Improved double-condensate-water-ring heat pump unit

Abstract

The utility model relates to the technical field of heating, ventilation and air conditioning, in particular to an improved double-condensate-water-loop heat pump unit which comprises a compressor, a water side heat exchanger and a fin type heat exchanger which are sequentially connected end to end to form a first refrigerant loop, and further comprises a fin type condenser. The fin condenser, the compressor and the fin heat exchanger are sequentially connected end to end to form a second refrigerant loop, the first refrigerant loop and the second refrigerant loop are arranged, the water side heat exchanger is adopted in the first refrigerant loop for adjustment, the energy efficiency is high, and adjustment is convenient; when the water side heat exchanger cannot work normally, the fin condenser in the second refrigerant loop replaces the water side heat exchanger to work, so that the water loop heat pump assembly can normally conduct refrigeration / dehumidification, the structure is simple, and the application range of the water loop heat pump assembly is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, ventilation and air conditioning, and in particular to an improved double condensing water ring heat pump unit. Background Art

[0002] At present, a large number of projects in the fields of medicine warehouse, agriculture, breeding, warehouse preservation, etc. use water ring heat pump units.

[0003] refer to Figure 1 The water ring heat pump unit in the prior art includes a compressor 1', one end of the compressor 1' is connected to a four-way valve 2', one end of the four-way valve 2' is connected to a water side heat exchanger 3' (the outside of the water side heat exchanger 3' is usually matched with a cooling tower), the other end of the water side heat exchanger 3' is connected to an expansion valve 4', the other end of the expansion valve 4' is connected to a fin heat exchanger 5', and the other end of the fin heat exchanger 5' is connected to the four-way valve 2'. This system has the advantages of greatly improving energy efficiency, more convenient adjustment, and more flexible system layout compared to conventional air source direct cooling units in summer and transitional seasons; but it has disadvantages: in the water ring heat pump unit in the prior art, the water side heat exchanger 3' needs to be used in conjunction with a cooling tower to achieve cooling or dehumidification functions; when the water side heat exchanger 3' cannot be used (in a place where the external cooling tower cannot be opened, such as when the cooling tower is damaged, or when the water source inside the cooling tower is frozen in winter and cannot be used normally), the water ring heat pump unit will not be able to achieve cooling / dehumidification functions. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an improved double condensing water ring heat pump unit.

[0005] The utility model is realized by the following technical solutions:

[0006] An improved double-condensing water-ring heat pump unit includes a compressor, a water-side heat exchanger and a fin heat exchanger which are connected end to end in sequence to form a first refrigerant circuit, and also includes a fin condenser. The fin condenser is connected end to end with the compressor and the fin heat exchanger to form a second refrigerant circuit.

[0007] As a further improvement of the utility model, the compressor output end is connected to a multi-way valve, and the multi-way valve is used to connect the water side heat exchanger and the fin heat exchanger. The multi-way valve outlet end is provided with a first control device for controlling the connection or closing of the connecting pipeline between the multi-way valve and the water side heat exchanger and / or the fin condenser.

[0008] As a further improvement of the utility model, the first control device includes a first control valve arranged between the multi-way valve and the water-side heat exchanger connecting pipeline, and a second control valve arranged between the multi-way valve and the fin condenser connecting pipeline.

[0009] As a further improvement of the utility model, it also includes an expansion valve, the output end of the water side heat exchanger is connected to the input end / output end of the expansion valve, and the output end of the fin condenser is connected to the output end / input end of the expansion valve;

[0010] The expansion valve input and output ends are both provided with a first connecting pipeline connected to the fin heat exchanger, and the first connecting pipeline is provided with a second control device for controlling the expansion valve input / output end to be connected or closed with the fin heat exchanger.

[0011] As a further improvement of the utility model, the expansion valve is a bidirectional expansion valve.

[0012] As a further improvement of the present invention, a one-way valve is provided on the communication pipeline between the fin condenser and the two-way expansion valve.

[0013] As a further improvement of the present utility model, the multi-way valve is a four-way valve.

[0014] As a further improvement of the utility model, a fan is provided on one side of the fin heat exchanger.

[0015] Beneficial effects of the utility model: In the utility model patent, a first refrigerant circuit and a second refrigerant circuit are provided, wherein a water-side heat exchanger is used for adjustment in the first refrigerant circuit, which has high energy efficiency and convenient adjustment; when the water-side heat exchanger fails to work normally, the fin condenser in the second refrigerant circuit replaces the water-side heat exchanger to work, thereby enabling the water-ring heat pump component to perform cooling / dehumidification normally, with a simple structure and improving the scope of application of the water-ring heat pump component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0017] Figure 1 This is a schematic diagram of the structure of the background technology content of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of an embodiment of the utility model.

[0019] Numbers in the figure: compressor 1, four-way valve 2, water-side heat exchanger 3, expansion valve 4, fin heat exchanger 5, fin condenser 6, fan 7, second control valve 8, first control valve 9, third control valve 10, fourth control valve 11, one-way valve 12. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0021] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0022] refer to Figure 2 , the utility model embodiment discloses:

[0023] An improved double-condensing water-ring heat pump unit includes a compressor 1, a water-side heat exchanger 3 and a fin heat exchanger 5 which are connected end to end in sequence to form a first refrigerant circuit, and also includes a fin condenser 6. The fin condenser 6 is connected end to end with the compressor 1 and the fin heat exchanger 5 in sequence to form a second refrigerant circuit.

[0024] The output end of the compressor 1 is connected to a multi-way valve 2 (the multi-way valve is a four-way valve 2), and the four-way valve 2 is used to connect the water-side heat exchanger 3 and the fin heat exchanger 5. The outlet end of the four-way valve 2 is provided with a first control device to control the connection or closing of the connecting pipeline between the four-way valve 2 and the water-side heat exchanger 3 and / or the fin condenser 6; specifically, the output end of the compressor 1 is connected to the inlet of the four-way valve 2, the input end of the compressor 1 is connected to the low-pressure side interface of the four-way valve 2, and the output end of the fin heat exchanger 5 is connected to the return port of the four-way valve 2, and the outlet of the four-way valve 2 is connected to the water-side heat exchanger 3 and the fin condenser 6 through one inlet and two outlet pipes.

[0025] The first control device includes a first control valve 9 (electronic valve) arranged between the four-way valve 2 and the connecting pipeline of the water side heat exchanger 3, and a second control valve 8 (electronic valve) arranged between the four-way valve 2 and the connecting pipeline of the fin condenser 6; specifically, in the present embodiment, the first control valve 9 and the second control valve 8 are respectively arranged at the two output ends of the one-inlet and two-outlet pipes, and then the water side heat exchanger 3 and the fin condenser are respectively connected through connecting pipes.

[0026] The heat exchanger 3 also includes an expansion valve 4, wherein the output end of the water side heat exchanger 3 is connected to the input end / output end (input end in this embodiment) of the expansion valve 4, and the output end of the fin condenser 6 is connected to the output end / input end (output end in this embodiment) of the expansion valve 4; the input end and the output end of the expansion valve 4 are both provided with a first connecting pipe 13 connected to the fin heat exchanger 5, and the first connecting pipe 13 is provided with a second control device for controlling the connection or closure between the input end / output end of the expansion valve 4 and the fin heat exchanger 5; the expansion valve 4 is a two-way expansion valve 4, that is, in this embodiment, the output end of the expansion valve 4 can also be used as the input end; wherein the second control device includes a third control valve 10 (electronic valve) and a fourth control valve 11 (electronic valve), wherein the third control valve 10 is provided between the output end of the expansion valve 4 and the first connecting pipe 13 of the fin heat exchanger 5, and the fourth control valve 11 is provided between the input end of the expansion valve 4 and the first connecting pipe 13 of the fin heat exchanger 5.

[0027] A one-way valve 12 is provided on the connecting pipeline between the fin condenser 6 and the two-way expansion valve 4; specifically, the one-way valve 12 is provided between the output end of the two-way expansion valve 4 and the output end of the fin condenser 6, wherein the output end of the fin condenser 6 is connected to the inlet of the one-way valve 12 through a connecting pipe, and the outlet of the one-way valve 12 is connected to the expansion valve 4 through a connecting roller.

[0028] In addition, in this embodiment, a fan 7 is provided on one side of the fin heat exchanger 5 .

[0029] Working principle:

[0030] In this embodiment, the first refrigerant circuit is composed of the compressor 1, the four-way valve 2, the water-side heat exchanger 3, the expansion valve 4 and the fin heat exchanger 5. When in use, the first control valve 9 and the third control valve 10 are opened, and the second control valve 8 and the fourth control valve 11 are closed; the second refrigerant circuit is composed of the compressor 1, the four-way valve 2, the fin condenser 6, the expansion valve 4 and the fin heat exchanger 5. When in use, the first control valve 9 and the third control valve 10 are closed, and the second control valve 8 and the fourth control valve 11 are opened.

[0031] When the external cooling tower is operating normally for refrigeration and dehumidification: the first control valve 9 and the third control valve 10 are opened, and the second control valve 8 and the fourth control valve 11 are closed. The compressor 1 inhales the low-temperature liquid in the fin heat exchanger 5, and the liquid in the compressor 1 is heated up to become high-temperature and high-pressure water vapor by doing work. Then the high-temperature and high-pressure water vapor enters the water side heat exchanger 3, and is cooled by the external cooling tower, so that the water vapor releases heat and condenses into low-temperature liquid. Then the low-temperature liquid is discharged from the water side heat exchanger 3 to the expansion valve 4, and the expansion valve 4 throttles it. Then the low-temperature liquid flows into the fin heat exchanger 5 again. At this time, the fan 7 on one side of the fin heat exchanger 5 is turned on, so that the gas in the air passes through the fin heat exchanger 5, so that the temperature of the blown wind can be reduced, that is, the refrigeration function is realized. Then the low-temperature liquid in the fin heat exchanger 5 enters the compressor 1 again, and this cycle is repeated.

[0032] When the external cooling tower cannot operate normally for refrigeration and dehumidification, the second control valve 8 and the fourth control valve 11 are opened, and the first control valve 9 and the third control valve 10 are closed. The compressor 1 inhales the low-temperature liquid in the fin heat exchanger 5, and the liquid in the compressor 1 is heated to become high-temperature and high-pressure water vapor by doing work. Then the high-temperature and high-pressure water vapor enters the fin condenser 6. The fin condenser 6 condenses the high-temperature and high-pressure water vapor into a low-temperature liquid, and then the low-temperature liquid is transported to the fin heat exchanger 5 through the expansion valve 4. Finally, the low-temperature liquid is transported to the fin heat exchanger 5 through the fan 7, so that the gas in the air passes through the fin heat exchanger 5, so that the temperature of the blown wind can be reduced, that is, the refrigeration function is realized. Then the low-temperature liquid in the fin heat exchanger 5 enters the compressor 1 again, and this cycle is repeated.

[0033] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. An improved double condensing water ring heat pump unit, comprising a compressor (1), a water side heat exchanger (3) and a fin heat exchanger (5) connected end to end in sequence to form a first refrigerant circuit, characterized in that: It also includes a fin condenser (6), wherein the fin condenser (6) is connected end to end with the compressor (1) and the fin heat exchanger (5) to form a second refrigerant circuit; It also includes an expansion valve (4), the output end of the water-side heat exchanger (3) is connected to the input end / output end of the expansion valve (4), and the output end of the fin condenser (6) is connected to the output end / input end of the expansion valve (4); The input end and the output end of the expansion valve (4) are both provided with a first communication pipeline (13) connected to the fin heat exchanger (5); the first communication pipeline (13) is provided with a second control device for controlling the input end / output end of the expansion valve (4) to be connected or closed to the fin heat exchanger (5); The expansion valve (4) is a bidirectional expansion valve (4); A one-way valve (12) is provided on the communication pipeline between the fin condenser (6) and the two-way expansion valve (4).

2. The improved double condensing water ring heat pump unit according to claim 1 is characterized in that: The compressor (1) output end is connected to a multi-way valve (2), the multi-way valve (2) is used to connect the water-side heat exchanger (3) and the fin heat exchanger (5), and the multi-way valve (2) outlet end is provided with a first control device for controlling the connection or closing of the connecting pipeline between the multi-way valve (2) and the water-side heat exchanger (3) and / or the fin condenser (6).

3. The improved double condensing water ring heat pump unit according to claim 2 is characterized in that: The first control device comprises a first control valve (9) arranged between the multi-way valve (2) and the connecting pipeline of the water-side heat exchanger (3), and a second control valve (8) arranged between the multi-way valve (2) and the connecting pipeline of the fin condenser (6).

4. The improved double condensing water ring heat pump unit according to claim 2 is characterized in that: The multi-way valve (2) is a four-way valve.

5. The improved double condensing water ring heat pump unit according to claim 1 is characterized in that: A fan (7) is provided on one side of the fin heat exchanger (5).

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