat, and then passes through the regenerator 13, the second The heat exchanger 3 and the first heat exchanger 19 absorb heat and heat up, and the high-temperature hot water enters the first adsorber 1 to release heat, and then the high-temperature hot water enters the third water pump 15 for pressure, and enters through the first electric four-way reversing valve 20. The regenerator 13 releases heat to cool down, then enters the cooler 14 to further cool down, and then enters the second adsorber 2 to absorb heat through the second electric four-way reversing valve 21 to complete a cycle.

Further preferably, the frequency of the first water pump 18 is in a proportional adjustment relationship with the temperature of the lower outlet b2 of the first heat exchanger 19; the fan speed of the cooler 14 The outlet temperature of the cooler 14 is in a proportional adjustment relationship; The fan speed of the second condenser 4 is proportional to the outlet temperature of the second condenser 4 ; the valves of the first electronic expansion valve 28 and the second electronic expansion valve 29 are proportional to the outlet temperature of the second evaporator 7 .

Compared with the prior art, the advantages and beneficial effects that the present invention has mainly include the following points:

The invention proposes a solar energy refrigeration and air conditioning system, which recovers adsorption heat and condensation heat for the preheating of circulating water, and reuses the high-temperature circulating water heated by solar energy for the desorption process of the adsorbent, thereby reducing energy waste and reducing energy consumption. The energy consumption required for desorption is reduced, and the refrigeration coefficient of the adsorption refrigeration system is improved; the continuous operation of the adsorption refrigeration system is realized by alternately using two adsorbers; part of the refrigeration medium in the adsorption refrigeration system enters the subcooler The internal heat absorption and evaporation improves the subcooling degree of the compression refrigeration system, thereby improving the refrigeration coefficient of the compression refrigeration system, and the refrigeration coefficient is increased by 3.2%-8%. energy consumption of the refrigeration system.

Description of drawings:

Fig. 1 is the system structure schematic diagram of the embodiment of the present invention:

In the figure: 1 is the first adsorber, 2 is the second adsorber, 3 is the second heat exchanger, 4 is the second condenser, 5 is the liquid storage tank, 6 is the second water pump, and 7 is the second evaporator , 8 is the subcooler, 9 is the throttle valve, 10 is the first evaporator, 11 is the refrigeration compressor, 12 is the first condenser, 13 is the regenerator, 14 is the cooler, and 15 is the third water pump, 16 is the solar collector, 17 is the hot water tank, 18 is the first water pump, 19 is the first heat exchanger, 20 is the first electric four-way regulating valve, 21 is the second electric four-way regulating valve, and 22 is the first electric four-way regulating valve. A temperature sensor, 23 is the second temperature sensor, 24 is the third temperature sensor, 25 is the fourth temperature sensor, 26 is the first stop valve, 27 is the second stop valve, 28 is the first electronic expansion valve, 29 is the first Two electronic expansion valves, 30 is the fifth shut-off valve, 31 is the third shut-off valve, and 32 is the fourth shut-off valve.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

As shown in FIG. 1, a solar refrigeration and air conditioning system includes a solar water heating system, a compression refrigeration system, an adsorption refrigeration system and a circulating water system. The solar water heating system includes a solar collector panel 16, a hot water tank 17. The first water pump 18, the first heat exchanger 19; the compression refrigeration system includes a refrigeration compressor 11, a first condenser 12, a subcooler 8, a throttle valve 9, and a first evaporator 10; The adsorption refrigeration system described above includes a first adsorber 1, a second adsorber 2, a second heat exchanger 3, a second condenser 4, a liquid storage tank 5, a second water pump 6, a second evaporator 7, a first electronic Expansion valve 28, second electronic expansion valve 29; the circulating water system includes, third water pump 15, regenerator 13, cooler 14;

In the solar hot water system, the outlet of the solar collector 16 is connected to the inlet of the hot water tank 17 through a pipeline, the outlet of the hot water tank 17 is connected to the inlet of the first water pump 18 through a pipeline, and the outlet of the first water pump 18 is connected to the first heat exchange through a pipeline. The upper inlet a1 of the heat exchanger 19, the upper outlet a2 of the first heat exchanger 19 is connected to the inlet of the solar collector 16 through pipes;

In the compression refrigeration system, the outlet of the refrigeration compressor 11 is connected to the lower inlet g1 of the first condenser 12 through a pipeline, and the lower outlet g2 of the condenser 12 is connected to the inlet f1 of the subcooler 8 through a pipeline, and the outlet f2 of the subcooler 8 The inlet of the throttle valve 9 is connected through a pipeline, and the outlet of the throttle valve 9 is connected to the inlet of the refrigeration compressor 10 through a pipeline;

In the adsorption refrigeration system, the refrigerant outlet k3 at the top of the first adsorber 1 is connected to the second adsorber through the first cut-off valve 26 and the refrigerant outlet n3 at the top of the second adsorber 2 through the second cut-off valve 27. In the heat exchanger 3, the lower outlet d2 of the second heat exchanger 3 is connected to the inlet of the second condenser 4 through a pipeline, the outlet of the second condenser 4 is connected to the inlet of the liquid storage tank 5 through a pipeline, and the outlet of the liquid storage tank 5 is connected through a pipeline. The pipeline is connected to the inlet of the second water pump 6, the outlet of the second water pump 6 is connected to the inlet of the second evaporator 7 through the first electronic expansion valve 28 and the second electronic expansion valve 29 in turn through the pipeline, and the outlet of the second evaporator 7 is connected to the inlet of the second evaporator 7. The outlet e2 of the subcooler 8 is connected and divided into two paths. One path is connected to the refrigerant inlet n2 of the second adsorber 2 through the third cut-off valve 31, and the other path is connected to the refrigeration working medium of the first adsorber 1 through the fourth cut-off valve 32. Working medium inlet k2;

In the circulating water system, the circulating water outlet k4 of the first adsorber 1 is connected to the inlet of the third water pump 15 through a pipeline, and the outlet of the third water pump 15 is connected to the first condenser through the first electric four-way reversing valve 20. The upper inlet h1 of 12 and the upper outlet h2 of the second condenser 12 are connected to the inlet i1 of the regenerator 13 through pipes, and the outlet i2 of the second heat exchanger 13 is connected to the upper inlet c1 of the second heat exchanger 3 through pipes. The upper outlet c2 of the second heat exchanger 3 is connected to the inlet b1 of the first heat exchanger 19 through a pipeline, and the outlet b2 of the first heat exchanger 19 is connected to the circulating water inlet of the second adsorber 2 through the second electric four-way reversing valve 21 n1, the circulating water outlet n4 of the second adsorber 2 is connected to the inlet j1 of the second heat exchanger 13 through the first electric four-way reversing valve 20, and the outlet j2 of the second heat exchanger 13 is connected to the cooler 14 through pipes. The inlet, the outlet of the cooler 14 is connected to the circulating water inlet k1 of the first adsorber 1 through the second electric four-way reversing valve 21 .

A subcooler 8 is arranged between the outlet of the first electronic expansion valve 28 and the outlet of the second evaporator 7 to improve the degree of subcooling of the refrigerant entering the first evaporator 10. A fifth shut-off valve 30 is provided before the inlet e1 of the cooler 8 .

Further preferably, in the novel solar refrigeration and air conditioning system, the first water pump 18 is a variable frequency pump.

A first temperature sensor 22 is arranged on the pipeline between the outlet of the cooler 14 and the inlet of the second electric four-way regulating valve 21, and the first temperature sensor 22 is connected to the fan of the cooler 14 through a wire; the first heat exchange A second temperature sensor 23 is installed on the pipeline between the outlet b2 of the condenser 19 and the inlet of the second electric four-way regulating valve 21, and the second temperature sensor 23 is connected to the first water pump 18 through a wire; the outlet of the second condenser 4 is connected to the liquid storage A third temperature sensor 24 is provided on the pipeline between the inlets of the tank 5, and the third temperature sensor 24 is connected to the fan of the second condenser 4 through wires; the outlet of the second evaporator 7 is provided with a fourth temperature sensor 25, the fourth The temperature sensor 25 is connected to the first electronic expansion valve 28 and the second electronic expansion valve 29 through wires.

A working method of a solar refrigeration and air-conditioning system has two working modes, and the specific contents are as follows:

1. The first adsorber 1 is adsorbed, and the second adsorber 2 is desorbed:

Open the second shut-off valve 27, the fifth shut-off valve 30, the fourth shut-off valve 32, the first electronic expansion valve 28, the second electronic expansion valve 29, the first four-way regulating valve 20, the second four-way regulating valve 21, and the At the same time, open the first water pump 18, the second water pump 6, the third water pump 15, the refrigeration compressor 11, and the other valves are closed; The gaseous refrigerating working medium then enters the condenser 12 to release heat and condense, and the liquefied refrigerating working medium enters the subcooler 8 to exchange heat with the refrigerating working medium of the adsorption refrigeration system. The throttle valve 9 throttles and reduces the pressure, and then enters the first evaporator 10 to absorb the heat of the air and changes back to the low-temperature and low-pressure gaseous refrigeration working medium, and then enters the refrigeration compressor 11 for the next cycle;

In the solar hot water system, the cold water after heat exchange enters the solar collector plate 16 for heating and becomes high-temperature hot water, and the high-temperature hot water enters the hot water tank 17 for storage. After being pressurized by the first water pump 18, the water enters the first heat exchanger 19 for heat exchange with the circulating water, and the low-temperature water flowing out from the upper outlet a2 of the first heat exchanger 19 enters the solar heat collector 16 again for heating and heating;

In the above-mentioned adsorption refrigeration system, the adsorbent in the second adsorber 2 absorbs heat and heats up to carry out the desorption process. Under the action of high temperature, the gaseous refrigerant flows out from the top outlet n3, and then passes through the second shut-off valve. 27 enters the second heat exchanger 3 and exchanges heat with the circulating water and then cools down. The preliminarily cooled refrigerant enters the second condenser 4 and is further cooled into a liquid refrigerant, and then enters the liquid storage tank 5 for storage. The second water pump 6. Lift out the liquid refrigerant in the liquid storage tank 5, and then enter the first electronic expansion valve 28 to throttle to the required pressure, pass through the second electronic expansion valve 29 all the way, and then enter the second evaporator 7 to absorb the heat of the environment and evaporate. , bear part of the cooling load required for refrigeration, and the other path enters the subcooler 8 through the fifth cut-off valve 30 to absorb heat and evaporate. When the adsorption refrigeration system is insufficient to increase the cooling capacity, the fifth cut-off valve 30 is closed to give priority to the cooling capacity. Provided to the second evaporator 7, and then the gaseous refrigerant enters the first adsorber 1 through the fourth shut-off valve 32 to be adsorbed;

In the water circulation system, the cold water flowing out from the circulating water outlet k4 of the first adsorber 1 enters the third water pump 15, and the cold water after being pressurized by the third water pump 15 enters the condenser 12 through the first electric four-way reversing valve 20. Endothermic, the preliminarily heated hot water enters the regenerator 13, the second heat exchanger 3 and the first heat exchanger 19 in turn to further absorb heat and heat up, and the high-temperature hot water enters the second adsorber 2 to release heat to provide adsorbents The heat required for the desorption process, the hot water after the heat exchange is completed enters the regenerator 13 through the first electric four-way reversing valve 20 to exchange heat with the cold water, and then enters the cooler 14 for further cooling, and then passes through the second electric four-way reversing valve 20. The reversing valve 21 enters the first adsorber 1 to absorb heat, takes away the heat generated by the adsorption process of the adsorber 1, and performs the next cycle.

Second, the first adsorber desorption, the second adsorber adsorption:

Open the first shut-off valve 26, the fifth shut-off valve 30, the third shut-off valve 31, the first electronic expansion valve 28, the second electronic expansion valve 29, the first electric four-way reversing valve 20, and the second electric four-way reversing valve Valve 21, throttle valve 9, at the same time, open the first water pump 18, the second water pump 6, the third water pump 15, the refrigeration compressor 11, and the other valves are closed; wherein, the compression refrigeration cycle and solar hot water cycle and mode one is the same;

In the above adsorption refrigeration system, the adsorbent in the first adsorber 1 absorbs heat to heat up, and performs a desorption process. Under the action of high temperature, the gaseous refrigerant flows out from the top outlet k3, and then passes through the first cut-off valve 26. Enter the second heat exchanger 3 to exchange heat with circulating water to cool down, and the refrigerant after preliminary cooling enters the second condenser 4 to be further cooled into a liquid refrigerant, and then enters the liquid storage tank 5 for storage, and passes through the second water pump 6. The liquid refrigerant in the liquid storage tank 6 is lifted out, enters the first electronic expansion valve 28 for throttling to the required pressure, and passes through the second electronic expansion valve 29 all the way into the second evaporator 7 to absorb the heat of the environment and evaporate. , bear part of the cooling load required for refrigeration, and the other path enters the subcooler 8 through the fifth cut-off valve 30 to absorb heat and evaporate. When the cooling capacity provided by the adsorption refrigeration system is insufficient, the fifth cut-off valve 30 is closed to give priority to the cooling capacity. To the second evaporator 7, and then the gaseous circulating working medium enters the second adsorber 2 through the third shut-off valve 31 to be adsorbed;

In the water circulation system, the cold water flowing out from the circulating water outlet n4 of the second adsorber 2 enters the first condenser 12 through the first electric four-way reversing valve 20 to absorb heat, and then passes through the regenerator 13, the second The heat exchanger 3 and the first heat exchanger 19 absorb heat and heat up, and the high-temperature hot water enters the first adsorber 1 to release heat, providing the heat required for the adsorbent desorption process, and then the high-temperature hot water enters the third water pump 15 for pressure, and the The first electric four-way reversing valve 20 enters the regenerator 13 to release heat and cool down, and then enters the cooler 14 to further cool down, and then enters the second adsorber 2 through the second electric four-way reversing valve 21 to absorb heat, with The heat generated by the adsorption process of the adsorber 2 is taken away, and the next cycle is carried out.

Wherein, the frequency of the first water pump 18 is proportional to the temperature of the lower outlet b2 of the first heat exchanger 19. When the temperature of the lower outlet b2 of the first heat exchanger 19 is too low, it means that the first heat exchanger 19 needs to be increased. The outlet flow of the water pump 18 needs to increase the frequency of the first water pump 18 at this time to increase the heat exchange of the first heat exchanger 19; the fan speed of the cooler 14 is proportional to the outlet temperature of the cooler 14. When the cooler 14 When the outlet temperature is too high, it means that the fan speed of the cooler 14 needs to be increased at this time to increase the heat dissipation to achieve the purpose of reducing the outlet water temperature of the cooler 14; the fan speed of the second condenser 4 is the same as that of the second condenser. The outlet temperature of 4 is in a proportional adjustment relationship. When the outlet temperature of the second condenser 4 is too high, it means that the heat dissipation of the second condenser 4 needs to be increased at this time, and the fan speed of the second cooler needs to be increased at this time. Thereby, the heat dissipation of the refrigerant is increased; the valves of the first electronic expansion valve 28 and the second electronic expansion valve 29 are in a proportional adjustment relationship with the outlet temperature of the second evaporator 7. When the outlet temperature of the second evaporator 7 is too high , indicating that the refrigerant flow rate needs to be increased, and at this time, the opening degrees of the electronic expansion valve 28 and the electronic expansion valve 29 need to be increased at the same time.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (9)

1. A solar energy refrigeration and air conditioning system, characterized in that it comprises a solar water heating system, a compression refrigeration system, an adsorption refrigeration system and a circulating water system, and the solar water heating system comprises a solar collector plate (16), a thermal a water tank (17), a first water pump (18), and a first heat exchanger (19); the compression refrigeration system includes a refrigeration compressor (11), a first condenser (12), and a subcooler (8) ), a throttle valve (9), a first evaporator (10); the adsorption refrigeration system includes a first adsorber (1), a second adsorber (2), a second heat exchanger (3), a first Two condensers (4), a liquid storage tank (5), a second water pump (6), a second evaporator (7), a first electronic expansion valve (28), and a second electronic expansion valve (29); the described The circulating water system includes a third water pump (15), a regenerator (13), and a cooler (14); In the solar hot water system, the outlet of the solar collector plate (16) is connected to the inlet of the hot water tank (17) through a pipeline, the outlet of the hot water tank (17) is connected to the inlet of the first water pump (18) through a pipeline, and the first water pump ( 18) The outlet is connected to the upper inlet a1 of the first heat exchanger (19) through a pipeline, and the upper outlet a2 of the first heat exchanger (19) is connected to the inlet of the solar collector panel (16) through a pipeline; In the compression refrigeration system, the outlet of the refrigeration compressor (11) is connected to the lower inlet g1 of the first condenser (12) through a pipeline, and the lower outlet g2 of the condenser (12) is connected to the inlet f1 of the subcooler (8) through a pipeline. , the outlet f2 of the subcooler (8) is connected to the inlet of the throttle valve (9) through a pipeline, and the outlet of the throttle valve (9) is connected to the inlet of the refrigeration compressor (10) through a pipeline; In the adsorption refrigeration system, the refrigerant outlet k3 at the top of the first adsorber (1) passes through the first cut-off valve (26) and the refrigerant outlet n3 at the top of the second adsorber (2) passes through the second cut-off valve (27). ) are jointly connected to the lower inlet d1 of the second heat exchanger (3) through pipes, and the lower outlet d2 of the second heat exchanger (3) is connected to the inlet of the second condenser (4) through pipes, and the second condenser (4) ) is connected to the inlet of the liquid storage tank (5) through a pipeline, the outlet of the liquid storage tank (5) is connected to the inlet of the second water pump (6) through a pipeline, and the outlet of the second water pump (6) is connected to the first electronic pump through the pipeline. The expansion valve (28) and the second electronic expansion valve (29) are connected to the inlet of the second evaporator (7), and the outlet of the second evaporator (7) is connected to the outlet e2 of the subcooler (8) and is divided into two paths , one way is connected to the refrigerant inlet n2 of the second adsorber (2) through the third cut-off valve (31), and the other way is connected to the refrigerant inlet k2 of the first adsorber (1) through the fourth cut-off valve (32) ; In the circulating water system, the circulating water outlet k4 of the first adsorber (1) is connected to the inlet of the third water pump (15) through a pipeline, and the outlet of the third water pump (15) passes through the first electric four-way reversing valve. (20) The upper inlet h1 of the first condenser (12) is connected, the upper outlet h2 of the second condenser (12) is connected to the inlet i1 of the regenerator (13) through pipes, and the outlet of the second heat exchanger (13) i2 is connected to the upper inlet c1 of the second heat exchanger (3) through a pipeline, and the upper outlet c2 of the second heat exchanger (3) is connected to the inlet b1 of the first heat exchanger (19) through a pipeline, and the first heat exchanger (19) ) The outlet b2 is connected to the circulating water inlet n1 of the second adsorber (2) through the second electric four-way reversing valve (21), and the circulating water outlet n4 of the second adsorber (2) passes through the first electric four-way reversing The valve (20) is connected to the inlet j1 of the second heat exchanger (13), the outlet j2 of the second heat exchanger (13) is connected to the inlet of the cooler (14) through pipes, and the outlet of the cooler (14) passes through the second The electric four-way reversing valve (21) is connected to the circulating water inlet k1 of the first adsorber (1). 2. A solar-powered refrigeration and air-conditioning system according to claim 1, wherein a subcooler (8) is provided between the outlet of the first electronic expansion valve (28) and the outlet of the second evaporator (7), A fifth shut-off valve (30) is provided before the outlet of the first electronic expansion valve (28) and the inlet e1 of the subcooler (8). 3 . The solar refrigeration and air conditioning system according to claim 1 , wherein the first water pump ( 18 ) is a variable frequency pump. 4 . The solar refrigeration and air conditioning system according to claim 1, characterized in that a first temperature sensor is provided on the pipeline between the outlet of the cooler (14) and the inlet of the second electric four-way regulating valve (21). (22), the first temperature sensor (22) is connected to the fan of the cooler (14) through a wire. 5. A solar-powered refrigeration and air-conditioning system according to claim 1, characterized in that, a pipeline between the outlet b2 of the first heat exchanger (19) and the inlet of the second electric four-way regulating valve (21) is provided with A second temperature sensor (23), the second temperature sensor (23) is connected to the first water pump (18) through a wire. 6. The solar refrigeration and air-conditioning system according to claim 1, wherein a third temperature sensor (24) is provided on the pipeline between the outlet of the second condenser (4) and the inlet of the liquid storage tank (5). ), the third temperature sensor (24) is connected to the fan of the second condenser (4) through a wire. 7. The solar refrigeration and air conditioning system according to claim 1, wherein a fourth temperature sensor (25) is provided at the outlet of the second evaporator (7), and the fourth temperature sensor (25) is connected by a wire To the first electronic expansion valve (28) and the second electronic expansion valve (29). 8. The working method of a solar refrigeration and air-conditioning system according to any one of claims 2-7, characterized in that it has the following two working modes: 1. The first adsorber (1) is adsorbed, and the second adsorber (2) is desorbed: Open the second shut-off valve (27), the fifth shut-off valve (30), the fourth shut-off valve (32), the first electronic expansion valve (28), the second electronic expansion valve (29), the first four-way regulating valve ( 20), the second four-way regulating valve (21), the throttle valve (9), and at the same time, open the first water pump (18), the second water pump (6), the third water pump (15), and the refrigeration compressor (11) , the other valves are closed; the low-temperature and low-pressure gaseous refrigerant is inhaled by the refrigeration compressor (11), compressed into a high-temperature and high-pressure gaseous refrigerant, and then enters the condenser (12) to release heat and condense, and the liquefied refrigerant enters the The cooler (8) further releases heat, and after subcooling, the low-temperature and high-pressure refrigeration working medium is throttled and depressurized by the throttle valve (9) and then enters the first evaporator (10), and absorbs air in the first evaporator (10). After the heat is changed back to the low-temperature and low-pressure gaseous refrigeration working medium, it enters the refrigeration compressor (11) for the next cycle; In the solar hot water system, cold water enters the solar collector plate (16) for heating and becomes high-temperature hot water, the high-temperature hot water enters the hot water tank (17) for storage, and the high-temperature hot water in the water tank passes through the first water pump (18). ) enter the first heat exchanger (19) to carry out heat exchange after pressurization, and the low-temperature water flowing out from the upper outlet a2 of the first heat exchanger (19) enters the solar collector plate (16) again to heat up; In the described adsorption refrigeration system, the adsorbent in the second adsorber (2) absorbs heat to heat up to carry out a desorption process, and the gaseous refrigerant flows out from the top outlet n3, and then enters through the second cut-off valve (27). In the second heat exchanger (3), the cooling medium is released and cooled, and the preliminarily cooled refrigerant enters the second condenser (4) for further cooling into a liquid refrigerant, and then enters the liquid storage tank (5) for storage. The second water pump (6) Lift out the liquid refrigerant in the liquid storage tank (5), then enter the first electronic expansion valve (28) for throttling, and pass through the second electronic expansion valve (29) all the way into the second evaporator ( 7) Absorb the heat of the environment and evaporate, and the other way enters the subcooler (8) through the fifth cut-off valve (30) to absorb heat and evaporate, and then the gaseous refrigerant enters the first adsorber (1) through the fourth cut-off valve (32). ) is adsorbed; In the water circulation system, the cold water flowing out from the circulating water outlet k4 of the first adsorber (1) enters the third water pump (15), and the cold water after being pressurized by the third water pump (15) passes through the first electric four-way commutation. The valve (20) enters the condenser (12) to absorb heat, and the preliminarily heated hot water enters the regenerator (13), the second heat exchanger (3) and the first heat exchanger (19) in turn to absorb heat and heat up, The high-temperature hot water enters the second adsorber (2) to release heat, and then the high-temperature hot water enters the regenerator (13) through the first electric four-way reversing valve (20) to release heat and cool down, and then enters the cooler (14) The temperature is further lowered, and then enters the first adsorber (1) to absorb heat through the second electric four-way reversing valve (21) to complete a cycle; Second, the first adsorber desorption, the second adsorber adsorption: Open the first shut-off valve (26), the fifth shut-off valve (30), the third shut-off valve (31), the first electronic expansion valve (28), the second electronic expansion valve (29), and the first electric four-way reversing Valve (20), second electric four-way reversing valve (21), throttle valve (9), at the same time, open first water pump (18), second water pump (6), third water pump (15), refrigeration compression machine (11), the other valves are closed; wherein, the compression refrigeration cycle and the solar hot water cycle are the same as the mode one; In the adsorption refrigeration system, the adsorbent in the first adsorber (1) absorbs heat to increase the temperature, and the desorption process is carried out, and the gaseous refrigerant flows out from the top outlet k3, and then enters through the first cut-off valve (26). The second heat exchanger (3) releases heat to cool down, and the preliminarily cooled refrigerant enters the second condenser (4) for further cooling into a liquid refrigerant, and then enters the liquid storage tank (5) for storage, and passes through the second water pump. (6) The liquid refrigerant in the liquid storage tank (6) is lifted out, enters the first electronic expansion valve (28) for throttling, and passes through the second electronic expansion valve (29) all the way into the second evaporator ( 7) Absorb the heat of the environment and evaporate, and the other way enters the subcooler (8) through the fifth cut-off valve (30) to absorb heat and evaporate, and then the gaseous circulating working medium passes through the third cut-off valve (31) and enters the second adsorber (2). ) is adsorbed; in the described water circulation system, the cold water flowing out from the circulating water outlet k4 of the first adsorber (1) enters the third water pump (15), and the cold water after being pressurized by the third water pump (15) passes through the first water pump (15). The electric four-way reversing valve (20) enters the condenser (12) to absorb heat, and the preliminarily heated hot water enters the regenerator (13), the second heat exchanger (3) and the first heat exchanger (19) in turn. Further heat absorption and temperature rise, the high-temperature hot water enters the second adsorber (2) to release heat, and then the high-temperature hot water is pressurized by the third water pump (15), and enters the regenerator (20) through the first electric four-way reversing valve (20). 13) internal heat release and cooling, then enter the cooler (14) for further cooling, and then enter the first adsorber (1) to absorb heat through the second electric four-way reversing valve (21) to complete a cycle; In the water circulation system, the cold water flowing out from the circulating water outlet n4 of the second adsorber (2) enters the first condenser (12) through the first electric four-way reversing valve (20) to absorb heat, and then returns to the first condenser (12) in turn. The heat exchanger (13), the second heat exchanger (3) and the first heat exchanger (19) absorb heat and heat up, and the high-temperature hot water enters the first adsorber (1) to release heat, and then the high-temperature hot water enters the third water pump ( 15) Pressurize, enter the regenerator (13) through the first electric four-way reversing valve (20) to release heat and cool down, then enter the cooler (14) for further cooling, and then pass through the second electric four-way reversing valve (21) Enter the second adsorber (2) to absorb heat to complete a cycle. 9. The working method of a solar refrigeration and air-conditioning system according to claim 8, wherein the frequency of the first water pump (18) is adjusted in direct proportion to the temperature of the lower outlet b2 of the first heat exchanger (19). The fan speed of the cooler (14) is proportional to the outlet temperature of the cooler (14); the fan speed of the second condenser (4) is proportional to the outlet temperature of the second condenser (4) relationship; the valves of the first electronic expansion valve (28) and the second electronic expansion valve (29) are in a proportional adjustment relationship with the outlet temperature of the second evaporator (7).

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