Vertical soil source coupled air source heat pump jet heat exchange system and control method

Abstract

The application discloses a vertical soil source coupled air source heat pump jet flow heat exchange system and a control method, which comprises a heat exchange pipeline and an air source heat pump outdoor unit, the heat exchange pipelines are arranged in a matrix mode, and the top of all the heat exchange pipelines is connected with a total header in common; a pressure stabilizing gas collecting cavity is arranged on the pipe opening of the total header, and a booster fan is arranged in the total header and located at the front end of the pressure stabilizing gas collecting cavity; a rectifying member is arranged in the pressure stabilizing gas collecting cavity, and the air source heat pump outdoor unit is arranged on the air outlet side of the pressure stabilizing gas collecting cavity; the air source heat pump outdoor unit is fixedly connected with the pressure stabilizing gas collecting cavity through a sealing frame, and a nozzle plate is fixedly arranged in the sealing frame; nozzle holes are arranged on the nozzle plate in a matrix mode, each nozzle hole is protruded towards the air outlet side and is contracted from the air inlet to the air outlet. The application aims to provide a heat exchange system which can stabilize and rectify air flow, collect and discharge condensate water, switch between different seasonal working conditions and has an abnormal protection mechanism.

Description

Technical Field

[0001] This invention relates to the field of renewable energy utilization technology, and in particular to a vertical soil source coupled air source heat pump jet heat exchange system and control method. Background Technology

[0002] Air source heat pumps use outdoor air as a low-grade heat source, offering advantages such as cleanliness and high efficiency, and are widely used in heating and cooling systems for residential and industrial buildings. However, in cold and humid regions, the evaporator of the outdoor unit of an air source heat pump is prone to frosting under low-temperature and high-humidity conditions in winter. This leads to increased thermal resistance on the air side, increased resistance on the wind side, and decreased heating capacity, potentially requiring frequent defrosting, thus causing a decline in system energy efficiency and operational stability. In soil-air heat exchange technology, horizontally buried heat exchangers typically suffer from large footprints, significant susceptibility to surface climate fluctuations, and insufficient stability of supply air temperature. Vertically buried soil-air heat exchange devices can utilize the relatively stable temperature field of deep soil, reducing the impact of surface climate changes, and have certain application advantages in cold regions. Some existing vertical soil-air heat exchange devices use a single vertical duct with an internal structure forming upper and lower channels and a drainage mechanism. Simultaneously, a guide shroud directs pre-treated air to the air inlet side of the outdoor unit, achieving coupling between soil-side pre-treatment and the outdoor unit.

[0003] However, the existing technology still has the following shortcomings: (1) The vertical soil-air heat exchange section mostly adopts a single tube internal structure to realize the division of the upper and lower channels. There are many internal components, which requires high processing, assembly and long-term reliability. It is not conducive to forming a pipe group with multiple vertical pipes and carrying out modular layout and capacity expansion; (2) The guide shroud or enclosure structure that introduces pretreated air into the outdoor unit is mostly in the form of macro-guide. It does not adequately consider the pressure stabilization, rectification and uniform organization of the air intake area during the guide process. It is easy to have local weak wind or airflow short circuit, which leads to uneven frost distribution and increased risk of local frost blockage; (3) Some guide or enclosure structures are designed for specific types of outdoor units, with limited adaptability, and lack a unified control strategy that can switch between winter preheating, summer precooling and transitional season bypass direct suction and has an abnormal protection mechanism.

[0004] To address the aforementioned issues, there is an urgent need for a heat exchange system and control method that can be adapted to various air source heat pump outdoor unit internal heat exchanger and fan structures, stabilize and rectify the airflow entering the outdoor unit's air intake area, collect and discharge condensate, switch between different seasonal operating conditions, and possess an abnormal protection mechanism. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a heat exchange system and control method that can be adapted to various air source heat pump outdoor unit internal heat exchanger and fan structures, stabilize and rectify the airflow entering the outdoor unit air intake area, collect and discharge condensate, switch between different seasonal operating conditions, and have an abnormal protection mechanism.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] A vertical soil-source coupled air-source heat pump jet heat exchange system includes heat exchange pipes and an outdoor unit of an air-source heat pump. Multiple heat exchange pipes are arranged in a matrix, with their inlet ends above ground level. All heat exchange pipes are connected to a common manifold at their tops. A pressure-stabilizing air collection chamber is provided at the inlet of the manifold, and a booster fan is installed inside the manifold at the front end of the pressure-stabilizing air collection chamber. A rectifier component is installed inside the pressure-stabilizing air collection chamber, and the outdoor unit of the air-source heat pump is located on the outlet side of the chamber. The outdoor unit is fixedly connected to the pressure-stabilizing air collection chamber via a sealing frame. A nozzle plate is fixedly installed inside the sealing frame, and a bypass air inlet and a damper controlling the opening and closing of the bypass air inlet are provided on the sealing frame. The nozzle plate has a matrix of nozzle holes, each protruding towards the outlet side and contracting from the inlet to the outlet.

[0008] Furthermore, each heat exchange pipe includes a downcomer and an upcomer. The inlet end of the heat exchange pipe is located on one side of the downcomer. A U-shaped bottom connector is provided between the downcomer and the upcomer. The top of each upcomer is connected to the main manifold.

[0009] Furthermore, the plane of the rectifier is perpendicular to the direction of the airflow drawn in by the booster fan. The rectifier can be a honeycomb plate, a perforated plate, or a grid with guide vanes. The side of the rectifier is fixedly installed on the inner wall of the pressure-stabilizing air collection chamber.

[0010] Furthermore, the bottom of the pressure-stabilizing gas collection chamber has a water collection area, and a water seal drain is provided at the bottom of the water collection area.

[0011] Furthermore, the cross-sectional area of ​​the pressure-stabilizing gas collection chamber is larger than the cross-sectional area of ​​the main manifold.

[0012] It also includes a vertical soil-source coupled air-source heat pump jet heat transfer control method, the steps of which are as follows:

[0013] (1) Collect outdoor ambient temperature T out Outdoor relative humidity (RH) out The pressure difference ΔP before and after the air inlet area and the pressure P in the pressure-stabilizing gas collection chamber. c ;

[0014] (2) When the pressure difference ΔP before and after the air inlet area exceeds the preset upper limit of pressure difference ΔPmax or the pressure P in the pressure stabilizing gas collection chamber c Exceeding the preset pressure limit P c When the maximum value is reached, any one of the protection controls can be executed. The protection control is to open the bypass air inlet, adjust the speed of the booster fan, and reduce the load on the outdoor unit of the air source heat pump.

[0015] (3) When the outdoor ambient temperature T out Not lower than the third temperature threshold and outdoor relative humidity RH out When the humidity level is not lower than the third humidity threshold, close the bypass air inlet, turn on the booster fan, and perform the summer vertical soil pre-cooling operation.

[0016] (4) When the outdoor ambient temperature T out When the outdoor ambient temperature is not higher than the second temperature threshold, or when the outdoor ambient temperature T out Temperatures above the second temperature threshold but not above the first temperature threshold and outdoor relative humidity (RH) out When the humidity level is not lower than the second humidity threshold, close the bypass air inlet, turn on the booster fan, and execute the winter vertical soil preheating condition.

[0017] (5) When neither step (3) nor step (4) is satisfied, or when the outdoor ambient temperature T out Temperature above the first temperature threshold and outdoor relative humidity RH out When the humidity is below the first humidity threshold, the bypass direct suction mode is executed, the booster fan is turned off, the bypass air inlet is opened, and the outdoor air enters the sealed frame through the bypass air inlet and is drawn by the outdoor unit of the air source heat pump through the air intake area (15).

[0018] Furthermore, the first temperature threshold is 5 ℃ to 10 ℃; the second temperature threshold is 0 ℃; the third temperature threshold is 25 ℃ to 30 ℃; the first humidity threshold is 50% to 60%; the third humidity threshold is 60% to 70%; and the second humidity threshold is 70% to 80%.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This invention comprises a vertical soil-air heat exchange module, a pressure-stabilizing and rectifying interface module, and a nozzle-jet air delivery coupling module. The downcomer and upcomer pipes in the vertical soil-air heat exchange module can form a pipe group and be uniformly connected to a single main manifold. This not only facilitates modular arrangement according to site conditions and area but also allows for large-scale utilization of the temperature field of deep soil, improving the stability of the pre-treated air temperature. The air supplied to the pressure-stabilizing and rectifying interface module is pre-stabilized by the rectifying components within the pressure-stabilizing air collection chamber, ensuring consistent airflow direction and velocity before entering the nozzle plate, which is beneficial for improving the consistency of the jet array. Finally, the nozzle-jet air delivery coupling module forms multiple jets from the multiple airflows entering the sealed frame and delivers them to the air inlet area through nozzle holes. The jets generate impact and mixing effects when blowing towards the evaporator, which helps enhance heat exchange in the near-wall area and improve the uniformity of the windward airflow, thereby reducing the risk of uneven frost formation and localized frost blockage caused by weak local winds, reducing the frequency of defrosting, and improving operational stability under low-temperature and high-humidity conditions. Moreover, regardless of whether the outdoor unit's fan is located at the top or the side, it can draw in the air after heat exchange.

[0021] 2. This invention not only enables preheating in winter but also precooling in summer. A water collection area is set at the bottom of the pressure-stabilizing air collection chamber, and condensate is discharged through a water-sealed drain, which reduces the risk of water accumulation and water carryover. At the same time, the water-sealed drain can suppress backflow of outside air, improving operational reliability. Moreover, the bypass air inlet on the sealed frame can perform bypass direct suction under suitable environmental conditions to reduce unnecessary soil-side heat exchange and fan power consumption. It can also perform protective control when there is abnormal pressure difference or pressure, ensuring minimum air intake of the outdoor unit and improving system safety and stability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the nozzle plate in this invention;

[0024] Figure 3 This is a schematic diagram of the vertical soil-air heat exchange module in this invention;

[0025] Figure 4 This is a schematic diagram of the voltage regulator and rectifier interface module in this invention;

[0026] Figure 5 This is a schematic diagram of the nozzle jet air delivery coupling module in this invention.

[0027] Figure label:

[0028] 1-Outdoor unit of air source heat pump, 2-Booster fan, 3-Bypass air inlet, 4-Damper, 5-Nozzle plate, 6-Pressure stabilizing air collection chamber, 7-Rectifying component, 8-Water collection area, 9-Water seal drain, 10-Downcomer, 11-Rising pipe, 12-Bottom connector, 13-Main manifold, 14-Sealing frame, 15-Air inlet area. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 5 As shown, a vertical soil-source coupled air-source heat pump jet heat exchange system includes heat exchange pipes and an outdoor unit 1 of an air-source heat pump. Multiple heat exchange pipes are arranged in a matrix, with their inlet ends above ground level. All heat exchange pipes are connected to a common manifold 13 at their tops. A pressure-stabilizing air collection chamber 6 is provided at the inlet of the manifold 13, and a booster fan 2 is installed inside the manifold 13 at the front end of the pressure-stabilizing air collection chamber 6. A rectifier component 7 is installed inside the pressure-stabilizing air collection chamber 6, and the outdoor unit 1 of the air-source heat pump is located on the outlet side of the pressure-stabilizing air collection chamber 6. The outdoor unit 1 of the air-source heat pump is fixedly connected to the pressure-stabilizing air collection chamber 6 via a sealing frame 14. A nozzle plate 5 is fixedly installed inside the sealing frame 14, and a bypass inlet 3 located in front of the nozzle plate 5 and a damper 4 controlling the opening and closing of the bypass inlet 3 are provided on the sealing frame 14. The nozzle plate 5 has nozzle holes arranged in a matrix, each nozzle hole protruding towards the outlet side and contracting from the inlet to the outlet.

[0031] Each heat exchange pipe includes a downcomer 10 and an upcomer 11. The inlet end of the heat exchange pipe is located on one side of the downcomer 10. A U-shaped bottom connector 12 is provided between the downcomer 10 and the upcomer 11. The top of each upcomer 11 is connected to a main manifold 13. The downcomer 10 and upcomer 11 can form a pipe group and then be connected to a single main manifold 13 to form a vertical soil-air heat exchange module. This allows the booster fan 2 in the main manifold 13 to drive each heat exchange pipe to draw air inward. Moreover, the U-shaped bottom connector 12 facilitates connection between the vertical downcomer 10 and upcomer 11, which not only facilitates modular arrangement according to site conditions and area, but also allows for large-scale utilization of the temperature field of deep soil, improving the stability of the pretreated air temperature.

[0032] The plane of the rectifier component 7 is perpendicular to the airflow direction drawn in by the booster fan 2. The rectifier component 7 can be a honeycomb plate, a perforated plate, or a grid with guide vanes. The side of the rectifier component 7 is fixedly mounted on the inner wall of the pressure-stabilizing and rectifying chamber 6. The air fed into the pressure-stabilizing and rectifying interface module can be pre-stabilized by the rectifier component 7 in the pressure-stabilizing and rectifying chamber 6, so that the airflow direction and velocity are consistent before entering the nozzle plate 5, which is beneficial to improving the consistency of the jet array.

[0033] The pressure-stabilizing air collecting chamber 6 has a water collecting area 8 at its bottom, and a water-sealed drain 9 is installed at the bottom of the water collecting area 8. The condensate collected in the water collecting area 8 is discharged through the water-sealed drain 9, which can reduce the risk of water accumulation and water carryover. At the same time, the water-sealed drain 9 can suppress the backflow of outside air and improve operational reliability. The cross-sectional area of ​​the pressure-stabilizing air collecting chamber 6 is larger than that of the main manifold 13, which can prevent the air entering the pressure-stabilizing air collecting chamber 6 from concentrating in the middle of the rectifier component 7 and flowing out. It allows the air to diffuse in the pressure-stabilizing air collecting chamber 6 first, and then flow out from the holes of the rectifier component 7, which can improve the pressure stabilization and rectification effect.

[0034] The steps of the heat exchange control method of the present invention are as follows:

[0035] (1) Collect outdoor ambient temperature T out Outdoor relative humidity (RH) out The pressure difference ΔP before and after the air inlet area and the pressure P in the pressure-stabilizing gas collection chamber. c The preset temperature threshold is 5℃~10℃; the second temperature threshold is 0℃; the third temperature threshold is 25℃~30℃; the first humidity threshold is 50%~60%; the third humidity threshold is 60%~70%; and the second humidity threshold is 70%~80%.

[0036] The setting of each temperature and humidity threshold has a clear physical basis and energy-saving purpose, and by reasonably dividing the operating range, it takes into account both the control of frost risk and the reduction of system operating load.

[0037] The first temperature threshold and the first humidity threshold are used to determine the applicable range of the bypass direct suction operation. When the outdoor ambient temperature T out Temperature above the first temperature threshold and outdoor relative humidity RH out When the humidity is below the first humidity threshold, due to the outdoor relative humidity RH out Although the surface temperature of the evaporator of the outdoor unit 1 of the air source heat pump is lower than the ambient temperature, the tendency to frost is weak. If the vertical soil-air heat exchange module and the booster fan 2 are still used in this range, it will introduce additional airflow resistance and fan power consumption, increasing the system operating load while the energy-saving benefits are limited. Therefore, the bypass direct suction mode is preferred at this time. The booster fan 2 is turned off, and the outdoor unit 1 of the air source heat pump is turned on directly, so that the outdoor air enters the air intake area 15 through the bypass air inlet 3, passes through the nozzle plate 5 to form a jet and exchange heat with the evaporator, thereby reducing the fan load and the soil-side heat exchange load and improving the operating economy.

[0038] The second temperature threshold and the second humidity threshold are used to determine the triggering conditions for winter preheating. When the outdoor ambient temperature T out Not higher than the second temperature threshold, or when the outdoor ambient temperature T out Temperatures above the second temperature threshold but not above the first temperature threshold and outdoor relative humidity (RH)out When the outdoor air dew point temperature is not lower than the second humidity threshold, it is close to or higher than the evaporator surface temperature, due to the outdoor relative humidity (RH). out The temperature is relatively high. Direct air intake would cause rapid frost formation on the evaporator fins, a sharp increase in wind-side resistance, and frequent defrosting, significantly increasing the power load on the outdoor unit 1 and the booster fan 2 of the air source heat pump. In this case, the winter preheating mode is activated, allowing the outdoor air to exchange heat with the deeper soil, raising the inlet air temperature to the intake area 15. Simultaneously, the preheated air forms some condensate in the heat exchange pipes and the pressure-stabilizing air collection chamber 6. This preheated and dehumidified air not only increases the evaporator surface temperature, reducing the difference between the surface temperature and the air dew point temperature, but also slows down frost growth, reduces defrosting frequency and the risk of frost blockage, effectively reducing the compressor and fan loads and improving system energy efficiency under low temperature and high humidity conditions in winter.

[0039] The third temperature threshold and the third humidity threshold are used to determine the triggering conditions for summer pre-cooling operation. When the outdoor temperature is not lower than the third temperature threshold and the relative humidity is not lower than the third humidity threshold, the enthalpy of the air entering the outdoor unit 1 of the air source heat pump is higher. Under pre-cooling conditions, the condensing temperature and condensing pressure increase, and the load and condensing heat exchange load of the outdoor unit 1 of the air source heat pump increase significantly. This invention, by activating the summer pre-cooling mode, allows the high-temperature and high-humidity air to exchange heat with the lower-temperature soil first, reducing the enthalpy of the inlet air and the sensible and latent heat loads, thereby reducing the heat load of the outdoor unit 1 of the air source heat pump and improving cooling efficiency. At the same time, a certain amount of heat is reinjected into the soil during summer operation, which helps to compensate for the "cold accumulation" of the soil caused by winter heat extraction on an annual scale, improves the soil temperature field, and reduces the long-term operating load on the soil side.

[0040] By setting the temperature and humidity thresholds in combination, this invention can achieve a dynamic balance between reducing the risk of frost and frost blockage, reducing the operating load of compressors and fans, controlling the soil-side heat exchange load, and improving the overall energy efficiency throughout the year under different climate and operating conditions.

[0041] (2) When the pressure difference ΔP before and after the air inlet zone 15 exceeds the preset pressure difference upper limit ΔPmax or the pressure P in the pressure stabilizing gas collection chamber 6 c Exceeding the preset pressure limit P cWhen the maximum value is reached, any one of the following protection controls is executed: opening the bypass air inlet 3, adjusting the speed of the booster fan 2, and reducing the load on the outdoor unit 1 of the air source heat pump. Specifically, the bypass air inlet 3 is opened appropriately to introduce some outdoor air, reducing the overall system resistance; the speed of the booster fan 2 is adjusted to maintain the total airflow and pressure within a safe range; and if necessary, the operating frequency or load of the outdoor unit 1 of the air source heat pump is reduced to prevent overload or severe frost buildup on the evaporator. Through the above controls, the system of this invention can maintain a reasonable airflow and air volume under different climatic and load conditions, ensuring the safe and stable operation of the outdoor unit of the air source heat pump.

[0042] (3) When the outdoor ambient temperature T out Not lower than the third temperature threshold and outdoor relative humidity RH out When the humidity level is not lower than the third humidity threshold, the summer vertical soil pre-cooling condition is executed. The damper 4 is closed to seal the bypass air inlet 3, and the booster fan 2 is turned on. Outdoor air enters through the air inlets of each downcomer 10, where heat exchange occurs within the downcomer 10 and the riser 11. The pre-cooled air enters the pressure-stabilizing and collecting chamber 6 for deceleration and pressure stabilization. After being rectified by the rectifier component 7, it enters the nozzle jet air delivery coupling module with a relatively uniform and directional airflow. Multiple jets are formed from the nozzle holes of the nozzle plate 5 and delivered into the air intake area 15. Under the suction action of the fan of the outdoor unit 1 of the air source heat pump, the air exchanges heat with the condenser and is then discharged from the outdoor unit, thus completing the pre-cooling of the air.

[0043] During this period, hot and humid outdoor air enters the soil through the downcomer 10, exchanges heat with the cooler soil, and is cooled. When the air temperature drops below the dew point, condensation occurs on the inner wall of the downcomer 10 and near the bottom connector 12. The condensation flows downwards into the bottom area by gravity and is discharged or diverted to a safe location through pre-set drainage measures. If condensation still occurs in the pressure-stabilizing air collection chamber 6, it can be collected in the water collection area 8 and discharged through the water seal drain 9.

[0044] like Figure 2 As shown, in this embodiment, the nozzle holes on the nozzle plate 5 are arranged in a matrix. A predetermined spray distance is set between the nozzle plate 5 and the air inlet area 15, so that the pre-treated air is ejected after the cross-section of each nozzle hole is contracted and accelerated. Within the spray distance range, multiple jets with impact and mixing zones are formed, which act on the windward fins of the condenser air inlet area 15. The jet impact and mixing increase the turbulence in the near-wall area, weaken the velocity boundary layer near the fin surface, thereby improving the local convective heat transfer coefficient and improving the uniformity of wind speed distribution in the air inlet area 15, reducing local low wind speed and cold spot areas, and reducing uneven frost distribution and the risk of frost blockage. The inner flow channel of the nozzle hole is preferably designed as a short pipe structure that gradually narrows from the inlet side to the outlet side to reduce the flow separation loss in the inlet area and increase the average flow velocity at the nozzle outlet.

[0045] (4) When the outdoor ambient temperature T out When the outdoor ambient temperature is not higher than the second temperature threshold, or when the outdoor ambient temperature T out Temperatures above the second temperature threshold but not above the first temperature threshold and outdoor relative humidity (RH) out When the humidity level is not lower than the second humidity threshold, the winter vertical soil preheating condition is executed. The damper 4 is closed to seal the bypass air inlet 3, and the booster fan 2 is turned on. Outdoor air enters through the air inlets of each downcomer 10, where heat exchange occurs within the downcomer 10 and the riser 11. The preheated air enters the pressure-stabilizing and collecting chamber 6, where it is decelerated and stabilized. After being rectified by the rectifier component 7, it enters the nozzle jet air delivery coupling module with a relatively uniform and directional airflow. Multiple jets are formed by the nozzle holes of the nozzle plate 5 and delivered into the air intake area 15. The air is then drawn in by the fan of the outdoor unit 1 of the air source heat pump and discharged through the evaporator, completing the preheating of the air.

[0046] (5) When neither step (3) nor step (4) is satisfied, or when the outdoor ambient temperature T out Temperature above the first temperature threshold and outdoor relative humidity RH out When the humidity level is below the first humidity threshold, bypass direct intake mode is activated. The booster fan 2 is shut off, and the damper 4 is opened to open the bypass inlet 3, allowing outdoor air to enter the sealed frame 14 through the bypass inlet 3 and be drawn by the air source heat pump outdoor unit 1 through the intake area 15. This reduces unnecessary soil-side heat exchange and fan power consumption. Protective control can be implemented in case of abnormal pressure differential or pressure, ensuring minimum air intake for the outdoor unit and improving system safety and stability.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical soil-source coupled air-source heat pump jet heat exchange system, comprising heat exchange pipes and an air-source heat pump outdoor unit (1), characterized in that: The heat exchange pipes are arranged in a matrix, with the inlet ends of the heat exchange pipes located above ground level. The tops of all the heat exchange pipes are connected to a common manifold (13). A pressure-stabilizing air collection chamber (6) is provided at the inlet of the manifold (13), and a booster fan (2) is provided in the manifold (13) at the front end of the pressure-stabilizing air collection chamber (6). A rectifier component (7) is provided in the pressure-stabilizing air collection chamber (6), and the outdoor unit (1) of the air source heat pump is located on the air outlet side of the pressure-stabilizing air collection chamber (6). The outdoor unit (1) of the air source heat pump is fixedly connected to the pressure-stabilizing air collection chamber (6) through the sealing frame (14). A nozzle plate (5) is fixedly installed inside the sealing frame (14). A bypass air inlet (3) located in front of the nozzle plate (5) and a damper (4) for controlling the opening and closing of the bypass air inlet (3) are provided on the sealing frame (14). The nozzle plate (5) is provided with nozzle holes distributed in a matrix. Each nozzle hole protrudes towards the air outlet side and contracts from the air inlet to the air outlet.

2. The vertical soil-source coupled air-source heat pump jet heat exchange system according to claim 1, characterized in that: Each heat exchange pipe includes a downcomer (10) and an upcomer (11). The inlet end of the heat exchange pipe is located on one side of the downcomer (10). A U-shaped bottom connector (12) is provided between the downcomer (10) and the upcomer (11). The top of each upcomer (11) is connected to the main manifold (13).

3. The vertical soil-source coupled air-source heat pump jet heat exchange system according to claim 1, characterized in that: The plane of the rectifier (7) is perpendicular to the direction of the airflow drawn in by the booster fan (2). The rectifier (7) can be a honeycomb plate, a perforated plate or a grid with guide vanes. The side of the rectifier (7) is fixedly installed on the inner wall of the pressure stabilizing and collecting chamber (6).

4. The vertical soil-source coupled air-source heat pump jet heat exchange system according to claim 1, characterized in that: The bottom of the pressure-stabilizing gas collection chamber (6) has a water collection area (8), and a water seal drainer (9) is provided at the bottom of the water collection area (8).

5. A vertical soil-source coupled air-source heat pump jet heat exchange system according to claim 4, characterized in that: The cross-sectional area of ​​the pressure-stabilizing gas collection chamber (6) is larger than the cross-sectional area of ​​the main manifold (13).

6. A method for controlling vertical soil-source coupled air-source heat pump jet heat exchange, based on the vertical soil-source coupled air-source heat pump jet heat exchange system according to any one of claims 1-5, characterized in that: The steps are as follows: (1) Collect outdoor ambient temperature T out Outdoor relative humidity (RH) out The pressure difference ΔP before and after the air inlet area and the pressure P in the pressure-stabilizing gas collection chamber. c ; (2) When the pressure difference ΔP before and after the air inlet area exceeds the preset pressure difference upper limit ΔPmax or the pressure P inside the pressure stabilizing air collection chamber (6) c Exceeding the preset pressure limit P c When max, any one of the protection controls is executed. The protection control is to open the bypass air inlet, adjust the speed of the booster fan (2), and reduce the load of the outdoor unit (1) of the air source heat pump. (3) When the outdoor ambient temperature T out Not lower than the third temperature threshold and outdoor relative humidity RH out When the humidity is not lower than the third humidity threshold, close the bypass air inlet (3), turn on the booster fan (2), and perform the summer vertical soil pre-cooling operation. (4) When the outdoor ambient temperature T out When the outdoor ambient temperature is not higher than the second temperature threshold, or when the outdoor ambient temperature T out Temperatures above the second temperature threshold but not above the first temperature threshold and outdoor relative humidity (RH) out When the humidity is not lower than the second humidity threshold, close the bypass air inlet (3), turn on the booster fan (2), and perform the winter vertical soil preheating condition; (5) When neither step (3) nor step (4) is satisfied, or when the outdoor ambient temperature T out Temperature above the first temperature threshold and outdoor relative humidity RH out When the humidity is below the first humidity threshold, the bypass direct suction mode is executed, the booster fan (2) is turned off, the bypass air inlet (3) is opened, and the outdoor air enters the sealed frame (14) through the bypass air inlet (3) and is drawn through the air intake area (15) by the outdoor unit (1) of the air source heat pump.

7. A vertical soil-source coupled air-source heat pump jet heat exchange system according to claim 6, characterized in that: The first temperature threshold is 5℃~10℃; the second temperature threshold is 0℃; the third temperature threshold is 25℃~30℃; the first humidity threshold is 50%~60%; the third humidity threshold is 60%~70%; and the second humidity threshold is 70%~80%.

Images