Water source heat pump unit

Abstract

The utility model relates to a water source heat pump unit which comprises a compressor, an evaporator, a condenser and an external oil separator. The discharge end of the compressor is connected with one end of the external oil separator, the other end of the external oil separator is connected with an input port of the condenser, an output port of the condenser is connected with an input port of the evaporator, and an output port of the evaporator is connected with the suction end of the compressor; the number of the compressors and the number of the external oil separators are four, the number of the evaporators and the number of the condensers are two, the number of the external oil separators is four, the number of input ports and the number of output ports of each evaporator and each condenser are two sets, the two evaporators are arranged side by side, the two condensers are arranged side by side, and the compressors are installed above the evaporators. The two compressors are installed above each evaporator, the condenser is installed below the evaporator, and the four external oil separators are divided into two groups to be installed on the two opposite sides of the evaporator and the condenser. The part layout design is compact, and the installation occupied area of a unit is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pump unit technical field especially relates to a water source heat pump unit. BACKGROUND

[0002] As the core component of the refrigeration system, the water chiller not only bears the heavy responsibility of cooling and relieving the summer heat, but also becomes the forefront of energy saving and emission reduction and green development. The falling film water chiller, with its significant advantages of high efficiency, energy saving, environmental protection and stability, is gradually becoming the new favorite of the refrigeration market, leading the industry to a more green and intelligent future. With the continuous growth of global refrigeration demand, especially in the fields of data centers, large commercial buildings, cold chain logistics, etc., the market demand for falling film water chillers is showing explosive growth.

[0003] However, the traditional four-machine-head falling film screw water source heat pump unit often occupies a large amount of horizontal and vertical space due to the need to match large load use requirements, the use of built-in oil separation design, and unreasonable system layout, which undoubtedly puts forward higher requirements for the installation space of subsequent equipment, and is not conducive to the subsequent maintenance work of the whole machine, limiting its further development. If a new layout of four-machine-head high-efficiency falling film screw water source heat pump unit is developed, it can not only save the investment and manufacturing cost of the unit, but also broaden the use range of the unit, and produce great social and economic benefits. SUMMARY

[0004] Therefore, the utility model provides a water source heat pump unit, solves the problem of too large volume and not compact layout of the existing four-machine-head water source heat pump unit.

[0005] The technical scheme of the utility model is as follows: a water source heat pump unit comprises: a compressor, an evaporator, a condenser and an external oil separator.

[0006] One end of the external oil separator connected to the discharge end of the compressor, the other end of the external oil separator connected to the input port of the condenser, the output port of the condenser connected to the input port of the evaporator, the output port of the evaporator connected to the suction end of the compressor.

[0007] The number of the compressor and the external oil separator is four, the number of the evaporator and the condenser is two, and the number of the external oil separator is four, the input port and the output port of each evaporator and condenser are two groups,

[0008] The water inlet and the water outlet of the two evaporators are connected to each other and connected to the water source through the water collecting pipe, and the water inlet and the water outlet of the two condensers are connected to each other and connected to the water source through the water collecting pipe.

[0009] Two said evaporators are arranged side by side, two said condensers are arranged side by side, the compressor is installed above the evaporator, two compressors are installed above each said evaporator, the condenser is installed below the evaporator, and four said external oil separators are installed on the opposite sides of the evaporator and the condenser.

[0010] Further, a throttling element is further included, one end of the throttling element is connected with the output port of the evaporator, the other end of the throttling element is connected with the input port of the condenser, and the throttling element is installed in the gap between the evaporator and the condenser.

[0011] Further, two electric control boxes are further included and are installed on the opposite sides of the evaporator and the condenser respectively, and the external oil separator is installed on the two sides of the electric control box.

[0012] Further, all the compressors, evaporators, condensers and external oil separators are connected with a PLC controller.

[0013] Further, the two said evaporators arranged side by side and the two said condensers arranged side by side are connected through a thickened tube plate, and the thickened tube plate is provided with widened lifting lugs.

[0014] Further, the compressor is a screw compressor.

[0015] Further, the throttling element is an electronic expansion valve.

[0016] Further, the evaporator is a shell-and-tube falling-film evaporator.

[0017] Further, the condenser is a shell-and-tube condenser.

[0018] The utility model discloses the beneficial effects: the utility model discloses the part layout design is compact, guarantees the reasonable unit maintenance space while, reduces the installation area of unit;The layout of external centrifugal oil separator utilizes the longitudinal space of electric control box body, reduces the longitudinal width of system also, can avoid the phenomenon of superhigh of unit when using built-in oil separator, reduces the subsequent installation difficulty;Adopted whole machine hoisting transportation scheme, avoided subsequent field installation inconvenience, thereby promoted the installation efficiency of whole machine. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic diagram of the utility model.

[0020] Figure 2 It is the plan view of the utility model.

[0021] Figure 3 It is the structure connection schematic diagram of the utility model. DETAILED DESCRIPTION

[0022] In order for those skilled in the art to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application, and the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0023] In the embodiments of the present application, Figure 1 and Figure 2 is a structural schematic diagram provided according to the mounting structure of the present application, Figure 3 is a structural connection schematic diagram provided according to the component connection relationship of the present application, as shown in Figure 1 , Figure 2 and Figure 3 , the present application comprises: a compressor 1, an evaporator 2, a condenser 4 and an external oil separator 5;

[0024] One end of the compressor 1 is connected to the external oil separator 5, the other end of the external oil separator 5 is connected to the input port of the condenser 4, the output port of the condenser 4 is connected to the input port of the evaporator 2, and the output port of the evaporator 2 is connected to the suction end of the compressor 1;

[0025] The number of the compressor 1 and the external oil separator 5 is four, the number of the evaporator 2 and the condenser 4 is two, and the number of the external oil separator 5 is four, the input port and the output port of each evaporator 2 and condenser 4 are two groups,

[0026] The water inlet and the water outlet of the two evaporators 2 are connected to each other and connected to the water source through the collecting water pipe, and the water inlet and the water outlet of the two condensers 4 are connected to each other and connected to the water source through the collecting water pipe;

[0027] The two evaporators 2 are arranged side by side, the two condensers 4 are arranged side by side, the compressor 1 is installed above the evaporator 2, two compressors 1 are installed above each evaporator 2, the condenser 4 is installed below the evaporator 2, and the four external oil separators 5 are divided into two groups and installed on the opposite sides of the evaporator 2 and the condenser 4.

[0028] Among them, the compressor 1 is a semi-closed screw compressor. The external oil separator 5 is an external centrifugal high-efficiency oil separator, the throttling element 3 is an electronic expansion valve. The evaporator 2 is a shell and tube falling film evaporator. The condenser 4 is a shell and tube condenser.

[0029] In an embodiment of the utility model, still include throttling element 3, throttling element 3 one end connects the output of evaporator 2, the other end connects the input of condenser 4, throttling element 3 is installed in the gap of evaporator 2 and condenser 4.

[0030] In an embodiment of the utility model, still include electric control box, the electric control box quantity is two and is installed on the opposite two sides of evaporator 2, condenser 4 respectively, the external oil separator 5 is installed on the two sides of electric control box.

[0031] In an embodiment of the utility model, all compressor 1, evaporator 2, condenser 4 and external oil separator 5 are connected with PLC controller. Two sets of water systems and two sets of refrigeration systems are a whole, the water system adopts parallel connection mode to enter and exit water, and each set of refrigeration system has two parallel operation compressors, and the whole heat pump unit is a unit and is controlled by a set of control.

[0032] In an embodiment of the utility model, two evaporators 2 arranged side by side and two condensers 4 arranged side by side are connected by thickening tube plate, and the thickening tube plate is provided with widened lifting lugs.

[0033] The utility model has the advantages that two independent systems are connected by thickening and lug widening tube plate, which can ensure the structural strength of the whole machine, avoid damage to the compressor caused by misoperation during lifting, save the corresponding installation space and water pipe material cost, facilitate centralized control and adjustment of the whole machine system, ensure the oil return effect of the system, reduce the longitudinal space of the unit, and thus broaden the application scenarios of the unit, place the external centrifugal oil separator on the two sides of the electric control box, meet the use requirements, reduce the occupation of the longitudinal space of the unit and the length of the unit pipeline, directly install the whole machine by lifting on site, reduce the subsequent installation time investment, improve the efficiency, the structure of the unit is simple and reasonable, can ensure small space occupancy rate and provide convenience for subsequent maintenance work of logistics personnel, thereby improving the stable operation life of the whole machine.

[0034] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical scheme of the utility model and not to limit it. Although the utility model is described in detail with reference to examples, those skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the utility model technical scheme, which should be covered in the scope of claims of the utility model.

Claims

1. A water source heat pump unit, characterized by, Comprise: Compressor (1), evaporator (2), condenser (4) and external oil separator (5); The discharge end of the compressor (1) is connected to one end of the external oil separator (5), the other end of the external oil separator (5) is connected to the input port of the condenser (4), the output port of the condenser (4) is connected to the input port of the evaporator (2), and the output port of the evaporator (2) is connected to the suction end of the compressor (1); The number of the compressor (1) and external oil separator (5) is four, the number of the evaporator (2) and condenser (4) is two, and the number of the external oil separator (5) is four, the input port and output port of each evaporator (2) and condenser (4) are two groups, The water inlet and outlet of two evaporators (2) are connected to each other and connected to the water source through the collecting pipe, and the water inlet and outlet of two condensers (4) are connected to each other and connected to the water source through the collecting pipe; Two evaporators (2) are arranged side by side, two condensers (4) are arranged side by side, the compressor (1) is installed above the evaporator (2), two compressors (1) are installed above each evaporator (2), the condenser (4) is installed below the evaporator (2), and four external oil separators (5) are installed on the opposite sides of the evaporator (2) and condenser (4).

2. The water source heat pump unit of Claim 1, wherein, It also includes a throttling element (3), one end of which is connected to the output port of the evaporator (2), the other end is connected to the input port of the condenser (4), and the throttling element (3) is installed in the gap between the evaporator (2) and the condenser (4).

3. The water source heat pump unit of claim 1, wherein, It also includes an electric control box, the number of which is two and is installed on the opposite sides of the evaporator (2) and condenser (4), and the external oil separator (5) is installed on both sides of the electric control box.

4. The water source heat pump unit of claim 1, wherein, All the compressors (1), evaporators (2), condensers (4) and external oil separators (5) are connected to the PLC controller.

5. The water source heat pump unit of claim 1, wherein, The two evaporators (2) arranged side by side and the two condensers (4) arranged side by side are connected by thickening pipe plate, and the thickening pipe plate is provided with widened lifting lugs.

6. The water source heat pump unit of claim 1, wherein The compressor (1) is a semi-closed screw compressor.

7. The water source heat pump unit of claim 2, wherein The throttling element (3) is an electronic expansion valve.

8. The water source heat pump unit of claim 1, wherein, The evaporator (2) is a shell and tube falling film evaporator.

9. The water source heat pump unit of claim 1, wherein, The condenser (4) is a shell and tube condenser.

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