Variable-frequency air cooling unit machine with condensation reheating function

Abstract

The utility model provides a variable-frequency air cooling unit machine with condensation and reheating functions. The variable-frequency air cooling unit machine comprises a refrigerant pipeline system assembly, an air cooling fin type condenser, an electrical maintenance panel and an integrated metal plate base plate. The air cooling fin type condenser and the refrigerant pipeline system assembly are both arranged on the integrated metal plate base plate, the electrical maintenance panel is arranged on the air cooling fin type condenser, and a direct current brushless axial flow fan is arranged on the air cooling fin type condenser. The air supply temperature and humidity control system has the advantages that through precise adjustment of frequency conversion and condensation reheating of the compressor, the input of electric reheating is saved as much as possible while the air supply temperature and humidity are guaranteed, and energy conservation and high efficiency are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of commercial central air-conditioning equipment, in particular to a variable frequency air-cooling unit with a condensing and reheating function. Background Art

[0002] The dehumidification principle of air conditioners currently used in the market is mostly based on condensation dehumidification, which achieves the dehumidification effect by cooling the outdoor air to the dew point temperature of the air so that moisture condenses from the air. The moisture in the air is analyzed to reduce the humidity of the air in the room, achieving the temperature and humidity of the indoor air required by the human body. However, since the air is processed to a very low temperature, it will cause great discomfort to the body if it is directly sent indoors, which requires the air conditioning system to reheat the cooled air. The waste of energy caused by secondary heating is a disadvantage of current air conditioning equipment.

[0003] (1) Waste of energy in taste

[0004] In the process of air conditioning, the sensible heat load is the main part of the entire air conditioning load, accounting for about 60%-80% of the entire air conditioning system. The sensible heat load that occupies most of the entire system can be taken away by a high-temperature cold source, but considering the need for dehumidification, in most centralized air conditioners, since the outdoor air needs to be dehumidified to reach the air supply state point, the temperature is always transferred from the high temperature to the low temperature. Using the condensation mechanism, we can know that the temperature of the cold source must be lower than the condensation temperature of the air we need to process. In this case, due to the existence of the temperature difference, the temperature of the processed air will be further reduced to make its temperature gradually drop to a lower level, thereby precipitating moisture in the air and achieving a dehumidification effect.

[0005] (2) Secondary waste of energy caused by the reheating process

[0006] Traditional air conditioning systems regulate the temperature and humidity of indoor air in a unified manner, and dehumidify while cooling. The ratio of sensible heat to latent heat changes little during the cooling and dehumidification process. However, in daily life, people's upper and lower limits of indoor environment changes are still relatively large. In this case where the demand for large changes in indoor heat and humidity ratio cannot be met, they often choose to reduce the control of indoor humidity. Only by adjusting the indoor temperature to a certain extent to meet people's needs for temperature, it is bound to cause extreme phenomena of too high or too low relative humidity due to only changing the temperature. Due to the sensitivity of the human body to relative humidity, whether the relative humidity is large or small, it will cause human sensory discomfort. In order to reduce the discomfort of the human body, the discomfort of the human body is often balanced by lowering the indoor temperature. In order to adjust the discomfort of the human body and thus lower the temperature, the cooling capacity of the air conditioning system will be increased, resulting in energy waste. If the humidity is controlled at the same time, the air temperature after condensation dehumidification is often too low, and the treated air needs to be heated again, resulting in unnecessary cold and heat offset, which will cause secondary waste of energy utilization, increase the heat load of the entire air conditioning system and cause huge energy waste. Utility Model Content

[0007] In view of this, the utility model aims to propose a variable frequency air cooling unit with a condensing and reheating function to solve the problem of unnecessary cold and heat offset caused by secondary heating of the treated air.

[0008] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0009] A variable frequency air-cooled unit with condensing and reheating function, comprising a refrigerant piping system component, an air-cooled finned condenser, an electrical inspection panel, and an integrated sheet metal chassis;

[0010] The air-cooled finned condenser and refrigerant piping system components are all arranged on an integrated sheet metal chassis, the electrical inspection panel is arranged on the air-cooled finned condenser, and a DC brushless axial flow fan is arranged on the air-cooled finned condenser;

[0011] The refrigerant piping system components include a three-way ball valve, a compressor, an oil separator, a gas-liquid separator, a four-way valve, and a condenser;

[0012] One side of the oil separator is connected to the three-way valve through a pipeline, the three-way valve is connected to the four-way valve through a pipeline, the four-way valve is connected to the condenser through a pipeline, the condenser is connected to the indoor unit assembly through a pipeline, the four-way valve is connected to the gas-liquid separator through a pipeline, the gas-liquid separator is connected to the compressor through a pipeline, the compressor is connected to the oil separator through a pipeline, the four-way valve is connected to the indoor unit assembly through a pipeline, and the three-way valve is connected to the indoor unit assembly through a pipeline.

[0013] Furthermore, the rear of the air-cooled fin-type condenser is connected to the integrated sheet metal chassis through a rear column, and the front of the air-cooled fin-type condenser is respectively provided with a front left column and a front right column connected to the electrical maintenance panel and the mechanical maintenance panel.

[0014] Furthermore, the upper portion of the air-cooled fin-type condenser is connected to the DC brushless axial flow fan through the condenser upper frame;

[0015] The electrical maintenance panel is equipped with a sealed waterproof frequency conversion electric control through the upper beam and the lower beam of the electric control box.

[0016] Furthermore, hoisting holes are opened on both sides of the integrated sheet metal chassis, and the diameter of the hoisting holes is 35mm. This hole is used for on-site hoisting to avoid the situation of sliding left and right when using forklift holes for hoisting, which may cause danger. Rectangular holes are symmetrically arranged on both sides of the integrated sheet metal chassis; the rectangular holes are rectangular holes of 50*230mm, which are used for on-site pipe connection with the internal machine. Due to the symmetry of the openings, the rear chassis crossbeam can be directly connected with the front chassis crossbeam. During on-site pipe connection, pipes can be routed in the front and rear of the unit, which is more conducive to the on-site pipe connection and installation of the unit.

[0017] Furthermore, the bottom of the oil separator is connected to the oil return capillary through a connecting pipe, a first filter is provided on the connecting pipe, and the oil return capillary is arranged on the pipe between the compressor and the gas-liquid separator through the pipe.

[0018] Further, the indoor unit assembly includes a heat recovery coil and an evaporation coil;

[0019] The condenser is connected to the second liquid pipe and the third liquid pipe respectively through the first liquid pipe, the second liquid pipe is connected to the heat recovery coil, and the third liquid pipe is connected to the evaporation coil;

[0020] A one-way valve is arranged on the second liquid pipe, and an electronic expansion valve is arranged on the third liquid pipe.

[0021] Furthermore, the evaporating coil is connected to the four-way valve through an air pipe, a second filter is provided on the air pipe, and the heat recovery coil is connected to the three-way valve through a reheat pipe.

[0022] Furthermore, the first liquid pipe, the gas pipe, and the reheat pipe are all arranged on the integrated sheet metal chassis through an angle valve bracket;

[0023] The angle valve bracket is provided with placement holes corresponding to the first liquid pipe, the gas pipe and the reheat pipe, the angle valve bracket is provided with a rectangular hole, and the bottom bolts of the angle valve bracket are arranged on the integrated sheet metal chassis.

[0024] Compared with the prior art, the variable frequency air cooling unit with condensation and reheating function described in the utility model has the following advantages:

[0025] 1. The variable frequency air-cooled unit machine with condensing and reheating function described in the utility model forms a closed box, which makes the noise generated by the compressor of the unit machine set during the actual high-frequency operation process be surrounded by the inside of the unit machine set, thus greatly reducing the sound pollution caused by the operation of the unit to customers' lives and work.

[0026] 2. The variable frequency air cooling unit with condensation and reheating function described in the utility model, the variable frequency compressor automatically adjusts the operating frequency according to the refrigeration capacity and dehumidification capacity to achieve accurate output of refrigeration and dehumidification;

[0027] 3. The variable frequency air cooling unit with condensing and reheating function described in the utility model can accurately adjust the opening of the reheating three-way valve according to the reheating demand, realize the precise distribution of refrigerant, and discharge the excess heat to the outside.

[0028] 4. The variable frequency air cooling unit with condensation reheating function described in the utility model ensures the temperature and humidity of the air supply while saving the investment in electric reheating as much as possible through precise adjustment of compressor frequency conversion + condensation reheating, which is energy-saving and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the explosion structure of a variable frequency air cooling unit with condensation and reheating function in an embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the structure of a variable frequency air cooling unit with condensation and reheating function in an embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of removing the maintenance panel of a variable frequency air cooling unit with condensing and reheating function in an embodiment of the utility model;

[0033] Figure 4 This is a schematic diagram of the refrigerant pipeline flow direction of a variable frequency air cooling unit with condensation and reheating function in an embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of a refrigerant piping system of a variable frequency air cooling unit with a condensing and reheating function in an embodiment of the utility model;

[0035] Figure 6 This is a schematic diagram of an angle valve bracket of a variable frequency air cooling unit with a condensation reheating function in an embodiment of the utility model;

[0036] Figure 7 It is a schematic diagram of a refrigerant piping system component of a variable frequency air cooling unit with a condensing and reheating function in an embodiment of the utility model.

[0037] Description of reference numerals:

[0038] 1. Refrigerant piping system components; 1-1. Three-way ball valve; 1-2. Angle valve bracket; 1-3. Compressor; 1-4. Oil separator; 1-5. Gas-liquid separator; 1-6. Four-way valve; 1-7. Condenser; 1-8. First liquid pipe; 1-9. Second liquid pipe; 1-10. Third liquid pipe; 1-11. Check valve; 1-12. Electronic expansion valve; 1-13. Gas pipe; 1-14. Second filter; 1-15. Reheat pipe; 1-16 , the first filter; 1-17, oil return capillary; 2, front left column; 3, front right column; 4, rear column; 5, upper crossbeam of electric control box; 6, lower crossbeam of electric control box; 7, sealed waterproof variable frequency electric control box; 8, electrical maintenance panel; 9, mechanical maintenance panel; 10, condenser upper frame; 11, DC brushless axial flow fan; 12, air-cooled finned condenser; 13, integrated sheet metal chassis; 13-1, rectangular hole; 13-2, lifting hole. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] A variable frequency air-cooled unit with condensation and reheating function, comprising a refrigerant piping system component 1, an air-cooled finned condenser 121-7, an electrical inspection panel, and an integrated sheet metal chassis 13; the air-cooled finned condenser 121-7 and the refrigerant piping system component 1 are both arranged on the integrated sheet metal chassis 13, the electrical inspection panel 8 is arranged on the air-cooled finned condenser 121-7, and a DC brushless axial flow fan 11 is arranged on the air-cooled finned condenser 121-7;

[0042] The refrigerant piping system component 1 includes a three-way ball valve 1-1, a compressor 1-3, an oil separator 1-4, a gas-liquid separator 1-5, a four-way valve 1-6, and a condenser 1-7; one side of the oil separator 1-4 is connected to the three-way valve through a pipeline, the three-way valve is connected to the four-way valve 1-6 through a pipeline, the four-way valve 1-6 is connected to the condenser 1-7 through a pipeline, the condenser 1-7 is connected to the indoor unit component through a pipeline, the four-way valve 1-6 is connected to the gas-liquid separator 1-5 through a pipeline, the gas-liquid separator 1-5 is connected to the compressor 1-3 through a pipeline, the compressor 1-3 is connected to the oil separator 1-4 through a pipeline, the four-way valve 1-6 is connected to the indoor unit component through a pipeline, and the three-way valve is connected to the indoor unit component through a pipeline.

[0043] The rear of the air-cooled finned condenser 121-7 is connected to the integrated sheet metal chassis 13 through the rear column 4, and the front of the air-cooled finned condenser 121-7 is respectively provided with a front left column 2 and a front right column 3 connected to the electrical inspection panel 8 and the mechanical inspection panel 9. The upper part of the air-cooled finned condenser 121-7 is connected to the DC brushless axial flow fan 11 through the condenser 1-7 upper frame; the electrical inspection panel 8 is provided with a sealed waterproof variable frequency electric control through the upper crossbeam 5 and the lower crossbeam 6 of the electric control box.

[0044] There are hoisting holes 13-2 on both sides of the integrated sheet metal chassis 13. The diameter of the hoisting holes 13-2 is 35mm. This hole is used for on-site hoisting to avoid the situation of sliding left and right when using forklift holes for hoisting, which causes danger. Rectangular holes 13-1 are symmetrically arranged on both sides of the integrated sheet metal chassis 13; the rectangular holes 13-1 are rectangular holes of 50*230mm, which are used for on-site connection with the internal machine. Due to the symmetry of the openings, the rear chassis crossbeam can be directly connected with the front chassis crossbeam. During on-site connection, the front and rear sides of the unit can be piped, which is more conducive to the connection and installation of the on-site unit. The bottom of the oil separator 1-4 is connected to the oil return capillary 1-17 through a connecting pipe. The connecting pipe is provided with a first filter 1-16. The oil return capillary 1-17 is arranged on the pipe between the compressor 1-3 and the gas-liquid separator 1-5 through a pipe.

[0045] The indoor unit assembly includes a heat recovery coil and an evaporation coil; the condenser 1-7 is connected to the second liquid pipe 1-9 and the third liquid pipe 1-10 respectively through the first liquid pipe, the second liquid pipe 1-9 is connected to the heat recovery coil, and the third liquid pipe 1-10 is connected to the evaporation coil; a one-way valve 1-11 is provided on the second liquid pipe 1-9, and an electronic expansion valve 1-12 is provided on the third liquid pipe 1-10. The evaporation coil is connected to the four-way valve 1-6 through the gas pipe 1-13, and the gas pipe 1-13 is provided with a second filter 1-14, and the heat recovery coil is connected to the three-way valve through the reheat pipe 1-15.

[0046] The first liquid pipe 1-8, the gas pipe 1-13, and the reheat pipe 1-15 are all arranged on the integrated sheet metal chassis 13 through the angle valve bracket 1-2; the angle valve bracket 1-2 is provided with placement holes corresponding to the first liquid pipe 1-8, the gas pipe 1-13, and the reheat pipe 1-15, and the angle valve bracket 1-2 is provided with a rectangular hole 13-1, and the bottom bolts of the angle valve bracket 1-2 are arranged on the integrated sheet metal chassis 13.

[0047] The rectangular hole 13-1 is a rectangle of 165*90mm. In order to prevent the welding flame from burning the angle valve sheet metal when welding the pipeline on site, causing visual dissatisfaction, the 1-2 angle valve bracket 1-2 panel is pasted with reminder signs of the liquid pipe, gas pipe 1-13, and reheat pipe 1-15 to guide the on-site takeover personnel to take over correctly. This reminder sign is particularly applicable in the case of multiple units on site, avoiding many problems caused by wrong takeover.

[0048] like Figure 3 As shown, a variable frequency air cooling unit with condensation reheating function, a sealed waterproof variable frequency electric control box 7 is fixed by an upper cross beam 5 and a lower cross beam 6 of the electric control box, and the upper cross beam 5 and the lower cross beam 6 of the electric control box are fixed to the front left column 2 and the front right column 3, and the structural parts are interlocked by bolt connection.

[0049] like Figure 2 As shown, a variable frequency air-cooled unit machine with a condensing and reheating function, after the electrical inspection panel 8 and the mechanical inspection panel 9 are installed, the unit machine forms a closed box, which makes the noise generated by the compressor of the unit machine set during the actual high-frequency operation process be surrounded by the inside of the unit machine set, thereby greatly reducing the sound pollution caused by the operation of the unit to customers' lives and work.

[0050] like Figure 1 As shown, a variable frequency air cooling unit with condensing and reheating function, the compressor 1-3 is a full DC variable frequency high speed compressor, which can automatically adjust the speed according to the actual needs of the room, and automatically reduce the speed after the room working condition is stable. When the room load demand increases, the speed is increased in time to offset the increase in room load, realizing true on-demand output and effectively controlling the fluctuation of room temperature, so as to provide a more comfortable physical experience.

[0051] like Figure 1 As shown, a variable frequency air-cooled unit with condensation reheat function, the temperature rise of the condensation heat recovery reheat coil can be accurately adjusted according to the target demand, and the reheat temperature rise range is large, ensuring the reheat required for deep dehumidification in cooling and transition seasons.

[0052] like Figure 4 As shown in the figure, a variable frequency air-cooled unit with condensing and reheating function, taking the refrigeration cycle as an example, the arrows in the figure represent the refrigerant cycle. After the refrigerant comes out of the 1-3 compressor, it flows to the oil separator 1-4. After coming out of the oil separator 1-4, it is divided into two directions, one direction is to flow to the four-way valve 1-6, and the other direction is to flow from the outdoor unit to the indoor unit through the reheat pipe 1-15. The gas pipe and liquid pipe of the refrigerant cycle are the same as those of the traditional marked machine.

[0053] like Figure 5As shown, a variable frequency air cooling unit with condensing and reheating function, the three-way ball valve 1-1 is a 4000-step high-precision refrigerant electric three-way valve. It uses a bipolar stepping motor and a multi-stage NGW planetary gear set structure to amplify the motor power to drive the valve stem to rotate the three-way valve core ball to achieve precise distribution and regulation of the refrigerant flow.

[0054] like Figure 5 As shown, a variable frequency air cooling unit with condensing reheating function, the condensing heat recovery pipeline belonging to the electric three-way ball valve 1-1 is led out from the oil separator 1-4, directly introduced into the external pipe and connected to the indoor unit, providing high-temperature refrigerant for the reheat coil, which is used to reheat the low-temperature air treated by the evaporating coil, thereby greatly reducing or even replacing the power consumption of the electric heating belt, thereby achieving the purpose of energy saving.

[0055] The variable frequency air-cooled unit with condensation and reheating function described in this embodiment adopts a full DC variable frequency compressor, a DC brushless axial flow fan, a high-efficiency air-cooled fin-type condenser and a series of integrated control systems. The full variable frequency compressor can automatically adjust the operating frequency according to the cooling capacity and dehumidification capacity. The electric three-way ball valve can accurately adjust the reheating according to the reheating demand to achieve accurate distribution of the refrigerant. The variable frequency air-cooled unit with condensation and reheating function can avoid the situation of cold and heat offset in traditional air conditioners, reduce the power consumption of the unit, and have obvious energy-saving effects.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A variable frequency air cooling unit with condensation and reheating function, characterized in that: It includes a refrigerant piping system component (1), an air-cooled finned condenser (12), an electrical inspection panel (8), and an integrated sheet metal chassis (13); The air-cooled finned condenser (12) and the refrigerant pipeline system component (1) are both arranged on an integrated sheet metal chassis (13), the electrical inspection panel (8) is arranged on the air-cooled finned condenser (12), and the air-cooled finned condenser (12) is provided with a DC brushless axial flow fan (11); The refrigerant piping system component (1) comprises a three-way ball valve (1-1), a compressor (1-3), an oil separator (1-4), a gas-liquid separator (1-5), a four-way valve (1-6), and a condenser (1-7); One side of the oil separator (1-4) is connected to the three-way valve through a pipeline, the three-way valve is connected to the four-way valve (1-6) through a pipeline, the four-way valve (1-6) is connected to the condenser (1-7) through a pipeline, the condenser (1-7) is connected to the indoor unit component through a pipeline, the four-way valve (1-6) is connected to the gas-liquid separator (1-5) through a pipeline, the gas-liquid separator (1-5) is connected to the compressor (1-3) through a pipeline, the compressor (1-3) is connected to the oil separator (1-4) through a pipeline, the four-way valve (1-6) is connected to the indoor unit component through a pipeline, and the three-way valve is connected to the indoor unit component through a pipeline.

2. The variable frequency air cooling unit with condensation and reheating function according to claim 1, characterized in that: The rear of the air-cooled finned condenser (12) is connected to the integrated sheet metal chassis (13) via a rear column (4), and the front of the air-cooled finned condenser (12) is provided with a front left column (2) and a front right column (3) respectively connected to an electrical maintenance panel (8) and a mechanical maintenance panel (9).

3. The variable frequency air cooling unit with condensation and reheating function according to claim 1, characterized in that: The upper part of the air-cooled fin-type condenser (12) is connected to the DC brushless axial flow fan (11) through the upper frame of the condenser (1-7); The electrical inspection panel (8) is provided with a sealed waterproof frequency conversion electric control via an upper crossbeam (5) and a lower crossbeam (6) of the electric control box.

4. The variable frequency air cooling unit with condensation and reheating function according to claim 1, characterized in that: Lifting holes (13-2) are provided on both sides of the integrated sheet metal chassis (13), and rectangular holes (13-1) are symmetrically provided on both sides of the integrated sheet metal chassis (13).

5. The variable frequency air cooling unit with condensation and reheating function according to claim 1, characterized in that: The bottom of the oil separator (1-4) is connected to the oil return capillary (1-17) through a connecting pipe, a first filter (1-16) is provided on the connecting pipe, and the oil return capillary (1-17) is provided on the pipe between the compressor (1-3) and the gas-liquid separator (1-5) through a pipe.

6. The variable frequency air cooling unit with condensation and reheating function according to claim 1, characterized in that: The indoor unit assembly includes a heat recovery coil and an evaporation coil; The condenser (1-7) is connected to the second liquid pipe (1-9) and the third liquid pipe (1-10) respectively through the first liquid pipe, the second liquid pipe (1-9) is connected to the heat recovery coil, and the third liquid pipe (1-10) is connected to the evaporation coil; A one-way valve (1-11) is provided on the second liquid pipe (1-9), and an electronic expansion valve (1-12) is provided on the third liquid pipe (1-10).

7. The variable frequency air cooling unit with condensation and reheating function according to claim 1, characterized in that: The evaporating coil is connected to the four-way valve (1-6) via an air pipe (1-13), a second filter (1-14) is provided on the air pipe (1-13), and the heat recovery coil is connected to the three-way valve via a reheating pipe (1-15).

8. The variable frequency air cooling unit with condensation and reheating function according to claim 1, characterized in that: The first liquid pipe (1-8), the gas pipe (1-13), and the reheat pipe (1-15) are all arranged on the integrated sheet metal chassis (13) through the angle valve bracket (1-2); the angle valve bracket (1-2) is provided with placement holes corresponding to the first liquid pipe (1-8), the gas pipe (1-13), and the reheat pipe (1-15); the angle valve bracket (1-2) is provided with a rectangular hole (13-1); and the bottom bolts of the angle valve bracket (1-2) are arranged on the integrated sheet metal chassis (13).

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