A refrigeration dehumidification system

Abstract

The utility model relates to the field of refrigeration and dehumidification, especially to a refrigeration and dehumidification system. A refrigeration and dehumidification system, comprising a refrigeration and dehumidification unit, a working unit, a heat recovery unit and a control unit; the control unit is arranged at the output end of the working unit, and the output end of the working unit is communicated with the input end of the refrigeration and dehumidification unit and / or the heat recovery unit through the control unit; the output end of the heat recovery unit is communicated with the input end of the refrigeration and dehumidification unit; the input end of the working unit is communicated with the output end of the refrigeration and dehumidification unit; the control unit controls the output end of the working unit to be communicated with the input end of the refrigeration and dehumidification unit and the heat recovery unit at the same time, and the refrigerant output by the working unit is transported to the refrigeration and dehumidification unit and the heat recovery unit. The utility model directly reduces energy consumption by replacing traditional electric heating or boiler heating with the heat recovery unit; the heat dissipation pressure is reduced, the load of the working unit is reduced, the system energy efficiency is improved, and the equipment service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration and dehumidification, and in particular to a refrigeration and dehumidification system. Background Technology

[0002] Traditional computer room air conditioners, in order to maintain a constant temperature and humidity environment, typically employ a cooling-dehumidification scheme. This involves utilizing the fact that the evaporation temperature during cooling is lower than the dew point temperature of the ambient air, causing water in the air to condense and thus releasing a certain amount of latent heat of vaporization, achieving a dehumidification effect. However, in reality, because computer room air conditioners are designed to meet a sensible heat ratio requirement of greater than 90%, the amount of latent heat of vaporization they can obtain is very small, resulting in unsatisfactory dehumidification effects. In practice, they often only achieve good dehumidification results in environments with high temperature and high humidity.

[0003] On the other hand, when the indoor heat load is relatively low, especially for fixed-frequency units, the cooling capacity produced during the dehumidification process is often greater than the indoor heat load. In this case, the computer room unit must turn on additional heating equipment to prevent the computer room from becoming too cold, which greatly reduces the dehumidification efficiency of the air conditioner. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a refrigeration and dehumidification system.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a refrigeration and dehumidification system, including a refrigeration and dehumidification unit, a power unit, a heat recovery unit and a control unit;

[0006] The control unit is located at the output end of the work unit, and the output end of the work unit is connected to the input end of the refrigeration and dehumidification unit and / or the heat recovery unit through the control unit.

[0007] The output end of the heat recovery unit is connected to the input end of the refrigeration and dehumidification unit;

[0008] The input terminal of the power unit is connected to the output terminal of the refrigeration and dehumidification unit;

[0009] The refrigeration and dehumidification system includes an energy-saving dehumidification mode;

[0010] In the energy-saving dehumidification mode, the control unit controls the output terminal of the work unit to be connected to the input terminals of the refrigeration dehumidification unit and the heat recovery unit simultaneously, so as to deliver the refrigerant output by the work unit to the refrigeration dehumidification unit and the heat recovery unit.

[0011] Preferably, the heat recovery unit includes a heat exchange device;

[0012] The input end of the heat exchange device is connected to the control unit, and the output end of the heat exchange device is connected to the input end of the refrigeration and dehumidification unit; the heat exchange device is located on the air supply side of the refrigeration and dehumidification unit.

[0013] Preferably, the control unit includes a flow regulating valve;

[0014] The output end of the work unit is connected to the heat exchange device through the flow regulating valve;

[0015] In the energy-saving dehumidification mode, the flow regulating valve is opened, and the output end of the power unit is connected to the input end of the heat recovery unit through the flow regulating valve.

[0016] Preferably, the refrigeration and dehumidification system further includes a refrigeration and dehumidification mode;

[0017] The refrigeration and dehumidification unit includes an electronic throttling device;

[0018] In the cooling and dehumidification mode, the electronic throttling device adjusts its opening according to the cooling load, the flow regulating valve is closed, and the input end of the heat recovery unit is cut off from the output end of the power unit; the input end of the cooling and dehumidification unit is connected to the output end of the power unit and the output end of the heat recovery unit; the input end of the power unit is connected to the output end of the cooling and dehumidification unit.

[0019] The working unit and the refrigeration and dehumidification unit form a coolant circulation loop so that refrigeration and dehumidification can be performed through the refrigeration and dehumidification unit.

[0020] Preferably, the refrigeration and dehumidification system further includes a high-efficiency dehumidification mode; the refrigeration and dehumidification unit includes an electronic throttling device;

[0021] In the high-efficiency dehumidification mode, the electronic throttling device adjusts its opening according to the dehumidification load, the flow regulating valve is closed, and the input end of the heat recovery unit is cut off from the output end of the power unit.

[0022] The input terminal of the refrigeration and dehumidification unit is connected to the output terminal of the power unit and the output terminal of the heat recovery unit; the input terminal of the power unit is connected to the output terminal of the refrigeration and dehumidification unit.

[0023] The working unit and the refrigeration and dehumidification unit form a coolant circulation loop to achieve efficient dehumidification through the refrigeration and dehumidification unit.

[0024] Preferably, the refrigeration and dehumidification system further includes: a return air temperature and humidity sensor and an outlet air temperature and humidity sensor;

[0025] The return air temperature and humidity sensor is located within a preset range of the return air inlet, and the return air temperature and humidity sensor is used to detect the temperature and humidity of the indoor return air.

[0026] The outlet temperature and humidity sensor is located within the measurement range of the air outlet, and the outlet temperature and humidity sensor is used to detect the temperature and humidity of the air outlet;

[0027] The refrigeration and dehumidification system determines the dehumidification load by collecting humidity data from the return air temperature and humidity sensor and the outlet air temperature and humidity sensor.

[0028] Preferably, the refrigeration and dehumidification system further includes: an evaporation temperature detector and an intake temperature sensor;

[0029] The intake temperature sensor is connected in series between the input terminal of the power unit and the output terminal of the refrigeration and dehumidification unit; the intake temperature sensor is used to monitor the intake port temperature at the input terminal of the power unit.

[0030] The evaporation temperature sensor is located inside the refrigeration and dehumidification unit; the evaporation temperature sensor is used to monitor the refrigeration temperature of the refrigeration and dehumidification unit.

[0031] Preferably, the refrigeration and dehumidification unit further includes a protection component;

[0032] The protection component is connected to the electronic throttling device; the protection component is used to protect the refrigeration and dehumidification unit and the work unit connected to the refrigeration and dehumidification unit.

[0033] Preferably, the refrigeration and dehumidification system further includes: a first one-way valve and a refrigerant pump; the refrigeration and dehumidification unit includes a second one-way valve;

[0034] The first one-way valve is connected in series between the input end and the output end of the refrigeration and dehumidification unit, and in parallel with the power unit;

[0035] The refrigerant pump and the second check valve are connected in series between the refrigeration unit and the heat dissipation unit of the refrigeration and dehumidification unit; the refrigerant pump and the second check valve are connected in parallel.

[0036] The refrigeration and dehumidification system also includes a refrigerant pump mode;

[0037] In refrigerant pump mode, the working unit stops operating, the refrigerant pump starts, and the refrigeration dehumidification unit and / or the heat recovery unit form a refrigerant circulation loop to perform refrigeration dehumidification or energy-saving dehumidification through the refrigeration dehumidification unit.

[0038] The following are the beneficial effects of implementing this utility model:

[0039] This invention uses waste heat recovered by a heat recovery unit to replace traditional electric heating or boiler heating, directly reducing energy consumption. At the same time, it reduces heat dissipation pressure, improves cooling, dehumidification and heat dissipation capabilities, reduces the load on the work unit, thereby improving system energy efficiency and extending equipment life. Attached Figure Description

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0041] Figure 1 This is a schematic diagram of a refrigeration and dehumidification system in one embodiment;

[0042] Figure 2 This is a schematic diagram of the component connections for the refrigeration and dehumidification bucket in one embodiment;

[0043] Figure 3 This is a flowchart of a cooling and dehumidification method in one embodiment. Detailed Implementation

[0044] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0045] A component is referred to as being "fixed to" or "set on" another component, and it may be located directly or indirectly on that other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to that other component.

[0046] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features. "Multiple" means two or more, unless otherwise explicitly defined.

[0047] The terms used above are for ease of description only and should not be construed as limitations on this technical solution.

[0048] This utility model provides a refrigeration and dehumidification system. For example... Figure 1 As shown, the refrigeration and dehumidification system includes a refrigeration and dehumidification unit A, a power unit C, a heat recovery unit B, and a control unit D.

[0049] Specifically, the refrigeration and dehumidification unit A absorbs heat through refrigerant evaporation, lowering the air dew point temperature and causing water vapor in the air to condense and precipitate, thus achieving dehumidification. The work unit C performs work on the gaseous refrigerant, increasing its pressure and temperature, creating conditions for the refrigerant to release heat in the heat recovery unit B. The heat released by the heat recovery unit B is used to heat air, water, or for other purposes, improving the overall energy efficiency of the system. The control unit D controls the connection between the heat recovery unit and the work unit.

[0050] Control unit D is located at the output end of work unit C, and the output end of work unit C is connected to the input end of refrigeration and dehumidification unit A and / or heat recovery unit B through control unit D.

[0051] Furthermore, the control unit D may contain multiple control components, each located in a different position. However, one control component must be located at the output of the work unit C, and this control component controls the connection between the output of work unit C and the input of the refrigeration and dehumidification unit A. In some scenarios, this control component connects the output of work unit C to the inputs of both the refrigeration and dehumidification unit A and the heat recovery unit B.

[0052] The output of heat recovery unit B is connected to the input of refrigeration and dehumidification unit A.

[0053] The input terminal of the work unit C is connected to the output terminal of the refrigeration and dehumidification unit A.

[0054] It should be noted that after the refrigerant in heat recovery unit B heats the supply air, the refrigerant flows from the output end of heat recovery unit B into the input end of refrigeration and dehumidification unit A, where it mixes with the refrigerant flowing out of working unit C.

[0055] The refrigeration and dehumidification system includes an energy-saving dehumidification mode.

[0056] Specifically, when the cooling load is less than or equal to the dehumidification load and the cooling load is less than 0, the energy-saving dehumidification mode is entered. The room no longer requires a cooling load, and the dehumidification unit, the power unit, the heat recovery unit, and the control unit aim at the dehumidification evaporation temperature.

[0057] In energy-saving dehumidification mode, the control unit D controls the output of the work unit C to connect simultaneously with the input of the refrigeration dehumidification unit A and the heat recovery unit B, so that the refrigerant output by the work unit C is delivered to the refrigeration dehumidification unit A and the heat recovery unit B.

[0058] Specifically, to prevent the system from operating at excessively low temperatures, control unit D connects the output of work unit C to the input of the heat recovery unit. The heat load generated by the system operation heats the supply air through heat recovery unit B, ensuring that the supply and return air are synchronized to achieve energy savings. Flow regulation is controlled based on the outlet air temperature. The refrigerant, after being cooled by the supply air, recirculates to the inlet of refrigeration and dehumidification unit A, mixes with the remaining output from work unit D, and then recirculates back to the indoor side.

[0059] This invention directly reduces energy consumption by 20%-40% by replacing traditional electric heating or boiler heating with waste heat recovered by a heat recovery unit. Secondly, the low-temperature supply air after cooling and dehumidification is heated to a suitable temperature (e.g., 25°C) by the heat recovery unit, avoiding the discomfort of cold air and balancing dehumidification and comfort. At the same time, the load on the working unit is reduced due to the reduced pressure of cooling, dehumidification and heat dissipation, which improves the system's energy efficiency ratio (COP) and extends its lifespan. In addition, reducing dependence on external energy not only reduces carbon emissions (approximately 0.5 kg CO2 / h is reduced for every 1 kW of heat recovered), but also enhances the stability of temperature and humidity control through internal heat circulation, reduces environmental fluctuation interference, and achieves multi-dimensional optimization of energy saving, environmental protection and operational reliability.

[0060] In one feasible embodiment, the heat recovery unit includes a heat exchange device.

[0061] The input end of the heat exchanger is connected to the control unit, and the output end of the heat exchanger is connected to the input end of the refrigeration and dehumidification unit; the heat exchanger is located on the air supply side of the refrigeration and dehumidification unit.

[0062] Furthermore, the heat exchange device can be a plate heat exchanger; it is connected to the control unit via an electric valve or a variable frequency fan to adjust the heat recovery rate. It is connected to the inlet of the evaporator or condenser of the refrigeration and dehumidification unit to pre-cool or preheat the air. It is installed in the air supply duct, near the air outlet of the refrigeration and dehumidification unit.

[0063] The heat exchanger can also be a heat pipe heat exchanger; a temperature sensor feeds back a signal to the control unit to adjust the heat pipe's operating status. It connects to the air handling section of the refrigeration and dehumidification unit to achieve heat transfer. It is embedded in the air supply duct and located downstream of the refrigeration and dehumidification unit.

[0064] The heat exchanger can also be a rotary heat exchanger; the rotation speed of the rotor is driven by a motor, and the heat recovery efficiency is adjusted by a control unit. It connects to the fresh air inlet of the refrigeration and dehumidification unit to preheat the fresh air. It is installed on the supply air side, arranged parallel to the refrigeration and dehumidification unit.

[0065] In one executable embodiment, the control unit includes a flow regulating valve.

[0066] Specifically, the flow control valve can be one of the following: an electric control valve, a solenoid valve, or a proportional-integral valve (PI valve).

[0067] The output of the work unit is connected to the heat exchanger via a flow regulating valve.

[0068] Furthermore, the output of the power unit is divided into two paths: one path goes directly into the refrigeration and dehumidification unit, and the other path goes into the heat recovery unit through the flow regulating valve.

[0069] In energy-saving dehumidification mode, the flow regulating valve is opened, and the output end of the power unit is connected to the input end of the heat recovery unit through the flow regulating valve.

[0070] It can be inferred that in the energy-saving dehumidification mode, the refrigerant enters both the heat recovery unit and the refrigeration unit simultaneously, taking into account both energy efficiency and comfort and safety.

[0071] In one executable embodiment, the cooling and dehumidifying system further includes a cooling and dehumidifying mode.

[0072] The refrigeration and dehumidification unit includes an electronic throttling device.

[0073] Specifically, the refrigeration and dehumidification unit uses electrical signals to adjust the valve opening and precisely control the refrigerant flow.

[0074] In cooling and dehumidification mode, the electronic throttling device adjusts its opening according to the cooling load, the flow regulating valve is closed, and the input of the heat recovery unit is disconnected from the output of the power unit. The input of the cooling and dehumidification unit is connected to the outputs of both the power unit and the heat recovery unit. The input of the power unit is connected to the output of the cooling and dehumidification unit.

[0075] Specifically, the refrigeration and dehumidification system can obtain the temperature of each node through temperature sensors, thereby obtaining the refrigeration load, and further control the opening degree of the electronic throttling device according to the refrigeration load.

[0076] Meanwhile, in this mode, the refrigerant will not flow into the heat recovery unit, thereby closing the flow regulating valve. The input end of the heat recovery unit is disconnected from the output end of the work unit, preventing the heat exchange device from heating the supply air, reducing the cooling effect, and improving efficiency.

[0077] The working unit and the refrigeration and dehumidification unit form a coolant circulation loop so that refrigeration and dehumidification can be carried out through the refrigeration and dehumidification unit.

[0078] In one executable embodiment, the refrigeration and dehumidification system further includes a high-efficiency dehumidification mode; the refrigeration and dehumidification unit includes an electronic throttling device.

[0079] In high-efficiency dehumidification mode, the electronic throttling device adjusts its opening according to the dehumidification load, the flow regulating valve closes, and the input end of the heat recovery unit is cut off from the output end of the power unit.

[0080] Specifically, the dehumidification load can be calculated by using humidity sensors to obtain the corresponding humidity from the supply air vent and return air vent respectively.

[0081] The input end of the refrigeration and dehumidification unit is connected to the output end of the power unit and the output end of the heat recovery unit; the input end of the power unit is connected to the output end of the refrigeration and dehumidification unit.

[0082] The working unit and the refrigeration and dehumidification unit form a coolant circulation loop to achieve efficient dehumidification through the refrigeration and dehumidification unit.

[0083] In some feasible embodiments, the sensors at the air supply vents and return vents can be temperature and humidity sensors, acquiring both temperature and humidity data simultaneously.

[0084] In one feasible embodiment, the cooling and dehumidifying system further includes: a return air temperature and humidity sensor and an outlet air temperature and humidity sensor.

[0085] The return air temperature and humidity sensor is located within a preset range of the return air vent and is used to detect the temperature and humidity of the indoor return air.

[0086] The outlet temperature and humidity sensor is located within the measurement range of the air outlet and is used to detect the temperature and humidity at the air outlet.

[0087] The refrigeration and dehumidification system determines the dehumidification load by collecting humidity data from return air temperature and humidity sensors and outlet air temperature and humidity sensors.

[0088] It should be noted that the preset range ensures that the sensor is located in a stable airflow area, avoiding measurement errors caused by local turbulence or dead zones.

[0089] In one feasible embodiment, the refrigeration and dehumidification system further includes an evaporation temperature sensor and an intake temperature sensor.

[0090] The intake temperature sensor is connected in series between the input terminal of the power unit and the output terminal of the cooling and dehumidifying unit; the intake temperature sensor is used to monitor the intake port temperature at the input terminal of the power unit.

[0091] The evaporation temperature sensor is located inside the refrigeration and dehumidification unit; the evaporation temperature sensor is used to monitor the refrigeration temperature of the refrigeration and dehumidification unit.

[0092] In some feasible embodiments, an evaporator temperature sensor acquires the internal temperature and surface temperature of the evaporator. The actual cooling capacity is calculated using the internal and surface temperatures of the evaporator.

[0093] The specific formula is: Actual cooling capacity = (evaporator surface temperature - evaporator internal temperature) * heat transfer coefficient * heat transfer area.

[0094] The intake temperature obtained by the intake temperature sensor is used to calculate the flow rate of the flow control valve.

[0095] Specifically, the difference between the suction temperature and the temperature corresponding to the evaporator saturation pressure is used as the target temperature. The target temperature is then converted into the flow rate of the flow control valve.

[0096] In one feasible embodiment, the cooling and dehumidifying unit also includes a protection component.

[0097] The protection component is connected to the electronic throttling device. The protection component is used to protect the refrigeration / dehumidification unit and the operating unit connected to it.

[0098] In some embodiments, the protective components include one or more of a endotracheal ball valve, a liquid ball valve, a dryer filter, and a sight glass.

[0099] In one executable embodiment, the refrigeration dehumidification system further includes: a first one-way valve and a refrigerant pump. The refrigeration dehumidification unit includes a second one-way valve.

[0100] The first one-way valve is connected in series between the input and output of the refrigeration and dehumidification unit, and in parallel with the power unit.

[0101] When the working unit stops operating and the refrigerant pump is running, the refrigerant flows from the output end of the refrigeration and dehumidification unit to the input end of the refrigeration and dehumidification unit through the first one-way valve.

[0102] The refrigerant pump and the second check valve are connected in series between the refrigeration unit and the heat dissipation unit of the refrigeration and dehumidification unit. The refrigerant pump is connected in parallel with the second check valve.

[0103] A refrigerant pump provides the power for the refrigerant to circulate between refrigeration and heat dissipation units.

[0104] The refrigeration and dehumidification system also includes a refrigerant pump mode.

[0105] In refrigerant pump mode, the work unit stops operating, the refrigerant pump starts, and the refrigeration dehumidification unit and / or heat recovery unit form a refrigerant circulation loop to perform refrigeration dehumidification or energy-saving dehumidification through the refrigeration dehumidification unit.

[0106] In the fluorine pump mode, only a fluorine pump is needed to drive the flow of liquid refrigerant, which significantly reduces power consumption.

[0107] In one executable embodiment, such as Figure 2 As shown, the refrigeration and dehumidification unit A includes: an electronic throttling device A1, a refrigeration device, a heat dissipation device, a protection component, a liquid storage tank A2, and a third one-way valve A3.

[0108] The working unit includes compressor C1 and fourth check valve C2.

[0109] The heat recovery unit includes a heat exchanger B1.

[0110] The control unit includes a flow regulating valve D1.

[0111] Furthermore, the refrigeration unit includes an evaporator A4 and a first fan A5; the heat dissipation unit includes a condenser A6 and a second fan A7; and the protection components include a sight glass A8, a dryer filter A9, a gas pipe ball valve A10, a liquid pipe ball valve A11, and a solenoid valve A12.

[0112] Evaporator A4 is located on the air inlet side of the first fan A5, and heat exchange device B1 is located on the air outlet side of the first fan A5.

[0113] The liquid storage tank A2 is connected in series between the input end of the evaporator A4 and the output end of the condenser A6; the output end of the heat exchange device B1 is connected to the input end of the condenser A6.

[0114] A gas pipe ball valve A10 is connected in series between the output end of compressor C1 and the input end of condenser A6 to control the flow of gaseous refrigerant.

[0115] The third one-way valve A3 is connected in series between the condenser A6 and the gas pipe ball valve A10 to prevent the liquid refrigerant in the pipeline from flowing back.

[0116] The fourth one-way valve C2 is connected in series between the gas pipe ball valve A10, the flow regulating valve D1 and the compressor C1 to prevent gaseous refrigerant from flowing back from the pipeline into the compressor C1.

[0117] The sight glass A8, the dryer filter A9, and the solenoid valve A12 are connected in series between the liquid pipe ball valve A11 and the electronic throttling device A1.

[0118] The flow regulating valve D1 is connected in series with the heat exchanger B1, and the output end of the compressor C1 is connected to the flow regulating valve D1.

[0119] In some scenarios, solenoid valve A12 is connected in series between electronic throttling device A1 and liquid pipe ball valve A11 to cut off the flow path of liquid refrigerant when the power is off.

[0120] In one executable embodiment, such as Figure 2 As shown, the refrigeration and dehumidification system also includes a first one-way valve E and a refrigerant pump F. The refrigeration and dehumidification unit also includes a second one-way valve A13.

[0121] The first one-way valve E is connected in series between the input and output terminals of the refrigeration and dehumidification unit A, and in parallel with the power unit C.

[0122] Furthermore, the first one-way valve E is connected in series between the gas pipe ball valve A10 and the evaporator A4, and in parallel with the compressor C1 and the fourth one-way valve C2.

[0123] The second check valve 110 is connected in series between the liquid storage tank A2 and the liquid pipe ball valve A11 to prevent the liquid refrigerant in the pipeline from flowing back into the liquid storage tank A2.

[0124] The refrigerant pump F and the second one-way valve A13 are connected in series between the refrigeration unit and the heat dissipation unit of the refrigeration and dehumidification unit A. The refrigerant pump F is connected in parallel with the second one-way valve A13.

[0125] Furthermore, the refrigerant pump F and the second one-way valve A13 are connected in series between the liquid receiver A2 and the electronic throttling device A1.

[0126] In some scenarios, the refrigerant pump F and the second check valve A13 are connected in series between the liquid receiver A2 and the electronic throttling device A11.

[0127] In one executable embodiment, such as Figure 2 As shown, the refrigeration and dehumidification system also includes a return air temperature and humidity sensor G, an outlet air temperature and humidity sensor H, an evaporation temperature sensor I, and an intake air temperature sensor J.

[0128] A suction temperature sensor J is connected in series between the compressor input and the evaporator A4 output. The suction temperature sensor monitors the suction port temperature at the compressor C1 input. Its placement here helps improve the accuracy of cooling load calculations.

[0129] Evaporation temperature sensor I is located on evaporator A4; evaporation temperature sensor I is used to monitor the refrigeration temperature of refrigeration and dehumidification unit A.

[0130] The refrigeration and dehumidification system determines the refrigeration load by collecting temperatures from the evaporation temperature sensor I and the suction temperature sensor J.

[0131] The return air temperature and humidity sensor G is located within a preset range at the return air vent, upstream of the evaporator A4. The return air temperature and humidity sensor G is used to detect the temperature and humidity of the indoor air.

[0132] The outlet air temperature and humidity sensor H is located near the air outlet of the heat exchanger B1. The outlet air temperature and humidity sensor H is used to detect the temperature and humidity of the air outlet.

[0133] The refrigeration and dehumidification system determines the dehumidification load by collecting humidity data from return air temperature and humidity sensors and outlet air temperature and humidity sensors.

[0134] Furthermore, the refrigeration and dehumidification system also includes a low-pressure sensor K. The low-pressure sensor K is located upstream of the suction temperature sensor and is connected in parallel with the first one-way valve E, along with the compressor C1 and the suction temperature sensor J. The suction temperature sensor J of compressor C1 and the low-pressure sensor K are configured to ensure that the system operating pressure meets the system design reliability requirements.

[0135] In some embodiments, the compressor is a variable frequency compressor and the second fan is a variable frequency fan.

[0136] The electronic throttling device can be logically adjusted according to the system's cooling or dehumidification target requirements. Furthermore, the electronic throttling device can be an electronic expansion valve.

[0137] This utility model also provides a refrigeration and dehumidification air conditioner, including the above-mentioned refrigeration and dehumidification system.

[0138] Furthermore, cooling and dehumidifying air conditioners can be used in computer rooms to ensure the normal operation of electronic equipment within the room.

[0139] This invention uses logic control of evaporation temperature and return air temperature and humidity of the air conditioning unit to ensure that the dehumidification process continues during the cooling and dehumidification process. At the same time, by controlling and lowering the evaporation temperature below the dew point temperature in the air, the amount of condensation, i.e. the amount of dehumidification, may be increased.

[0140] This utility model also provides a refrigeration and dehumidification method for use in the aforementioned refrigeration and dehumidification system. For example... Figure 3 As shown, the refrigeration and dehumidification methods include:

[0141] Get indoor air humidity and indoor air temperature.

[0142] Calculate the cooling load and dehumidification load based on the indoor air temperature and humidity.

[0143] The cooling mode is determined based on the cooling load and dehumidification load.

[0144] If the cooling mode is energy-saving dehumidification mode, the output of the power unit is connected to the input of the cooling dehumidification unit and the heat recovery unit through the control unit.

[0145] Furthermore, the control unit includes a flow regulating valve; if the cooling mode is energy-saving dehumidification mode, the flow regulating valve is opened.

[0146] In some scenarios, before opening the flow regulating valve, the evaporation temperature is calculated based on the dehumidification capacity and compared with the detected evaporation temperature to obtain the actual evaporation temperature requirement and the supply air temperature.

[0147] The opening of the flow regulating valve is controlled according to the required supply air temperature, while the compressor fan and electronic expansion valve are adjusted according to the actual evaporation temperature requirement.

[0148] After the refrigerant performs work through the work unit, it is discharged from the output end of the work unit to the refrigeration and dehumidification unit and the heat recovery unit.

[0149] The refrigeration and dehumidification unit uses the refrigerant output from the work unit to refrigerate and dehumidify the return air, thus obtaining dry air.

[0150] The heat recovery unit uses the refrigerant output from the work unit to heat the dry air, resulting in supply air with a return air temperature consistent with the supply air temperature.

[0151] Understandably, when the cooling load is less than the dehumidification load, an energy-saving dehumidification mode is used. At this time, there is no demand for cooling load indoors. The compressor, fan, and electronic expansion valve are controlled based on the dehumidification evaporation temperature (calculated using the dehumidification temperature and dehumidification capacity as targets), with latent heat being the primary factor. To prevent the system from operating at excessively low temperatures, the flow regulating valve opens, allowing the heat load generated by the system to flow into the heat exchanger located at the system's air outlet, heating the unit's supply air. This ensures that the air supply and return air of the air conditioner are aligned, achieving energy savings. The flow regulation is controlled based on the outlet air temperature. The refrigerant, after being cooled by the supply air, recirculates to the condenser inlet, mixes with the remaining compressor exhaust, and then re-enters the condenser, circulating back to the indoor side.

[0152] Assume the total cooling capacity generated during air conditioner operation is Q1, which includes sensible heat cooling capacity and latent heat cooling capacity from phase change during dehumidification. Cool air passes through the indoor evaporator and heat exchanger, and is heated by the motor's heat output Q2. The final net cooling capacity delivered to the indoor environment is Q3. The heat load generated during indoor air conditioner operation is Q4, and the heat load generated by the compressor during cooling to overcome indoor and outdoor temperatures is Q5, which represents the compressor's power consumption. Where:

[0153] Q1 = Q3 + Q2

[0154] Q4 = Q1 + Q5

[0155] To ensure a very low exhaust air volume in the computer room, the requirement is met by providing a heat load of Q3 to the supply air. The heat load generated by the air conditioning operation, Q4 = Q5 + Q3 + Q2, can be provided to the room by adjusting the flow rate to provide a heat load of Q3. The remaining load is dissipated through the external condenser to ensure stable system operation.

[0156] In addition to the above loads, air conditioning units equipped with heating devices require an additional Q3 load on the indoor side to ensure a constant indoor temperature. That is, the total condensing heat load = Q1 + Q5 + Q3 + Q2 + Q3. Both indoor and outdoor loads need to be increased, resulting in a significant reduction in energy efficiency.

[0157] This invention uses logical control of the evaporation temperature and the return air temperature and humidity of the air conditioning unit to ensure that the dehumidification process continues throughout the cooling and dehumidification process. Simultaneously, by controlling the evaporation temperature to be lower than the dew point temperature of the air, the amount of condensation, i.e., the dehumidification capacity, can be increased. Assuming the heat exchange caused by the temperature difference in the air conditioner is Q6 (sensible heat) and the heat exchange caused by dehumidification is Q7 (latent heat), then Q1 = Q6 + Q7. The increase in dehumidification capacity during the dehumidification process leads to an increase in Q7. Therefore, the total cooling capacity can be kept constant by reducing the heat exchange capacity Q6.

[0158] In one executable embodiment, determining the cooling mode based on the cooling load and dehumidification load includes:

[0159] If the cooling load is less than the dehumidification load and the cooling load is less than or equal to 0, then it is in energy-saving dehumidification mode.

[0160] If the cooling load is less than or equal to the dehumidification load, and the cooling load is greater than 0, then it is in high-efficiency dehumidification mode.

[0161] In some scenarios, the high-efficiency dehumidification mode prioritizes dehumidification as the primary control element. The compressor, secondary fan, and electronic expansion valve are adjusted based on the calculated evaporation temperature (which is derived from the dehumidification load) to increase dehumidification capacity while meeting cooling load requirements (i.e., reducing the sensible heat ratio to maintain a constant cooling capacity). However, the flow control valve remains closed during this process.

[0162] Furthermore, when the indoor cooling load is greater than the dehumidification load, a cooling-dehumidification mode is adopted. The compressor, the second fan, and the electronic expansion valve all adjust the indoor temperature according to the cooling load, while the flow regulating valve is closed. The system uses the latent heat generated during the cooling process as the dehumidification target.

[0163] If the cooling load is greater than the dehumidification load, then the mode is cooling and dehumidification.

[0164] If the cooling load is greater than the dehumidification load, the output of the working unit is connected to the cooling and dehumidification unit through the control unit, and the output of the working unit is disconnected from the input of the heat recovery unit through the control unit.

[0165] Furthermore, if the cooling load is greater than the dehumidification load, the flow regulating valve will be closed.

[0166] Understandably, before closing the flow regulating valve, the evaporation temperature is calculated based on the cooling load and compared with the detected evaporation temperature to calculate the required evaporation temperature.

[0167] While closing the flow regulating valve, adjust the compressor, the second fan, and the electronic expansion valve.

[0168] In one executable embodiment, the cooling and dehumidification method stabilizes the system in a state where the dehumidification demand and cooling demand are equal to 0.

[0169] The above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A refrigeration and dehumidification system, characterized in that, It includes a refrigeration and dehumidification unit, a power unit, a heat recovery unit, and a control unit; The control unit is located at the output end of the work unit, and the output end of the work unit is connected to the input end of the refrigeration and dehumidification unit and / or the heat recovery unit through the control unit. The output end of the heat recovery unit is connected to the input end of the refrigeration and dehumidification unit; The input terminal of the power unit is connected to the output terminal of the refrigeration and dehumidification unit; The refrigeration and dehumidification system includes an energy-saving dehumidification mode; In the energy-saving dehumidification mode, the control unit controls the output terminal of the work unit to be connected to the input terminals of the refrigeration dehumidification unit and the heat recovery unit simultaneously, so as to deliver the refrigerant output by the work unit to the refrigeration dehumidification unit and the heat recovery unit.

2. The refrigeration and dehumidification system according to claim 1, characterized in that, The heat recovery unit includes a heat exchange device; The input end of the heat exchange device is connected to the control unit, and the output end of the heat exchange device is connected to the input end of the refrigeration and dehumidification unit; the heat exchange device is located on the air supply side of the refrigeration and dehumidification unit.

3. The refrigeration and dehumidification system according to claim 2, characterized in that, The control unit includes a flow regulating valve; The output end of the work unit is connected to the heat exchange device through the flow regulating valve; In the energy-saving dehumidification mode, the flow regulating valve is opened, and the output end of the power unit is connected to the input end of the heat recovery unit through the flow regulating valve.

4. The refrigeration and dehumidification system according to claim 3, characterized in that, The refrigeration and dehumidification system also includes a refrigeration and dehumidification mode; The refrigeration and dehumidification unit includes an electronic throttling device; In the cooling and dehumidification mode, the electronic throttling device adjusts its opening according to the cooling load, the flow regulating valve is closed, and the input end of the heat recovery unit is cut off from the output end of the power unit; the input end of the cooling and dehumidification unit is connected to the output end of the power unit and the output end of the heat recovery unit; the input end of the power unit is connected to the output end of the cooling and dehumidification unit. The working unit and the refrigeration and dehumidification unit form a coolant circulation loop so that refrigeration and dehumidification can be performed through the refrigeration and dehumidification unit.

5. The refrigeration and dehumidification system according to claim 3, characterized in that, The refrigeration and dehumidification system also includes a high-efficiency dehumidification mode; the refrigeration and dehumidification unit includes an electronic throttling device. In the high-efficiency dehumidification mode, the electronic throttling device adjusts its opening according to the dehumidification load, the flow regulating valve is closed, and the input end of the heat recovery unit is cut off from the output end of the power unit. The input terminal of the refrigeration and dehumidification unit is connected to the output terminal of the power unit and the output terminal of the heat recovery unit; the input terminal of the power unit is connected to the output terminal of the refrigeration and dehumidification unit. The working unit and the refrigeration and dehumidification unit form a coolant circulation loop to achieve efficient dehumidification through the refrigeration and dehumidification unit.

6. The refrigeration and dehumidification system according to claim 5, characterized in that, The refrigeration and dehumidification system also includes: a return air temperature and humidity sensor and an outlet air temperature and humidity sensor; The return air temperature and humidity sensor is located within a preset range of the return air inlet, and the return air temperature and humidity sensor is used to detect the temperature and humidity of the indoor return air. The outlet temperature and humidity sensor is located within the measurement range of the air outlet, and the outlet temperature and humidity sensor is used to detect the temperature and humidity of the air outlet. The refrigeration and dehumidification system determines the dehumidification load by collecting humidity data from the return air temperature and humidity sensor and the outlet air temperature and humidity sensor.

7. The refrigeration and dehumidification system according to claim 4, characterized in that, The refrigeration and dehumidification system also includes: an evaporation temperature detector and an intake temperature sensor; The intake temperature sensor is connected in series between the input terminal of the power unit and the output terminal of the refrigeration and dehumidification unit; the intake temperature sensor is used to monitor the intake port temperature at the input terminal of the power unit. The evaporation temperature sensor is located inside the refrigeration and dehumidification unit; the evaporation temperature sensor is used to monitor the refrigeration temperature of the refrigeration and dehumidification unit.

8. The refrigeration and dehumidification system according to claim 4, characterized in that, The refrigeration and dehumidification unit also includes a protection component; The protection component is connected to the electronic throttling device; the protection component is used to protect the refrigeration and dehumidification unit and the work unit connected to the refrigeration and dehumidification unit.

9. The refrigeration and dehumidification system according to claim 1, characterized in that, The refrigeration and dehumidification system further includes: a first check valve and a refrigerant pump; the refrigeration and dehumidification unit includes a second check valve; The first one-way valve is connected in series between the input end and the output end of the refrigeration and dehumidification unit, and in parallel with the power unit; The refrigerant pump and the second check valve are connected in series between the refrigeration unit and the heat dissipation unit of the refrigeration and dehumidification unit; the refrigerant pump and the second check valve are connected in parallel. The refrigeration and dehumidification system also includes a refrigerant pump mode; In refrigerant pump mode, the working unit stops operating, the refrigerant pump starts, and the refrigeration dehumidification unit and / or the heat recovery unit form a refrigerant circulation loop to perform refrigeration dehumidification or energy-saving dehumidification through the refrigeration dehumidification unit.

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