Low-temperature defrosting system of air energy heat pump swimming pool machine

Abstract

The utility model relates to the field of air energy heat pump swimming pool machines, in particular to a low-temperature defrosting system of an air energy heat pump swimming pool machine, which comprises a fan, an evaporator, a four-way valve and a controller, the fan, the evaporator and the four-way valve are all in communication connection with the controller, airflow output by the fan is guided to the evaporator, a wind speed detector is mounted on the evaporator, and the four-way valve is connected with the controller. The wind speed detector is in communication connection with the controller. The air speed detector is installed on the evaporator, the air speed detector is in communication connection with the controller, the air speed detector judges the frosting condition on the surface of the evaporator by detecting the air speed on the evaporator and feeds back the frosting condition to the controller, and the controller controls whether the four-way valve enters the defrosting action or not according to the frosting condition. And the frost-free defrosting condition is reduced, and the operation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of air - source heat pump pool machines, in particular to a low - temperature defrosting system for an air - source heat pump pool machine. Background Art

[0002] Generally, a refrigeration system is provided in an air - source heat pump pool machine. During the heating mode, a frost layer will form on the evaporator on the outer surface of the main unit. As the operating time of the machine increases, the frost layer on the evaporator will become thicker. Especially in the case of relatively high humidity and relatively low ambient temperature, the frost layer on the outer surface of the evaporator will be thicker and more, and the frosting speed will be faster. Therefore, the heat pump main unit needs to have a defrosting function to remove the frost layer on the outer surface of the evaporator of the heat pump main unit, so as to avoid the frost layer affecting the heat exchange effect of the heat pump. At present, the principle of heat pump defrosting is achieved by reversing the four - way valve. By reversing the four - way valve, the high - temperature and high - pressure gaseous refrigerant on the compressor enters the evaporator, and then the frost layer on the surface is melted. After the frost layer is processed, the four - way valve is reversed to restore the normal heating function.

[0003] The above - mentioned defrosting method generally judges the entry into the defrosting function according to the operating time of the unit and the temperature of the coil on the evaporator. This judgment method is relatively rough. Sometimes, there will be a defrosting operation without frost, that is, in the case of relatively low ambient temperature and relatively low ambient humidity (dry), there is no frost on the evaporator, but the temperature of the coil on the evaporator is low, and when the operating time of the external unit reaches, it will automatically enter the defrosting state, but in fact, there is no frost layer on the surface of the evaporator. And defrosting without frost undoubtedly increases the operating cost. Content of the Utility Model

[0004] To solve the above - mentioned technical problems, the purpose of the utility model is to provide a system that can reduce the operating cost.

[0005] The technical solution adopted by the utility model to solve the problem is: a low - temperature defrosting system for an air - source heat pump pool machine, including a fan, an evaporator, a four - way valve and a controller. The fan, the evaporator and the four - way valve are all communicatively connected to the controller. The air flow output by the fan is directed to the evaporator. An air speed detector is installed on the evaporator, and the air speed detector is communicatively connected to the controller.

[0006] As a further improvement of the above - mentioned technical solution, left and right side plates are provided on the evaporator, and air speed detectors are provided on the inner sides of the left and right side plates.

[0007] As a further improvement of the above - mentioned technical solution, the cross - section of the evaporator is U - shaped.

[0008] As a further improvement of the above - mentioned technical solution, the evaporator includes a coil, and a first temperature sensor is installed on the coil.

[0009] As a further improvement of the above technical solution, it further includes a box body, and the blower, the evaporator, the four-way valve and the controller are all installed in the box body; a second temperature sensor and a humidity detector are installed on the box body, and the second temperature sensor and the humidity detector are both communicatively connected to the controller.

[0010] The beneficial effect of the present utility model is that: by installing a wind speed detector on the evaporator, the wind speed detector is communicatively connected to the controller, and the wind speed detector judges the frosting condition on the surface of the evaporator by detecting the wind speed on the evaporator and feeds it back to the controller. The controller then controls whether the four-way valve enters the defrosting operation according to the frosting condition, reducing the situation of frost-free defrosting and lowering the operation cost. Description of the Drawings

[0011] The present utility model will be further explained below in conjunction with the description of the drawings and the specific embodiments.

[0012] Figure 1 is one of the structural schematic diagrams of the evaporator of the present utility model;

[0013] Figure 2 is the second of the structural schematic diagrams of the evaporator of the present utility model;

[0014] Figure 3 is the structural schematic diagram of the present utility model;

[0015] In the figure: 1 - box body, 12 - evaporator, 121 - left side plate, 122 - right side plate, 123 - coil, 14 - controller, 15 - wind speed detector, 16 - first temperature sensor, 17 - second temperature sensor, 18 - humidity detector. Specific Embodiments

[0016] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0017] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0018] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. shall be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0019] Referring to Figures 1 to 3 , a low-temperature defrosting system for an air-source heat pump pool machine, comprising a fan, an evaporator 12, a four-way valve and a controller 14. The fan, the evaporator 12 and the four-way valve are all communicatively connected to the controller 14. The airflow output by the fan is directed to the evaporator 12. A wind speed detector 15 is installed on the evaporator 12, and the wind speed detector 15 is communicatively connected to the controller 14. When the fan rotates, air will pass between the fins of the evaporator 12. In the case where there is no frost on the surface of the evaporator 12, the normal wind speed is 3-5 m / s. However, if there is frost on the surface of the evaporator 12, that is, the fins are blocked by a frost layer, the overall wind speed will decrease (it may drop to a wind speed of 0.5-1 m / s). The wind speed detector 15 transmits real-time data to the controller 14. When the wind speed drops to a preset value, the controller 14 controls the four-way valve to enter the defrosting operation. By installing the wind speed detector 15 on the evaporator 12, the accuracy of judging whether there is frost on the surface of the evaporator 12 is improved, the situation of defrosting without frost is reduced, and the operation cost is lowered.

[0020] In a preferred embodiment, a left side plate 121 and a right side plate 122 are provided on the evaporator 12, and wind speed detectors 15 are provided on the inner sides of the left side plate 121 and the right side plate 122. By providing the wind speed detectors 15 at two positions, the accuracy of judging whether there is frost on the surface of the evaporator 12 is further improved.

[0021] In a specific embodiment, the cross-section of the evaporator 12 is U-shaped.

[0022] In a preferred embodiment, the evaporator 12 includes a coil 123, and a first temperature sensor 16 is installed on the coil 123. The first temperature sensor 16 is used to detect the temperature of the coil 123. Generally, when the coil 123 reaches -8°C, it is very likely that there is frost on the surface of the evaporator 12. The wind speed detector 15 and the first temperature sensor 16 jointly control the four-way valve. Combining the data of the wind speed detector 15 and the first temperature sensor 16 is to more accurately judge whether there is frost on the surface of the evaporator 12.

[0023] In a preferred embodiment, it further includes a box body 1, and the blower, the evaporator 12, the four-way valve and the controller 14 are all installed in the box body 1; a second temperature sensor 17 and a humidity detector 18 are installed on the side wall of the box body 1, and both the second temperature sensor 17 and the humidity detector 18 are communicatively connected to the controller 14. The second temperature sensor 17 and the humidity detector 18 are both arranged close to the evaporator 12. The humidity detector 18 detects the humidity value of the environment in real time. Generally, when the environmental humidity reaches 80% or higher, frosting is likely to occur under such conditions. Combining the wind speed detector 15 and the humidity detector 18 can more accurately determine whether there is frosting on the surface of the evaporator 12; when the second temperature sensor 17 (ambient temperature) reaches 0°C or lower, after the unit operates for 40 minutes, it will enter the defrosting operation. By adding the second temperature sensor 17 and the humidity detector 18, the accuracy of judging whether there is frosting on the surface of the evaporator 12 is further improved, the situation of defrosting without frost is reduced, and it is ensured that the defrosting function is entered only when there is frosting on the surface of the evaporator 12. In this way, it greatly avoids the defrosting operation of the heat pump machine without frost in a low-temperature environment, reduces the power consumption of the useless work of the unit, and improves the energy-saving effect of the heat pump machine.

[0024] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A low-temperature defrosting system for an air source heat pump pool machine, comprising a blower, an evaporator (12), a four-way valve, and a controller (14). The blower, the evaporator (12), and the four-way valve are all communicatively connected to the controller (14). The air flow output by the blower is directed to the evaporator (12). It is characterized in that: An air velocity detector (15) is installed on the evaporator (12), and the air velocity detector (15) is communicatively connected to the controller (14).

2. The low-temperature defrosting system for an air source heat pump pool machine according to claim 1, characterized in that: A left side plate (121) and a right side plate (122) are provided on the evaporator (12), and air velocity detectors (15) are provided on the inner sides of the left side plate (121) and the right side plate (122).

3. The low-temperature defrosting system for an air source heat pump pool machine according to claim 2, characterized in that: The cross-section of the evaporator (12) is U-shaped.

4. The low-temperature defrosting system for an air source heat pump pool machine according to claim 1, characterized in that: The evaporator (12) includes a coil pipe (123), and a first temperature sensor (16) is installed on the coil pipe (123).

5. The low-temperature defrosting system for an air source heat pump pool machine according to claim 1, characterized in that: It further includes a box body (1), and the blower, the evaporator (12), the four-way valve, and the controller (14) are all installed in the box body (1); A second temperature sensor (17) and a humidity detector (18) are installed on the box body (1), and the second temperature sensor (17) and the humidity detector (18) are both communicatively connected to the controller (14).

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