Water loop heat pump unit special for station

Abstract

The utility model discloses a special water loop heat pump unit for a station, which comprises a refrigerant circulating system and a fan assembly, the refrigerant circulating system comprises a compressor, a first heat exchanger, a second heat exchanger and an expansion valve, and the compressor, the first heat exchanger, the second heat exchanger and the expansion valve are connected to form a refrigerating loop. The air outlet assembly comprises an air duct part and a supporting part, the air duct part is provided with an air outlet, the air duct part is movably connected with the supporting part, the air duct part can adjust the air outlet angle of the air outlet relative to the supporting part, and the refrigerating effect and the heating effect of each area can reach the uniform degree.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management, in particular to a water ring heat pump unit dedicated to a workstation. Technical Background

[0002] At present, it is common to place multiple test stations in a workshop. In order to enable the normal operation of the test station, a heat pump unit with both cooling and heating capabilities will be installed in the workshop to ensure that the test station maintains its stable working performance no matter what temperature it is at.

[0003] Patent No. CN107726531B discloses a heat pump fresh air system and its control method, a shell and a heat pump system, an outdoor fresh air introduction system, an indoor air exhaust system and a control system arranged in the shell, wherein the shell is separated into an outdoor fresh air circulation channel and an indoor air exhaust channel by a middle partition with a third air valve, and the outdoor fresh air circulation channel is symmetrically provided with an outdoor fresh air introduction port and a fresh air outlet at two ends, and the indoor air exhaust channel is symmetrically provided with an outdoor air outlet and an indoor exhaust port at two ends; the heat pump fresh air system can realize five working modes: cooling, heating, dehumidification + no heat recovery, dehumidification + partial heat recovery, and dehumidification + full heat recovery to solve the above problems.

[0004] However, in this technical solution, there is still the problem of uneven cooling and heating effects at each test station. If you want to achieve uniform cooling and heating effects at each test station, you must set an air outlet at each angle, which makes the installation of the air outlet complicated. Utility Model Content

[0005] The utility model provides a water ring heat pump unit dedicated to a workstation to ensure uniformity of cooling and heating effects at each test station.

[0006] The utility model is realized through the following technical solutions:

[0007] A water ring heat pump unit dedicated to a workstation includes a refrigerant circulation system and a fan assembly, wherein the refrigerant circulation system includes a compressor, a first heat exchanger, a second heat exchanger and an expansion valve, wherein the compressor, the first heat exchanger, the second heat exchanger and the expansion valve are connected to form a refrigeration circuit, and the air outlet assembly includes an air duct portion and a supporting portion, wherein the air duct portion has an air outlet, wherein the air duct portion is movably connected to the supporting portion, and wherein the air duct portion can adjust the air outlet angle of the air outlet relative to the supporting portion.

[0008] Among them, the air duct part and the support part adopt a movable connection method, among which the specific movable connection methods are various, such as hinge connection, hinge connection, universal joint, etc., and the two can slide. The movable connection between the air duct part and the support part indicates that the two can move relative to each other, so the air duct part can be controlled by manual or electric equipment to rotate a certain angle relative to the support part, and then the direction of the air outlet changes accordingly. After the direction of the air outlet changes, the air outlet angle also changes, so as to ensure that the unit can discharge air to each area, which is conducive to achieving uniform cooling and heating effects in each area; in addition, there is no need to set multiple air outlets with different angles in the chassis, avoiding the complicated installation of air ducts.

[0009] As a preferred embodiment of the utility model, the air duct portion includes a spherical nozzle, the supporting portion includes a ball bracket, the air outlet assembly also includes a pressure ring and a connecting piece, the workstation-specific water ring heat pump unit includes a chassis, the chassis has a channel, at least part of the spherical nozzle is arranged on the ball bracket, the ball bracket is at least partly arranged on the channel, the pressure ring is detachably connected to the channel, and the spherical nozzle is located between the pressure ring and the ball bracket.

[0010] As a preferred embodiment of the present invention, the air outlet component also includes an air outlet fan, which is opposite to the air outlet and is located inside the chassis. Adding an air outlet fan can accelerate the air flow inside the chassis, continuously exchange heat with the second heat exchanger, and turning on the air outlet fan can ensure a certain air volume, further enhancing the cooling capacity or heating capacity.

[0011] As a preferred embodiment of the utility model, the air outlet fan is located between the second heat exchanger and the air duct portion, and the air outlet fan faces the air outlet. Based on the setting position of the air outlet fan, the air supply path can be effectively shortened to achieve more efficient air outlet.

[0012] In summer, the cooling mode of the water ring unit can be turned on, and the temperature around the unit under test can be lowered by blowing cold air, thereby ensuring the normal operation of the heating mode of the unit under test. Similarly, in winter, the heating mode of the water ring unit can be turned on, and the temperature around the unit under test can be raised by blowing hot air, thereby ensuring the normal operation of the cooling mode of the unit under test.

[0013] As a preferred embodiment of the present utility model, the workstation-specific water ring heat pump unit also includes a test bench water system, the test bench water system includes a cooling tower, the first heat exchanger includes a first heat exchange part and a second heat exchange part, the first heat exchange part is configured to exchange heat with the second heat exchange part, the cooling tower is connected to the second heat exchange part, and the first heat exchange part is part of a refrigeration circuit.

[0014] As a preferred embodiment of the present invention, the refrigerant circulation system includes a multi-way valve, the multi-way valve has a first inlet end, a first outlet end, a second outlet end and a second inlet end, the compressor has an exhaust port and an intake port, the exhaust port is connected to the first inlet end, the first outlet end is connected to the first heat exchange part, the second outlet end is connected to the intake port, and the second inlet end is connected to the second heat exchanger. The refrigerant flow in the refrigeration circuit is effectively guided by switching the multi-way valve, and the refrigeration or heating cycle is completed more effectively. In addition, compared with the solenoid valve and the single pipeline, the advantage of the multi-way valve setting is that it can save the number of valve bodies and effectively reduce costs.

[0015] As a preferred embodiment of the present invention, the workstation-specific water ring heat pump unit also includes a water inlet pipe and a water outlet pipe, one end of the water inlet pipe is connected to the second heat exchange part, and the other end thereof is connected to the liquid outlet end of the cooling tower, one end of the water outlet pipe is connected to the second heat exchange part, and the other end thereof is connected to the liquid inlet end of the cooling tower.

[0016] As a preferred embodiment of the utility model, the workstation-specific water ring heat pump unit also includes a first filter and a second filter, and the first filter and the second filter are both arranged in the refrigeration circuit, the first filter is located between the first heat exchanger and the expansion valve, and the second filter is located between the expansion valve and the second heat exchanger, wherein the setting of the first filter effectively filters out impurities in the refrigeration circuit, such as dust, particulate solids, etc., so that the refrigerant remains in a relatively pure state, and the refrigeration life will also be increased, and the setting of the second filter is to perform secondary filtration, which can filter out more impurities for the refrigerant and maintain a higher purity.

[0017] As a preferred embodiment of the utility model, the workstation-specific water ring heat pump unit also includes a high-pressure protection switch, a low-pressure protection switch and a maintenance valve, and the high-pressure protection switch, the low-pressure protection switch and the maintenance valve are arranged in the refrigeration circuit, the high-pressure protection switch is located between the exhaust ports, the low-pressure protection switch is located in the pipeline close to the suction port, and the maintenance valve is located between the high-pressure protection switch and the first inlet end. The high-pressure protection switch can effectively sense whether the high pressure condition at the exhaust port of the compressor is within a normal range. If the pressure at the exhaust port of the compressor is abnormal, the high-pressure protection switch is activated to close the exhaust to protect other equipment in the refrigeration circuit. Similarly, the low-pressure protection switch can effectively sense whether the low pressure condition at the suction port of the compressor is within a normal range. If the pressure at the suction port of the compressor is abnormal, the low-pressure protection switch is activated to close the suction. In addition, the setting of the maintenance valve facilitates subsequent maintenance and inspection of the refrigeration circuit.

[0018] As a preferred embodiment of the present invention, the compressor is selected from a screw compressor, a centrifugal compressor, a piston compressor or a scroll compressor; the first heat exchanger is a condenser, the second heat exchanger is an evaporator, and the expansion valve is an electronic expansion valve or a thermal expansion valve.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. By adopting a movable connection between the air duct part and the support part, the air duct part can be controlled to rotate a certain angle relative to the support part, and then the direction of the air outlet will change accordingly. When the direction of the air outlet changes, the air outlet angle also changes to ensure that the unit can discharge air to each area, which is conducive to achieving uniform cooling and heating effects in each area.

[0021] 2. There is no need to set up multiple air outlets at different angles in the chassis, avoiding the complicated installation of air ducts.

[0022] 3. In summer, the cooling mode of the water ring unit can be turned on, and the temperature around the unit under test can be lowered by blowing cold air, thereby ensuring the normal operation of the heating mode of the unit under test. Similarly, in winter, the heating mode of the water ring unit can be turned on, and the temperature around the unit under test can be increased by blowing hot air, thereby ensuring the normal operation of the cooling mode of the unit under test.

[0023] 4. The air outlet fan is located between the second heat exchanger and the air duct portion, and the air outlet fan faces the air outlet. Based on the setting position of the air outlet fan, the air supply path can be effectively shortened to achieve more efficient air outlet.

[0024] 5. The setting of the first filter effectively filters out impurities in the refrigeration circuit, such as dust, particulate solids, etc., so that the refrigerant remains in a relatively pure state and the refrigeration life will also be increased. The setting of the second filter is to perform secondary filtration, which can filter out more impurities for the refrigerant.

[0025] 6. The high-pressure protection switch and the low-pressure protection switch protect the compressor and other equipment. The setting of the inspection valve facilitates the subsequent maintenance and inspection of the refrigeration circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a system structure diagram of a water ring heat pump unit dedicated to a workstation according to a specific embodiment of the utility model;

[0027] Figure 2 It is a planar structural diagram of the air duct portion and the support portion of a specific embodiment of the utility model.

[0028] 1- air duct part, 2- air outlet fan, 3- expansion valve, 4- first filter, 5- first heat exchanger, 6- multi-way valve, 7- inspection valve, 8- high pressure protection switch, 9- compressor, 10- low pressure protection switch, 11- second heat exchanger, 12- first inlet end, 13- second outlet end, 14- first outlet end, 15- chassis, 16- second filter, 17- water inlet pipe, 18- water outlet pipe, 19- second inlet end, 21- spherical nozzle, 22- connecting piece, 23- pressure ring, 24- channel, 25- support part, 26- air outlet. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the utility model and the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. The utility model is not limited to the embodiments.

[0030] At present, most factory workshops have many workstations, some of which are used to place production and processing equipment, some of which are used to place assembly equipment, and some of which are used for testing experiments. In particular, testing stations need to conduct testing experiments, and the testing experiments need to be completed in some specific environments. The workshop space is empty, and the local ambient temperature cannot be lowered or increased. When the ambient temperature is too high in summer, the heating condition of the unit cannot be tested, and when the ambient temperature is too low in winter, the cooling condition of the unit cannot be tested. Therefore, a large heat pump system will be installed in the workshop to control the temperature inside the workshop. However, most of the heat pump units often have fixed air outlet ducts. In other words, the angle of the air outlet 26 is fixed, resulting in a fixed air outlet direction. Therefore, regardless of cooling or heating, in an empty workshop, the cooling effect and heating effect of each test station are uneven. If you want to achieve uniform cooling and heating effects for each test station, you must set an air outlet 26 at each angle, which makes the installation of the air outlet 26 complicated.

[0031] In order to effectively solve the above problems, this application provides a water ring heat pump unit dedicated to the workstation, please refer to Figure 1The water ring heat pump unit includes a refrigerant circulation system and a fan assembly, wherein the refrigerant circulation system includes a compressor 9, a first heat exchanger 5, a second heat exchanger 11 and an expansion valve 3, wherein the compressor 9, the first heat exchanger 5, the second heat exchanger 11 and the expansion valve 3 are connected to form a refrigeration circuit, and the air outlet assembly includes an air duct portion 1 and a support portion 25, wherein the air duct portion 1 has an air outlet 26, wherein the air duct portion 1 is movably connected to the support portion 25, and wherein the air duct portion 1 can adjust the air outlet angle of the air outlet 26 relative to the support portion 25. In other words, the present application sets the air duct portion 1 and the support portion 25 as an movably connected connection, which means that the two can move relative to each other, so the air duct portion 1 can be controlled by manual or electric equipment to rotate a certain angle relative to the support portion 25, and then the direction of the air outlet 26 also changes accordingly. After the direction of the air outlet 26 changes, the air outlet angle also changes, so as to ensure that the unit can discharge air to each area, which is conducive to achieving uniform cooling and heating effects in each area. ; In addition, there is no need to set a plurality of air outlets 26 at different angles on the chassis 15, thereby avoiding the complicated installation of the air duct, wherein the air duct portion 1 and the support portion 25 are connected in an active manner, wherein the specific active connection methods are various, such as hinge connection, hinge connection, universal shaft, etc., and more preferably, the two can slide. In the present embodiment, the air duct portion 1 adopts a spherical nozzle 21. Specifically, the air duct portion 1 includes a spherical nozzle 21, and the support portion 25 includes a ball bracket. The air outlet assembly also includes a pressure ring 23 and a connector 22. The station-specific water ring heat pump unit includes a chassis 15, and the chassis 15 has a channel 24. At least a portion of the spherical nozzle 21 is arranged on the ball bracket, and the ball bracket is at least partially arranged on the channel 24. The pressure ring 23 is detachably connected to the channel 24, and the spherical nozzle 21 is located between the pressure ring 23 and the ball bracket. The advantage of using the spherical nozzle 21 is that the air can be evenly distributed to each area, thereby achieving air circulation and a comfortable indoor environment. The design of the spherical air outlet can make the wind flow disperse 360 ​​degrees, making the indoor air flow smoother and achieving an excellent air supply effect. In addition, since the outer part of the spherical nozzle 21 is in an arc shape, when it is installed on the ball bracket, it can still maintain a relatively movable connection with the ball bracket, that is, the ball bracket does not limit the movement of the spherical nozzle 21, so the spherical nozzle 21 can still adjust its angle by external force, thereby adjusting the direction of the air outlet 26. In addition, the pressure ring 23 can prevent the spherical nozzle 21 from detaching from the spherical bracket during rotation, thereby avoiding damage to the air outlet 26. In the present application, the pressure ring 23 is connected to the channel 24 in a detachable manner, that is, damaged parts can be replaced, or the air outlet 26 can be disassembled and cleaned in time to maintain high air outlet efficiency. The connecting member 22 in this embodiment adopts bolts or screws. Of course, in some other embodiments, the pressure ring 23 can also be connected to the channel 24 in a snap-on connection, which is easier to install.

[0032] The water ring heat pump unit of the present application can realize that in summer, the cooling mode of the water ring unit can be turned on, and the temperature around the unit under test can be lowered by blowing out cold wind, thereby ensuring the normal operation of the heating mode of the unit under test. Similarly, in winter, the heating mode of the water ring unit can be turned on, and the temperature around the unit under test can be raised by blowing out hot wind, thereby ensuring the normal operation of the cooling mode of the unit under test. The principle is that in the refrigeration cycle system, the compressor 9 is started, and the compressor 9 sucks in a low-temperature and low-pressure gaseous refrigerant, wherein the refrigerant can be Freon, carbon dioxide, etc., and discharges a high-temperature and high-pressure gaseous refrigerant after adiabatic compression. The gaseous refrigerant undergoes a heat exchange in the first heat exchanger 5, and the phase change releases heat to become a medium-temperature and high-pressure liquid refrigerant. The liquid refrigerant becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant after isenthalpic throttling by the expansion valve 3. The refrigerant is After heat exchange with the air, it absorbs or releases heat and becomes a gaseous refrigerant. The gaseous refrigerant returns to the compressor 9 from the air intake port, and the cycle repeats. Therefore, it can be seen that the air will exchange heat with the second heat exchanger 11, and the air discharged through the air outlet 26 can be used as cooling or heating air; wherein, the compressor 9 of the present application is selected from a screw compressor 9, a centrifugal compressor 9, a piston compressor 9 or a scroll compressor 9. The screw compressor 9 squeezes the refrigerant through the screw, so that the refrigerant is discharged from the outside of the compressor 9 casing after the pressure and temperature are increased. The scroll compressor 9 squeezes the refrigerant through the relative movement of the moving scroll and the static scroll, and discharges the refrigerant out of the casing; the first heat exchanger 5 is a condenser, the second heat exchanger 11 is an evaporator, and the second heat exchanger 11 is the expansion valve 3, which is an electronic expansion valve 3 or a thermal expansion valve 3.

[0033] In order to increase the frequency of heat exchange between air and the second heat exchanger 11 and maintain the fluidity of air, in the present application, the air outlet component also includes an air outlet fan 2, and the air outlet fan 2 is opposite to the air outlet 26. The air outlet fan 2 is located inside the chassis 15. Starting the air outlet fan 2 can accelerate the air fluidity inside the chassis 15, continuously exchange heat with the second heat exchanger 11, and turning on the air outlet fan 2 can ensure a certain air output, further enhancing the cooling capacity or heating capacity.

[0034] Furthermore, in the present embodiment, the air outlet fan 2 is located between the second heat exchanger 11 and the air duct portion 1, and the air outlet fan 2 faces the air outlet 26. Based on the setting position of the air outlet fan 2, the air supply path can be effectively shortened to achieve more efficient air outlet. If the air outlet fan 2 is set at a position away from the air outlet 26 and the second heat exchanger 11, the air supply path is increased, resulting in a significant reduction in the air outlet volume and the heating and cooling effects.

[0035] The station-specific water-ring heat pump unit also includes a test bench water system, and the test bench water system includes a cooling tower. The first heat exchanger 5 includes a first heat exchange part and a second heat exchange part. The first heat exchange part is configured to exchange heat with the second heat exchange part. The cooling tower is connected to the second heat exchange part. The first heat exchange part is part of the refrigeration circuit. The high-temperature and high-pressure refrigerant flows into the pipeline of the first heat exchange part and exchanges heat with the coolant (water or ethylene glycol solution) released by the cooling tower or the test bench water source. The high-temperature and high-pressure refrigerant releases heat and transfers heat energy to the coolant. Specifically, the station-specific water-ring heat pump unit also includes a water inlet pipe 17 and a water outlet pipe 18. One end of the water inlet pipe 17 is connected to the second heat exchange part, and the other end is connected to the liquid outlet end of the cooling tower. One end of the water outlet pipe 18 is connected to the second heat exchange part, and the other end is connected to the liquid inlet end of the cooling tower.

[0036] The refrigerant circulation system includes a multi-way valve 6, the multi-way valve 6 has a first inlet end 12, a first outlet end 14, a second outlet end 13 and a second inlet end 19, the compressor 9 has an exhaust port and an air intake port, the exhaust port is connected to the first inlet end 12, the first outlet end 14 is connected to the first heat exchange part, the second outlet end 13 is connected to the air intake port, and the second inlet end 19 is connected to the second heat exchanger 11, wherein the refrigerant flow in the refrigeration circuit is effectively guided by switching the multi-way valve 6, and the refrigerant flow in the refrigeration circuit is more effectively completed. In addition, compared with the solenoid valve and the single pipeline, the advantage of the multi-way valve 6 is that it can save the number of valve bodies and effectively reduce the cost. In addition, by switching the multi-way valve 6, the functions of the first heat exchanger 5 and the second heat exchanger 11 can be interchanged to complete the heating effect of the unit, and the warm air is discharged from the air outlet 26. In addition, in this embodiment, the first heat exchanger 5 is a shell and tube heat exchanger, and the second heat exchanger 11 is a fin heat exchanger. The air enters the gap channel 24 formed by the fins, which can better exchange heat with the heat exchanger.

[0037] The workstation-specific water ring heat pump unit also includes a first filter 4 and a second filter 16, both of which are arranged in the refrigeration circuit, the first filter 4 is located between the first heat exchanger 5 and the expansion valve 3, and the second filter 16 is located between the expansion valve 3 and the second heat exchanger 11, wherein the setting of the first filter 4 effectively filters out impurities in the refrigeration circuit, such as dust, particulate solids, etc., so that the refrigerant remains in a relatively pure state, and the refrigeration life will also be increased, and the setting of the second filter 16 is to perform secondary filtration, which can filter out more impurities for the refrigerant and maintain a higher purity.

[0038] The station-specific water ring heat pump unit also includes a high-pressure protection switch 8, a low-pressure protection switch 10 and a check valve 7. The high-pressure protection switch 8, the low-pressure protection switch 10 and the check valve 7 are arranged in the refrigeration circuit. The high-pressure protection switch 8 is located between the exhaust ports, and the low-pressure protection switch 10 is located in the pipeline close to the suction port. The check valve 7 is located between the high-pressure protection switch 8 and the first inlet end 12. The high-pressure protection switch 8 can effectively sense whether the high pressure condition of the exhaust port of the compressor 9 is within a normal range. If the pressure of the exhaust port of the compressor 9 is abnormal, the high-pressure protection switch 8 is activated to close the exhaust to protect other equipment in the refrigeration circuit. Similarly, the low-pressure protection switch 10 can effectively sense whether the low pressure condition of the suction port of the compressor 9 is within a normal range. If the pressure of the suction port of the compressor 9 is abnormal, the low-pressure protection switch 10 is activated to close the suction. In addition, the setting of the check valve 7 facilitates subsequent maintenance and detection of the refrigeration circuit.

[0039] The above describes in detail the specific embodiments of the utility model. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments in the prior art should be within the scope of protection determined by the claims.

Claims

1. A workstation-specific water ring heat pump unit, comprising a refrigerant circulation system and an air outlet component, wherein the refrigerant circulation system comprises a compressor (9), a first heat exchanger (5), a second heat exchanger (11) and an expansion valve (3), wherein the compressor (9), the first heat exchanger (5), the second heat exchanger (11) and the expansion valve (3) are connected to form a refrigeration circuit, characterized in that: The air outlet assembly comprises an air duct portion (1) and a support portion (25); the air duct portion (1) has an air outlet (26); the air duct portion (1) is movably connected to the support portion (25); and the air duct portion (1) is capable of adjusting an air outlet angle of the air outlet (26) relative to the support portion (25).

2. The station-specific water ring heat pump unit according to claim 1 is characterized in that: The air duct portion (1) comprises a spherical nozzle (21), the support portion (25) comprises a ball bracket, the air outlet assembly further comprises a pressure ring (23) and a connecting piece (22), the station-specific water ring heat pump unit comprises a chassis (15), the chassis (15) has a channel (24), at least part of the spherical nozzle (21) is arranged on the ball bracket, the ball bracket is at least partly arranged on the channel (24), the pressure ring (23) is detachably connected to the channel (24), and the spherical nozzle (21) is located between the pressure ring (23) and the ball bracket.

3. The station-specific water ring heat pump unit according to claim 2 is characterized in that: The air outlet component further comprises an air outlet fan (2), the air outlet fan (2) being opposite to the air outlet (26), and the air outlet fan (2) being located inside the chassis (15).

4. The station-specific water ring heat pump unit according to claim 3 is characterized in that: The air outlet fan (2) is located between the second heat exchanger (11) and the air duct portion (1), and the air outlet fan (2) faces the air outlet (26).

5. The station-specific water ring heat pump unit according to any one of claims 1 to 4, characterized in that: The station-specific water ring heat pump unit also includes a test bench water system, the test bench water system includes a cooling tower, the first heat exchanger (5) includes a first heat exchange part and a second heat exchange part, the first heat exchange part is configured to exchange heat with the second heat exchange part, the cooling tower is connected to the second heat exchange part, and the first heat exchange part is part of a refrigeration circuit.

6. The station-specific water ring heat pump unit according to claim 5, characterized in that: The refrigerant circulation system comprises a multi-way valve (6), the multi-way valve (6) having a first inlet end (12), a first outlet end (14), a second outlet end (13) and a second inlet end (19), the compressor (9) having an exhaust port and an intake port, the exhaust port being connected to the first inlet end (12), the first outlet end (14) being connected to the first heat exchange part, the second outlet end (13) being connected to the intake port, and the second inlet end (19) being connected to the second heat exchanger (11).

7. The station-specific water ring heat pump unit according to claim 5, characterized in that: The station-specific water ring heat pump unit further comprises a water inlet pipe (17) and a water outlet pipe (18), wherein one end of the water inlet pipe (17) is connected to the second heat exchange part, and the other end thereof is connected to the liquid outlet end of the cooling tower, and one end of the water outlet pipe (18) is connected to the second heat exchange part, and the other end thereof is connected to the liquid inlet end of the cooling tower.

8. The station-specific water ring heat pump unit according to any one of claims 1 to 4, characterized in that: The station-specific water ring heat pump unit further comprises a first filter (4) and a second filter (16), wherein the first filter (4) and the second filter (16) are both arranged in the refrigeration circuit, the first filter (4) is located between the first heat exchanger (5) and the expansion valve (3), and the second filter (16) is located between the expansion valve (3) and the second heat exchanger (11).

9. The station-specific water ring heat pump unit according to claim 6, characterized in that: The station-specific water ring heat pump unit further comprises a high-pressure protection switch (8), a low-pressure protection switch (10) and a check valve (7), wherein the high-pressure protection switch (8), the low-pressure protection switch (10) and the check valve (7) are arranged in the refrigeration circuit, the high-pressure protection switch (8) is located between the exhaust ports, the low-pressure protection switch (10) is located in a pipeline close to the air intake port, and the check valve (7) is located between the high-pressure protection switch (8) and the first inlet end (12).

10. The station-specific water ring heat pump unit according to any one of claims 1 to 4, characterized in that: The compressor (9) is selected from a screw compressor (9), a centrifugal compressor (9), a piston compressor (9) or a scroll compressor (9); the first heat exchanger (5) is a shell-and-tube heat exchanger, the second heat exchanger (11) is a fin heat exchanger, and the expansion valve (3) is an electronic expansion valve (3) or a thermal expansion valve (3).

Images