Air heat pump suitable for low-temperature environment

Abstract

The invention relates to the technical field of air heat pumps, in particular to an air heat pump suitable for a low-temperature environment, which comprises a protective shell, two ventilation openings distributed front and back are formed in the upper end of the protective shell, ventilation mechanisms are arranged on the two ventilation openings, a working cavity is formed in the protective shell, and two evaporation plates in bilateral symmetry are arranged in the working cavity. The two evaporation plates abut against cooling pipes, two guide plates which are symmetrical left and right are fixedly arranged in the working cavity and located at the outer ends of the cooling pipes, the front side wall and the rear side wall of the working cavity abut against and are rotationally connected with a switcher, a ruler arc plate is fixedly arranged at the middle end of the switcher, and a rotatable electric gear is arranged in the protective shell. The electric gear is meshed with the ruler arc plate, a communicating box is fixedly arranged at the lower end of the protective shell, a communicating cavity is formed between the protective shell and the communicating box in a communicating mode, defrosting and heat absorption work is conducted intermittently and alternately through the evaporation plate, and the situation that in the defrosting process, the device cannot be used for heat supply, and consequently the indoor temperature is lowered is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of air heat pumps, and in particular to an air heat pump suitable for use in low-temperature environments. Background Art

[0002] An air source heat pump is a device that uses heat in the air for heating and cooling. Its principle is to transfer heat to the evaporator plate through the circulation of refrigerant, cool the evaporator plate, and make the outside air temperature higher than the temperature of the evaporator plate for heat exchange. It can effectively utilize low-grade thermal energy that is difficult to use to achieve energy saving.

[0003] However, when the external environment is in a low temperature environment, if the external environment temperature is lower than the temperature of the evaporation plate, heat flows from the high temperature to the low temperature of the external environment, making it impossible for the external air heat to flow to the evaporation plate, resulting in a great impact on the efficiency of heat conduction, making it impossible for the heat pump to be used normally. Therefore, it is necessary to design an air heat pump suitable for low temperature environments in view of the shortcomings of the existing technology. Summary of the invention

[0004] The object of the present invention is to provide an air heat pump suitable for low temperature environments, so as to overcome the above-mentioned defects in the prior art.

[0005] According to the present invention, an air heat pump suitable for use in a low-temperature environment comprises a protective shell, the upper end of the protective shell is provided with two ventilating openings distributed front and back, the two ventilating openings are provided with ventilation mechanisms, a working chamber is provided in the protective shell, the ventilation mechanism comprises a power motor fixedly mounted on the upper side wall of the working chamber, a transmission box is provided at the front and rear ends of the power motor, ventilators are connected to the two ventilators, power rods are provided at the lower ends of the two ventilators and connected to the transmission box, fixing plates are fixedly mounted on the front and rear side walls of the working chamber and rotatably cooperate with the power rods at the ventilators, two symmetrical evaporation plates are provided in the working chamber, and the two evaporation plates are abutted against A cooling pipe, wherein the cooling pipe is clamped at the left and right ends of the evaporator plate, and two left-right symmetrical guide plates are fixedly arranged in the working chamber, and the guide plates are located at the outer ends of the cooling pipes, and a switcher is abutted and rotatably connected on the front and rear side walls of the working chamber, and a ruler-arc plate is fixedly arranged at the middle end of the switcher, and a rotatable electric gear is arranged in the protective shell, and the electric gear is meshed with the ruler-arc plate, and the outer peripheral surface of the switcher can abut against the lower ends of the left and right guide plates respectively, and the ends of the two guide plates away from each other abut against the left and right side walls of the working chamber, and a connecting box is fixedly arranged at the lower end of the protective shell, and a connecting chamber is opened between the protective shell and the connecting box.

[0006] Preferably, two left-right symmetrical air intake pipes are connected to the rear side wall of the working chamber, and two left-right symmetrical exhaust pipes are connected and fixedly provided on the rear end surface of the connecting box, the air intake pipes are connected with an electric control valve, the air intake pipes are located at the lower end part of the guide plate, and two left-right symmetrical connecting boxes are fixedly provided on 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, and the lower end of the connecting box is connected to two connecting pipes, a sliding box that can slide is fixed in the connecting box, and the sliding box can abut and close the cooling pipe opening, an adjusting block is connected between the connecting box and the sliding box, heat absorption plates are provided at the front and rear ends of the connecting box, the two heat absorption plates are connected to the front and rear ends of the adjusting block, the connecting pipe is connected to the condenser, and a drain outlet is provided at the lower end of the connecting box.

[0007] Preferably, a temperature measuring device is provided on the guide plate, a temperature measuring plate is connected to the temperature measuring device, the temperature measuring plate abuts against the end surface of the guide plate against the evaporation plate, and a control panel is installed at the protective shell and is electrically connected to the temperature measuring device and the power source at the electric gear.

[0008] The beneficial effects of the present invention are:

[0009] There are cooling pipes at the left and right ends of the evaporator plate. Cooling liquid is injected into the cooling pipes through the connecting box, so as to reduce the temperature at the cooling pipes, thereby improving the absorption efficiency at the cooling pipes and reducing the use requirements under low temperature conditions, thereby increasing the upper and lower limits of the evaporator plate's absorption temperature.

[0010] When the temperature changes, the size of the opening between the cooling pipe and the connecting pipe is adjusted by the sliding box, thereby automatically adjusting the flow at the cooling pipe, improving the absorption efficiency in a high temperature environment, and being able to be used normally in a low temperature environment.

[0011] By intermittently and alternately performing defrosting and heat absorption work on the left and right evaporation plates, the evaporation plates can be defrosted without stopping the heating supply, thereby avoiding a drop in indoor temperature caused by the inability to use the device for heating during the defrosting process. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0014] Figure 3 The present invention Figure 1 A schematic diagram of a top view structure;

[0015] Figure 4 The present invention Figure 1 A schematic diagram of the front view structure of

[0016] Figure 5 The present invention Figure 3 Schematic diagram of the cross section of AA;

[0017] Figure 6 The present invention Figure 4 A partial cross-sectional schematic diagram of the middle BB;

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

[0019] Figure 8 is a schematic diagram of the appearance of the evaporation plate part of the present invention;

[0020] Fig. 9 The present invention Figure 1 Schematic diagram of the appearance after removing the protective shell and ventilation mechanism;

[0021] Fig.10 is a schematic diagram of the appearance of the compressor part of the present invention;

[0022] In the figure:

[0023] 10. Protective shell; 11. Ventilation port; 12. Ventilator; 13. Fixed plate; 14. Transmission box; 15. Power motor; 16. Ventilation mechanism; 17. Inlet pipe; 18. Electric control valve; 19. Connection box; 20. Heat absorber; 21. Connecting box; 22. Working chamber; 23. Connecting chamber; 24. Guide plate; 25. Cooling pipe; 26. Evaporation plate; 27. Thermometer; 28. Thermometer plate; 29. ​​Sliding box; 30. Adjustment block; 31. Connecting pipe; 32. Switcher; 33. Ruler plate; 34. Electric gear; 35. Exhaust pipe. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] Embodiment 1:

[0026] Reference Figure 1-Figure 10According to an embodiment of the present invention, an air heat pump suitable for use in a low-temperature environment includes a protective shell 10, the upper end of the protective shell 10 is provided with two ventilating openings 11 distributed front and back, the two ventilating openings 11 are provided with a ventilation mechanism 16, a working chamber 22 is provided in the protective shell 10, the ventilation mechanism 16 includes a power motor 15 fixedly arranged on the upper side wall of the working chamber 22, the front and rear ends of the power motor 15 are provided with a transmission box 14, the two ventilating openings 11 are connected with ventilators 12, the lower ends of the two ventilators 12 are provided with power rods connected to the transmission box 14, and the front and rear side walls of the working chamber 22 are provided with a power rod 16 connected to the transmission box 14. A fixing plate 13 is fixedly provided on the upper side to rotate with the power rod at the ventilator 12, two symmetrical evaporation plates 26 are provided in the working chamber 22, and cooling pipes 25 are abutted on the two evaporation plates 26, and the cooling pipes 25 are clamped at the left and right ends of the evaporation plates 26, and two symmetrical guide plates 24 are fixedly provided in the working chamber 22, and the guide plates 24 are located at the outer ends of the cooling pipes 25, and a switch 32 is abutted and rotatably connected on the front and rear side walls of the working chamber 22, and a ruler arc plate 33 is fixedly provided at the middle end of the switch 32, and a rotatable electric gear 34 is provided in the protective housing 10, and the electric gear 34 The outer peripheral surface of the switch 32 can respectively abut against the lower ends of the left and right guide plates 24, and the ends of the two guide plates 24 that are away from each other 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, and a connecting chamber 23 is connected between the protective shell 10 and the connecting box 21. Two left-right symmetrical intake pipes 17 are connected to the rear side wall of the working chamber 22, and two left-right symmetrical exhaust pipes 35 are fixedly provided on the rear end surface of the connecting box 21. The intake pipe 17 is connected with an electric control valve 18, and the intake pipe 17 is located at the lower end of the guide plate 24. Two left-right symmetrical connection boxes 19 are fixedly provided on the lower side wall of the working chamber 22. The upper end of the connection box 19 is communicated with the two openings of the cooling pipe 25. The lower end of the connection box 19 is communicated with two connecting pipes 31. A sliding box 29 capable of sliding is fixedly provided in the connection box 19. The sliding box 29 can abut against and seal the opening of the cooling pipe 25. An adjusting block 30 is connected between the connection box 19 and the sliding box 29. Heat absorbing sheets 20 are provided at both the front and rear ends of the connection box 19. The two heat absorbing sheets 20 are connected to the front and rear ends of the adjusting block 30. The connecting pipe 31 is communicated with the condenser. A drain port is provided at the lower end of the connecting box 21.

[0027] The ventilation mechanism 16 is powered on and works through the power motor 15, which transmits the power at the front and rear power ends of the power motor 15 to the front and rear transmission boxes 14, so that the power rods on the two ventilators 12 connected to the transmission box 14 rotate, and the fan blades are driven to rotate through the power rods, and then the outer air is drawn from the vent 11 into the working chamber 22, and the two guide plates 24 are closed by abutting the side walls of the working chamber 22 at the ends away from each other, so as to prevent the air from being discharged downward from the left and right sides of the working chamber 22. Under the setting of the switch 32, The air flows downward through the gap between the switch 32 and the guide plate 24, enters between the guide plate 24 and the evaporation plate 26, and performs heat exchange at the evaporation plate 26. The exchanged air enters the connection box 21 through the connecting cavity 23, and is discharged outward through the exhaust pipe 35 at the connection box 21. The condensed water generated at the evaporation plate 26 flows downward into the connection box 21 under the guidance of the evaporation plate 26. A drain port is provided at the lower end of the connection box 21, and a pipe is connected to the drain port to discharge the condensed water and the water after the frost melts in the connection box 21.

[0028] The connecting pipe 31 is connected to the condenser, and condensed water is poured into the connecting box 19 through the connecting pipe 31. The connecting box 19 contacts the adjusting block 30 but does not contact the condensed water in the connecting box 19. Heat is conducted through the heat absorbing sheet 20. 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 at the sliding box 29 and the cooling pipe 25 is opened. The connecting pipe 31 is connected to the cooling pipe 25 through the connecting box 19, and coolant is poured 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 sprays and drives the sliding box 29 to slide, shrinking the opening at the cooling pipe 25 and the connecting box 1 9 is closed, so as to control the flow rate entering the cooling pipe 25, and then adjust the temperature of the evaporation plate 26 automatically. When the temperatures at the inner and outer ends of the protective shell 10 are inconsistent, for example, when the temperature at the heat absorption plate 20 at the inner end (also the front end) is high (at this time, the guide plate 24 and the evaporation plate 26 are in heating and defrosting operation), when the temperature at the heat absorption plate 20 at the outer end is low, the temperature difference between the inner and outer ends is large, so that one end of the adjustment block 30 expands and the other end contracts. At this time, the sliding box 29 connected to the adjustment block 30 is subjected to an inclined pulling force. When the sliding box 29 is abutted against the inner end surface of the connecting box 19, the sliding box 29 does not slide. At this time, the sliding box 29 is in a state of closing the cooling pipe 25.

[0029] Embodiment 2:

[0030] Referring to Example 1, according to an embodiment of the present invention, an air heat pump suitable for use in a low temperature environment, optionally, a temperature measuring device 27 is provided on the guide plate 24, a temperature measuring plate 28 is connected to the temperature measuring plate 27, the temperature measuring plate 28 abuts against the end surface of the evaporation plate 26 and the guide plate 24, and a control panel is installed at the protective housing 10 and is electrically connected to the temperature measuring device 27 and the power source at the electric gear 34;

[0031] The temperature detector 27 provided on the guide plate 24 is powered on in a normal working state, and the temperature is detected by the temperature detector 27 at the joint of the temperature detector 28 and the guide plate 24 through the temperature detector 27, and the detected temperature at the temperature detector 27 is compared with the set temperature. When the set temperature value is greater than the detected temperature value, the control end at the control panel automatically controls the electric gear 34 to rotate, and the electric gear 34 is meshed with the ruler plate 33, so that the switch 32 rotates, and the guide plate 24 at the other end is connected with the working chamber 22;

[0032] For example, the temperature at the evaporation plate 26 at the left end is relatively low. When frost occurs at the evaporation plate 26, data processing is performed through the temperature value detected by the thermometer 27 at the left end. After a period of time, the electric gear 34 is controlled to rotate through the control panel, so that Figure 5 As shown, the guide plate 24 at the left end is in communication with the working chamber 22, and the guide plate 24 at the right end is in communication with the working chamber 22;

[0033] The air at the outer end enters the working chamber 22 through the operation of the ventilation mechanism 16, and is located at the middle end of the working chamber 22, and is blocked by two guide plates 24. Under the operation of the ventilation mechanism 16, the air flows downward, flows through the gap between the switch 32 and the guide plate 24, and contacts the evaporation plate 26, so that the heat of the air is transferred to the evaporation plate 26 for absorption. Under the guidance of the guide plate 24, the air contacts the left and right end surfaces of the evaporation plate 26, and enters the connecting box 21 through the opening of the connecting chamber 23, and is discharged to the outside through the exhaust pipe 35 at the connecting box 21;

[0034] The outside air is discharged through the exhaust pipe 35 after heat exchange at the evaporation plate 26. A compressor is connected to the lower end of the evaporation plate 26. The compressor is used to compress the low-pressure steam generated at the evaporation plate 26 and convert it into high-temperature and high-pressure steam for subsequent heat recovery. As shown in the protective housing 10, the air inlet pipe 17 extends downward and wraps around the outer end of the compressor to absorb the heat generated by the compressor when it is working. The left and right ends of the compressor are connected by pipes. The electric control valve 18 at one end is opened through the control panel, for example Figure 5As shown, the guide plate 24 at the left end contacts with the air to absorb heat, and the guide plate 24 at the right end is closed. At this time, the electric control valve 18 at the right end is controlled to open, and the electric control valve 18 at the left end is closed, so that the hot air absorbed at the intake pipe 17 flows back through the intake pipe 17 at the right end and enters the guide plate 24 at the right end, and the guide plate 24 is heated and defrosted, and is discharged to the outside through the exhaust pipe 35;

[0035] In a low temperature environment, the left and right alternating working state is performed. In a high temperature environment, when the temperature values ​​detected by the temperature detectors 27 at the left and right ends are higher than the set values, the electric gear 34 controls the arc plate 33 to rotate, so that the switch 32 rotates to the middle position. At this time, the circumference of the switch 32 does not contact the guide plates 24 at the left and right ends. At this time, the air can contact the two evaporation plates 26 through the left and right guide plates 24.

[0036] It can adjust itself by adaptively following the changes in internal and external temperatures, without the need for manual control, which is convenient and fast.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. An air heat pump suitable for use in a low temperature environment, comprising a protective housing (10), characterized in that: The upper end of the protective shell (10) is provided with two ventilation openings (11) distributed front and back, and the two ventilation openings (11) are provided with ventilation mechanisms (16). The protective shell (10) is provided with a working chamber (22), and the working chamber (22) is provided with two symmetrical evaporation plates (26), and the two evaporation plates (26) are both abutted with cooling pipes (25). The working chamber (22) is provided with two symmetrical guide plates (24), and the guide plates (24) are located at the outer ends of the cooling pipes (25). The front and rear ends of the working chamber (22) are provided with a plurality of symmetrical guide plates (24). A switch (32) is abutted against and rotatably connected to the two side walls, a ruler plate (33) is fixedly provided at the middle end of the switch (32), a rotatable electric gear (34) is provided inside the protective shell (10), the electric gear (34) is meshed with the ruler 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, a connecting box (21) is fixedly provided at the lower end of the protective shell (10), and a connecting cavity (23) is opened between the protective shell (10) and the connecting box (21).

2. The air heat pump suitable for low temperature environment according to claim 1, characterized in that: Two left-right symmetrical connection boxes (19) are fixedly provided on the lower side wall of the working chamber (22); the upper end of the connection box (19) is communicated with the two openings of the cooling pipe (25); the lower end of the connection box (19) is communicated with two connecting pipes (31); a sliding box (29) that can slide is fixedly provided in the connection box (19); the sliding box (29) can abut against and seal the opening of the cooling pipe (25); an adjusting block (30) is connected between the connection box (19) and the sliding box (29); heat absorbing plates (20) are provided at the front and rear ends of the connection 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 communicated with the condenser; and a drainage port is provided at the lower end of the connecting box (21).

3. The air heat pump suitable for low temperature environment according to claim 2, characterized in that: The guide plate (24) is provided with a temperature measuring device (27), the temperature measuring device (27) is connected to a temperature measuring plate (28), the temperature measuring plate (28) is close to the evaporation plate (26) and abuts against the end surface of the guide plate (24), and the protective housing (10) is provided with a control panel which is electrically connected to the temperature measuring device (27) and a power source at the electric gear (34).

4. The air heat pump suitable for low temperature environment according to claim 3, characterized in that: The ventilation mechanism (16) comprises a power motor (15) fixedly mounted on the upper side wall of the working chamber (22); a transmission box (14) is provided at both the front and rear ends of the power motor (15); ventilators (12) are connected to the two ventilation openings (11); power rods are provided at the lower ends of the two ventilators (12) and are connected to the transmission box (14); and fixed plates (13) are fixedly mounted on both the front and rear side walls of the working chamber (22) and are rotatably matched with the power rods at the ventilators (12).

5. The air heat pump suitable for low temperature environment according to claim 4, characterized in that: Two left-right symmetrical air intake pipes (17) are connected to the rear side wall of the working chamber (22); two left-right symmetrical air exhaust pipes (35) are fixedly connected and connected to the rear end surface of the connecting box (21); an electric control valve (18) is connected to the air intake pipe (17); and the air intake pipe (17) is located at the lower end portion of the guide plate (24).

6. The air heat pump suitable for low temperature environment according to claim 5, characterized in that: The cooling pipe (25) is sandwiched between the left and right ends of the evaporation plate (26), and the ends of the two guide plates (24) that are away from each other abut against the left and right side walls of the working chamber (22).

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