阅读说明：本技术 一种空调冷却系统及空调制冷方法 (Air conditioner cooling system and air conditioner refrigerating method ) 是由 魏川铖 胡北 郎蒙怜 陈之华 顾欣 康健 刘婧 刘占盛 于 2021-07-02 设计创作，主要内容包括：本发明公开一种空调冷却系统,包括空调机组、冷凝器、工质输送管线、以及工质返回管线,空调机组包括冷却器,冷却器用于供冷；工质输送管线包括第二输送管线和第三输送管线,工质返回管线包括第一返回管线和第二返回管线,冷凝器、第二输送管线、第一返回管线、以及冷却器共同构成泵驱动回路热管回路,冷凝器、第三输送管线、第二返回管线、以及冷却器共同构成蒸汽压缩式制冷回路,泵驱动回路热管回路和所述蒸汽压缩式制冷回路均用于将冷凝器中制得的低温的冷却工质通入到冷却器中进行换热,并将换热后的冷却工质返回到冷凝器重新制取低温的冷却工质。本发明还公开一种空调制冷方法。本发明能够利用自然冷源,降低能耗。(The invention discloses an air conditioner cooling system, which comprises an air conditioner unit, a condenser, a working medium conveying pipeline and a working medium return pipeline, wherein the air conditioner unit comprises a cooler, and the cooler is used for cooling; the working medium conveying pipeline comprises a second conveying pipeline and a third conveying pipeline, the working medium returning pipeline comprises a first returning pipeline and a second returning pipeline, the condenser, the second conveying pipeline, the first returning pipeline and the cooler jointly form a pump driving loop heat pipe loop, the condenser, the third conveying pipeline, the second returning pipeline and the cooler jointly form a steam compression type refrigerating loop, the pump driving loop heat pipe loop and the steam compression type refrigerating loop are all used for introducing low-temperature cooling working media prepared in the condenser into the cooler for heat exchange, and returning the cooling working media subjected to heat exchange to the condenser to prepare the low-temperature cooling working media again. The invention also discloses an air conditioner refrigeration method. The invention can utilize natural cold source to reduce energy consumption.)

1. An air-conditioning cooling system is characterized by comprising an air-conditioning unit (1), a condenser (17), a working medium conveying pipeline and a working medium return pipeline,

the air conditioning unit comprises a cooler (4) for cooling;

the working fluid delivery line comprising a second delivery line (26) and a third delivery line (27), the working fluid return line comprising a first return line (28) and a second return line (29),

the two ends of the second conveying pipeline are respectively connected with the outlet of the condenser and the inlet of the cooler, the two ends of the first return pipeline are respectively connected with the outlet of the cooler and the inlet of the condenser, the second conveying pipeline is provided with a pump, the first return pipeline is provided with a second isolating valve,

the two ends of the third conveying pipeline are respectively connected with the outlet of the condenser and the inlet of the cooler, the two ends of the second return pipeline are respectively connected with the outlet of the cooler and the inlet of the condenser, the third conveying pipeline is provided with a third isolating valve, the second return pipeline is provided with a compression refrigerating device,

the condenser, the second delivery pipeline, the first return pipeline and the cooler jointly form a heat pipe loop of the pump driving loop,

the condenser, the third delivery line, the second return line and the cooler together form a vapor compression refrigeration loop,

the pump driving loop heat pipe loop and the steam compression type refrigerating loop are used for introducing the low-temperature cooling working medium prepared in the condenser into the cooler for heat exchange, and returning the cooling working medium after heat exchange to the condenser for preparing the low-temperature cooling working medium again.

2. Air-conditioning cooling system according to claim 1, characterized in that the working medium feed line further comprises a first feed line (25),

two ends of the first conveying pipeline are respectively connected with the outlet of the condenser and the inlet of the cooler, a first isolating valve is arranged on the first conveying pipeline,

the condenser, the first conveying pipeline, the first return pipeline and the cooler jointly form a separated heat pipe loop, and the separated heat pipe loop is used for introducing the low-temperature cooling working medium prepared in the condenser into the cooler for heat exchange and returning the cooling working medium subjected to heat exchange to the condenser to prepare the low-temperature cooling working medium again.

3. Air-conditioning cooling system according to claim 2, characterized in that the compression refrigeration device comprises a compressor (14), a gas-liquid separator (15), and an oil separator (13),

the inlet of the gas-liquid separator is connected with the second return pipeline, the gas-phase outlet of the gas-liquid separator is connected with the compressor, the gas-liquid separator is used for separating and removing liquid phase substances in the cooling working medium output by heat exchange in the cooler, the gas phase substances obtained after separation are introduced into the compressor for compression and refrigeration,

the inlet of the oil separator is connected with the compressor and used for separating oil in the refrigerated cooling working medium, and the oil outlet of the oil separator is connected with the compressor through an oil return pipeline so as to return the separated oil to the compressor for reuse.

4. Air-conditioning cooling system according to claim 3, characterized by further comprising a first temperature detector (23), a second temperature detector (22), and a controller (21),

the first temperature detector is electrically connected with the controller, arranged in a cooling chamber of the cooler and used for detecting the indoor temperature and transmitting a first temperature value obtained by detection to the controller;

the second temperature detector is electrically connected with the controller, is arranged outdoors, and is used for detecting the outdoor temperature and transmitting a second temperature value obtained by detection to the controller;

the controller is further electrically connected with the first isolation valve, the second isolation valve, the third isolation valve, the compressor and the pump respectively, and is used for comparing the first temperature value with the second temperature value and controlling the on-off of the separated heat pipe loop, the pump driving loop heat pipe loop and the steam compression type refrigeration loop respectively according to the comparison result.

5. An air-conditioning cooling system according to any one of claims 1 to 4, characterized in that the condenser is disposed at a position higher than that of the cooler.

6. Air-conditioning cooling system according to any one of claims 1 to 4, characterized in that a throttling device (10) is further arranged on the third delivery return line, and the throttling device is used for reducing the pressure of the cooling working medium;

the system further comprises a liquid storage tank and a condensing fan (18),

the inlet of the liquid storage tank is connected with the outlet of the condenser, the outlet of the liquid storage tank is respectively connected with the inlet ends of the first conveying pipeline, the second conveying pipeline and the third conveying pipeline,

the condensation fan is used for dissipating heat of the condenser.

7. An air conditioning cooling system according to any one of claims 1 to 4, wherein the condenser is a finned heat exchanger,

the pump is a centrifugal pump, an axial flow pump or a mixed flow pump.

8. The air conditioning cooling system of any of claims 1-4, wherein the air conditioning assembly further comprises a filter, a heater, a humidifier, and a fan,

the inlet of the cooler is connected with the outdoor environment through the heater and the filter, and is used for introducing air from the outdoor into the cooler for heat exchange and filtering and heating the introduced air before heat exchange;

the outlet of the cooler is connected with the room through the humidifier and the fan, and is used for introducing the air subjected to heat exchange in the cooler into the room and increasing the humidity of the air before the air is introduced into the room.

9. An air-conditioning cooling method for cooling rooms of a nuclear power plant, characterized in that, by using the air-conditioning cooling system of claim 1,

when the temperature difference between the room temperature and the external temperature is more than or equal to 5 ℃, a second isolation valve and the pump are opened, so that the pump drives the loop of the loop heat pipe to operate;

and when the temperature difference between the room temperature and the external temperature is less than 5 ℃, the third isolating valve and the compression refrigerating device are opened to enable the steam compression type refrigerating circuit to operate.

10. A method of air-conditioning refrigeration for refrigerating rooms of a nuclear power plant, characterized in that an air-conditioning cooling system according to any one of claims 2 to 8 is used,

when the temperature difference between the room temperature and the outside temperature is more than 15 ℃, a first isolation valve and a second isolation valve are opened to enable the separated heat pipe loop to operate;

when the temperature difference between the room temperature and the external temperature is 5-15 ℃, the second isolation valve and the pump are opened, so that the pump drives the loop of the loop heat pipe to operate;

and when the temperature difference between the room temperature and the external temperature is less than 5 ℃, the third isolating valve and the compression refrigerating device are opened to enable the steam compression type refrigerating circuit to operate.

Technical Field

The invention belongs to the field of nuclear engineering, and particularly relates to an air conditioner cooling system and an air conditioner refrigerating method.

Background

At present, the cold source of the ventilation and air conditioning system of the nuclear power plant is mainly provided by two forms: one is to make cold water by the cold water set and send the cold water to the cooler of the air conditioning unit, and the other is to adopt the direct expansion type air conditioning unit. The two modes completely depend on the compressor to provide a cold source through vapor compression refrigeration, so that the problem of high power consumption exists, and the natural cold source in the external environment cannot be effectively and fully utilized when the outdoor temperature is low.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and provides an air conditioner cooling system and an air conditioner refrigerating method, which can utilize a natural cold source and reduce energy consumption.

According to one aspect of the invention, the invention provides an air conditioner cooling system, which adopts the technical scheme that:

an air conditioner cooling system comprises an air conditioning unit, a condenser, a working medium conveying pipeline and a working medium return pipeline, wherein:

the air conditioning unit comprises a cooler, and the cooler is used for cooling;

the working medium conveying pipeline comprises a second conveying pipeline and a third conveying pipeline, the working medium returning pipeline comprises a first returning pipeline and a second returning pipeline, two ends of the second conveying pipeline are respectively connected with an outlet of the condenser and an inlet of the cooler, two ends of the first returning pipeline are respectively connected with an outlet of the cooler and an inlet of the condenser, a pump is arranged on the second conveying pipeline, a second isolating valve is arranged on the first returning pipeline, two ends of the third conveying pipeline are respectively connected with an outlet of the condenser and an inlet of the cooler, two ends of the second returning pipeline are respectively connected with an outlet of the cooler and an inlet of the condenser, a third isolating valve is arranged on the third conveying pipeline, a compression refrigerating device is arranged on the second returning pipeline, and the condenser, the second conveying pipeline, the first returning pipeline and the third conveying pipeline are arranged in parallel, And the cooler constitutes pump drive circuit heat pipe loop jointly, and condenser, third pipeline, second return line and cooler constitute vapor compression formula refrigeration circuit jointly, pump drive circuit heat pipe loop with vapor compression formula refrigeration circuit all is arranged in letting in the cryogenic cooling working medium that makes in the condenser to carry out the heat transfer in the cooler to return to the condenser with the cooling working medium after the heat transfer and prepare cryogenic cooling working medium again.

Preferably, the working medium conveying pipeline further comprises a first conveying pipeline, the two ends of the first conveying pipeline are respectively connected with the outlet of the condenser and the inlet of the cooler, a first isolation valve is arranged on the first conveying pipeline, the condenser, the first conveying pipeline, the first return pipeline and the cooler jointly form a separated heat pipe loop, and the separated heat pipe loop is used for introducing the low-temperature cooling working medium prepared in the condenser into the cooler for heat exchange and returning the cooling working medium after heat exchange to the condenser to prepare the low-temperature cooling working medium again.

Preferably, the compression refrigeration device comprises a compressor, a gas-liquid separator and an oil separator, wherein an inlet of the gas-liquid separator is connected with the second return pipeline, a gas-phase outlet of the gas-liquid separator is connected with the compressor, the gas-liquid separator is used for separating and removing liquid phase substances in cooling working media output by heat exchange in the cooler, the separated gas phase substances are introduced into the compressor again for compression refrigeration, an inlet of the oil separator is connected with the compressor and used for separating oil in the cooled working media after refrigeration, and an oil outlet of the oil separator is connected with the compressor through an oil return pipeline so as to return the separated oil to the compressor for reuse.

Preferably, the system further comprises a first temperature detector, a second temperature detector and a controller, wherein the first temperature detector is electrically connected with the controller, is arranged in a cooling chamber of the cooler, and is used for detecting the indoor temperature and transmitting a detected first temperature value to the controller;

the second temperature detector is electrically connected with the controller, is arranged outdoors, and is used for detecting the outdoor temperature and transmitting a second temperature value obtained by detection to the controller;

the controller is further electrically connected with the first isolation valve, the second isolation valve, the third isolation valve, the compressor and the pump respectively, and is used for comparing the first temperature value with the second temperature value and controlling the on-off of the separated heat pipe loop, the pump driving loop heat pipe loop and the steam compression type refrigeration loop respectively according to the comparison result.

Preferably, the condenser is disposed at a position higher than that of the cooler.

Preferably, a throttling device is further arranged on the third conveying return pipeline and used for reducing the pressure of the cooling working medium;

the system further comprises a liquid storage tank and a condensation fan, wherein an inlet of the liquid storage tank is connected with an outlet of the condenser, an outlet of the liquid storage tank is connected with inlet ends of the first conveying pipeline, the second conveying pipeline and the third conveying pipeline respectively, and the condensation fan is used for cooling the condenser.

Preferably, the condenser is a finned heat exchanger, and the pump is a centrifugal pump, an axial flow pump or a mixed flow pump.

Preferably, the air conditioning unit further comprises a filter, a heater, a humidifier and a fan, wherein an inlet of the cooler is connected with an outdoor environment through the heater and the filter, and is used for introducing air from the outdoor to the cooler for heat exchange and filtering and heating the introduced air before heat exchange; the outlet of the cooler is connected with the room through the humidifier and the fan, and is used for introducing the air subjected to heat exchange in the cooler into the room and increasing the humidity of the air before the air is introduced into the room.

According to another aspect of the invention, the invention provides an air conditioner refrigeration method, which adopts the technical scheme that:

an air-conditioning refrigeration method for refrigerating rooms of a nuclear power plant is characterized in that by adopting the air-conditioning cooling system,

when the temperature difference between the room temperature and the external temperature is more than or equal to 5 ℃, the second isolation valve and the pump are opened, so that the pump drives the loop of the loop heat pipe to operate;

and when the temperature difference between the room temperature and the external temperature is less than 5 ℃, the third isolating valve and the compression refrigerating device are opened to enable the steam compression type refrigerating circuit to operate.

According to another aspect of the invention, the invention provides an air conditioner refrigeration method, which adopts the technical scheme that:

an air-conditioning refrigeration method is used for refrigerating rooms of a nuclear power plant, adopts the air-conditioning cooling system,

when the temperature difference between the room temperature and the external temperature is more than 15 ℃, opening a first isolation valve and a second isolation valve to enable the separated heat pipe loop to operate;

when the temperature difference between the room temperature and the external temperature is 5-15 ℃, the second isolation valve and the pump are opened, so that the pump drives the loop of the loop heat pipe to operate;

and when the temperature difference between the room temperature and the external temperature is less than 5 ℃, the third isolating valve and the compression refrigerating device are opened to enable the steam compression type refrigerating circuit to operate.

According to the air conditioner cooling system, the plurality of cooling working medium loops of different types are arranged, and the appropriate cooling working medium loop can be flexibly selected according to different use conditions (indoor and outdoor temperatures), so that a natural cold source is fully utilized, the power consumption is greatly reduced, and the energy conservation and emission reduction are facilitated.

The air conditioner refrigeration method can fully utilize natural cold source due to the adoption of the air conditioner cooling system, greatly reduce energy consumption and facilitate energy conservation and emission reduction.

Drawings

FIG. 1 is a schematic diagram of an air conditioning cooling system according to an embodiment of the present invention;

fig. 2 is another schematic structural diagram of an air-conditioning cooling system in the embodiment of the invention.

In the figure: 1-an air conditioning unit; 2-a filter; 3-a heater; 4-a cooler; 5, a humidifier; 6, a fan; 7-a pump; 8-a check valve; 9-a first isolation valve; 10-a throttling device; 11-a third isolation valve; 12-a second isolation valve; 13-an oil separator; 14-a compressor; 15-a vapor-liquid separator; 16-a liquid storage tank; 17-a condenser; 18-a condensing fan; 19-oil return line; 20-fresh air cell; 21-a controller; 22-a second temperature detector; 23-a first temperature detector; 24-a room; 25-a first transfer line; 26 a second transfer line; 27-a third transfer line; 28-a first return line; 29-second return line.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly or removably connected, or integrally connected; either directly or indirectly through intervening media, or through the interconnection of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

Example 1

As shown in fig. 1, the present embodiment discloses an air-conditioning cooling system, which includes an air-conditioning unit 1, a condenser 17, a working medium delivery pipeline, and a working medium return pipeline, wherein:

the air conditioning unit 1 comprises a cooler 4, and the cooler 4 is used for refrigerating;

the working medium conveying pipeline comprises a first conveying pipeline 25, a second conveying pipeline 26 and a third conveying pipeline 27, the working medium return pipeline comprises a first return pipeline 28 and a second return pipeline 29, wherein two ends of the first conveying pipeline 25 are respectively connected with an outlet of the condenser 17 and an inlet of the cooler 4, two ends of the first return pipeline 28 are respectively connected with an outlet of the cooler 4 and an inlet of the condenser 17, the first conveying pipeline 25 is provided with a first isolation valve 9, and the condenser 17, the first conveying pipeline 25, the first return pipeline 28 and the cooler 4 jointly form a separated heat pipe loop; two ends of a second conveying pipeline 26 are respectively connected with an outlet of the condenser 17 and an inlet of the cooler 4, a pump is arranged on the second conveying pipeline 26, a second isolation valve 12 is arranged on the first return pipeline 28, and the condenser 17, the second conveying pipeline 26, the first return pipeline 28 and the cooler 4 form a pump driving loop heat pipe loop together; the two ends of the third conveying pipeline 27 are respectively connected with the outlet of the condenser 17 and the inlet of the cooler 4, the two ends of the second return pipeline 29 are respectively connected with the outlet of the cooler 4 and the inlet of the condenser 17, the third conveying pipeline 27 is provided with a third isolation valve 11, the second return pipeline 29 is provided with a compression refrigerating device, the separated heat pipe loop, the pump driving loop heat pipe loop and the vapor compression refrigerating loop are all used for introducing the low-temperature cooling working medium prepared in the condenser 17 into the cooler 4 to exchange heat with air, and the cooling working medium after heat exchange is returned to the condenser 17 to prepare the low-temperature cooling working medium again.

According to the system, the first isolation valve 9, the second isolation valve 12, the third isolation valve 11, the compressor 14 and the pump 7 are controlled to be opened and closed, different cooling working medium loops can be flexibly selected according to indoor and outdoor temperature conditions to provide low-temperature cooling working media for the cooler 4 of the air conditioning unit 1, so that energy consumption can be effectively reduced, natural cold sources in the external environment can be fully utilized, and energy conservation and emission reduction are achieved.

Specifically, when the first isolation valve 9 and the second isolation valve 12 are opened, the third isolation valve 11, the compressor 14 and the pump 7 are closed, the separated heat pipe loop is put into operation, at the moment, the cooling working medium naturally flows in the separated heat pipe loop, the cooling working medium exchanges heat with the external environment and cools down when flowing through the condenser 17 to obtain a low-temperature cooling medium, the low-temperature cooling medium exchanges heat with air circulating in an air channel in the cooler 4 and heats up when flowing through the cooler 4, and the heated cooling working medium returns to the condenser 17 to exchange heat with the external environment and cools down to realize circulation. The separated heat pipe loop is suitable for being used when the indoor and outdoor temperature difference is large, the cooling working medium is driven to naturally flow through the indoor and outdoor temperature difference, for example, when the external environment is a low-temperature environment of minus 40 ℃, so that a natural cold source is fully utilized, and power consumption is not needed.

When the second isolation valve 12 and the pump 7 are opened, the first isolation valve 9, the third isolation valve 11 and the compressor 14 are closed, the pump-driven heat pipe loop is put into operation, and at the moment, the cooling working medium is driven by the pump 7 to forcibly flow in the pump-driven heat pipe loop.

When the third isolation valve 11 and the compressor 14 are opened, the second isolation valve 12, the third isolation valve 11 and the pump 7 are closed, and the vapor compression refrigeration loop is put into operation, at the moment, the heat exchange temperature reduction in the condenser 17 is carried out to obtain a low-temperature cooling medium which exchanges heat with air circulating in an air channel in the cooler 4 when flowing through the cooler 4 to carry out temperature rise, the warmed cooling working medium is firstly introduced into the compression refrigeration device to carry out compression refrigeration, and the cooled cooling working medium returns to the condenser 17 to realize circulation.

It should be noted that, in addition to the three cooling medium circuits in the present embodiment being capable of operating individually under different indoor and outdoor temperature difference conditions, the three cooling medium circuits may also be operated cooperatively according to actual conditions, for example, when the separate heat pipe circuit is not enough to provide the cooling load required by the cooler 4, the pump-driven heat pipe circuit and/or the vapor compression refrigeration circuit may also be operated simultaneously.

In some embodiments, the cooling working medium is a low boiling point working medium, and may be a single working medium or a mixture of multiple single working media. In this embodiment, the cooling medium is preferably freon.

In some embodiments, the compression refrigeration device comprises a compressor 14, a gas-liquid separator and an oil separator 13, wherein an inlet of the gas-liquid separator is connected with the second return pipeline, a gas-phase outlet of the gas-liquid separator is connected with the compressor 14, the gas-liquid separator is used for separating and removing liquid phase substances in a cooling working medium output by heat exchange in the cooler 4, the gas-liquid separator is introduced into the compressor 14 for compression refrigeration after separation, and the gas-liquid separator can prevent liquid impact caused by liquid entrainment in a gas sucked by the compressor 14; the inlet of the oil separator 13 is connected to the compressor 14 for separating oil from the refrigerated cooling medium, and the oil outlet of the oil separator 13 is connected to the oil return of the compressor 14 via an oil return line 19 for returning the separated oil to the compressor 14 for reuse. In the present embodiment, the oil outlet of the oil separator 13 is provided at the bottom of the oil separator 13.

In some embodiments, the present system further comprises a first temperature detector 23, a second temperature detector 22, and a controller 21, wherein: the first temperature detector 23 is electrically connected to the controller 21, is provided in a room where the cooler 4 is used for cooling (i.e., in the room 24), and is configured to detect a temperature in the room and transmit a detected first temperature value to the controller 21; a second temperature detector 22 electrically connected to the controller 1, provided outdoors, for example, in the vicinity of the condenser 17, for detecting the outdoor temperature and transmitting a detected second temperature value to the controller 21; the controller 21 is further configured to compare the received first temperature value with the second temperature value, and respectively control the opening and closing of the separate heat pipe loop, the pump driving loop heat pipe loop, and the vapor compression refrigeration loop according to a comparison result between the first temperature value and the second temperature value. That is, the system can realize the interlocking control of the on-off of the separated heat pipe loop, the pump driving heat pipe loop and the vapor compression refrigeration loop according to the indoor and outdoor temperatures.

Specifically, when the temperature difference between the first temperature value and the second temperature value is greater than 15 ℃, the controller 21 controls the first isolation valve 9 and the second isolation valve 12 to be opened, controls the third isolation valve 11, the compressor 14 and the pump 7 to be closed, and independently puts the separated heat pipe loop into operation, and at the moment, the separated heat pipe loop is adopted to provide a low-temperature cooling working medium for the cooler 4; when the temperature difference between the first temperature value and the second temperature value is 5-15 ℃, the controller 21 controls the second isolation valve 12 and the pump 7 to be opened, controls the first isolation valve 9, the third isolation valve 11 and the compressor 14 to be closed, and drives the heat pipe loop to be independently put into operation, and at the moment, the pump 7 is adopted to drive the heat pipe loop to provide low-temperature cooling working medium for the cooler 4; when the temperature difference between the first temperature value and the second temperature value is less than 5 ℃, the controller 21 controls the third isolation valve 11 and the compressor 14 to be opened, controls the second isolation valve 12, the third isolation valve 11 and the pump 7 to be closed, and controls the steam compression type refrigeration loop to be independently put into operation, and at the moment, the steam compression type refrigeration loop is adopted to provide low-temperature cooling working media for the cooler 4.

In some embodiments, in order to ensure the circulation of the separated heat pipe loop, the condenser 17 is arranged at a position higher than the cooler 4, more precisely, the lowest point of the condenser 17 is higher than the highest point of the cooler 4, and the connecting pipe between the two should be as short and straight as possible.

In some embodiments, a throttling device 10 is further disposed on the third return delivery line, and the throttling device 10 can throttle the high-pressure liquid into a low-pressure liquid, so as to reduce the pressure of the cooling working medium. Specifically, the economizer may be an expansion valve, a capillary tube, or an orifice plate.

In some embodiments, the system further comprises a liquid storage tank 16 for storing low-temperature cooling medium, an inlet of the liquid storage tank 16 is connected to an outlet of the condenser 17, and outlets of the liquid storage tank 16 are respectively connected to inlet ends of the first delivery line 25, the second delivery line 26, and the third delivery line 27, so as to introduce the low-temperature cooling medium into the cooler 4 through different cooling medium circuits for use.

In some embodiments, the condenser 17 is a finned heat exchanger, and the number of the finned heat exchangers may be one or more. When the number of the condensers 17 is plural, the plural condensers 17 may be connected in parallel or in series.

In some embodiments, the system further includes a condensing fan 18, and the condensing fan 18 is used for ventilating and radiating heat to the fin heat exchanger, so that the cooling working medium in the condenser 17 is rapidly cooled and condensed into a liquid state. Specifically, the condensing fan 18 is disposed near the fin heat exchanger, and the number of the condensing fans 18 may be one or more.

Certainly, the fin type heat exchanger can also adopt water spraying type evaporative cooling, namely the system can also comprise a sprayer for spraying water to the fin type heat exchanger and absorbing the heat of a cooling working medium in the fin type heat exchanger through water evaporation.

In some embodiments, the pump 7 may be a centrifugal pump, an axial pump, or a mixed-flow pump.

In some embodiments, a check valve 8 is also provided on the second transfer line 26, and the check valve 8 is downstream of the pump 7.

In some embodiments, the air conditioning assembly further comprises a filter 2, a heater 3, a humidifier 5, and a fan 6, wherein: the inlet of the cooler 4 is connected with the outdoor environment through the heater 3 and the filter 2, and is used for introducing air from the outdoor to the cooler 4 for heat exchange and filtering and heating the introduced air before heat exchange; the outlet of the cooler 4 is connected with the room through a humidifier and a fan 6, and is used for introducing the air subjected to heat exchange in the cooler 4 into the room and increasing the humidity of the air before introducing the air into the room.

Specifically, the inlet of the filter 2 is connected with a fresh air chamber 20, the fresh air chamber 20 is connected with the outdoor environment, and the filter 2 is used for filtering the introduced air; an inlet of the heater 3 is connected with an outlet of the filter 2, an outlet of the heater 3 is connected with an inlet of the cooler 4, the heater 4 is used for heating filtered air, and the air and a cooling working medium are subjected to heat exchange and temperature reduction in the cooler 4; the outlet of the cooler 4 is connected with the humidifier 5, and the humidifier 5 is used for increasing the humidity of the cooled air; the inlet of the fan 6 is connected with the outlet of the humidifier 5, the outlet of the fan is connected with the room so as to lead the cooled air into the room, and the fan 6 is used for providing driving force required by air circulation.

The air conditioning unit 1 in the present embodiment may be any other unit that requires cooling, and is not limited to the above configuration.

The air conditioner cooling system of this embodiment through with disconnect-type heat pipe loop, pump drive heat pipe loop and the coupling of vapor compression refrigeration return circuit, can be according to indoor outer temperature, select for use in a flexible way suitable cooling working medium return circuit to but the make full use of nature cold source reduces power consumption greatly, is favorable to energy saving and emission reduction.

Example 2

The embodiment discloses an air-conditioning refrigeration method for refrigerating rooms of a nuclear power plant, which adopts the air-conditioning cooling system of embodiment 1, wherein:

when the temperature difference between the room temperature and the external temperature is more than or equal to 15 ℃, a first isolation valve and a second isolation valve are opened to enable the separated heat pipe loop to be put into operation, at the moment, a cooling working medium circularly flows in the separated heat pipe loop, when the cooling working medium flows through a condenser, the cooling working medium exchanges heat with a natural cold source in the outdoor environment and then is cooled to obtain a low-temperature cooling working medium, then the low-temperature cooling working medium exchanges heat with air in a cooler, so that the air is cooled when flowing through the cooler, and the cooled air is introduced into the room to realize refrigeration;

when the temperature difference between the room temperature and the external temperature is 5-15 ℃, a second isolation valve and a pump are opened, so that a heat pipe loop of a pump driving loop is put into operation, at the moment, a cooling working medium circularly flows in the heat pipe loop of the pump driving loop, and compared with a separated heat pipe loop, the heat pipe loop of the pump driving loop is characterized in that the pump provides power required by the circulating flow of the cooling working medium, the cooling working medium forcibly flows under the action of the pump, the operation of the pump needs energy consumption, and the cooling working medium in the separated heat pipe loop naturally flows by the temperature difference between the indoor and the outdoor without energy consumption;

when the temperature difference between the room temperature and the external temperature is less than 5 ℃, a third isolating valve and a compression refrigerating device are opened, a steam compression refrigerating loop is enabled to be put into operation, at the moment, a cooling working medium circularly flows in the steam compression refrigerating loop, when the low-temperature cooling working medium flows through a cooler 4, heat exchange is carried out between the low-temperature cooling working medium and air flowing through the cooler, the air is cooled, the cooling working medium is heated after heat exchange, the heated cooling working medium is firstly introduced into the compression refrigerating device for compression refrigeration, and the cooled cooling working medium returns to a condenser 17 to prepare the low-temperature cooling working medium again, so that circulation is achieved.

The air conditioner refrigeration method of the embodiment adopts the air conditioner cooling system of the embodiment 1, so that a natural cold source can be fully utilized, the energy consumption is greatly reduced, and the energy conservation and emission reduction are facilitated.

Example 3

As shown in fig. 2, the present embodiment discloses an air-conditioning cooling system, which is different from embodiment 1 in that: the system omits a separate heat pipe loop, and the heat pipe loop is driven by the pump 7 to be coupled with the vapor compression refrigeration loop to circularly supply cold for the cooler 4, so that the system is particularly suitable for being used when the separate heat pipe loop is difficult to meet the cold load requirement of the cooler 4.

The air conditioner cooling system of this embodiment, through with pump drive heat pipe loop and the coupling of vapor compression formula refrigeration return circuit, can select for use suitable cooling medium return circuit in a flexible way according to indoor outer temperature to reduce power consumption greatly, and effectively utilize natural cold source, be favorable to energy saving and emission reduction.

Example 4

The embodiment discloses an air-conditioning refrigeration method for refrigerating rooms of a nuclear power plant, which is different from the embodiment 2 in that: embodiment 2 employs the air-conditioning cooling system of embodiment 1, and the present embodiment employs the air-conditioning cooling system of embodiment 3, wherein:

when the temperature difference between the room temperature and the external temperature is more than or equal to 5 ℃, a second isolation valve and a pump are opened, so that a heat pipe loop of a pump driving loop is put into operation, at the moment, a cooling working medium circularly flows in the heat pipe loop of the pump driving loop, and compared with a separated heat pipe loop, the heat pipe loop of the pump driving loop is characterized in that the pump provides power required by the circulating flow of the cooling working medium, the cooling working medium forcibly flows under the action of the pump, the operation of the pump needs energy consumption, and the cooling working medium in the separated heat pipe loop naturally flows by the temperature difference between the indoor and the outdoor without energy consumption;

when the temperature difference between the room temperature and the external temperature is less than 5 ℃, a third isolating valve and a compression refrigerating device are opened, a steam compression refrigerating loop is enabled to be put into operation, at the moment, a cooling working medium circularly flows in the steam compression refrigerating loop, when the low-temperature cooling working medium flows through a cooler 4, heat exchange is carried out between the low-temperature cooling working medium and air flowing through the cooler, the air is cooled, the cooling working medium is heated after heat exchange, the heated cooling working medium is firstly introduced into the compression refrigerating device for compression refrigeration, and the cooled cooling working medium returns to a condenser 17 to prepare the low-temperature cooling working medium again, so that circulation is achieved.

According to the air conditioner refrigeration method, the air conditioner cooling system in the embodiment 3 is adopted, so that a natural cold source can be fully utilized, the energy consumption is greatly reduced, and the energy conservation and emission reduction are facilitated.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.