Direct-current driving water source heat pump unit

Abstract

The invention discloses a direct-current driving water source heat pump unit, and belongs to the technical field of heat pump units, the direct-current driving water source heat pump unit comprises a mounting box body and a heat pump unit embedded in the mounting box body, the heat pump unit comprises a four-way valve, a condenser and an evaporator, and the condenser and the evaporator are mounted at the two ends of the four-way valve through conveying pipes; a compressor is arranged between the condenser and the evaporator, a controller is connected to the side wall of the compressor in series, cases are fixedly embedded into the two ends of the mounting box body, fans corresponding to the condenser and the evaporator are fixedly embedded into the two cases respectively, and heat insulation covers are fixedly arranged on the condenser and the evaporator in a sleeving mode. According to the direct-current driving water source (water ring) heat pump unit, a larger compression ratio and ultrahigh refrigeration efficiency can be provided for the compressor, and the overall performance of the direct-current driving unit unit is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of heat pump units, and in particular relates to a direct current driven water source heat pump unit. Background Art

[0002] The chiller consists of four main components: compressor, evaporator, condenser, and some metering devices, which realize different refrigerants through the form of vapor compression refrigeration cycle. Absorption chillers use water as refrigerant and rely on the strong affinity between water and lithium bromide solution to achieve the refrigeration effect. Chillers are generally used in air conditioning units and industrial cooling. In air conditioning systems, chilled water is usually distributed to heat exchangers or coils in air handling units or other types of terminal equipment for cooling in their respective spaces, and then the cooling water is redistributed back to the condenser to be cooled.

[0003] The patent with application number 202440431547.0 discloses a dual-compressor chilled water heat pump unit, which belongs to the field of heat pump units, including a chilled water heat pump unit, a filter plate is threadedly connected to one side of the first fixed plate, a sealing cover is provided at one end of the chilled water heat pump unit and on one side of the filter plate, an annular groove is fixedly connected to the inner wall of the sealing cover, and a cleaning mechanism is provided inside the sealing cover, and the cleaning mechanism includes a servo motor fixedly connected to one side of the outer surface of the sealing cover.

[0004] At present, the above technical solution uses a cold water heat pump unit for refrigeration, which cannot meet the needs of refrigeration and heating in different environments. At the same time, the compressors used in the existing heat pump units are mostly AC powered, and the power supply voltage cannot be adjusted, and the practicability of the compressor is poor. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a DC driven water source heat pump unit. The DC driven water source (water ring) heat pump unit is intended to solve the technical problems that the prior art uses cold water heat pump units for refrigeration, which cannot meet the needs of refrigeration and heating in different environments. At the same time, the compressors used in the existing heat pump units are mostly AC powered, the power supply voltage cannot be adjusted, and the practicality of the compressors is poor.

[0006] In order to solve the above technical problems, the present invention provides a DC-driven water source heat pump unit, which includes an installation box and a heat pump unit embedded in the installation box, the heat pump unit includes a four-way valve and a condenser and an evaporator installed at both ends of the four-way valve through a delivery pipe, a compressor is arranged between the condenser and the evaporator, a controller is connected in series to the side wall of the compressor, both ends of the installation box are embedded and fixed with cabinets, fans corresponding to the condenser and the evaporator are respectively embedded and fixed in the two cabinets, the condenser and the evaporator are both mounted and fixed with heat insulation covers, and a plurality of resistors are arranged in parallel in the controller.

[0007] Preferably, a mounting frame is symmetrically fixed at the center of the outer wall of the mounting box, and a plurality of mounting holes are opened on the mounting frame.

[0008] Furthermore, both ends of the installation box are provided with equipment slots for installing the chassis, and the side walls of the chassis are installed with dustproof nets.

[0009] Furthermore, the four-way valve is respectively connected to a vapor-liquid separator and an oil separator through delivery pipes, a plurality of support seats are provided at the bottom end of the compressor, and both ends of the compressor are respectively connected to the vapor-liquid separator and the oil separator through delivery pipes, wherein a high-pressure switch and a low-pressure switch are respectively provided on the delivery pipes at both ends of the compressor.

[0010] Furthermore, the condenser is connected to a liquid storage tank via a delivery pipe, and the liquid storage tank is connected to a first filter tank via a delivery pipe.

[0011] Furthermore, a second filter tank is provided on the side wall of the first filter tank, and the second filter tube is connected to the evaporator and the first filter tank respectively through a delivery tube.

[0012] Furthermore, the delivery pipes at the top of the evaporator and the condenser are both fixed in the heat insulation cover, and an expansion valve is installed on the delivery pipe between the first filter tube and the second filter tube.

[0013] Furthermore, a plurality of screw holes are provided on the bottom wall of the installation box, a mounting plate is fixed to the bottom ends of the condenser and the evaporator, a connecting portion is provided at the bottom end of the heat insulation cover, and a plurality of through holes are provided on the connecting portion.

[0014] Furthermore, a plurality of positioning holes are formed on the bottom wall of the installation box, and the bottom ends of the gas-liquid separator, the oil separator, the first filter tank, the second filter tank and the liquid storage tank are respectively damped and plugged into the plurality of positioning holes.

[0015] Furthermore, the resistors include 100 ohms, 1K ohms, 10K ohms, 50K ohms and 100K ohms, and the plurality of resistors are respectively connected in series with the compressor via switches.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention integrates a refrigeration / heating control system, an evaporator, a fan, a compressor, a condenser, an expansion valve, a cross-connect, a gas-liquid separator, a liquid storage tank and an oil separator in a mounting box to form an integrated DC-driven water source heat pump unit, which is fixed to an indoor wall using mounting holes on a mounting frame. According to the requirements of different indoor environmental areas, the fan, condenser and evaporator are used separately to cool and heat different spaces.

[0018] By setting a control valve on the compressor, the heat pump unit adopts a compressor driven by a DC motor, and controls the conversion of the DC power supply into a current and voltage suitable for driving the motor. The controller connects different models of sizes in series with the compressor. When the compressor is connected in series with a large resistor, the compressor occupies a smaller voltage. When the compressor is connected in series with a small resistor, the compressor occupies a larger voltage. The voltage and current of the compressor are adjusted by adjusting resistors of different values. During the conversion process, the speed and torque of the motor are controlled by adjusting the size and direction of the input current, thereby achieving precise control of the motor. The DC motor drive of the DC drive compressor can achieve an ultra-high speed, which can provide the compressor with a larger compression ratio and ultra-high refrigeration efficiency, and improve the overall performance of the DC drive unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is the overall environment diagram of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the heat pump unit in the present invention;

[0023] Figure 4 It is a schematic structural diagram of the heat pump unit in another angle of the present invention;

[0024] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at center A;

[0025] Figure 6 It is a cross-sectional structural schematic diagram of the installation box in the present invention;

[0026] Figure 7 It is a cross-sectional structural schematic diagram of the compressor in the present invention;

[0027] Figure 8 Schematic diagram of the internal structure of the controller in the present invention.

[0028] The markings in the attached drawings are: 1. Installation box; 2. Installation frame; 3. Chassis; 4. Installation hole; 5. Vapor-liquid separator; 6. Condenser; 7. Liquid storage tank; 8. Oil separator; 9. Delivery pipe; 10. First filter tank; 11. Expansion valve; 12. Second filter tank; 13. Heat insulation cover; 14. Four-way valve; 15. Evaporator; 16. Support seat; 17. Compressor; 18. Connection part; 19. Through hole; 20. Installation plate; 21. Equipment slot; 22. Dust net; 23. Fan; 24. Screw hole; 25. Positioning hole; 26. Controller; 27. Resistor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] This specific implementation method is a DC driven water source heat pump unit, and its structural schematic diagram is as follows Figure 2-Figure 5 As shown, the DC driven water source heat pump unit includes a mounting box 1 and a heat pump unit embedded in the mounting box 1, the heat pump unit includes a four-way valve 14 and a condenser 6 and an evaporator 15 installed at both ends of the four-way valve 14 through a delivery pipe 9, a compressor 17 is arranged between the condenser 6 and the evaporator 15, and a controller 26 is connected in series to the side wall of the compressor 17, both ends of the mounting box 1 are embedded and fixed with a cabinet 3, and fans 23 corresponding to the condenser 6 and the evaporator 15 are respectively embedded and fixed in the two cabinets 3, and a heat insulation cover 13 is fixed on the condenser 6 and the evaporator 15, and a plurality of resistors 27 are arranged in parallel in the controller 26.

[0031] A mounting frame 2 is symmetrically fixed at the center of the outer wall of the mounting box 1, and a plurality of mounting holes 4 are provided on the mounting frame 2. Equipment slots 21 for mounting the chassis 3 are provided at both ends of the mounting box 1. A dust screen 22 is installed on the side wall of the chassis 3. The four-way valve 14 is respectively connected to the vapor-liquid separator 5 and the oil separator 8 through the delivery pipe 9. A plurality of support seats 16 are provided at the bottom end of the compressor 17, and the two ends of the compressor 17 are respectively connected to the vapor-liquid separator 5 and the oil separator 8 through the delivery pipe 9. The compressor 1 The delivery pipes 9 at both ends of 7 are respectively provided with a high-pressure switch and a low-pressure switch. The evaporator 15, the fan 23, the compressor 17, the condenser 6, the expansion valve 11, the cross-connection, the gas-liquid separator, the liquid storage tank 7 and the oil separator 8 are integrated in the installation box 1 to form an integral DC-driven water source heat pump unit, which is fixed to the indoor wall using the mounting holes 4 on the mounting frame 2. According to the requirements of different indoor environmental areas, the fan 23, the condenser 6 and the evaporator 15 are used separately to cool and heat different spaces.

[0032] The condenser 6 is connected to a liquid storage tank 7 through a delivery pipe 9, and the liquid storage tank 7 is connected to a first filter tank 10 through the delivery pipe 9. A second filter tank 12 is arranged on the side wall of the first filter tank 10, and the second filter tube is respectively connected to the evaporator 15 and the first filter tank 10 through the delivery pipe 9. The delivery pipe 9 at the top of the evaporator 15 and the condenser 6 is fixed in the heat insulation cover 13, and an expansion valve 11 is installed on the delivery pipe 9 between the first filter tube and the second filter tube. A plurality of screw holes 24 are provided on the bottom wall of the mounting box 1, and a mounting plate 20 is fixed to the bottom ends of the condenser 6 and the evaporator 15. A connecting portion 18 is provided at the bottom end of the heat insulation cover 13, and a plurality of through holes 19 are provided on the connecting portion 18. A plurality of positioning holes 25 are provided on the bottom wall of the mounting box 1, and the bottom ends of the vapor-liquid separator 5, the oil separator 8, the first filter tank 10, the second filter tank 12 and the liquid storage tank 7 are respectively damped and plugged into the plurality of positioning holes 25.

[0033] like Figure 6 and Figure 7As shown, the resistor 27 includes 100 ohms, 1K ohms, 10K ohms, 50K ohms and 100K ohms, and multiple resistors 27 are respectively connected in series with the compressor 17 through switches. The heat pump unit adopts a compressor 17 driven by a DC motor, and controls the conversion of the DC power supply into a current and voltage suitable for driving the motor. The controller 26 connects different models of sizes in series with the compressor 17. When the compressor 17 is connected in series with a large resistor, the compressor 17 occupies a smaller voltage. When the compressor 17 is connected in series with a small resistor, the compressor 17 occupies a larger voltage. The voltage and current of the compressor 17 are adjusted by adjusting resistors of different values. During the conversion process, the speed and torque of the motor are controlled by adjusting the size and direction of the input current, thereby achieving precise control of the motor. The DC motor drive of the DC drive compressor 17 can achieve an ultra-high speed, and can provide the compressor 17 with a larger compression ratio and ultra-high refrigeration efficiency, thereby improving the overall performance of the DC drive unit.

[0034] The structural diagram of the DC driven water source (water ring) heat pump unit is as follows: Figure 3 As shown, another structural diagram of the heat pump unit is as follows Figure 4 As shown, its Figure 4 The enlarged schematic diagram of the structure at A is shown in Figure 5 As shown, the cross-sectional structure diagram of the installation box 1 is as shown Figure 6 As shown, the cross-sectional structural diagram of the compressor 17 is as shown Figure 7 As shown, the internal structure diagram of the controller 26 is as follows Figure 8 shown.

[0035] Working principle: When the device of the present technical solution is used, the low-temperature and low-pressure refrigerant vapor is sucked into the oil-free compressor 17. After the mechanical action of the compressor 17, the volume is sharply compressed and then becomes the high-temperature and high-pressure refrigerant vapor. The high-temperature and high-pressure refrigerant vapor is guided to the condenser 6, where it exchanges heat with the cooling water from the cooling water circulation system. After the condensation process, the high-pressure liquid refrigerant is throttled by the throttling device expansion valve 11. During the throttling process, the pressure of the refrigerant decreases sharply, causing its boiling point to decrease accordingly. The low-pressure and low-temperature refrigerant gas-liquid mixture enters the evaporator 15, where it exchanges heat with the chilled water from the chilled water circulation system, and controls the conversion of the DC power supply into a suitable driving motor. The controller 26 connects different sizes of compressors 17 in series. When the compressor 17 is connected in series with a resistor of a large value, the compressor 17 occupies a smaller voltage. When the compressor 17 is connected in series with a resistor of a small value, the compressor 17 occupies a larger voltage. The voltage and current of the compressor 17 are adjusted by adjusting resistors of different values. During the conversion process, the speed and torque of the motor are controlled by adjusting the size and direction of the input current, thereby achieving precise control of the motor. The DC motor drive of the DC drive compressor 17 can achieve an ultra-high speed, provide a larger compression ratio and ultra-high refrigeration efficiency for the compressor 17, and improve the overall performance of the DC drive unit.

[0036] All technical features in this embodiment can be freely combined according to actual needs.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. 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 DC driven water source heat pump unit, comprising a vapor-liquid separator (5), a condenser (6), a liquid storage tank (7), an oil separator (8), an expansion valve (911), a four-way valve (14), an evaporator (15), and a compressor (16), the DC driven water source heat pump unit comprising a mounting box (1) and a heat pump unit embedded in the mounting box (1), characterized in that: The heat pump unit comprises a four-way valve (14) and a condenser (6) and an evaporator (15) mounted at both ends of the four-way valve (14) via a delivery pipe (9); a compressor (17) is arranged between the condenser (6) and the evaporator (15); a controller (26) is connected in series to the side wall of the compressor (17); boxes (3) are embedded and fixed at both ends of the installation box (1); fans (23) corresponding to the condenser (6) and the evaporator (15) are embedded and fixed in the two boxes (3), respectively; a heat insulation cover (13) is mounted and fixed on the condenser (6) and the evaporator (15); and a plurality of resistors (27) are arranged in parallel in the controller (26).

2. A DC driven water source heat pump unit according to claim 1, characterized in that: A mounting frame (2) is symmetrically fixed at the center of the outer wall of the mounting box (1), and a plurality of mounting holes (4) are provided on the mounting frame (2).

3. A DC driven water source heat pump unit according to claim 2, characterized in that: Both ends of the installation box (1) are provided with equipment slots (21) for installing the chassis (3), and the side walls of the chassis (3) are provided with dustproof nets (22).

4. A DC driven water source heat pump unit according to claim 1, characterized in that: The four-way valve (14) is connected to a vapor-liquid separator (5) and an oil separator (8) via a delivery pipe (9), a plurality of support seats (16) are provided at the bottom end of the compressor (17), and both ends of the compressor (17) are connected to the vapor-liquid separator (5) and the oil separator (8) via a delivery pipe (9), wherein a high-pressure switch and a low-pressure switch are provided on the delivery pipes (9) at both ends of the compressor (17).

5. A DC driven water source heat pump unit according to claim 4, characterized in that: The condenser (6) is connected to a liquid storage tank (7) via a delivery pipe (9), and the liquid storage tank (7) is connected to a first filter tank (10) via a delivery pipe (9).

6. A DC driven water source heat pump unit according to claim 5, characterized in that: A second filter tank (12) is provided on the side wall of the first filter tank (10), and the second filter tube is connected to the evaporator (15) and the first filter tank (10) respectively through a delivery tube (9).

7. A DC driven water source heat pump unit according to claim 6, characterized in that: The delivery pipes (9) at the top ends of the evaporator (15) and the condenser (6) are both fixed in the heat insulation cover (13), and an expansion valve (11) is installed on the delivery pipe (9) between the first filter tube and the second filter tube.

8. A DC driven water source heat pump unit according to claim 7, characterized in that: The bottom wall of the installation box (1) is provided with a plurality of screw holes (24); the bottom ends of the condenser (6) and the evaporator (15) are fixed with a mounting plate (20); the bottom end of the heat insulation cover (13) is provided with a connecting portion (18); and the connecting portion (18) is provided with a plurality of through holes (19).

9. A DC driven water source heat pump unit according to claim 8, characterized in that: The bottom wall of the installation box (1) is provided with a plurality of positioning holes (25), and the bottom ends of the gas-liquid separator (5), the oil separator (8), the first filter tank (10), the second filter tank (12) and the liquid storage tank (7) are respectively damped and plugged into the plurality of positioning holes (25).

10. A DC driven water source heat pump unit according to claim 1, characterized in that: The resistors (27) include 100 ohms, 1K ohms, 10K ohms, 50K ohms and 100K ohms, and the plurality of resistors (27) are respectively connected in series with the compressor (17) through switches.

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