CN221122428U - Air source heat pump water chilling unit - Google Patents

Abstract

The utility model relates to an air source heat pump water chilling unit, which comprises a box body, wherein a fan assembly is arranged at the top of the box body, and a condenser assembly, an electric cabinet, a shell and tube heat exchanger and a refrigerating component are arranged in the box body, and the air source heat pump water chilling unit is characterized in that: the condenser assembly is arranged in the upper space, the electric cabinet, the shell and tube heat exchanger and the refrigerating component are integrally arranged in the lower space, the shell and tube heat exchanger extends along the central line of the length direction of the box and is fixedly arranged on the bottom plate of the box, the refrigerating component is arranged on two sides of the shell and tube heat exchanger, and the electric cabinet is arranged at one end of the shell and tube heat exchanger and is close to the first side plate of the box. The utility model optimizes the structure of the unit, ensures that the internal structure layout is more reasonable, has compact overall structure, reduces the volume of the unit, occupies small space, saves the space of an installation platform, reduces the manufacturing cost of the unit and improves the transportation efficiency.

Description

Air source heat pump water chilling unit

Technical Field

The utility model belongs to the technical field of air source heat pumps, and particularly relates to an air source heat pump water chilling unit.

Background

The low-ambient-temperature air source heat pump water chilling unit is widely applied to places such as office buildings, hotels, factories, schools, residential communities, independent villas and the like for heating in winter and refrigerating in summer due to the characteristics of high efficiency, energy conservation, safety, environmental protection and terminal diversification.

At present, the main stream of the market is a 60HP constant-speed air cooling module air source heat pump water chilling unit, and the occupied area is about 3.2 square meters; the width of the unit is larger than 1200mm, the length of part of the unit is larger than 2300mm, and the following defects exist in the aspects of manufacturing and installation:

(1) The air source heat pump water chiller is generally installed on the ground or the roof of a building, and because of limited installation space, the unit is required to occupy smaller installation platform space while having larger heating/refrigerating capacity, and the 60HP air source heat pump water chiller occupies larger area and cannot meet the requirement on the installation space.

(2) The width of a transport truck for a transport unit is generally 2.3-2.35m, the length of a 60HP air source heat pump water chilling unit is more than 2.3m, the width of the unit is more than 1.15m, the unit is inconvenient to stack during transport, the transport is inconvenient, and the transport efficiency is low.

(3) The unit has larger size, so that the production cost is higher.

(4) The unit bottom plate assembly is low in welding efficiency because of more reinforcing ribs and poor positioning.

Disclosure of utility model

The utility model mainly solves the technical problems of reasonable layout, compact overall structure, small occupied space and low cost, and is favorable for improving the transportation efficiency.

In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:

the utility model provides an air source heat pump cooling water set, includes the box, installs the fan subassembly at the top of box internally mounted of box has condenser assembly, electric cabinet, shell and tube heat exchanger and refrigeration part, two upper and lower spaces about separating into in the box, the condenser assembly is installed in the upper space, electric cabinet, shell and tube heat exchanger and refrigeration part integrated mounting are in the lower floor space, shell and tube heat exchanger extends and fixed mounting on the bottom plate of box along the length direction's of box central line, refrigeration part installs in the both sides of shell and tube heat exchanger, the electric cabinet is installed and is close to the first side board installation of box in the one end of shell and tube heat exchanger.

Further, the refrigerating components comprise two sets of compressors, gas-liquid separators, four-way valves, expansion valves, balance tanks and plate heat exchangers, all the components are connected through pipelines, and the two sets of refrigerating components are symmetrically arranged on two sides of the shell-and-tube heat exchanger.

Further, from the direction of electric cabinet, arrange compressor, gas-liquid separator, cross valve and balance tank in proper order, plate heat exchanger and expansion valve install between gas-liquid separator and balance tank and be located the below of cross valve, shell and tube heat exchanger's inlet tube and outlet pipe port are connected on the box with on the second curb plate of the opposite side of first curb plate.

Further, the condenser assembly comprises two fin heat exchangers and a mounting frame assembly which are obliquely arranged, the two fin heat exchangers are fixedly mounted on the mounting frame assembly, the two fin heat exchangers integrally form an inverted triangle structure, air is taken in from two sides, and air is taken out from the middle top of the two fin heat exchangers.

Further, the mounting bracket assembly comprises a mounting bracket with a straight bottom and triangular sealing plates on two sides, two ends of the mounting bracket are fixedly connected with the box body, the bottoms of the two fin heat exchangers are fixed on the mounting bracket through fasteners, the tops of the two fin heat exchangers are fixed on a mounting frame of a top plate of the box body through fasteners, and the sealing plates are sealed with the mounting bracket, the mounting frame and the tube plates of the fin heat exchangers through fasteners in a sealing connection mode to seal openings at two ends of the two fin heat exchangers.

Further, the installing support is the C-shaped structure of the downward open section, the installing support has two installation inclined planes, two the bottom of fin heat exchanger is installed through the fastener on the installation inclined plane the both sides welding of installing support has two water collector, the water collector welding is being located on the installing support of installation inclined plane below.

Further, the bottom plate of box includes the frame, the frame is formed by four boundary beam welding install many horizontal strengthening ribs and vertical strengthening rib in the frame, welded connection between horizontal strengthening rib, the vertical strengthening rib and the frame the junction of horizontal strengthening rib, vertical strengthening rib and frame is provided with self-align structure, electric cabinet, shell and tube heat exchanger and refrigeration part pass through fastener fixed connection and are in on frame, horizontal strengthening rib and the vertical strengthening rib.

Further, the self-positioning structure comprises a mortice which is concave to one side and a tenon which is convex outwards correspondingly, wherein the mortises are matched with each other, and the tenon is embedded into the mortises to realize self-positioning of the connecting part.

Further, the box includes roof, bottom plate and many stands, and the top and the bottom of many stands pass through fastener and roof and bottom plate fixed connection, fixedly connected with middle crossbeam between two adjacent stands utilizes middle crossbeam is divided into two upper and lower spaces with the box.

Further, the roof comprises "day" font installing frame and two mounting panels, mounting panel and installing frame fixed connection, has opened the condensation wind gap respectively on two mounting panels, the fan subassembly includes axial fan and condensation filter screen, the condensation filter screen is fixed on the mounting panel of condensation wind gap department, axial fan passes through the fastener and installs on the installing frame.

In summary, compared with the prior art, the air source heat pump water chilling unit provided by the utility model has the following advantages:

(1) The utility model optimizes the structure of the unit, ensures that the internal structure layout is more reasonable, has compact overall structure, reduces the volume of the unit, occupies small space, saves the space of an installation platform, and simultaneously reduces the manufacturing cost of the unit.

(2) Due to the small size of the machine set, the machine set can be transversely placed during transportation, and can be longitudinally placed side by side, so that the transportation efficiency is improved.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.

In the drawings:

FIG. 1 is an outline view of the unit of the present utility model;

FIG. 2 is a layout view of the whole structure of the unit of the present utility model;

FIG. 3 is a structural layout of the condenser of the present utility model;

FIG. 4 is a structural layout of a mounting bracket of the present utility model;

FIG. 5 is a structural layout of the refrigeration unit of the present utility model mounted on a base plate;

FIG. 6 is a block diagram of the base plate of the present utility model;

fig. 7 is a partial enlarged view of fig. 6 a.

In the figure:

The box body 10, the upright posts 11, the top plate 12, the mounting frame 121, the mounting plate 122, the bottom plate 13, the frame 131, the transverse reinforcing ribs 132, the longitudinal reinforcing ribs 133, the mortises 134, the tenons 135, the mounting piece 136, the side plates 14, the second side plates 141, the protective screening 15, the middle cross beam 16 and the wiring grooves 17;

A fan assembly 20, a condensation air port 21 and a condensation filter screen 22;

An electric cabinet 30 and a bracket 31;

The heat exchanger comprises a condenser assembly 40, a fin heat exchanger 41, a mounting rack assembly 42, a mounting bracket 421, a mounting inclined surface 4211, a sealing plate 422, a water receiving disc 423 and a drain pipe 424;

A shell and tube heat exchanger 50, a water inlet pipe 51 and a water outlet pipe 52;

The refrigeration unit 60, the compressor 61, the four-way valve 62, the expansion valve 63, the primary expansion valve 63a, the secondary expansion valve 63b, the gas-liquid separator 64, the balance tank 65, the plate heat exchanger 66, and the piping 67.

It should be noted that the drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 and 2, the present utility model provides an air source heat pump water chiller, which comprises a box 10, a fan assembly 20 is installed at the top of the box 10, and an electric cabinet 30, a condenser assembly 40, a shell and tube heat exchanger 50 and a refrigeration component 60 are installed in the box 1. Among them, the refrigeration means includes a compressor 61, a four-way valve 62, an expansion valve 63, a gas-liquid separator 64, a balance tank 65, a plate heat exchanger 66, and the like, and in this embodiment, it is preferable that the expansion valve 63 includes a main expansion valve 63a and a sub expansion valve 63b.

Further, the refrigeration unit 60 includes two independent refrigeration systems, that is, two sets of compressors 61, four-way valves 62, expansion valves 63, gas-liquid separators 64, balancing tanks 65, plate heat exchangers 66, and the like, and the respective components are connected by a pipeline 67. The expansion valves 63 in the two sets of refrigeration components 60 also include a primary expansion valve 63a and a secondary expansion valve 63b, respectively.

In this embodiment, preferably, the box 10 includes a column 11, a top plate 12, a bottom plate 13 and a side plate 14, at least four columns 11 are installed between the top plate 12 and the bottom plate 13, and top ends and bottom ends of the columns 11 are fixedly connected with the top plate 12 and the bottom plate 13 through bolts respectively. An intermediate cross member 16 is fixedly connected between two adjacent columns 11.

In this embodiment, it is further preferable that the interior of the case 10 is divided into an upper space and a lower space, the condenser assembly 40 is installed in the upper space, and the electric cabinet 30, the shell and tube heat exchanger 50 and the refrigerating unit 60 are integrally installed in the lower space. The inner portion of the case 10 is divided into upper and lower spaces by the intermediate beam 16.

The four side plates 14 of the box body 10 are correspondingly divided into an upper part and a lower part, the four side plates 14 corresponding to the upper layer of the condenser assembly 40 are of a protective net 15 structure, and preferably stainless steel nets are adopted, so that the four side plates can be used as air inlets of the condenser assembly 40 and can also play a role in protecting the condenser assembly 40. The lower four-sided plate 14 adopts a stainless steel plate structure for protecting the inside shell and tube heat exchanger 50, the electric cabinet 30 and the refrigerating part 60.

The shell-and-tube heat exchanger 50 extends along the length direction of the case 10 and is mounted on the bottom plate 13 of the case 10 in a horizontal manner, and the bottom of the shell-and-tube heat exchanger 50 is fixed to the bottom plate 13 by a mounting bracket (not shown). The refrigerating units 60 are installed at both sides of the shell and tube heat exchanger 50, and further two sets of refrigerating units 60 are symmetrically arranged at both sides of the shell and tube heat exchanger 50.

In this embodiment, as shown in fig. 2 and 5, the electric cabinet 30 is installed at one end of the shell-and-tube heat exchanger 50 near the first side plate 141 of the cabinet 10, and the first side plate 141 is a detachable steel plate, so as to facilitate daily maintenance and operation of the electric cabinet 30. The bottom of the electric cabinet 30 is fixed on the bottom plate 13 through a bracket 31, and the bracket 31 is fixedly connected with the electric cabinet 30 and the bottom plate 13 through bolts.

The refrigerating unit 60 is provided with a compressor 61, a gas-liquid separator 64, a four-way valve 62 and a balance tank 65 in this order from the direction of the electric cabinet 30, and a plate heat exchanger 66 and an expansion valve 63 are installed between the gas-liquid separator 64 and the balance tank 65 below the four-way valve 62. The pipelines among the components are connected through brazing to form a closed compressor refrigerating system.

As shown in fig. 1, in this embodiment, preferably, ports of the water inlet pipe 51 and the water outlet pipe 52 of the shell-and-tube heat exchanger 50 are connected to the second side plate 141 on the other side of the case 10 opposite to the first side plate 141, so that the water inlet pipe and the water outlet pipe can be conveniently installed and removed.

As shown in fig. 2, the fan assembly 20 is mounted on the top plate 12 of the case 10, and the fan assembly 20 includes two axial fans (not shown), but it is also possible to mount only one axial fan on the case 10 according to need. Two condensing air openings 21 are arranged on the top plate 12, an axial flow fan is arranged at each condensing air opening 21, and a condensing filter screen 22 is arranged on the air outlet side of the axial flow fan.

As shown in fig. 2 and 3, the top plate 12 of the case 10 includes a mounting frame 121 having a "sun" shape, which is advantageous in improving the overall structural strength of the mounting frame 121. Two mounting plates 122 are mounted on the mounting frame 121, the two mounting plates 122 are respectively provided with a condensation air port 21, and the axial flow fan is fixed on the mounting frame 121 through bolts.

In this embodiment, as shown in fig. 2 and 3, the condenser assembly 40 includes two fin heat exchangers 41 and a mounting frame assembly 42 that are obliquely arranged, the two fin heat exchangers 41 are fixedly mounted on the mounting frame assembly 42, the two fin heat exchangers 41 integrally form an inverted triangle structure, two sides are used for air intake, and the fan assembly 20 at the top of the middle of the two fin heat exchangers 41 is used for air outlet to complete the wind field circulation. The inclined arrangement of the fin heat exchanger 41 is advantageous in increasing the heat exchange area of the fin heat exchanger 41.

In this embodiment, it is further preferable that the mounting frame assembly 42 includes a mounting bracket 421 with a straight bottom and triangular sealing plates 422 on both sides, the mounting bracket 421 extends along the length direction of the box 10, two ends of the mounting bracket 421 are fixedly connected with the middle cross beam 16 of the box 10 through bolts, and bottoms of the two fin heat exchangers 41 are fixed on the mounting bracket 421 through bolts. The tops of the two fin heat exchangers 41 are fixed on the mounting frame 121 of the box top plate 12 through bolts, the sealing plate 422 is in sealing connection with the mounting bracket 421, the mounting frame 121 and the tube plates of the fin heat exchangers 41 through bolts, openings at two ends of the two fin heat exchangers 41 are closed, and the wind field flow track of the fin heat exchangers 41 is ensured.

As shown in fig. 4, it is further preferable that the mounting bracket 421 has a C-shaped structure with a downward opening cross section, and the mounting bracket 421 has two mounting slopes 4211, and the bottoms of the two fin heat exchangers 41 are mounted on the two mounting slopes 4211 by bolts. Two water receiving plates 423 are welded on two sides of the mounting bracket 421, and in order to ensure that the condensed water of the fin heat exchanger 41 is collected in the water receiving plates 423, the water receiving plates 423 are welded on the mounting bracket 421 below the mounting inclined plane 4211. Still more preferably, an electric heater (not shown) is installed in the water pan 423 for heating and melting the condensed water after freezing in winter. One to two drain pipes 424 are installed under each of the water receiving trays 423.

As shown in fig. 5, 6 and 7, the base plate 13 is a load bearing member as a main component, and it is necessary to ensure sufficient structural strength and load bearing capacity. In this embodiment, preferably, the bottom plate 13 includes a frame 131, the frame 131 is formed by welding four side beams, a plurality of transverse reinforcement ribs 132 and longitudinal reinforcement ribs 133 are installed in the frame 131, the transverse reinforcement ribs 132, the longitudinal reinforcement ribs 133 and the frame 131 are connected into a whole by welding and used for hoisting and installing main components of a unit, and refrigerating components such as the electric cabinet 30, the shell-and-tube heat exchanger 50 and the compressor 61 are fixedly connected to the frame 131, the transverse reinforcement ribs 132 and the longitudinal reinforcement ribs 133 by fasteners.

When the transverse reinforcing rib 132 and the longitudinal reinforcing rib 133 are welded, in order to facilitate positioning between the transverse reinforcing rib 132 and the longitudinal reinforcing rib 133, for improving welding efficiency, it is further preferable in this embodiment that a self-positioning structure is provided at the welded joint of the transverse reinforcing rib 132, the longitudinal reinforcing rib 133 and the frame 131. The self-positioning structure comprises a mortice 134 which is concave to one side and is matched with the mortice, and a tenon 135 which is correspondingly convex outwards, and the tenon 135 is embedded in the mortice 134 to realize the self-positioning of the joint. The tenon 135 is designed into a semicircular arc shape, so that scratches during operation are prevented.

By adopting the self-positioning structure, compared with the measurement and positioning by using a ruler, the time is saved, and the welding efficiency is improved.

The four corners of the bottom plate 13 are respectively provided with a mounting piece 136, and the mounting piece 136 is of an L-shaped structure and is fixedly connected with four upright posts 11 through bolts, and the top ends of the upright posts 11 are fixedly connected with the four corners of the mounting frame 121 of the top plate 12 through bolts to form a framework of the box body 10.

As shown in fig. 2 and 5, the bottom plate 13 is further provided with a wiring groove 17, the connecting lines between the compressor 61 and the like and the electric cabinet 30 are all arranged along the wiring groove 17, the section of the wiring groove 17 is in a shape of a mouth, a plurality of threading holes are formed in the side wall of the wiring groove 17, and an assembler can reasonably arrange the wiring according to the on-site assembly condition.

The assembly steps of the unit are as follows:

1. The components are first mounted on the base 13 to form a base assembly module.

2. The fin heat exchangers 41 are fixedly connected with the mounting bracket 421 and the sealing plate 422 to form a condenser assembly 41, and then the tops of the two fin heat exchangers 41 of the condenser assembly 40 are fixedly connected with the mounting frame 121 of the top plate 12.

3. The upright 11, to which the intermediate beam 16 has been welded, is fixedly connected to the base 13.

4. The two ends of the mounting bracket 421 are fixedly connected with the middle cross beam 16 by bolts.

5. The tips of the four columns 11 are fixedly connected to the mounting frame 121 of the top plate 12, and an axial flow fan or the like is mounted on the mounting frame 121 and the mounting plate 122.

6. Finally, the side plates 14 and the protection net 15 will be assembled.

The system principle of the unit is as follows:

The water chilling unit comprises a compressor refrigerating system and a water system. The compressor refrigeration loop is composed of main components such as a compressor 61, a fin heat exchanger 41, an expansion valve 63, a shell-and-tube heat exchanger 50 and the like, and is connected through copper pipe brazing to form a closed refrigeration system, wherein the compressor 61 is a fixed-frequency vertical scroll compressor.

Principle of refrigeration: the compressor 61 compresses the low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure superheated gas, the superheated gas flows to the fin heat exchanger 41 from the exhaust port through the four-way valve 62, and the heat is discharged to the outside atmosphere through forced heat exchange between the axial flow fan and the outside air in the fin heat exchanger 41 to become high-pressure liquid refrigerant; then flows to the balance tank 65 through the plate heat exchanger 66, throttles by the main expansion valve 63a to a certain evaporation pressure, flows into the shell-and-tube heat exchanger 50, and exchanges heat with circulating water returned from the user side in the shell-and-tube heat exchanger 50 to reduce the temperature of the circulating water; the refrigerant absorbs the heat of the circulating water to generate phase change, evaporates into low-pressure gas, flows to the gas-liquid separator 64 through the four-way valve 62, and is sucked by the compressor 61 to complete one refrigeration cycle.

Heating principle: the low-temperature low-pressure gaseous refrigerant of the compressor 61 is compressed into high-temperature high-pressure superheated gas, the high-temperature high-pressure superheated gas flows to the shell-and-tube heat exchanger 50 from the exhaust port through the four-way valve 62, and the superheated gas is heated by heat exchange with low-temperature circulating water returned from the user side in the shell-and-tube heat exchanger 50, and phase change is generated after the heat of the refrigerant is released, so that medium-temperature high-pressure liquid is changed; the refrigerant flows through the balance tank 65 and enters the plate heat exchanger 66 to be split into two paths (main path and auxiliary path): the auxiliary path refrigerant exchanges heat with the refrigerant in the plate heat exchanger 66 after being throttled and depressurized by the auxiliary expansion valve 63b, and the auxiliary path refrigerant absorbs heat in the plate heat exchanger 66 and flows to an enthalpy-supplementing port of the compressor 61; the refrigerant in the main path is throttled and depressurized by the main expansion valve 63a through the plate heat exchanger 66 and then flows to the fin heat exchanger 41; the refrigerant is forced to exchange heat with the outside air in the fin heat exchanger 41 by an axial flow fan to absorb the outside heat, the refrigerant liquid is evaporated into low-pressure gas, the low-pressure gas flows through the four-way valve 62 to enter the gas-liquid separator 64, and the low-pressure gas flows through the gas-liquid separator 64 to the air suction port of the compressor 61 to complete a heating cycle.

The air source heat pump water chilling unit provided by the utility model has the following advantages:

(1) The utility model optimizes the structure of the unit, ensures that the structural layout of all internal parts and pipelines is more reasonable, ensures that the whole structure of the unit is more compact, ensures that the external dimension of the 60HP constant-speed air-cooled module heat pump unit reaches the length 2300mm, the width 1140mm and the height 2420mm, has the occupied area of only 2.622 square meters, greatly reduces the volume of the unit, has small occupied space, saves the space of a mounting platform, and simultaneously reduces the manufacturing cost of the unit.

(2) Because the size of the unit is greatly reduced, the unit can be transversely placed during transportation and can also be longitudinally placed side by side, so that the transportation efficiency is greatly improved, and the transportation cost is reduced.

(3) When the utility model is assembled, the bottom plate assembly module and the condenser assembly are preassembled, then the upright posts are fixedly connected with the top plate and the bottom plate, and finally the side plates and the protective net are arranged between the upright posts, thus the assembly of the unit can be completed, and the installation efficiency is high.

(4) The bottom plate of the box body has the advantages that the structure of the side frame, the transverse reinforcing ribs and the longitudinal reinforcing ribs is adopted, so that the overall structural strength of the bottom plate is greatly improved, the bearing capacity of the bottom plate is improved, and meanwhile, the joint of the side frame, the transverse reinforcing ribs and the longitudinal reinforcing ribs adopts a self-positioning structure, so that the welding efficiency of the bottom plate is also greatly improved.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present utility model can be further combined or replaced by equivalent embodiments within the scope of the technical proposal of the present utility model without departing from the scope of the technical proposal of the present utility model.

Claims (10)

1. The utility model provides an air source heat pump cooling water set, includes the box, installs the fan subassembly at the top of box the internally mounted of box has condenser assembly, electric cabinet, shell and tube heat exchanger and refrigeration part, its characterized in that: the condenser assembly is arranged in the upper space, the electric cabinet, the shell and tube heat exchanger and the refrigerating component are integrally arranged in the lower space, the shell and tube heat exchanger extends along the central line of the length direction of the box and is fixedly arranged on the bottom plate of the box, the refrigerating component is arranged on two sides of the shell and tube heat exchanger, and the electric cabinet is arranged at one end of the shell and tube heat exchanger and is close to the first side plate of the box.

2. An air source heat pump chiller according to claim 1 wherein: the refrigerating components comprise two sets of compressors, gas-liquid separators, four-way valves, expansion valves, balance tanks and plate heat exchangers, all the components are connected through pipelines, and the two sets of refrigerating components are symmetrically arranged on two sides of the shell-and-tube heat exchanger.

3. The air source heat pump chiller according to claim 2 wherein: from the direction of electric cabinet, arrange compressor, gas-liquid separator, cross valve and balance tank in proper order, plate heat exchanger and expansion valve install between gas-liquid separator and balance tank and be located the below of cross valve, shell and tube heat exchanger's inlet tube and outlet pipe port connect on the box with on the second curb plate of the opposite side of first curb plate.

4. An air source heat pump chiller according to claim 1 wherein: the condenser assembly comprises two fin heat exchangers and a mounting frame assembly, wherein the two fin heat exchangers are obliquely arranged, the two fin heat exchangers are fixedly mounted on the mounting frame assembly, the two fin heat exchangers integrally form an inverted triangle structure, air is taken in from two sides, and air is taken out from the middle top of the two fin heat exchangers.

5. The air source heat pump chiller according to claim 4 wherein: the installation rack assembly comprises an installation support with a straight bottom and triangular sealing plates on two sides, wherein two ends of the installation support are fixedly connected with the box body, the bottoms of the fin heat exchangers are fixed on the installation support through fasteners, the tops of the fin heat exchangers are fixed on an installation frame of a top plate of the box body through fasteners, and the sealing plates are sealed with the installation support, the installation frame and the tube plates of the fin heat exchangers through fasteners in a sealing mode.

6. The air source heat pump chiller according to claim 5 wherein: the installing support is the C-shaped structure of the section open downwards, the installing support has two installation inclined planes, two the bottom of fin heat exchanger is installed through the fastener on the installation inclined plane the both sides welding of installing support has two water collector, the water collector welding is being located the installing support of installation inclined plane below.

7. An air source heat pump chiller according to claim 1 wherein: the bottom plate of box includes the frame, the frame is formed by four boundary beam welding install many horizontal strengthening ribs and vertical strengthening rib in the frame, welded connection between horizontal strengthening rib, the vertical strengthening rib and the frame the junction of horizontal strengthening rib, vertical strengthening rib and frame is provided with self-align structure, electric cabinet, shell and tube heat exchanger and refrigeration part pass through fastener fixed connection and are in on frame, horizontal strengthening rib and the vertical strengthening rib.

8. The air source heat pump chiller according to claim 7 wherein: the self-positioning structure comprises a mortice which is mutually matched and is concave to one side and a tenon which is correspondingly and outwards protruded, and the tenon is embedded into the mortice to realize self-positioning of the joint.

9. An air source heat pump chiller according to any of claims 1-8 wherein: the box comprises a top plate, a bottom plate and a plurality of upright posts, wherein the top ends and the bottom ends of the upright posts are fixedly connected with the top plate and the bottom plate through fasteners, a middle cross beam is fixedly connected between two adjacent upright posts, and the box is divided into an upper space and a lower space by the middle cross beam.

10. An air source heat pump chiller according to claim 9 wherein: the roof comprises "day" font installing frame and two mounting panels, mounting panel and installing frame fixed connection, open respectively on two mounting panels has the condensation wind gap, the fan subassembly includes axial fan and condensation filter screen, the condensation filter screen is fixed on the mounting panel of condensation wind gap department, axial fan passes through the fastener and installs on the installing frame.