Hot air device for extended-range heat pump and control method

Abstract

The invention relates to the technical field of heat pumps, in particular to a hot air device for an extended-range heat pump and a control method.The hot air device for the extended-range heat pump comprises a solar energy absorption heat box, and the solar energy absorption heat box is provided with a heat absorption cavity; the lighting and heat insulation cover plate is made of a transparent material, and the lighting and heat insulation cover plate is arranged on the solar energy absorption heat box in a covering mode; an air inlet of the hot air pipeline is communicated with the heat absorption cavity; the hot air fan is arranged at an air outlet of the hot air pipeline; the hot air guiding device is communicated with an air outlet of the hot air pipeline, the hot air guiding device is provided with a plurality of air outlet holes, and hot air can be blown to the surface of a heat exchanger of the heat pump through the air outlet holes to be heated. Solar energy can be conveniently collected, the utilization rate is high, the solar energy is utilized, the air inlet temperature of the heat pump is increased, the heating capacity of the heat pump is increased, and the frostless continuous operation time is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pumps, and in particular to a hot air device and a control method for a range-extended heat pump. Background Art

[0002] Current air-energy heat pump products, when coupled with solar energy, can reduce the energy consumption of heat pumps by utilizing solar energy. In the prior art, the principle of conventional solar water heaters is used to transfer solar energy to water, and then the heat in the water is transferred to the air through a heat exchanger for use by air-energy heat pumps. The traditional method of using solar energy to prepare hot water is very expensive. In order to insulate the water pipes, there are vacuum tubes on the outside of the water pipes, and the preparation method is complicated. Heat is transferred to the air through solar energy, and then the heated air is used to supply the heat exchanger of the air-energy heat pump for heating. However, there is a secondary conversion of energy during use, resulting in a low utilization rate of solar energy.

[0003] Therefore, a hot air device and a control method for an extended-range heat pump are needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a hot air device and a control method for a range-extended heat pump, which are convenient for collecting solar energy and have a high utilization rate.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A hot air device for a range-extended heat pump, comprising:

[0007] A solar energy absorption heat box, wherein the solar energy absorption heat box has a heat absorption chamber;

[0008] A lighting and heat-insulating cover plate, which is made of a transparent material and is arranged on the solar energy absorbing heat box;

[0009] A hot air duct, wherein the air inlet of the hot air duct is connected to the heat absorption chamber;

[0010] A hot air blower, the hot air blower is arranged at the air outlet of the hot air duct;

[0011] A hot air deflector is connected to the air outlet of the hot air duct, and the hot air deflector has a plurality of air outlet holes, through which hot air can be blown to the surface of the heat exchanger of the heat pump for heating.

[0012] In some embodiments, the solar energy absorption heat box has a vacuum insulation cavity, the vacuum insulation cavity is located in the wall plate and the bottom plate of the solar energy absorption heat box, and the heat absorption cavity is not connected to the vacuum insulation cavity.

[0013] In some embodiments, a heat absorbing cavity surface of the solar energy absorbing heat box is provided with a thermally conductive graphene coating.

[0014] In some embodiments, the lighting and heat-insulating cover plate includes at least two layers of transparent plates, and a vacuum insulation layer is provided between adjacent transparent plates.

[0015] In some embodiments, the hot air deflector includes two ventilation pipes spaced apart, a plurality of air guide pipes are spaced apart between the two ventilation pipes, the air guide pipes are connected to the ventilation pipes, and the air outlet holes are provided on the air guide pipes.

[0016] In some embodiments, a wind shield is slidably disposed in the ventilation duct.

[0017] In some embodiments, a temperature sensor is further included. The temperature sensor is disposed at the air inlet of the hot air deflector, and the temperature sensor is electrically connected to the hot air blower through a controller.

[0018] In some embodiments, the solar energy absorption heat box is formed by integral foam injection molding.

[0019] In some embodiments, a plurality of the solar energy absorption heat boxes are provided, and the plurality of the solar energy absorption heat boxes are all connected to the air inlet of the hot air duct.

[0020] The control method uses the above-mentioned range-extended heat pump hot air device to heat the heat exchanger, comprising the following steps:

[0021] Lighting judgment mode:

[0022] The hot air blower is started, the hot air blower speed is reduced to the set speed, and it runs for a first time, and the ambient temperature and the hot air temperature are detected. If the hot air temperature - the ambient temperature ≥ the set temperature value, it is judged that the sunlight is sufficient, and the sunlight sufficient control mode is entered; if the hot air temperature - the ambient temperature < the set temperature value, it is judged that the sunlight is insufficient, and the hot air blower is turned off. After the second time, the sunlight determination is performed again;

[0023] Defrost mode:

[0024] The hot air blower is started and rotates at an initial speed;

[0025] If the hot air temperature is ≥ 0°C at this time, the hot air blower maintains the initial speed;

[0026] If the hot air temperature is less than 0°C at this time, the speed of the hot air fan is adjusted according to the hot air temperature and the temperature difference between the hot air and the ambient temperature to obtain the predicted speed of the hot air fan when the hot air temperature reaches 0°C, the predicted speed = 0°C air outlet speed adjustment ratio multiplied by the initial speed, wherein 0°C air outlet speed adjustment ratio = 1 / {[(temperature difference between hot air temperature and ambient temperature - hot air temperature) + temperature difference between hot air temperature and ambient temperature] / hot air inlet and outlet temperature difference};

[0027] If the predicted speed is ≤ the rated speed multiplied by 0.2, it is considered that it is difficult to provide hot air above 0°C for defrosting, and the hot air blower is turned off;

[0028] If the predicted speed is greater than the rated speed multiplied by 0.2, the speed of the hot air blower is adjusted to the predicted speed until the third time after the defrosting ends, at which time the hot air blower returns to the initial speed.

[0029] Beneficial effects of the present invention:

[0030] The present invention provides a hot air device for an extended-range heat pump, wherein the solar energy absorption heat box has a heat absorption chamber, the light-transmitting heat insulation cover is made of a transparent material, the light-transmitting heat insulation cover is arranged on the solar energy absorption heat box, the air inlet of the hot air duct is connected to the heat absorption chamber, the hot air guide is connected to the air outlet of the hot air duct, and the hot air guide has a plurality of air outlets, and the hot air can be blown to the heat exchanger surface of the heat pump through the air outlets under the action of the hot air blower for heating. In the above manner, solar energy is used to directly heat the air in the heat absorption chamber of the solar energy absorption heat box, and then the hot air is pumped into the hot air guide by the hot air blower, and blown to the heat exchanger surface of the heat pump through the air outlets, thereby heating the heat exchanger. Since the air that absorbs solar energy is directly utilized, there is no secondary conversion of heat, so that the utilization rate of solar energy is relatively high. In addition, since there is no need to arrange a heat-insulating water pipe, it is convenient to collect solar energy.

[0031] A control method provided by the present invention uses the above-mentioned range-extended heat pump hot air device to heat the heat exchanger, which is convenient for collecting solar energy and has a high utilization rate, and can effectively heat the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0033] Figure 1 It is a schematic diagram of a hot air device for a range-extended heat pump of the present invention;

[0034] Figure 2 It is a cross-sectional view of a solar energy absorption heat box in a hot air device for a range-extending heat pump of the present invention;

[0035] Figure 3 It is a schematic diagram of a hot air deflector in a hot air device for a range-extended heat pump of the present invention.

[0036] In the figure:

[0037] 100. Heat exchanger; 1. Solar energy absorption heat box; 11. Heat absorption chamber; 12. Vacuum insulation chamber; 2. Lighting insulation cover; 21. Transparent plate; 22. Vacuum insulation layer; 3. Hot air duct; 4. Hot air fan; 5. Hot air deflector; 51. Ventilation duct; 511. Wind shield; 52. Air guide duct; 521. Air outlet. DETAILED DESCRIPTION

[0038] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0039] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0040] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0041] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0042] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0043] In order to collect solar energy and ensure a high utilization rate, Figure 1-Figure 3 As shown, the present invention provides a hot air device for a range-extended heat pump. The hot air device for a range-extended heat pump comprises a solar energy absorption heat box 1, a lighting and heat insulation cover plate 2, a hot air duct 3, a hot air blower 4 and a hot air guide 5.

[0044] Among them, the solar energy absorption heat box 1 has a heat absorption chamber 11. The lighting and heat insulation cover plate 2 is made of transparent material, and the lighting and heat insulation cover plate 2 is covered on the solar energy absorption heat box 1. The air inlet of the hot air duct 3 is connected with the heat absorption chamber 11. The hot air blower 4 is arranged at the air outlet of the hot air duct 3. The hot air deflector 5 is connected with the air outlet of the hot air duct 3, and the hot air deflector 5 has a plurality of air outlet holes 521, and the hot air can be blown to the surface of the heat exchanger 100 of the heat pump through the air outlet holes 521 for heating.

[0045] The sunlight directly heats the air in the heat absorption chamber 11 of the solar energy absorption heat box 1 through the lighting and heat insulation cover plate 2, and then the hot air is pumped to the hot air guide 5 through the hot air blower 4, and blown to the surface of the heat exchanger 100 of the heat pump through the air outlet 521, thereby heating the heat exchanger 100. Since the air that absorbs solar energy is directly utilized, there is no secondary conversion of heat, so the utilization rate of solar energy is high. In addition, since there is no need to arrange heat preservation water pipes, it is convenient to collect solar energy.

[0046] In some embodiments, the solar energy absorption heat box 1 has a vacuum insulation cavity 12, which is located in the wall and bottom plates of the solar energy absorption heat box 1, and the heat absorption cavity 11 is not connected to the vacuum insulation cavity 12. By providing the vacuum insulation cavity 12, heat can be prevented from being exchanged with the outside through the wall and bottom plates of the solar energy absorption heat box 1, thereby ensuring the heat collection effect of the solar energy absorption heat box 1.

[0047] In some embodiments, a heat-conducting graphene coating is provided on the surface of the heat absorption chamber 11 of the solar energy absorption heat box 1. By applying the heat-conducting graphene coating, the efficiency of the solar energy absorption heat box 1 in absorbing solar energy can be effectively improved.

[0048] In some embodiments, the lighting and heat-insulating cover plate 2 includes at least two layers of transparent plates 21, and a vacuum insulation layer 22 is provided between adjacent transparent plates 21. Through the above arrangement, it is convenient for sunlight to pass through the lighting and heat-insulating cover plate 2 to heat the air in the solar energy absorption heat box 1, and at the same time, because the lighting and heat-insulating cover plate 2 has the vacuum insulation layer 22, it is possible to reduce the heat dissipated through the lighting and heat-insulating cover plate 2.

[0049] In some embodiments, the hot air deflector 5 includes two ventilation pipes 51 arranged at intervals, and a plurality of air guide pipes 52 are arranged at intervals between the two ventilation pipes 51. The air guide pipes 52 are connected to the ventilation pipes 51, and air outlet holes 521 are provided on the air guide pipes 52. Through the above arrangement, a plurality of air guide pipes 52 can be used to cover a larger area of ​​the heat exchanger 100, so that the heat exchanger 100 can be effectively heated as needed.

[0050] In some embodiments, a windshield block 511 is slidably provided in the ventilation pipe 51. When the hot air blower 4 is not working, the windshield block 511 will naturally fall down due to the action of gravity; when the hot air blower 4 is turned on, the windshield block 511 slides upward under the action of hot air, and the height of the windshield block 511 can be adjusted by adjusting the speed of the blower, so that the air guide pipes 52 at different heights are connected to the ventilation pipe 51, and the distribution control of the hot air is realized.

[0051] In some embodiments, the hot air device for the range-extended heat pump further includes a temperature sensor, which is disposed at the air inlet of the hot air guide 5, and the temperature sensor is electrically connected to the hot air blower 4 through the controller. By providing the temperature sensor, the hot air temperature can be collected in real time, and the hot air blower 4 can be controlled according to the hot air temperature, thereby ensuring efficient heating of the heat exchanger 100.

[0052] In some embodiments, the solar energy absorption heat box 1 is formed by integral foam injection molding. In this way, the solar energy absorption heat box 1 is easy to manufacture quickly, and the heat dissipation can be further reduced by utilizing the heat preservation performance of the foam.

[0053] In some embodiments, multiple solar energy absorption heat boxes 1 are provided, and the multiple solar energy absorption heat boxes 1 are all connected to the air inlet of the hot air duct 3. Through the above arrangement, sufficient hot air supply can be further guaranteed, thereby ensuring effective heating of the heat exchanger 100.

[0054] This embodiment also provides a control method, which uses the above-mentioned range-extended heat pump hot air device to heat the heat exchanger 100, including the following steps:

[0055] Lighting judgment mode:

[0056] Start the hot air fan 4, lower the speed of the hot air fan 4 to the set speed, run for the first time, detect the ambient temperature and the hot air temperature, if the hot air temperature - ambient temperature ≥ the set temperature value, it is judged that the sunlight is sufficient at this time, and enter the sunlight sufficient control mode. When the sunlight sufficient control mode is executed, the speed of the hot air fan 4 is adjusted according to the temperature difference between the hot air and the environment at intervals of the set time. When the speed of the hot air fan 4 is unloaded to 10% of the rated speed, the hot air fan 4 is turned off and the light determination mode is re-entered. In the above manner, the speed of the hot air fan 4 is adjusted to reduce the power consumption of the hot air fan 4 while ensuring the heat exchange efficiency. If the hot air temperature - ambient temperature < the set temperature value, it is judged that the sunlight is insufficient, the hot air fan 4 is turned off, and the light determination is performed again after the second time.

[0057] Defrost mode:

[0058] The hot air fan 4 is started and rotates at the initial speed; if the hot air temperature is ≥0°C at this time, the hot air fan 4 maintains the initial speed; if the hot air temperature is less than 0°C at this time, the speed of the hot air fan 4 is adjusted according to the hot air temperature and the temperature difference between the hot air and the ambient temperature, and the predicted speed of the hot air fan 4 is obtained when the hot air temperature reaches 0°C, the predicted speed = 0°C air outlet speed adjustment ratio multiplied by the initial speed, wherein 0°C air outlet speed adjustment ratio = 1 / {[(temperature difference between hot air temperature and ambient temperature - hot air temperature) + temperature difference between hot air temperature and ambient temperature] / hot air inlet and outlet temperature difference}; if the predicted speed is ≤ rated speed multiplied by 0.2, it is considered that it is difficult to provide hot air exceeding 0°C for defrosting at this time, and the hot air fan 4 is turned off; if the predicted speed is greater than rated speed multiplied by 0.2, the speed of the hot air fan 4 is adjusted to the predicted speed at this time, until the hot air fan 4 returns to the initial speed after the third period of defrosting ends. Through the above-mentioned method, it is possible to accurately judge whether to perform the defrosting action. When the defrosting can be performed, the hot air blower 4 is effectively controlled to ensure that the defrosting work proceeds smoothly.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A hot air device for a range-extended heat pump, characterized in that: include: A solar energy absorption heat box (1), wherein the solar energy absorption heat box (1) has a heat absorption chamber (11); A lighting and heat-insulating cover plate (2), wherein the lighting and heat-insulating cover plate (2) is made of a transparent material and is arranged on the solar energy absorption heat box (1); A hot air duct (3), wherein an air inlet of the hot air duct (3) is in communication with the heat absorption chamber (11); A hot air blower (4), the hot air blower (4) being arranged at the air outlet of the hot air duct (3); A hot air deflector (5), the hot air deflector (5) being connected to the air outlet of the hot air duct (3), and the hot air deflector (5) having a plurality of air outlet holes (521), through which the hot air can be blown to the surface of the heat exchanger (100) of the heat pump for heating.

2. The hot air device for a range-extended heat pump according to claim 1, characterized in that: The solar energy absorption heat box (1) has a vacuum insulation cavity (12), the vacuum insulation cavity (12) is located in the wall plate and the bottom plate of the solar energy absorption heat box (1), and the heat absorption cavity (11) and the vacuum insulation cavity (12) are not connected to each other.

3. The hot air device for a range-extended heat pump according to claim 1, characterized in that: The surface of the heat absorption cavity (11) of the solar energy absorption heat box (1) is provided with a heat-conducting graphene coating.

4. The hot air device for a range-extended heat pump according to claim 1, characterized in that: The lighting and heat-insulating cover plate (2) comprises at least two layers of transparent plates (21), and a vacuum heat-insulating layer (22) is provided between adjacent transparent plates (21).

5. The hot air device for a range-extended heat pump according to claim 1, characterized in that: The hot air deflector (5) comprises two ventilation pipes (51) arranged at intervals, a plurality of air guide pipes (52) are arranged at intervals between the two ventilation pipes (51), the air guide pipes (52) are connected to the ventilation pipes (51), and the air outlet holes (521) are provided on the air guide pipes (52).

6. The hot air device for a range-extended heat pump according to claim 5, characterized in that: A windshield block (511) is slidably arranged in the ventilation pipe (51).

7. The hot air device for a range-extended heat pump according to claim 1, characterized in that: It also includes a temperature sensor, which is arranged at the air inlet of the hot air deflector (5), and the temperature sensor is electrically connected to the hot air blower (4) through a controller.

8. The hot air device for a range-extended heat pump according to claim 1, characterized in that: The solar energy absorption heat box (1) is formed by integral foam injection molding.

9. The hot air device for a range-extended heat pump according to claim 1, characterized in that: A plurality of the solar energy absorption heat boxes (1) are provided, and the plurality of the solar energy absorption heat boxes (1) are all connected to the air inlet of the hot air duct (3).

10. A control method, characterized in that: Using the hot air device for a range-extended heat pump as claimed in any one of claims 1 to 9 to heat a heat exchanger (100) comprises the following steps: Lighting judgment mode: The hot air blower (4) is started, the speed of the hot air blower (4) is reduced to a set speed, and the operation is performed for a first time period, and the ambient temperature and the hot air temperature are detected. If the hot air temperature minus the ambient temperature is greater than or equal to the set temperature value, it is determined that the sunlight is sufficient, and the sunlight sufficient control mode is entered; if the hot air temperature minus the ambient temperature is less than the set temperature value, it is determined that the sunlight is insufficient, and the hot air blower (4) is turned off. After a second time period, the sunlight determination is performed again; Defrost mode: The hot air blower (4) is started and rotates at an initial speed; If the hot air temperature is ≥ 0°C at this time, the hot air blower (4) maintains the initial rotation speed; If the hot air temperature is less than 0°C at this time, the speed of the hot air fan (4) is adjusted according to the hot air temperature and the temperature difference between the hot air and the ambient temperature to obtain the predicted speed of the hot air fan (4) when the hot air temperature reaches 0°C, the predicted speed = 0°C air outlet speed adjustment ratio multiplied by the initial speed, wherein the 0°C air outlet speed adjustment ratio = 1 / {[(temperature difference between hot air temperature and ambient temperature - hot air temperature) + temperature difference between hot air temperature and ambient temperature] / hot air inlet and outlet temperature difference}; If the predicted speed is less than or equal to the rated speed multiplied by 0.2, it is considered that it is difficult to provide hot air above 0°C for defrosting, and the hot air blower (4) is turned off; If the predicted speed is greater than the rated speed multiplied by 0.2, the speed of the hot air blower (4) is adjusted to the predicted speed until the third period of defrosting ends, at which time the hot air blower (4) returns to the initial speed.

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