Temperature and humidity independent control system and method for recovering condensation waste heat

Abstract

The present invention provides a temperature and humidity independent control system and method for recovering condensation waste heat, which includes a compressor, an outdoor heat exchanger, a throttling unit, an outdoor fresh air dehumidification device, an indoor cooling device, and a four-way reversing valve that are connected in sequence in a closed loop; it further includes a heat absorption device arranged at the outdoor heat exchanger for absorbing the heat of the outdoor heat exchanger; and a heat dissipation device arranged between the outdoor fresh air dehumidification device and the indoor cooling device for releasing heat to the pipeline between the outdoor fresh air dehumidification device and the indoor cooling device. Under the refrigeration condition, this temperature and humidity independent control system for recovering condensation waste heat can recover the waste heat of the outdoor unit condenser, heat the low-temperature refrigerant by means of solution circulation, so that the air-conditioning system can operate at two different evaporation temperatures under the refrigeration condition, that is, the outdoor fresh air dehumidification device and the indoor cooling device have different evaporation temperatures, realizing the temperature and humidity independent control of the air-conditioning system.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning and energy-saving related equipment, and particularly relates to an independent temperature and humidity control system and method for recovering condensation waste heat. Background Art

[0002] In recent years, with the aggravation of environmental pollution and the exhaustion of energy, it is necessary to continuously improve air conditioning technology and adopt efficient and energy-saving technical means to achieve the goal of air conditioning regulation. Therefore, independent temperature and humidity control air conditioning technology and heat pump technology have emerged. In an independent temperature and humidity control air conditioning system, evaporators with two evaporation temperatures are required to cool and dehumidify air respectively.

[0003] Chinese Patent with application publication number CN110207418A discloses a heat pump system and control method with double evaporation temperatures. This system realizes the functions of double evaporation temperatures in the refrigeration mode of a single-unit system and double-stage compression with gas injection and enthalpy increase in the heating mode, and can meet the requirements of independent temperature and humidity control, high-temperature strong refrigeration, and low-temperature strong heating in the refrigeration condition. Its compressor is a three-cylinder double-stage variable-frequency compressor, which can select the operation mode of a single low-pressure cylinder or a double low-pressure cylinder according to the working conditions required by the medium-temperature evaporator and the low-temperature evaporator. By using the four-way valve and the four-pipe medium-pressure accumulator, the compatible use of the refrigeration and heating modes is cleverly realized, and the best effects of each mode can be exerted. The sensitivity of the unit to working condition changes, the economy of the unit operation, and the reliability of the compressor operation are all improved. However, in the process of using this air conditioning system, the temperature of the heat transfer medium (refrigerant) in the medium-temperature evaporator and the low-temperature evaporator is changed based on the operation mode of the single low-pressure cylinder or the double low-pressure cylinder of the compressor, resulting in a relatively high cost in the production process of this air conditioning system. Summary of the Invention

[0004] The present invention provides an independent temperature and humidity control system and method for recovering condensation waste heat. This system recovers the waste heat of the outdoor unit condenser and heats the low-temperature refrigerant by means of solution circulation, enabling the air conditioning system to operate at two different evaporation temperatures under the refrigeration condition and realizing the independent temperature and humidity control of the air conditioning system.

[0005] An independent temperature and humidity control system for recovering condensation waste heat includes a compressor, an outdoor heat exchanger, a throttling unit, an outdoor fresh air dehumidifying device, an indoor cooling device, and a four-way reversing valve that are connected in sequence in a closed loop;

[0006] It further includes a heat absorption device, which is arranged at the outdoor heat exchanger and is used to absorb the heat of the outdoor heat exchanger;

[0007] A heat dissipation device is arranged between the outdoor fresh air dehumidifying device and the indoor cooling device and is used to release heat to the pipeline between the outdoor fresh air dehumidifying device and the indoor cooling device.

[0008] Further,

[0009] The heat absorption device and the heat dissipation device are connected through a connecting pipe, and a peristaltic pump is arranged in the connecting pipe. The peristaltic pump is used to make the liquid flow in the heat absorption device, the heating device and the connecting pipe.

[0010] Further,

[0011] The outdoor fresh air dehumidification device is a first evaporator;

[0012] The indoor cooling device is a second evaporator;

[0013] The refrigerant temperature in the second evaporator is higher than the refrigerant temperature in the first evaporator.

[0014] Further,

[0015] The throttling unit includes a first throttling element and a second throttling element.

[0016] Further,

[0017] The heat absorption device includes a plurality of heat absorption coils, and the heat absorption coils are arranged in the outdoor heat exchanger and are evenly distributed in the outdoor heat exchanger.

[0018] Further,

[0019] The heat dissipation device includes a heat dissipation coil, and the heat dissipation coil is arranged at the indoor cooling device in a spiral shape. The spirally arranged heat dissipation coil circumferentially surrounds the pipe between the outdoor fresh air dehumidification device and the indoor cooling device and is closely attached thereto.

[0020] Further,

[0021] It further includes a temperature and humidity detection unit, including a humidity sensor, a temperature sensor, a processor and a display;

[0022] The humidity sensor is arranged at the position of the outdoor fresh air dehumidification device and is used to detect the humidity at the outdoor fresh air dehumidification device and output humidity data;

[0023] The temperature sensor is arranged at the position of the indoor cooling device and is used to detect the temperature at the indoor cooling device and output temperature data;

[0024] After receiving the humidity data and the temperature data, the processor controls the display to display.

[0025] A temperature and humidity independent control method for recovering condensation waste heat includes the following steps:

[0026] Obtain the heat of the outdoor heat exchanger;

[0027] Transfer the obtained heat to the pipe between the outdoor fresh air dehumidification device and the indoor cooling device.

[0028] Further,

[0029] The steps of obtaining the heat of the outdoor heat exchanger include:

[0030] A heat absorption device is arranged around the outdoor heat exchanger. The heat absorption device includes a coiled pipe, and a liquid is arranged inside the heat absorption device;

[0031] A heat dissipation device is arranged and set to be spiral, so that the heat dissipation device circumferentially wraps the pipe between the outdoor fresh air dehumidification device and the indoor cooling device.

[0032] Further,

[0033] A peristaltic pump is arranged between the heat absorption device and the heat dissipation device.

[0034] Other features and advantages of the present invention will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written specification, claims, and drawings.

[0035] Next, through the drawings and embodiments, the technical solutions of the present invention will be further described in detail. Description of the Drawings

[0036] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0037] Figure 1 It is a schematic structural diagram of a temperature and humidity independent control system for recovering condensation waste heat;

[0038] Figure 2 It is a schematic structural diagram of a temperature and humidity detection unit;

[0039] Figure 3 It is a flowchart of a temperature and humidity independent control method for recovering condensation waste heat.

[0040] Reference Signs:

[0041] 1. Compressor; 2. Outdoor heat exchanger; 3. Throttling unit; 31. First throttling element; 32. Second throttling element; 4. Outdoor fresh air dehumidification device; 5. Heat dissipation device; 6. Indoor cooling device; 7. Four-way reversing valve; 8. Heat absorption device; 9. Peristaltic pump; 10. Connecting pipe. Detailed Embodiments

[0042] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] An embodiment of the present invention provides an independent temperature and humidity control system for recovering condensation waste heat. As Figure 1 shown in the structural schematic diagram, it includes a compressor, an outdoor heat exchanger, a throttling unit, an outdoor fresh air dehumidification device, an indoor cooling device, and a four-way reversing valve that are connected in sequence in a closed loop; it also includes a heat absorption device disposed at the outdoor heat exchanger for absorbing the heat of the outdoor heat exchanger; a heat dissipation device disposed between the outdoor fresh air dehumidification device and the indoor cooling device for releasing heat to the pipeline between the outdoor fresh air dehumidification device and the indoor cooling device.

[0044] The independent temperature and humidity control system for recovering condensation waste heat provided by the present invention can recover the waste heat of the outdoor unit condenser, and heat the low-temperature refrigerant by means of solution circulation, so that the air-conditioning system can operate at two different evaporation temperatures under the refrigeration condition, that is, the outdoor fresh air dehumidification device and the indoor cooling device have different evaporation temperatures, that is, the evaporation temperature of the outdoor fresh air dehumidification device is lower than the evaporation temperature of the indoor cooling device, realizing the independent temperature and humidity control of the air-conditioning system. Among them, the outdoor fresh air dehumidification device and the indoor cooling device can be two different evaporators. The outdoor fresh air dehumidification device can be arranged in the outdoor fresh air system, and the indoor cooling device can be fixed to the wall. And compared with the traditional air-conditioning system that controls the outdoor fresh air dehumidification device and the indoor cooling device respectively by adopting the mode of compressors with different powers, it has the advantages of low cost and high practicability.

[0045] Under the refrigeration condition, the present invention uses the fresh air treated by the dehumidification device to remove the indoor moisture load, and uses the indoor air treated by the cooling device to remove the indoor cold load, which can not only effectively control the indoor relative humidity, but also ensure the hygiene and dryness of the indoor terminal device, prevent the pollution of bacteria such as microorganisms, and improve the indoor air quality. Under the heating condition, the independent temperature and humidity control system for recovering condensation waste heat does not work, and at this time, the system conducts normal heating work.

[0046] The evaporation temperature of the outdoor fresh air dehumidification device being lower than the evaporation temperature of the indoor cooling device can achieve fresh air dehumidification, because the fresh air temperature of the outdoor fresh air dehumidification device is lower than the indoor dew point temperature, and the cross-sectional area of the pipeline of the fresh air system has a certain range, resulting in a small ventilation volume, so a lower temperature is required to ensure that the fresh air temperature is lower than the indoor dew point temperature, thereby achieving the effects of dehumidification and preventing the pollution of bacteria such as microorganisms.

[0047] Through the present invention, not only can the condensation waste heat be effectively recovered, but also the suction pressure of the compressor can be increased, the discharge pressure of the compressor can be reduced, the energy consumption of the compressor can be reduced, and the sanitation and drying of the indoor device under the refrigeration condition can be realized, thereby improving both the energy utilization efficiency and the indoor air quality.

[0048] In one embodiment, the heat absorption device and the heat dissipation device are connected through a connecting pipe, and a peristaltic pump is arranged in the connecting pipe. The peristaltic pump is used to make the liquid flow in the heat absorption device, the heat generating device and the connecting pipe. The peristaltic pump can control the flow of the liquid in the connecting pipe, thereby driving the transfer of heat and preheating the liquid in the connecting pipe, so that the refrigerant temperature in the indoor cooling device is lower than the refrigerant temperature at the outdoor fresh air dehumidification device, achieving the purpose and effect of effectively controlling the indoor relative humidity and ensuring the sanitation and drying of the indoor terminal device.

[0049] In one embodiment, the outdoor fresh air dehumidification device is a first evaporator; the indoor cooling device is a second evaporator; the refrigerant temperature in the second evaporator is higher than the refrigerant temperature in the first evaporator. Different evaporators can bring different evaporation temperatures, so that the indoor has the functions of dehumidification and cooling.

[0050] In one embodiment, the throttling unit includes a first throttling element and a second throttling element. The flow direction of the refrigerant is changed by a four-way reversing valve, so that the system can be switched between the heating condition and the refrigeration condition. The refrigerant flows through the first throttling unit under the refrigeration condition and through the second throttling unit under the heating condition, wherein the flow rates of the first throttling unit and the second throttling unit are different to meet the refrigerant flow rates under different working conditions.

[0051] In one embodiment, the heat absorption device includes a plurality of heat absorption coils, and the heat absorption coils are arranged in the outdoor heat exchanger and are evenly distributed in the outdoor heat exchanger. The heat absorption coils can be in full contact with the outdoor heat exchanger, and the heat of the outdoor heat exchanger can be fully absorbed through the heat absorption coils.

[0052] In one embodiment, the heat dissipation device includes a heat dissipation coil, and the heat dissipation coil is arranged in a spiral shape at the indoor cooling device. The spirally arranged heat dissipation coil circumferentially surrounds and is closely attached to the pipeline between the outdoor fresh air dehumidification device and the indoor cooling device.

[0053] In one embodiment, as Figure 2As shown in the figure, it further includes a temperature and humidity detection unit, which includes a humidity sensor, a temperature sensor, a processor, and a display; the humidity sensor is arranged at the position of the outdoor fresh air dehumidification device to detect the humidity at the outdoor fresh air dehumidification device and output humidity data; the temperature sensor is arranged at the position of the indoor cooling device to detect the temperature at the indoor cooling device and output temperature data; after receiving the humidity data and temperature data, the processor controls the display to display. Through the temperature and humidity detection unit, the temperature and humidity can be detected and the temperature data and humidity data can be output, and the processor controls the display to display the temperature data and humidity data respectively.

[0054] A temperature and humidity independent control method for recovering condensation waste heat, as Figure 3 shown in its flowchart, includes the following steps:

[0055] S1. Heat acquisition step: Acquire the heat of the outdoor heat exchanger;

[0056] S2. Heat release step: Transfer the acquired heat to the pipeline between the outdoor fresh air dehumidification device and the indoor cooling device.

[0057] In one embodiment, the step of acquiring the heat of the outdoor heat exchanger includes:

[0058] Set a heat absorption device around the outdoor heat exchanger, where the heat absorption device includes a coil pipe and a liquid is arranged inside the heat absorption device;

[0059] Set a heat dissipation device, and set the heat dissipation device in a spiral shape so that the heat dissipation device circumferentially wraps the pipeline between the outdoor fresh air dehumidification device and the indoor cooling device.

[0060] In one embodiment, a peristaltic pump is arranged between the heat absorption device and the heat dissipation device.

[0061] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A temperature and humidity independent control system for recovering condensation waste heat, characterized in that, It includes a compressor, an outdoor heat exchanger, a throttling unit, an outdoor fresh air dehumidification device, an indoor cooling device, and a four-way reversing valve that are sequentially connected in a closed loop; It further includes a heat absorption device, which is arranged at the outdoor heat exchanger and is used to absorb the heat of the outdoor heat exchanger; A heat dissipation device, which is arranged between the outdoor fresh air dehumidification device and the indoor cooling device and is used to release heat to the pipeline between the outdoor fresh air dehumidification device and the indoor cooling device; The heat absorption device and the heat dissipation device are connected through a connecting pipe, and a peristaltic pump is arranged in the connecting pipe, and the liquid is circulated in the heat absorption device, the heating device and the connecting pipe through the peristaltic pump; The outdoor fresh air dehumidification device is the indoor first evaporator; The indoor cooling device is the indoor second evaporator; The refrigerant temperature in the indoor second evaporator is higher than the refrigerant temperature in the indoor first evaporator; The throttling unit includes a first throttling element and a second throttling element; The heat absorption device includes a plurality of heat absorption coils, and the heat absorption coils are arranged in the outdoor heat exchanger and are evenly distributed in the outdoor heat exchanger; The heat dissipation device includes a heat dissipation coil, and the heat dissipation coil is arranged at the indoor cooling device in a spiral shape. The spirally arranged heat dissipation coil circumferentially surrounds the pipeline between the outdoor fresh air dehumidification device and the indoor cooling device and is closely attached.

2. The independent temperature and humidity control system for recovering condensation waste heat according to claim 1, characterized in that, It further includes a temperature and humidity detection unit, which includes a humidity sensor, a temperature sensor, a processor and a display; The humidity sensor is arranged at the position of the outdoor fresh air dehumidification device and is used to detect the humidity at the outdoor fresh air dehumidification device and output humidity data; The temperature sensor is arranged at the position of the indoor cooling device and is used to detect the temperature at the indoor cooling device and output temperature data; After receiving the humidity data and the temperature data, the processor controls the display to display.

3. A temperature and humidity independent control method for recovering condensation waste heat, including the temperature and humidity independent control system for recovering condensation waste heat described in claim 1, characterized in that, It includes the following steps: Obtain the heat of the outdoor heat exchanger; Transfer the obtained heat to the pipeline between the outdoor fresh air dehumidification device and the indoor cooling device.

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