Low-noise low-temperature air source heating / cooling station

Abstract

The invention discloses a low-noise and low-temperature air source heating / cooling station, and relates to the technical field of air source heat pumps, in particular to the low-noise and low-temperature air source heating / cooling station suitable for heating and cooling in industrial, commercial and cold areas. An outdoor unit and an indoor unit are fixed on the same base; the indoor unit adopts a high-pressure polyurethane foaming panel, and is internally provided with a compressor and a shell and tube heat exchanger which are integrated with a water system, an electric control system and a fluorine system; an axial flow fan is arranged on a top shell of the outdoor unit; a condenser of the fluorine system is arranged on the upper middle portion of the outdoor unit, and other fluorine system components except the compressor, the shell-and-tube heat exchanger and the condenser are arranged on the lower portion of the condenser. According to the technical scheme, the problems that in the prior art, low-temperature operation efficiency is low, noise pollution is serious, installation is complex, and maintenance is inconvenient are solved.

Description

Technical Field

[0001] The invention discloses a low-noise, low-temperature air source heating / cooling station, which relates to the technical field of air source heat pumps, and in particular to a low-noise, low-temperature air source heating / cooling station suitable for heating and cooling in industry, commerce and cold regions. Background Art

[0002] As an efficient and energy-saving heating and cooling equipment, air source heat pumps have been widely used in industrial and commercial fields. Its working principle is to absorb heat energy from the air and transfer the heat to the user end through the heat pump system to achieve heating or cooling. However, when the existing air source heat pump system is operated in a low temperature environment, there are the following problems: Low efficiency in low-temperature operation: When a traditional air source heat pump is operated in an ultra-low temperature environment (such as below -35°C), the heating efficiency drops significantly, or even fails to operate normally. This limits its application in cold regions.

[0003] Serious noise pollution: The core components such as compressors and water pumps generate a lot of noise during operation, which affects the use environment, especially in commercial or residential areas that require a quiet environment.

[0004] Complex installation: Traditional systems require on-site installation of water system components, which requires a large amount of construction and a long installation period. In addition, improper installation can easily affect the reliability of system operation.

[0005] Inconvenient maintenance: Problems such as scale formation and component damage in the water system require frequent maintenance, which increases operating costs and difficulty of use.

[0006] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of low-noise, low-temperature air source heating / cooling station to overcome the problems existing in the prior art. Summary of the invention

[0007] In view of the technical problems of low-temperature operation efficiency, serious noise pollution, complex installation and inconvenient maintenance proposed in the above-mentioned prior art, a low-noise low-temperature air source heating / cooling station is provided. The present invention mainly optimizes the system design and component layout, significantly improves the operating efficiency in a low-temperature environment, reduces noise, and simplifies the installation process, thereby meeting the heating and cooling needs of industry, commerce and cold areas.

[0008] The technical means adopted by the present invention are as follows: A low-noise, low-temperature air source heating / cooling station, comprising: an indoor unit and an outdoor unit; characterized in that: The outdoor unit and the indoor unit are fixed on the same base, so that the unit does not need to be disassembled during overall transportation, which improves installation convenience and reduces on-site construction difficulty; Furthermore, the indoor unit adopts a high-pressure polyurethane foam panel, which is equipped with an integrated water system and an electronic control system, the indoor unit reduces operating noise, and integrates components that may generate noise, such as a water pump and a compressor, to form a closed sound insulation structure, thereby effectively reducing the noise impact on the environment when the unit is running; as well as the compressor, four-way reversing valve and shell and tube heat exchanger of the fluorine system, the electronic control system is used to control the operation of the fluorine system and the water system to achieve low-temperature heating or cooling; Furthermore, an axial flow fan is provided on the top shell of the outdoor unit; Furthermore, the condenser of the fluorine system is arranged in the upper middle part of the outdoor unit, and other fluorine system components except the compressor, four-way reversing valve, shell and tube heat exchanger and condenser are arranged in the lower part of the condenser to absorb heat in the air or release heat, so that the system can operate stably under -35°C conditions.

[0009] Further, the fluorine system includes: a condenser, a compressor, a shell and tube heat exchanger, a four-way reversing valve, a low-pressure differential pressure switch, a gas-liquid separator, a low-pressure pressure sensor, a high-pressure differential pressure switch, a liquid reservoir, an electronic expansion valve and an economizer and other components, which are used to achieve air source heat / cold conversion in a low-temperature environment; further, the condenser is multiple, and is evenly arranged in the middle and upper part of the outdoor unit; Furthermore, the lower part of each condenser is provided with an economizer, a gas-liquid separator, and a liquid storage device which are connected in sequence; Further, the compressor and the shell and tube heat exchanger are arranged in the indoor unit; Further, the gas-liquid separator, the economizer, the compressor and the shell-and-tube heat exchanger are connected via a four-way reversing valve; Further, the liquid reservoir is connected to the shell and tube heat exchanger; Furthermore, a low-pressure differential pressure switch is provided on the pipeline connecting the low-pressure end of the compressor and the gas-liquid separator, and a high-pressure differential pressure switch is provided on the pipeline connecting the high-pressure end and the four-way reversing valve; Furthermore, a low-pressure pressure sensor is provided on the pipeline between the gas-liquid separator and the four-way reversing valve; Furthermore, an electronic expansion valve is provided on the pipeline between the liquid storage device and the condenser.

[0010] Furthermore, the compressor adopts an ultra-low temperature air-supply and reheat-increasing compressor, and performs intermediate air supply through an economizer, so that the unit can operate stably at a low ambient temperature of -35°C, ensuring the heating capacity under severe cold conditions.

[0011] Further, a water system is provided between the shell and tube heat exchanger and the external water supply pipeline and the external water return pipeline; Furthermore, the water system includes: a shock-absorbing hose, a stop valve, a thermometer, a pressure gauge, an auxiliary heater, a ball valve, a pressure differential bypass valve, a drain valve, a closed water tank, an automatic exhaust valve, a constant pressure water replenisher, a water softening device, a filter, and a water pump, which are used to realize the transportation and circulation of hot or cold water; Furthermore, a pressure gauge, a temperature gauge, a stop valve, and a shock-absorbing throat are sequentially arranged between the external water supply pipeline and the shell and tube heat exchanger; the auxiliary heat exchanger is connected in parallel with the pipeline in front of the pressure gauge, and a ball valve is arranged on the connecting pipeline; Furthermore, a closed water tank, a pressure gauge, a stop valve, a filter, a shock absorber, a water pump, a shock absorber, a stop valve, a pressure gauge, a temperature gauge, a stop valve and a shock absorber are sequentially arranged between the external return water pipeline and the shell and tube heat exchanger; a constant pressure water replenisher and a water softener, as well as an automatic exhaust valve, are arranged between the closed water tank and the pressure gauge; Furthermore, a drain valve is provided between the closed water tank and the external water return pipeline; Furthermore, a pressure differential bypass valve is provided between the external water supply pipeline and the external water return pipeline; Furthermore, the pipelines in front of the stop valves on the two pipelines in the front part of the shell and tube heat exchanger are connected and are equipped with stop valves.

[0012] Furthermore, a plurality of water pumps are arranged in parallel; Furthermore, a set of shock-absorbing throats and stop valves are respectively provided in front and behind the water pump, which can realize two-in-one backup and improve the convenience of system maintenance and operational reliability.

[0013] Furthermore, the water pumps and compressors are arranged diagonally within the station.

[0014] Furthermore, the electronic control system adopts PLC control to carry out linkage control of the fluorine system and the water system, and automatically adjusts the operating status according to the set parameters, thereby improving the intelligence level of the unit.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The low-noise, low-temperature air source heating / cooling station provided by the present invention adopts a high-pressure polyurethane foam panel for the indoor unit, and arranges noise sources such as compressors and water pumps therein to form a closed sound insulation structure to reduce the noise during the operation of the unit; 2. The low-noise, low-temperature air source heating / cooling station provided by the present invention adopts an ultra-low-temperature air-supplementing and enthalpy-increasing compressor in the fluorine system, and performs intermediate air-supplementing through an economizer, so that the unit can operate stably at a low ambient temperature of -35°C, ensuring the heating capacity under severe cold conditions; 3. The low-noise, low-temperature air source heating / cooling station provided by the present invention has an outdoor unit and an indoor unit fixed on the same base, so that the unit does not need to be disassembled during overall transportation, thereby improving installation convenience and reducing on-site construction difficulty; 4. The low-noise, low-temperature air source heating / cooling station provided by the present invention has a water system integrated into the indoor unit, which reduces the amount of on-site construction and does not require the installation of additional components such as water pumps and closed water tanks, thereby improving the degree of system integration; 5. The low-noise, low-temperature air source heating / cooling station provided by the present invention adopts PLC control for the electric control system, which can link the fluorine system and the water system, and can automatically adjust the operating state according to the set parameters, thereby improving the intelligent level of the unit; 6. The low-noise, low-temperature air source heating / cooling station provided by the present invention has an auxiliary heater in the water system, which can assist in heating the water temperature in an ultra-low temperature environment, ensure the stability of the outlet water temperature, and improve the operating reliability under extreme working conditions; 7. The low-noise, low-temperature air source heating / cooling station provided by the present invention has a shut-off valve in the water system, which can be used for water flushing after closing without damaging the shell and tube heat exchanger; 8. The low-noise, low-temperature air source heating / cooling station provided by the present invention has stop valves on both sides of the water pump, which can realize two-in-one backup, thereby improving the convenience of system maintenance and operational reliability; 9. The low-noise, low-temperature air source heating / cooling station provided by the present invention has a closed water tank for the water system, and is equipped with a water softening device and a constant-pressure water replenishment device to reduce scale formation, extend the service life of the unit, and improve the system operation stability; 10. The low-noise, low-temperature air source heat / cooling station provided by the present invention is integrated inside the station, compared with the closed water tank placed outside the station: the fluorine system transfers heat energy to the water in the shell and tube heat exchanger. This part of the water with heat energy can reach the closed water tank through a very short distance, which has the advantages of greatly improving the heat loss coefficient; reducing the refrigerant filling amount by about 50%; shortening the heat transfer path length by about 90%; and shortening the time to heat up to 50°C by about 60%; 11. The low-noise, low-temperature air source heating / cooling station provided by the present invention can dynamically adjust the coordination ratio of the compressor frequency and the water pump speed due to the shortened water system path. For every 10% increase in the compressor speed, the water pump speed will be synchronously increased by 8%. If the closed water tank is outside the station, this control system will be greatly affected and difficult to implement. 12. The low-noise, low-temperature air source heating / cooling station provided by the present invention has a closed water tank that adds a coating or heat storage material after generating heat. When the unit is in a low-temperature working condition at night, it stores heat during the day to perform anti-freezing operation at night; 13. In the low-noise, low-temperature air source heating / cooling station provided by the present invention, the water pump and the compressor are arranged diagonally in the station. After three-dimensional vibration spectrum comparison, the vibration troughs of the two are superimposed, the vibration acceleration of the entire station is reduced, and the noise is reduced.

[0016] In summary, the application of the technical solution of the present invention solves the problems of low low-temperature operation efficiency, serious noise pollution, complex installation and inconvenient maintenance in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is a schematic diagram of the layout of the unit of the present invention; Figure 2 This is a top view of the upper layer of the unit of the present invention; Figure 3 This is a top view of the lower layer of the unit of the present invention; Figure 4 This is the principle diagram of the fluorine system of the present invention; Figure 5 for Figure 1 A magnified view of part A; Figure 6 It is the principle diagram of the water system of the present invention.

[0019] In the figure: 1. outdoor unit; 2. indoor unit; 3. axial flow fan; 4. fluorine system; 41. condenser; 42. compressor; 43. shell and tube heat exchanger; 44. four-way reversing valve; 45. low pressure differential switch; 46. gas-liquid separator; 47. low pressure pressure sensor; 48. high pressure differential switch; 49. liquid storage tank; 410. electronic expansion valve; 411. economizer; 5. water system; 51. shock absorber throat; 52. stop valve; 53. thermometer; 54. pressure gauge; 55. auxiliary heater; 56. ball valve; 57. pressure differential bypass valve; 58. drain valve; 59. closed water tank; 510. automatic exhaust valve; 511. constant pressure water replenisher; 512. soft water equipment; 513. filter; 514. water pump; 6. electronic control system; 7. external water supply pipeline; 8. external return pipeline. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0024] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0025] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0026] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0027] Example 1 like Figure 1-4 As shown, the present invention provides a low-noise, low-temperature air source heating / cooling station, including: an indoor unit and an outdoor unit; the outdoor unit 2 and the indoor unit 1 are fixed on the same base, so that the unit does not need to be disassembled during overall transportation, thereby improving installation convenience and reducing on-site construction difficulty; the indoor unit 2 adopts a high-pressure polyurethane foam panel, in which an integrated water system 5 and an electric control system 6 are provided, and the indoor unit 2 reduces operating noise, and integrates components that may generate noise, such as a water pump 514 and a compressor 42, to form a closed sound insulation structure, thereby effectively reducing the noise impact of the unit on the environment during operation; As well as the compressor 42, four-way reversing valve 44 and shell and tube heat exchanger 43 of the fluorine system 4, the electronic control system 6 is used to control the operation of the fluorine system 4 and the water system 5 to achieve low-temperature heating or cooling; an axial flow fan 3 is arranged on the top shell of the outdoor unit 1; the condenser 41 of the fluorine system 4 is arranged in the middle and upper part of the outdoor unit 1, and other fluorine system 4 components except the compressor 42, four-way reversing valve 44, shell and tube heat exchanger 43 and condenser are arranged in the lower part of the condenser 41, which is used to absorb heat in the air or release heat, so that the system can operate stably under -35°C conditions.

[0028] like Figure 1 , 4As shown, the fluorine system 4 includes: a condenser 41, a compressor 42, a shell and tube heat exchanger 43, a four-way reversing valve 44, a low-pressure differential pressure switch 45, a gas-liquid separator 46, a low-pressure pressure sensor 47, a high-pressure differential pressure switch 48, a liquid reservoir 49, an electronic expansion valve 410 and an economizer 411 and other components, which are used to realize air source heat / cold conversion in a low-temperature environment; there are multiple condensers 41, which are evenly arranged in the middle and upper part of the outdoor unit 1; the lower part of each condenser 41 is provided with an economizer 411, a gas-liquid separator 46, and a liquid reservoir 49 connected in sequence; the compressor 42 and the shell and tube heat exchanger 43 are arranged Placed in the indoor unit 2; the gas-liquid separator 46, the economizer 411 are connected with the compressor 42 and the shell and tube heat exchanger 43 through the four-way reversing valve 44; the liquid reservoir 49 is connected with the shell and tube heat exchanger 43; a low-pressure differential pressure switch 45 is provided on the pipeline connecting the low-pressure end of the compressor 42 and the gas-liquid separator 46, and a high-pressure differential pressure switch 48 is provided on the pipeline connecting the high-pressure end and the four-way reversing valve 44; a low-pressure pressure sensor 47 is provided on the pipeline between the gas-liquid separator 46 and the four-way reversing valve 44; an electronic expansion valve 410 is provided on the pipeline between the liquid reservoir 49 and the condenser 41.

[0029] Compressor 42 uses an ultra-low temperature air-supply reheat compressor and uses an economizer for intermediate air supply, so that the unit can operate stably at a low ambient temperature of -35°C, ensuring the heating capacity under severe cold conditions.

[0030] like Figure 1 , 6As shown, the water system 5 is arranged between the shell and tube heat exchanger 43 and the external water supply pipeline 7 and the external return water pipeline 8; the water system 5 includes: a shock-absorbing throat 51, a stop valve 52, a thermometer 53, a pressure gauge 54, an auxiliary heat device 55, a ball valve 56, a pressure difference bypass valve 57, a drain valve 58, a closed water tank 59, an automatic exhaust valve 510, a constant pressure water replenisher 511, a softening device 512, a filter 513, and a water pump 514, which are used to realize the transportation and circulation of hot water or cold water; a pressure gauge 54, a thermometer 53, a stop valve 52, and a shock-absorbing throat 51 are arranged in sequence between the external water supply pipeline 7 and the shell and tube heat exchanger 43; the auxiliary heat device 55 is connected in parallel with the pipeline before the pressure gauge 54, and a ball valve is arranged on the connecting pipeline. 56; a closed water tank 59, a pressure gauge 54, a stop valve 52, a filter 513, a shock absorber throat 51, a water pump 514, a shock absorber throat 51, a stop valve 52, a pressure gauge 54, a thermometer 53, a stop valve 52 and a shock absorber throat 51 are sequentially arranged between the external return water pipeline and the shell and tube heat exchanger 43; a constant pressure water make-up device 511 and a water softening device 512, as well as an automatic exhaust valve 510 are arranged between the closed water tank 59 and the pressure gauge 54; a drain valve 58 is arranged between the closed water tank 59 and the external return water pipeline 8; a pressure difference bypass valve 57 is arranged between the external water supply pipeline 7 and the external return water pipeline 8; the pipelines in front of the stop valve 52 on the two front pipelines of the shell and tube heat exchanger 43 are connected and equipped with a stop valve 52.

[0031] The water pump 514 and the compressor 42 are arranged diagonally within the station.

[0032] like Figure 6 As shown, a plurality of water pumps 514 are arranged in parallel; a set of shock-absorbing throats 51 and stop valves 52 are respectively arranged in front and behind the water pump 514, so as to realize two-in-one backup and improve the convenience of system maintenance and operational reliability.

[0033] The electric control system 6 includes: a PLC controller, a sensor, a power module and a frequency converter, which are used for electrical signal processing and system automation control.

[0034] The PLC controller cooperates with the sensor network to perform linkage control on the fluorine system 4 and the water system 5, and automatically adjusts the operating status according to the set parameters, thereby improving the intelligence level of the unit and realizing intelligent operation management of the unit.

[0035] Example 2 (Based on Example 1,) the present invention also provides a low-noise, low-temperature air source heat / cooling station, and the water system design adopts a closed circulation structure to ensure the high efficiency and stability of heating and cooling. Main components: 1. Shell and tube heat exchanger: used for heat exchange between refrigerant and water system, adopting a high-efficiency heat exchange tube structure to improve heat exchange efficiency. 2. Auxiliary heat exchanger: auxiliary heating in a low temperature environment to prevent the water temperature from being too low and affecting the operation of the system. 3. Closed water tank: used to maintain the stability of the water capacity of the system to avoid the influence of heat exchange performance due to water volume fluctuations. 4. Soft water equipment: reduce scaling inside the water system and extend the service life of the heat exchange equipment. 5. Constant pressure water replenishment device: maintain the pressure balance of the water system, and is equipped with an automatic water replenishment function to cope with water loss in the system. Water flow path: the water supply end and the return water end are circulated by water pumps respectively, and are monitored and controlled by a pressure gauge (P), a temperature gauge (T) and related valves. Shut-off valves and filtering devices are provided on the water supply pipeline and the return water pipeline to prevent impurities from entering the heat exchange system. The control system dynamically adjusts the operating status of the pump based on sensor data to ensure stable water flow and optimize the energy efficiency of the unit.

[0036] Example 3 (Based on Example 1,) the present invention also provides a low-noise, low-temperature air source heating / cooling station, which optimizes the control logic according to the operating characteristics of low-temperature environments (-25°C to 10°C) to improve the adaptability and energy saving of the system. 1. Preheating mode start-up: When the ambient temperature is lower than -15°C, the electronic control system automatically activates the auxiliary heater to preheat the heat exchanger to prevent frosting from affecting the heat exchange efficiency. 2. Intelligent defrost management: Based on the feedback from the temperature sensor and the pressure sensor, the control system monitors the thickness of the frost layer in real time, and dynamically adjusts the defrost cycle to reduce unnecessary defrost operations to reduce energy consumption. 3. Dynamic adjustment of the compressor: A hierarchical start-up strategy is adopted to adjust the operating mode of the compressor according to the ambient temperature and load demand to avoid overload operation and improve system efficiency. 4. Fan frequency control: The fan in the outdoor unit area adopts frequency conversion adjustment to optimize heat exchange efficiency while reducing noise.

[0037] Example 4 (Based on Example 1,) the present invention also provides a low-noise, low-temperature air source heating / cooling station, which specially optimizes the noise reduction design to reduce the impact of the unit operation on the environment. 1. Fan optimization: Use a low-speed, large-blade fan to reduce wind noise. A guide grille is added at the fan outlet to reduce air turbulence noise. 2. Compressor shock absorption: The compressor is wrapped with noise reduction material to absorb the noise generated during operation. 3. Application of sound insulation materials: The unit uses high-pressure polyurethane foam panels to effectively prevent noise from affecting the external environment. 4. Intelligent operation strategy: Optimize the operating mode of the compressor, fan and water pump through the control system to reduce the noise output of the unit at partial load.

[0038] Example 5 (Based on Example 1,) the present invention also provides a low-noise, low-temperature air source heating / cooling station, which adopts an advanced intelligent control system to improve the automation level and operation and maintenance convenience of the unit. 1. Remote monitoring: The unit is equipped with an IoT module, which can monitor the operating status through the cloud platform and perform remote diagnosis. 2. Intelligent adjustment: Analyze the historical operating data of the unit through big data, optimize the control strategy, and improve overall energy efficiency. 3. Multiple protections: The unit has built-in high and low voltage protection, overload protection, anti-freeze protection and other functions to ensure stable operation of the system. 4. Adaptive load management: The control system adjusts the working mode of the compressor, fan and water pump according to the real-time operating conditions to meet different load requirements.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low noise, low temperature air source heating / cooling station, comprising: An indoor unit (2) and an outdoor unit (1); characterized in that: The outdoor unit (1) and the indoor unit (2) are fixed on the same base, so that the unit does not need to be disassembled during overall transportation, thereby improving installation convenience and reducing on-site construction difficulty; The indoor unit (2) adopts a high-pressure polyurethane foam panel, in which an integrated water system (5) and an electric control system (6) are arranged. The indoor unit (2) reduces operating noise and integrates components that may generate noise, such as a water pump (514) and a compressor (42), to form a closed sound insulation structure, thereby effectively reducing the noise impact on the environment during the operation of the unit; and the compressor (42), a four-way reversing valve (44) and a shell and tube heat exchanger (43) of the fluorine system (4); the electric control system (6) is used to control the operation of the fluorine system (4) and the water system (5) to achieve low-temperature heating or cooling; An axial flow fan (3) is provided on the top shell of the outdoor unit (1); The condenser (41) of the fluorine system (4) is arranged at the upper middle part of the outdoor unit (1), and other components of the fluorine system (4) except the compressor (42), the four-way reversing valve (44), the shell and tube heat exchanger (43) and the condenser are arranged at the lower part of the condenser (41) for absorbing heat from the air or releasing heat, so that the system can operate stably under -35°C working conditions.

2. The low noise, low temperature air source heating / cooling station according to claim 1, characterized in that: The fluorine system (4) comprises: a condenser (41), a compressor (42), a shell and tube heat exchanger (43), a four-way reversing valve (44), a low-pressure differential pressure switch (45), a gas-liquid separator (46), a low-pressure pressure sensor (47), a high-pressure differential pressure switch (48), a liquid storage device (49), an electronic expansion valve (410) and an economizer (411), and is used to realize air source heat / cold conversion in a low-temperature environment; The condenser (41) comprises a plurality of parts, which are evenly distributed in the middle and upper part of the outdoor unit (1); The lower part of each condenser (41) is provided with an economizer (411), a gas-liquid separator (46), and a liquid storage tank (49) which are connected in sequence; The compressor (42) and the shell and tube heat exchanger (43) are arranged in the indoor unit (2); The gas-liquid separator (46), economizer (411), compressor (42) and shell-and-tube heat exchanger (43) are connected via a four-way reversing valve (44); The liquid storage device (49) is connected to the shell and tube heat exchanger (43); A low-pressure differential pressure switch (45) is provided on the pipeline connecting the low-pressure end of the compressor (42) and the gas-liquid separator (46), and a high-pressure differential pressure switch (48) is provided on the pipeline connecting the high-pressure end and the four-way reversing valve (44); A low-pressure sensor (47) is provided on the pipeline between the gas-liquid separator (46) and the four-way reversing valve (44); An electronic expansion valve (410) is provided on the pipeline between the liquid storage device (49) and the condenser (41).

3. The low noise, low temperature air source heating / cooling station according to claim 2, characterized in that: The compressor (42) adopts an ultra-low temperature air-supply and heat-increasing compressor, and performs intermediate air supply through an economizer, so that the unit can operate stably at a low ambient temperature of -35°C, thereby ensuring the heating capacity under severe cold conditions.

4. The low noise, low temperature air source heating / cooling station according to claim 1, characterized in that: The water system (5) is arranged between the shell and tube heat exchanger (43) and the external water supply pipeline (7) and the external water return pipeline (8); The water system (5) comprises: a shock-absorbing throat (51), a stop valve (52), a temperature gauge (53), a pressure gauge (54), an auxiliary heater (55), a ball valve (56), a pressure difference bypass valve (57), a drain valve (58), a closed water tank (59), an automatic exhaust valve (510), a constant pressure water replenisher (511), a water softening device (512), a filter (513), and a water pump (514), and is used to realize the transportation and circulation of hot water or cold water; A pressure gauge (54), a temperature gauge (53), a stop valve (52), and a shock-absorbing throat (51) are sequentially arranged between the external water supply pipeline (7) and the shell-and-tube heat exchanger (43); the auxiliary heat exchanger (55) is connected in parallel to the pipeline in front of the pressure gauge (54), and a ball valve (56) is arranged on the connecting pipeline; A closed water tank (59), a pressure gauge (54), a stop valve (52), a filter (513), a shock absorber (51), a water pump (514), a shock absorber (51), a stop valve (52), a pressure gauge (54), a temperature gauge (53), a stop valve (52) and a shock absorber (51) are sequentially arranged between the external water return pipeline and the shell and tube heat exchanger (43); a constant pressure water replenisher (511) and a water softener (512), as well as an automatic exhaust valve (510) are arranged between the closed water tank (59) and the pressure gauge (54); A drain valve (58) is provided between the closed water tank (59) and the external water return pipeline (8); A pressure differential bypass valve (57) is provided between the external water supply pipeline (7) and the external water return pipeline (8); The pipelines in front of the stop valves (52) on the two pipelines in front of the shell and tube heat exchanger (43) are connected and are equipped with stop valves (52).

5. The low noise, low temperature air source heating / cooling station according to claim 4, characterized in that: The water pumps (514) are multiple and connected in parallel; A set of shock-absorbing throats (51) and stop valves (52) are respectively arranged at the front and rear of the water pump (514), so as to realize two-in-one backup and improve system maintenance convenience and operational reliability.

6. The low noise, low temperature air source heating / cooling station according to claim 4, characterized in that: The water pump (514) and the compressor (42) are arranged diagonally in the station.

7. The low noise, low temperature air source heating / cooling station according to claim 1, characterized in that: The electric control system (6) adopts PLC control to carry out linkage control of the fluorine system (4) and the water system (5), and automatically adjusts the operating state according to set parameters, thereby improving the intelligence level of the unit.

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