Air heat pump suitable for low temperature environment

Abstract

This invention relates to the field of air heat pump technology, specifically to an air heat pump suitable for low-temperature environments. It includes a protective casing with two front-to-back vents at the top, each equipped with a ventilation mechanism. A working chamber is located inside the casing, containing two symmetrically arranged evaporator plates. Cooling pipes abut against each evaporator plate. Two symmetrically arranged guide plates are fixed within the working chamber, located at the outer ends of the cooling pipes. Switches are rotatably connected to the front and rear side walls of the working chamber, with a curved plate fixed at the center of the switch. A rotatable electric gear is located inside the protective casing, meshing with the curved plate. A connecting box is fixed at the lower end of the protective casing, connecting the casing and the connecting box via a connecting cavity. Defrosting and heat absorption are performed intermittently and alternately by the evaporator plates, preventing a drop in indoor temperature during defrosting when the device cannot provide heating.

Description

Technical Field

[0001] This invention relates to the field of air heat pump technology, specifically to an air heat pump suitable for low-temperature environments. Background Technology

[0002] An air source heat pump is a device that uses heat from the air for heating and cooling. Its principle is to transfer heat to the evaporator plate through the circulation of refrigerant, thereby cooling the evaporator plate and making the outside air temperature higher than the temperature of the evaporator plate for heat exchange. This can effectively utilize low-grade heat energy that is difficult to apply, thus achieving energy saving.

[0003] However, when the external environment is in a low-temperature environment, if the external temperature is lower than the temperature of the evaporator plate, heat flows from the high-temperature area to the low-temperature area of ​​the external environment, preventing the heat from the external air from flowing to the evaporator plate. This greatly affects the efficiency of heat conduction, making the heat pump unable to work properly. Therefore, it is necessary to design an air heat pump suitable for low-temperature environments to address the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide an air heat pump suitable for low-temperature environments, thereby overcoming the aforementioned defects in the prior art.

[0005] According to the present invention, an air heat pump suitable for low-temperature environments includes a protective housing. Two vents are distributed front and rear at the upper end of the protective housing, and a ventilation mechanism is provided on each of the two vents. A working chamber is formed inside the protective housing. The ventilation mechanism includes a power motor fixed to the upper side wall of the working chamber, with transmission boxes at both ends of the power motor. Ventilators are connected to each of the two vents, and a power rod connected to the transmission box is provided at the lower end of each of the two vents. Fixing plates are fixed to the front and rear side walls of the working chamber, rotatably engaging with the power rods at the vents. Two symmetrically arranged evaporating plates are provided inside the working chamber, and each of the two evaporating plates abuts against... The cooling pipe is clamped at both ends of the evaporator plate. Two symmetrical guide plates are fixed inside the working chamber. The guide plates are located at the outer ends of the cooling pipe. Switches are abutted and rotatably connected to the front and rear side walls of the working chamber. An arc plate is fixed at the middle of the switch. A rotatable electric gear is provided inside the protective shell. The electric gear meshes with the arc plate. The outer circumferential surface of the switch can abut the lower ends of the two guide plates respectively. The far ends of the two guide plates abut the left and right side walls of the working chamber. A connecting box is fixed at the lower end of the protective shell. A connecting cavity is provided between the protective shell and the connecting box.

[0006] Preferably, two symmetrical air inlet pipes are connected to the rear side wall of the working chamber, and two symmetrical exhaust pipes are fixedly connected to the rear end face of the connecting box. An electric control valve is connected to the air inlet pipe. The air inlet pipe is located at the lower end of the guide plate. Two symmetrical connecting boxes are fixedly connected to the lower side wall of the working chamber. The upper end of the connecting box is connected to the two openings of the cooling pipe. The lower end of the connecting box is connected to two connecting pipes. A sliding box that can slide is fixed inside the connecting box. The sliding box can abut and seal against the opening of the cooling pipe. An adjusting block is connected between the connecting box and the sliding box. Heat-absorbing fins are provided at both the front and rear ends of the connecting box. The two heat-absorbing fins are connected to the front and rear ends of the adjusting block. The connecting pipe is connected to the condenser. A drain outlet is provided at the lower end of the connecting box.

[0007] Preferably, a temperature sensor is provided on the guide plate, and a temperature measuring plate is connected to the temperature sensor. The temperature measuring plate abuts against the end face of the evaporator plate and the guide plate. A control panel is installed on the protective shell and is electrically connected to the power source of the temperature sensor and the electric gear.

[0008] The beneficial effects of this invention are:

[0009] Cooling pipes are sandwiched between the left and right ends of the evaporator plate. Coolant is injected into the cooling pipes through the connecting box, which can reduce the temperature at the cooling pipes, thereby improving the absorption efficiency at the cooling pipes and reducing the requirements for use under low temperature conditions, and increasing the upper and lower limits of the evaporator plate's heat absorption.

[0010] Under temperature changes, the flow rate at the cooling pipe is automatically adjusted by changing the size of the opening between the cooling pipe and the connecting pipe through the sliding box. This improves absorption efficiency in high-temperature environments and allows for normal operation in low-temperature environments.

[0011] The two evaporating plates alternately perform defrosting and heat absorption, enabling defrosting of the evaporating plates without stopping the heating supply, thus avoiding a drop in indoor temperature caused by the inability to use the device for heating during the defrosting process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the appearance of the present invention;

[0013] Figure 2 This is a schematic diagram of the appearance of the present invention;

[0014] Figure 3 This is the present invention. Figure 1 A top-view structural diagram;

[0015] Figure 4 This is the present invention. Figure 1 A front view structural diagram;

[0016] Figure 5 This is the present invention. Figure 3 A cross-sectional schematic diagram of AA in the middle;

[0017] Figure 6 This is the present invention. Figure 4 A partial cross-sectional view of the middle BB;

[0018] Figure 7 This is a schematic diagram of the external appearance of the ventilation mechanism of the present invention;

[0019] Figure 8 This is a schematic diagram of the evaporator plate portion of the present invention;

[0020] Figure 9 This is the present invention. Figure 1 A schematic diagram showing the exterior after removing the protective casing and ventilation mechanism;

[0021] Figure 10 This is a schematic diagram of the compressor portion of the present invention;

[0022] In the picture:

[0023] 10. Protective casing; 11. Ventilation opening; 12. Ventilator; 13. Fixing plate; 14. Transmission box; 15. Power motor; 16. Ventilation mechanism; 17. Inlet pipe; 18. Electrically controlled valve; 19. Connecting box; 20. Heat-absorbing fin; 21. Connecting box; 22. Working chamber; 23. Connecting chamber; 24. Guide plate; 25. Cooling pipe; 26. Evaporator plate; 27. Thermometer; 28. Thermometer plate; 29. ​​Sliding box; 30. Adjusting block; 31. Connecting pipe; 32. Switch; 33. Scale plate; 34. Electric gear; 35. Exhaust pipe. Detailed Implementation

[0024] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on Figure 1 The orientations or positional relationships shown are for the purpose of describing the present invention only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0025] Example 1:

[0026] Reference Figures 1-10According to an embodiment of the present invention, an air heat pump suitable for low-temperature environments includes a protective housing 10. Two vents 11, distributed front and rear, are opened at the upper end of the protective housing 10. A ventilation mechanism 16 is provided on each of the two vents 11. A working chamber 22 is provided inside the protective housing 10. The ventilation mechanism 16 includes a power motor 15 fixed to the upper side wall of the working chamber 22. Transmission boxes 14 are provided at both the front and rear ends of the power motor 15. Ventilators 12 are connected to each of the two vents 11. A power rod is provided at the lower end of each of the two vents 12 and connected to the transmission box 14. The front and rear side walls of the working chamber 22... The upper part is fixed with a fixed plate 13, which rotates and engages with the power rod at the ventilator 12. The working chamber 22 contains two symmetrically arranged evaporating plates 26, each abutting against a cooling pipe 25. The cooling pipes 25 are positioned around the left and right ends of the evaporating plates 26. The working chamber 22 also contains two symmetrically arranged guide plates 24, located at the outer ends of the cooling pipes 25. Switches 32 are abutting against and rotatably connected to the front and rear side walls of the working chamber 22. An arc plate 33 is fixed at the middle of the switcher 32. The protective housing 10 contains a rotatable electric gear 34. Engaging with the arc plate 33, the outer peripheral surface of the switch 32 can abut against the lower ends of the left and right guide plates 24 respectively. The far ends of the two guide plates 24 abut against the left and right side walls of the working chamber 22. A connecting box 21 is fixedly provided at the lower end of the protective shell 10. A connecting cavity 23 is provided between the protective shell 10 and the connecting box 21. Two symmetrical air inlet pipes 17 are connected to the rear side wall of the working chamber 22. Two symmetrical exhaust pipes 35 are fixedly provided on the rear end face of the connecting box 21. An electric control valve 18 is connected to the air inlet pipe 17. The air inlet pipe 17 is located at the lower end of the guide plate 24. Two symmetrical connecting boxes 19 are fixed on the lower side wall of the working chamber 22. The upper end of the connecting box 19 is connected to the two openings of the cooling pipe 25. The lower end of the connecting box 19 is connected to two connecting pipes 31. A sliding box 29 is fixed inside the connecting box 19. The sliding box 29 can abut and seal with the opening of the cooling pipe 25. An adjusting block 30 is connected between the connecting box 19 and the sliding box 29. Heat-absorbing plates 20 are provided at both the front and rear ends of the connecting box 19. The two heat-absorbing plates 20 are connected to the front and rear ends of the adjusting block 30. The connecting pipe 31 is connected to the condenser. A drain outlet is provided at the lower end of the connecting box 21.

[0027] The ventilation mechanism 16 is powered on, operating via a power motor 15. Power is transmitted from the two power ends of the power motor 15 to the two transmission boxes 14, causing the power rods on the two ventilators 12 connected to the transmission boxes 14 to rotate. These power rods drive the fan blades to rotate, drawing air from the vents 11 into the working chamber 22. The two guide plates 24, with their far ends abutting against the side walls of the working chamber 22, seal the chamber, preventing air from escaping downwards from the left and right sides. With the switch 32 in place... Air flows downward through the gap between the switch 32 and the guide plate 24, and enters the space between the guide plate 24 and the evaporator plate 26. Heat exchange occurs at the evaporator plate 26. The exchanged air enters the connecting box 21 through the connecting cavity 23 and is discharged outward through the exhaust pipe 35 at the connecting box 21. The condensate generated at the evaporator plate 26 flows downward into the connecting box 21 under the guidance of the evaporator plate 26. A drain outlet is provided at the lower end of the connecting box 21, and a pipe is connected to the drain outlet to discharge the condensate and water after the frost melts in the connecting box 21.

[0028] The connecting pipe 31 connects to the condenser, and condensate is pumped into the connecting box 19 through the connecting pipe 31. The connecting box 19 is in contact with the adjusting block 30, but the adjusting block 30 is not in contact with the condensate in the connecting box 19. Heat is conducted through the heat-absorbing fins 20. When both the inner and outer ends of the protective shell 10 are in a high-temperature environment, the adjusting block 30 contracts, causing the connected sliding box 29 to slide, opening the opening between the sliding box 29 and the cooling pipe 25. The connecting pipe 31 then connects to the cooling pipe 25 through the connecting box 19, and coolant is pumped into the cooling pipe 25. Conversely, when both the inner and outer ends of the protective shell 10 are in a low-temperature environment, the adjusting block 30 expands, causing the sliding box 29 to slide, closing the opening between the cooling pipe 25 and the connecting box 25. The connecting opening at the junction box 19 is closed until it is closed, thereby controlling the flow rate into the cooling pipe 25 and adjusting the temperature at the automatically regulating evaporator plate 26. When the temperatures at the inner and outer ends of the protective shell 10 are inconsistent, for example, when the temperature at the heat-absorbing fin 20 at the inner end (also the front end) is high (at this time, the guide plate 24 and the evaporator plate 26 are heating up and defrosting), and the temperature at the heat-absorbing fin 20 at the outer end is low, the temperature difference between the inner and outer ends is large, which causes one end of the regulating block 30 to expand and the other end to contract. At this time, the sliding box 29 connected to the regulating block 30 is subjected to tilting tension. With the sliding box 29 abutting against the inner end face of the connecting box 19, the sliding box 29 does not slide. At this time, the sliding box 29 is in the state of closing the cooling pipe 25.

[0029] Example 2:

[0030] Referring to Embodiment 1, according to an embodiment of the present invention, an air heat pump suitable for low-temperature environments may optionally include a thermometer 27 on the guide plate 24, a thermometer plate 28 connected to the thermometer 27, the thermometer plate 28 abutting against the end face of the evaporator plate 26 and the guide plate 24, and a control panel installed at the protective housing 10 and electrically connected to the power source at the thermometer 27 and the electric gear 34.

[0031] When the temperature sensor 27 installed on the guide plate 24 is powered on under normal working conditions, the temperature is detected by the temperature sensor 27 at the contact point between the temperature sensor 28 and the guide plate 24 through the temperature sensor plate 28 connected to the temperature sensor 27. The detected temperature is compared with the set temperature. When the set temperature value is greater than the detected temperature value, the electric gear 34 is automatically controlled to rotate through the control terminal on the control panel. Through the meshing between the electric gear 34 and the arc plate 33, the switch 32 is rotated, thereby connecting the guide plate 24 at the other end with the working chamber 22.

[0032] For example, if the temperature at the left-side evaporator plate 26 is low and frost forms at this point, the temperature value detected by the left-side thermometer 27 is processed. After a period of time, the electric gear 34 is rotated via the control panel, causing the frost to form. Figure 5 As shown, the state in which the left guide plate 24 is connected to the working cavity 22 is changed to the state in which the right guide plate 24 is connected to the working cavity 22.

[0033] The air from the outside enters the working chamber 22 through the operation of the ventilation mechanism 16. Located in the middle of the working chamber 22, it is separated by two guide plates 24. Under the operation of the ventilation mechanism 16, the air flows downward and flows through the gap between the switch 32 and the guide plate 24, and comes into contact with the evaporator plate 26, so that the heat of the air is transferred to the evaporator plate 26 for absorption. Under the guidance of the guide plate 24, the air comes into contact with the left and right end faces of the evaporator plate 26, and enters the connecting box 21 through the opening of the connecting chamber 23. It is then discharged outward through the exhaust pipe 35 at the connecting box 21.

[0034] After heat exchange at the evaporator plate 26, the outside air is discharged through the exhaust pipe 35. A compressor is connected to the lower end of the evaporator plate 26. The compressor is used to compress the low-pressure steam generated at the evaporator plate 26 into high-temperature, high-pressure steam for subsequent heat recovery, as shown in the protective casing 10. The intake pipe 17 extends downward and wraps around the outer end of the compressor to absorb the heat generated by the compressor during operation. Pipes are connected at both ends of the compressor. The control panel opens the electric control valve 18 at one end, for example... Figure 5As shown, the guide plate 24 on the left end is in contact with the air to absorb heat, while the guide plate 24 on the right end is closed. At this time, the electric control valve 18 on the right end is opened and the electric control valve 18 on the left end is closed, so that the hot air absorbed by the air intake pipe 17 flows back through the air intake pipe 17 on the right end and enters the guide plate 24 on the right end. The air is heated and defrosted at the guide plate 24 and discharged to the outside through the exhaust pipe 35.

[0035] In a low-temperature environment, the switch operates in an alternating left-right mode. In a high-temperature environment, when the temperature values ​​detected by the thermometers 27 at both ends are higher than the set value, the electric gear 34 controls the ruler plate 33 to rotate, causing the switch 32 to rotate to the middle position. At this time, the circumference of the switch 32 does not contact the guide plates 24 at both ends, and the air can contact the two evaporation plates 26 through the two guide plates 24.

[0036] It adapts to changes in internal and external temperature, requiring no manual control, making it convenient and quick.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. An air heat pump suitable for low-temperature environments, comprising a protective housing (10), characterized in that: The upper end of the protective shell (10) has two vents (11) distributed front and back, and the two vents (11) are equipped with ventilation mechanisms (16). The protective shell (10) has a working chamber (22) inside, and the working chamber (22) is equipped with two symmetrical evaporation plates (26). Each of the two evaporation plates (26) is abutted by a cooling pipe (25). The working chamber (22) is fixed with two symmetrical guide plates (24). 24) A switch (32) is located at the outer end of the cooling pipe (25) and is abutted and rotatably connected to the front and rear side walls of the working chamber (22). A ruler-arc plate (33) is fixed at the middle position of the switch (32). A rotatable electric gear (34) is provided inside the protective shell (10). The electric gear (34) meshes with the ruler-arc plate (33). The outer peripheral surface of the switch (32) can abut against the lower ends of the left and right guide plates (24) respectively. The lower end of the protective shell (10) is fixedly provided with a connecting box (21), and a connecting cavity (23) is opened between the protective shell (10) and the connecting box (21). Two left-right symmetrical connecting boxes (19) are fixedly provided on the lower side wall of the working cavity (22). The upper end of the connecting box (19) is connected to the two openings of the cooling pipe (25), and the lower end of the connecting box (19) is connected to two connecting pipes (31). The connecting box (19) is fixedly provided with... A sliding box (29) is capable of sliding, and the sliding box (29) can be closed by abutting against the opening of the cooling pipe (25). An adjusting block (30) is connected between the connecting box (19) and the sliding box (29). Heat-absorbing plates (20) are provided at both the front and rear ends of the connecting box (19). The two heat-absorbing plates (20) are connected to the front and rear ends of the adjusting block (30). The connecting pipe (31) is connected to the condenser. A drain outlet is provided at the lower end of the connecting box (21). When both the inner and outer ends of the protective shell (10) are in a high-temperature environment, the adjusting block (30) contracts and drives the connected sliding box 29 to slide, so that the opening between the sliding box (29) and the cooling pipe (25) is opened, and the connecting pipe (31) is connected to the cooling pipe (25) through the connecting box (19) to flush condensate into the cooling pipe (25); when both the heat-absorbing fins (20) at the inner and outer ends of the protective shell (10) are in a low-temperature environment, the adjusting block (30) expands and drives the sliding box (29) to slide, reducing the opening between the cooling pipe (25) and the connecting box (19) until it is closed; when the temperature difference between the inner and outer ends of the protective shell (10) is large, the sliding box (29) is subjected to tilting tension and does not slide, at which time the sliding box (29) is in the state of closing the cooling pipe (25).

2. An air heat pump suitable for low-temperature environments according to claim 1, characterized in that: The guide plate (24) is provided with a thermometer (27), and a temperature measuring plate (28) is connected to the thermometer (27). The temperature measuring plate (28) abuts against the end face of the evaporator plate (26) and the guide plate (24). A control panel is installed at the protective shell (10) and is electrically connected to the power source at the thermometer (27) and the electric gear (34).

3. An air heat pump suitable for low-temperature environments according to claim 2, characterized in that: The ventilation mechanism (16) includes a power motor (15) fixed on the upper side wall of the working chamber (22). The power motor (15) has a transmission box (14) at both the front and rear ends. Each of the two ventilation ports (11) is connected to a ventilator (12). The lower end of each of the two ventilators (12) is provided with a power rod connected to the transmission box (14). The front and rear side walls of the working chamber (22) are fixed with fixing plates (13) that rotate with the power rod at the ventilator (12).

4. An air heat pump suitable for low-temperature environments according to claim 3, characterized in that: Two symmetrical air inlet pipes (17) are connected to the rear side wall of the working chamber (22). Two symmetrical exhaust pipes (35) are fixedly connected to the rear end face of the connecting box (21). An electric control valve (18) is connected to the air inlet pipe (17). The air inlet pipe (17) is located at the lower end of the guide plate (24).

5. An air heat pump suitable for low-temperature environments according to claim 4, characterized in that: The cooling pipe (25) is sandwiched between the left and right ends of the evaporator plate (26), and the far ends of the two guide plates (24) abut against the left and right side walls of the working chamber (22).

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