CN108106045A - A kind of air-conditioning refrigerator combined system of central refrigerating split cooling - Google Patents

Abstract

The invention discloses a kind of air-conditioning refrigerator combined systems of central refrigerating split cooling.The present invention includes：High temperature compressor, oil eliminator, four-way valve, air cooling heat exchanger, liquid storage device, evaporative condenser, water cooling heat exchanger, gas-liquid separator, cooling throttle valve, heat supply throttle valve, cryogenic compressor, cryogenic throttle valve, cryogenic heat exchanger, independent refrigerator body, coolant pump, fan coil, water pump, several solenoid valves, high temperature refrigerant pipe, low-temperature refrigerant pipe, refrigerating medium pipe and water pipe.The present invention can be realized to be energized using a set of refrigeration system to multiple rooms and Duo Tai refrigerator bodies, while room preferred ambient temperature is maintained, realizes the maintenance of low temperature environment in refrigerator body.

Description

An air-conditioning and refrigerator combined system for central refrigeration and split cooling

technical field

The invention relates to the field of refrigeration, in particular to a centralized refrigeration refrigeration system capable of simultaneously realizing the functions of an air conditioner and a refrigerator.

Background technique

Traditional household refrigerators are all independent, that is, a set of refrigeration system is used to maintain the low temperature of a refrigerator, but in the actual operation process, due to the excellent insulation effect of the refrigerator box, the operation time of the refrigeration system has a great gap In other words, the low utilization efficiency of the system leads to the inability of the system to fully play its role. At the same time, there are also contradictions in the selection process of the system equipment. If the cooling capacity is too large, it can achieve rapid cooling, but the initial investment cost is high. If the cooling capacity is selected too much Although it will reduce the cost, it will cause large temperature fluctuations when the refrigerator stores food. If the frequency conversion equipment is used to adjust the load, the cost and price of the refrigerator will be further increased.

With the development of urban apartments and office buildings, the standardization of room layout has become one of the development directions. Fixed electrical equipment is placed in fixed locations, such as the centralized cooling and split cooling mode of central air-conditioning. In view of this, the central air-conditioning system can Combined with the refrigerator system to seek effective measures to improve refrigeration efficiency.

Contents of the invention

In view of this, the present invention provides an air-conditioning and refrigerator combined system for centralized refrigeration and split cooling, which can not only meet the adjustment of the ambient temperature of the living space, but also be used to maintain the low-temperature environment of the refrigerator. Through reasonable strategic allocation, it can realize Efficient operation of refrigeration systems.

The invention provides an air-conditioning and refrigerator combined system for centralized refrigeration and split cooling, which includes a high-temperature refrigeration system and a low-temperature refrigeration system; the high-temperature refrigeration system includes a high-temperature compressor 1, an oil separator 2, a four-way valve 3, an air cooling Heat exchanger 4, liquid receiver 5, evaporative condenser 6, water-cooled heat exchanger 7, gas-liquid separator 8, cooling throttle valve 9, heating throttle valve 10; the low-temperature stage refrigeration system includes a low-temperature compressor 11 , low temperature throttle valve 12, low temperature heat exchanger 13; independent refrigerator body 14, brine pump 15, fan coil unit 16, water pump 17, solenoid valve 1 20, solenoid valve 2 21, solenoid valve 3 22, solenoid valve 4 23. Solenoid valve 5 24, high-temperature refrigerant pipe 30, low-temperature refrigerant pipe 31, brine pipe 32, water pipe 33, oil circuit 34; the air outlet of high-pressure refrigeration compressor 1 is connected to oil separator 2 and 4 in turn through the air circuit Through valve 3, air-cooled heat exchanger 4, liquid storage 5, the bottom of oil separator 2 flows back to high-pressure compressor 1 through oil passage 34; liquid storage 5 is provided with cooling throttle valve 9 and solenoid valve 3 22 The pipeline is connected to the inlet of evaporative condenser 6 high temperature grade refrigerant, the air-cooled heat exchanger 4 is connected to the inlet of evaporative condenser 6 high temperature grade refrigerant through the pipeline with solenoid valve 2 21, and the outlet of evaporative condenser 6 high temperature grade refrigerant is passed through The condensing pipeline is connected to the water-cooled evaporator 7, the liquid receiver 5 is connected to the condensing pipeline by setting the heating throttle valve 10 and the solenoid valve 5 24, and the air-cooled heat exchanger 4 is connected to the condensing pipeline by setting the solenoid valve 1 20 and the solenoid valve 4 The pipeline of 23 is connected to the condensation pipeline, the water-cooled evaporator 7 is connected to the four-way valve 3 through the high-temperature refrigerant pipe 30, the four-way valve 3 is connected to the gas-liquid separator 8, and the gas outlet of the gas-liquid separator 8 is connected to the high-pressure compressor 1 Inlet; the outlet of the low-temperature compressor 11 is connected to the evaporative condenser 6, and the evaporative condenser 6 is connected to the low-temperature evaporator 13 through the low-temperature refrigerant pipe 31 provided with the low-temperature throttle valve 12, and the low-temperature evaporator 13 is connected to the inlet of the low-temperature compressor 11; a water pump 17 is provided The water channel of the water-cooled evaporator 7 is connected to the cooling water inlet, and the cooling water outlet of the water-cooled evaporator 7 is connected to the water delivery pipe 33, and the water delivery pipe 33 is respectively connected to the fan coil unit 16 of each room, and the pipeline of the brine pump 15 is connected to the low-temperature evaporator. The brine inlet of the evaporator 13 and the brine outlet of the low-temperature evaporator 13 are connected to the brine delivery pipe 32, and the brine delivery pipe 32 is respectively connected to each independent refrigerator body 14.

For ease of understanding, in the present invention, the high-temperature refrigerant is referred to as refrigerant A, and the low-temperature refrigerant is designated as refrigerant B. The two refrigerants may be the same or different. Commonly used refrigerants include R600a, R134a, and R404A.

Its basic working principle can be divided according to summer working conditions and winter working conditions;

(1) Summer working conditions

At this time, the system needs to cool down the indoor environment. By adjusting the corresponding solenoid valve and four-way valve, the system circulation process is as follows:

The high-pressure refrigeration compressor compresses the low-temperature and low-pressure refrigerant A into a high-temperature, high-pressure superheated gas and then discharges it. At this time, the refrigerant A is mixed with lubricating oil. In order to prevent the lubricating oil from affecting the subsequent heat exchange of the system, the discharged superheated gas enters the oil separator for lubrication. Separation of oil and refrigerant A gas; the separated lubricating oil is deposited at the bottom of the oil separator, and then flows back to the compressor through the oil circuit to ensure the normal operation of the compressor, while the superheated gas of refrigerant A enters under the action of the four-way valve After the air-cooled heat exchanger exchanges heat with the outdoor air, it turns into a high-pressure refrigerant A liquid, which then flows into the liquid receiver; the liquid receiver is a component used to store the refrigerant A liquid, and then the refrigerant A liquid is throttled for cooling After the throttling effect of the valve, it becomes a low-temperature and low-pressure two-phase state, enters the evaporative condenser, and absorbs the heat in the refrigerant B of the low-temperature refrigeration system to partially evaporate. At this time, the dryness of the two-phase refrigerant A increases; Refrigerant A enters the water-cooled evaporator and continues to absorb the heat of cooling water to evaporate further; Refrigerant A enters the gas-liquid separator under the action of the four-way valve, and the incompletely evaporated refrigerant A liquid is stored at the bottom while the refrigerant gas returns to the To the high-temperature compressor, this is the high-temperature refrigeration system cycle.

Refrigerant B in the low-temperature refrigeration system rises in pressure and temperature under the action of the low-temperature compressor, then enters the evaporative condenser and releases heat to refrigerant A, and then condenses into a high-pressure liquid that enters the low-temperature throttle valve, and becomes In the two-phase state, the heat of the refrigerant is absorbed in the low-temperature evaporator and evaporated, and finally circulated back to the low-temperature compressor, which is the cycle of the low-temperature refrigeration system.

Under the action of the water pump, the cooling water enters the water-cooled evaporator to achieve cooling treatment, and then enters the fan coil units in each room through the water delivery pipe for cooling the indoor environment.

Under the action of the brine pump, the brine enters the low-temperature evaporator to achieve cooling treatment, and then enters each independent refrigerator body through the brine delivery pipe to maintain the low temperature in the independent refrigerator.

(2) Winter conditions

At this time, the system needs to supply heat to the indoor environment. By adjusting the corresponding solenoid valve and four-way valve, the system circulation process is as follows:

At this time, the system needs to cool down the indoor environment. By adjusting the corresponding solenoid valve and four-way valve, the system circulation process is as follows:

The high-pressure refrigeration compressor compresses the low-temperature and low-pressure refrigerant A into a high-temperature, high-pressure superheated gas and then discharges it. At this time, the refrigerant A is mixed with lubricating oil. In order to prevent the lubricating oil from affecting the subsequent heat exchange of the system, the discharged superheated gas enters the oil separator for lubrication. Separation of oil and refrigerant A gas; the separated lubricating oil is deposited at the bottom of the oil separator, and then flows back to the compressor through the oil circuit to ensure the normal operation of the compressor, while the superheated gas of refrigerant A enters under the action of the four-way valve After the water-cooled heat exchanger exchanges heat with water, it becomes high-pressure refrigerant A liquid, and then flows into the liquid receiver; the liquid receiver is a part used to store the refrigerant A liquid, and then the refrigerant A liquid passes through the heat supply throttle valve. After the throttling effect, it becomes a low-temperature and low-pressure two-phase state and then enters the evaporative condenser, and absorbs the heat in the refrigerant B of the low-temperature refrigeration system and partially evaporates. At this time, the dryness of the two-phase refrigerant A increases; A enters the air-cooled evaporator and continues to absorb the heat of the outside air to further evaporate; refrigerant A enters the gas-liquid separator under the action of the four-way valve, and the incompletely evaporated refrigerant A liquid is stored at the bottom while the refrigerant gas returns to the air-cooled evaporator. High temperature compressor, this is the cycle of high temperature refrigeration system.

Refrigerant B in the low-temperature refrigeration system rises in pressure and temperature under the action of the low-temperature compressor, then enters the evaporative condenser and releases heat to refrigerant A, and then condenses into a high-pressure liquid that enters the low-temperature throttle valve, and becomes In the two-phase state, the heat of the refrigerant is absorbed in the low-temperature evaporator and evaporated, and finally circulated back to the low-temperature compressor, which is the cycle of the low-temperature refrigeration system. Under the action of the water pump, the heating water enters the water-cooled evaporator to achieve temperature rise treatment, and then enters the fan coil units in each room through the water delivery pipe to heat up the indoor environment. Under the action of the brine pump, the brine enters the low-temperature evaporator to achieve cooling treatment, and then enters each independent refrigerator body through the brine delivery pipe to maintain the low temperature in the independent refrigerator.

The present invention utilizes a set of refrigeration system to realize both the central air-conditioning function and the space cooling of multiple refrigerators, that is, the user end only needs to be equipped with a refrigerator box and does not need to be equipped with related independent refrigeration equipment, and the cooling capacity required for the refrigerator to cool down is determined by The centralized refrigeration system is provided in a unified way, that is, to realize the cooling mode of one refrigeration system for multiple refrigerators, which can realize the optimal control and matching of refrigeration capacity, and improve the energy utilization efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the principle of an air-conditioning and refrigerator combined system for centralized refrigeration and separate cooling of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1 , an air-conditioner-refrigerator combined system for central refrigeration and split cooling provided by the present invention includes a high-temperature compressor 1, an oil separator 2, a four-way valve 3, an air-cooled heat exchanger 4, and a liquid storage device 5 , evaporative condenser 6, water-cooled heat exchanger 7, gas-liquid separator 8, cooling throttle valve 9, heating throttle valve 10, low-temperature compressor 11, low-temperature throttle valve 12, low-temperature evaporator 13, independent refrigerator Body 14, brine pump 15, fan coil unit 16, water pump 17, solenoid valve 1 20, solenoid valve 2 21, solenoid valve 3 22, solenoid valve 4 23, solenoid valve 5 24, high-temperature refrigerant pipe 30, low-temperature refrigeration Agent pipe 31, brine pipe 32, water pipe 33, oil passage 34; the air outlet of high-pressure refrigeration compressor 1 is connected to oil separator 2, four-way valve 3, air-cooled heat exchanger 4, and liquid reservoir 5 in sequence through the air passage , the bottom of the oil separator 2 flows back to the high-pressure compressor 1 through the oil passage 34; the liquid accumulator 5 is connected to the inlet of the high-temperature grade refrigerant of the evaporating condenser 6 through a pipeline provided with a cooling throttle valve 9 and a solenoid valve 22, and the air The cold heat exchanger 4 is connected to the inlet of the high-temperature grade refrigerant of the evaporative condenser 6 through the pipeline provided with the solenoid valve 221, the outlet of the high-temperature grade refrigerant of the evaporative condenser 6 is connected to the water-cooled evaporator 7 through the condensing pipeline, and the liquid receiver 5 is set The pipelines of heating throttle valve 10 and solenoid valve 5 24 are connected to the condensing pipeline, the air-cooled heat exchanger 4 is connected to the condensing pipeline through the pipelines of solenoid valve 1 20 and solenoid valve 4 23, and the water-cooled evaporator 7 passes through the high temperature The refrigerant pipe 30 is connected to the four-way valve 3, and the four-way valve 3 is connected to the gas-liquid separator 8, and the gas outlet of the gas-liquid separator 8 is connected to the inlet of the high-pressure compressor 1; The device 6 is connected to the low-temperature evaporator 13 through the low-temperature refrigerant pipe 31 provided with the low-temperature throttling valve 12, and the low-temperature evaporator 13 is connected to the inlet of the low-temperature compressor 11; The cooling water outlet of 7 is connected to the water delivery pipe 33, and the water delivery pipe 33 is respectively connected to the fan coil unit 16 of each room, and the pipeline of the brine pump 15 is connected to the brine inlet of the low-temperature evaporator 13, and the brine of the low-temperature evaporator 13 The refrigerant outlet is connected to the brine delivery pipe 32, and the brine delivery pipe 32 is connected to each independent refrigerator body 14 respectively.

Its basic working principle can be divided according to summer working conditions and winter working conditions;

(1) Summer working conditions

At this time, the system needs to cool down the indoor environment. By adjusting the four-way valve 3, open solenoid valve one 20, solenoid valve three 22, close solenoid valve two 21, solenoid valve four 23, solenoid valve five 24, the system circulation process is as follows:

High-pressure refrigeration compressor 1 compresses low-temperature and low-pressure refrigerant A into high-temperature, high-pressure superheated gas and then discharges it. At this time, refrigerant A is mixed with lubricating oil. In order to prevent the lubricating oil from affecting the subsequent heat exchange of the system, the discharged superheated gas enters oil separator 2 Realize the separation of lubricating oil and refrigerant A gas; the separated lubricating oil is deposited at the bottom of the oil separator 2, and then flows back to the high-pressure compressor 1 through the oil passage 34 to ensure the normal operation of the high-pressure compressor 1, while the superheated gas of the refrigerant A Under the action of the four-way valve 3, it enters the air-cooled heat exchanger 4 to exchange heat with the outdoor air and becomes a high-pressure refrigerant A liquid, and then flows into the liquid storage device 5; the liquid storage device 5 is used to store the refrigerant A liquid. Afterwards, the refrigerant A liquid passes through the throttling effect of the cooling throttle valve 9 and becomes a low-temperature and low-pressure two-phase state, then enters the evaporative condenser 6, and absorbs the heat in the refrigerant B of the low-temperature refrigeration system to partially evaporate At this time, the dryness of the two-phase refrigerant A increases; then the refrigerant A enters the water-cooled evaporator 7 to continue to absorb the heat of the cooling water and further evaporates; the refrigerant A enters the gas-liquid separator 8 under the action of the four-way valve 3, The incompletely evaporated refrigerant A liquid is stored at the bottom of the gas-liquid separator 8 and the refrigerant gas returns to the high-temperature compressor 1, which is a cycle of the high-temperature refrigeration system.

Refrigerant B in the low-temperature refrigeration system rises in pressure and temperature under the action of the low-temperature compressor 11, then enters the evaporative condenser 6 and releases heat to the refrigerant A, then condenses into a high-pressure liquid and enters the low-temperature throttling valve 12, where it is throttled and depressurized The effect becomes a two-phase state, absorbs the heat of the brine in the low-temperature evaporator 13 and evaporates, and finally circulates back to the low-temperature compressor 11, which is the cycle of the low-temperature refrigeration system.

Under the action of the water pump 17, the cooling water enters the water-cooled evaporator 7 to realize the cooling process, and then enters the fan coil unit 16 of each room through the water delivery pipe 33 for cooling the indoor environment.

Under the action of the brine pump 15 , the brine enters the low-temperature evaporator 13 to realize cooling treatment, and then enters each independent refrigerator body 14 through the brine delivery pipe 32 for maintaining low temperature in the independent refrigerator body 14 .

(2) Winter conditions

At this time, the system needs to supply heat to the indoor environment. By adjusting the four-way valve 3, close solenoid valve one 20, solenoid valve three 22, open solenoid valve two 21, solenoid valve four 23, solenoid valve five 24, the system circulation process is as follows:

High-pressure refrigeration compressor 1 compresses low-temperature and low-pressure refrigerant A into high-temperature, high-pressure superheated gas and then discharges it. At this time, refrigerant A is mixed with lubricating oil. In order to prevent the lubricating oil from affecting the subsequent heat exchange of the system, the discharged superheated gas enters oil separator 2 Realize the separation of lubricating oil and refrigerant A gas; the separated lubricating oil is deposited at the bottom of the oil separator 2, and then flows back to the high-pressure compressor 1 through the oil passage 34 to ensure the normal operation of the high-pressure compressor 1, while the superheated gas of the refrigerant A Under the action of the four-way valve 3, it enters the water-cooled heat exchanger 7 to exchange heat with water and becomes a high-pressure refrigerant A liquid, and then flows into the liquid receiver 5; the liquid receiver 5 is a component used to store the refrigerant A liquid. Afterwards, the refrigerant A liquid passes through the throttling action of the heating throttle valve 10 and becomes a low-temperature and low-pressure two-phase state, then enters the evaporative condenser 6, and absorbs the heat in the refrigerant B of the low-temperature refrigeration system to partially evaporate. At this time, the dryness of the two-phase refrigerant A increases; then the refrigerant A enters the air-cooled evaporator 4 and continues to absorb the heat of the outside air to further evaporate; the refrigerant A enters the gas-liquid separator 8 under the action of the four-way valve 3, and does not The fully evaporated refrigerant A liquid is stored at the bottom of the gas-liquid separator 8 and the refrigerant gas returns to the high-temperature compressor 1, which is a cycle of the high-temperature refrigeration system.

Refrigerant B in the low-temperature refrigeration system rises in pressure and temperature under the action of the low-temperature compressor 11, then enters the evaporative condenser 6 and releases heat to the refrigerant A, then condenses into a high-pressure liquid and enters the low-temperature throttling valve 12, where it is throttled and depressurized The effect becomes a two-phase state, absorbs the heat of the brine in the low-temperature evaporator 13 and evaporates, and finally circulates back to the low-temperature compressor 11, which is the cycle of the low-temperature refrigeration system.

Under the action of the water pump 17, the heating water enters the water-cooled evaporator 7 to realize the temperature raising process, and then enters the fan coil unit 16 of each room through the water delivery pipe 33, and is used for raising the temperature of the indoor environment.

Under the action of the brine pump 15 , the brine enters the low-temperature evaporator 13 to realize cooling treatment, and then enters each independent refrigerator body 14 through the brine delivery pipe 32 for maintaining low temperature in the independent refrigerator body 14 .

The way in which the individual components are connected can be clearly drawn from their cyclical processes.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (3)

1. An air-conditioning and refrigerator combined system for centralized refrigeration and split cooling, characterized in that it includes a high-temperature compressor, an oil separator, a four-way valve, an air-cooled heat exchanger, a liquid receiver, an evaporative condenser, and a water-cooled exchanger Heater, gas-liquid separator, cooling throttle valve, heating throttle valve, low-temperature compressor, low-temperature throttle valve, low-temperature evaporator, independent refrigerator body, brine pump, fan coil unit, water pump, solenoid valve 1. Solenoid valve 2, solenoid valve 3, solenoid valve 4, solenoid valve 5, high-temperature refrigerant pipe, low-temperature refrigerant pipe, refrigerant pipe, water pipe and oil circuit; the air outlet of the high-pressure refrigeration compressor is connected to the oil through the air circuit in sequence Separator, four-way valve, air-cooled heat exchanger, liquid storage, the bottom of the oil separator flows back to the high-pressure compressor through the oil circuit; The inlet of the high-temperature refrigerant of the condenser, the air-cooled heat exchanger is connected to the inlet of the high-temperature refrigerant of the evaporating condenser through the pipeline provided with the solenoid valve 2, and the outlet of the high-temperature refrigerant of the evaporating condenser is connected to the water-cooled evaporator through the condensing pipeline, and the liquid storage The air-cooled heat exchanger is connected to the condensing pipeline through the pipelines of the heating throttle valve and the solenoid valve 5, the air-cooled heat exchanger is connected to the condensing pipeline through the pipelines of the solenoid valve 1 and the solenoid valve 4, and the water-cooled evaporator is connected to the condensing pipeline through the high-temperature refrigerant pipe. Connect the four-way valve, the four-way valve is connected to the gas-liquid separator, the gas outlet of the gas-liquid separator is connected to the inlet of the high-pressure compressor; the outlet of the low-temperature compressor is connected to the evaporative condenser, and the evaporative condenser passes the low-temperature refrigerant with a low-temperature throttle valve The pipe is connected to the low-temperature evaporator, and the low-temperature evaporator is connected to the inlet of the low-temperature compressor; the water path of the water pump is connected to the cooling water inlet of the water-cooled evaporator, and the cooling water outlet of the water-cooled evaporator is connected to the delivery water pipe, and the delivery water pipe is respectively connected to the fan coil in each room. The pipeline of the brine pump is connected to the brine inlet of the low-temperature evaporator, the brine outlet of the low-temperature evaporator is connected to the brine delivery pipe, and the brine delivery pipe is respectively connected to each independent refrigerator body. 2. An air-conditioner-refrigerator combined system for centralized refrigeration and split cooling according to claim 1, characterized in that the circulation process of the system in summer is as follows: adjust the four-way valve, open solenoid valve 1 and solenoid valve 3, Close solenoid valve two, solenoid valve four, solenoid valve five. 3. An air-conditioner-refrigerator combined system for centralized refrigeration and split cooling according to claim 1, characterized in that the circulation process of the system in winter is as follows: adjust the four-way valve, close the solenoid valve 1 and solenoid valve 3 , open solenoid valve 2, solenoid valve 4, solenoid valve 5.