Heat pump system and air conditioner having the same

Abstract

The present invention provides a heat pump system and an air conditioner having the same. The heat pump system includes: a compressor unit having a compression chamber for compressing a refrigerant; a first heat exchanger, an outlet end of the compression chamber is communicated with an inlet end of the first heat exchanger, and an outlet end of the first heat exchanger is communicated with an inlet end of the compression chamber; a first pipeline, a first port of the first pipeline is communicated with the first heat exchanger, and a second port of the first pipeline is communicated with the compression chamber; a second heat exchanger disposed on the first pipeline, so that when the heat pump system is in a refrigeration mode, the refrigerant flows into the compression chamber after sequentially passing through the first heat exchanger and the second heat exchanger, to solve the problem of low utilization rate of the refrigerant in the heat pump system in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning heat pumps, and in particular to a heat pump system and an air conditioner having the same. Background Art

[0002] In recent years, with the intensification of environmental pollution and the depletion of energy, countries around the world have increasingly stringent requirements for building energy conservation, and the energy-saving effect of heat pump air conditioning equipment is crucial.

[0003] At present, high-efficiency and energy-saving heat pump air-conditioning equipment is gradually being introduced on the market, and many high-efficiency and energy-saving technical means have also appeared one after another, such as (independent temperature and humidity control technology and low-temperature air replenishment enthalpy increase technology) to achieve the goal of air-conditioning regulation.

[0004] Although the existing heat pump air conditioner can realize cooling mode and heating mode, it is unable to control the dual evaporation temperature of the refrigerant, resulting in a large amount of refrigerant being unable to realize its own function, reducing the utilization rate of the refrigerant and failing to achieve the purpose of efficient energy saving. Summary of the invention

[0005] The main purpose of the present invention is to provide a heat pump system and an air conditioner having the same, so as to solve the problem of low refrigerant utilization rate in the heat pump system in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a heat pump system is provided, comprising: a compressor unit, the compressor unit having a compression chamber for compressing a refrigerant; a first heat exchanger, the outlet end of the compression chamber is connected to the inlet end of the first heat exchanger, and the outlet end of the first heat exchanger is connected to the inlet end of the compression chamber; a first pipeline, the first port of the first pipeline is connected to the first heat exchanger, and the second port of the first pipeline is connected to the compression chamber; a second heat exchanger, the second heat exchanger is arranged on the first pipeline, so that when the heat pump system is in a cooling mode, the refrigerant passes through the first heat exchanger and the second heat exchanger in sequence and then flows into the compression chamber.

[0007] Furthermore, the first pipeline includes: a first branch; a second branch, the first branch and the second branch are arranged in parallel, and the second heat exchanger is arranged on the second branch, so that when the heat pump system is in heating mode, the refrigerant flows through the first heat exchanger and the first branch in sequence and then flows into the compression chamber.

[0008] Furthermore, the heat pump system further includes: a first control valve, which is arranged on the first branch to control the on-off of the first branch through the first control valve.

[0009] Furthermore, the heat pump system further includes: a second control valve, which is arranged on the second branch to control the on-off of the second branch through the second control valve.

[0010] Further, the heat pump system further includes: a second pipeline, a first port of the second pipeline communicates with the compression chamber, and a second port of the second pipeline communicates with a first opening of the first heat exchanger; a first expansion valve, the first expansion valve is arranged on the second pipeline.

[0011] Further, the heat pump system further includes: a third heat exchanger, the third heat exchanger is arranged on the second pipeline, a first port of the third heat exchanger communicates with the compression chamber, and a second port of the third heat exchanger communicates with the first expansion valve.

[0012] Further, the heat pump system further includes: a third pipeline, a first port of the third pipeline communicates with the compression chamber, and a second port of the third pipeline communicates with a second opening of the first heat exchanger; a second expansion valve, the second expansion valve is arranged on the third pipeline.

[0013] Further, the heat pump system further includes: a fourth heat exchanger, the fourth heat exchanger is arranged on the third pipeline, a first port of the fourth heat exchanger communicates with the compression chamber, and a second port of the fourth heat exchanger communicates with the second expansion valve.

[0014] Further, the heat pump system further includes: a third branch, a first port of the third branch communicates with the second pipeline, a second port of the third branch communicates with the third pipeline, the first port of the third branch is located on a side of the first expansion valve close to the compression chamber, and the second port of the third branch is located on a side of the second expansion valve close to the compression chamber; a third control valve, the third control valve is arranged on the third branch to control the on-off of the third branch through the third control valve.

[0015] Further, the heat pump system further includes: a fourth control valve, the third pipeline includes: a fourth branch; a fifth branch, the fourth branch and the fifth branch are arranged in parallel, the third branch communicates with the fifth branch, and both the second expansion valve and the fourth control valve are arranged on the fifth branch to control the on-off of the fifth branch through the fourth control valve.

[0016] Further, there is a communication pipe section between the fourth control valve and the second expansion valve, the third branch communicates with the communication pipe section, and the second expansion valve is located on a side of the fourth control valve close to the first heat exchanger.

[0017] According to another aspect of the present invention, there is provided an air conditioner, including a heat pump system, and the heat pump system is the above-mentioned heat pump system.

[0018] Applying the technical solution of the present invention, the heat pump system includes a compressor unit, a first heat exchanger, a first pipeline, and a second heat exchanger. Among them, the compressor unit has a compression chamber for compressing the refrigerant. The outlet end of the compression chamber is communicated with the inlet end of the first heat exchanger, and the outlet end of the first heat exchanger is communicated with the inlet end of the compression chamber; the first port of the first pipeline is communicated with the first heat exchanger, and the second port of the first pipeline is communicated with the compression chamber; the second heat exchanger is arranged on the first pipeline so that when the heat pump system is in the refrigeration mode, the refrigerant flows into the compression chamber after passing through the first heat exchanger and the second heat exchanger in sequence. Such an arrangement can realize the first temperature adjustment of the refrigerant in the first heat exchanger and then the second temperature adjustment in the second heat exchanger, so as to maximize the utilization rate of the refrigerant, improve the working efficiency of the heat pump system, and achieve the purpose of high efficiency and energy saving of the heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 shows a schematic diagram of the refrigeration mode of the heat pump system according to the present invention; and

[0021] Figure 2 shows a schematic diagram of the heating mode of the heat pump system according to the present invention.

[0022] Among them, the above-mentioned drawings include the following reference numerals:

[0023] 1. Compressor unit; 2. First heat exchanger; 3. Second heat exchanger; 10. First pipeline; 11. First branch; 4. First control valve; 5. Second control valve; 20. Second pipeline; 21. First expansion valve; 30. Third pipeline; 31. Second expansion valve; 12. Second branch; 6. Third control valve; 13. Third branch; 14. Fourth branch; 15. Fifth branch; 7. Fourth control valve; 8. Third heat exchanger; 9. Fourth heat exchanger; 110. First converging branch; 111. Second converging branch; 101. Primary compression chamber; 102. Secondary compression chamber; 103. Four-way valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] The present invention provides a heat pump system. Please refer to Figure 1 and Figure 2, including: a compressor unit 1 having a compression chamber for compressing a refrigerant; a first heat exchanger 2, the outlet end of the compression chamber being in communication with the inlet end of the first heat exchanger 2, and the outlet end of the first heat exchanger 2 being in communication with the inlet end of the compression chamber; a first pipeline 10, the first port of the first pipeline 10 being in communication with the first heat exchanger 2, and the second port of the first pipeline 10 being in communication with the compression chamber; a second heat exchanger 3, the second heat exchanger 3 being disposed on the first pipeline 10 such that when the heat pump system is in the refrigeration mode, the refrigerant flows into the compression chamber after sequentially passing through the first heat exchanger 2 and the second heat exchanger 3.

[0026] The heat pump system provided by the present invention includes a compressor unit 1, a first heat exchanger 2, a first pipeline 10, and a second heat exchanger 3. Among them, the compressor unit 1 has a compression chamber for compressing a refrigerant. The outlet end of the compression chamber is in communication with the inlet end of the first heat exchanger 2, and the outlet end of the first heat exchanger 2 is in communication with the inlet end of the compression chamber; the first port of the first pipeline 10 is in communication with the first heat exchanger 2, and the second port of the first pipeline 10 is in communication with the compression chamber; the second heat exchanger 3 is disposed on the first pipeline 10 such that when the heat pump system is in the refrigeration mode, the refrigerant flows into the compression chamber after sequentially passing through the first heat exchanger 2 and the second heat exchanger 3. Such an arrangement can achieve the first temperature adjustment of the refrigerant in the first heat exchanger 2, and then achieve the second temperature adjustment in the second heat exchanger 3, so as to maximize the utilization rate of the refrigerant, improve the working efficiency of the heat pump system, and achieve the purpose of high efficiency and energy saving of the heat pump system.

[0027] Specifically, the first pipeline 10 includes: a first branch 11; a second branch 12, the first branch 11 and the second branch 12 being arranged in parallel, and the second heat exchanger 3 being disposed on the second branch 12 such that when the heat pump system is in the heating mode, the refrigerant flows into the compression chamber after sequentially flowing through the first heat exchanger 2 and the first branch 11. Such an arrangement enables the heat pump system in the present invention to achieve the function design of dual evaporation temperatures on the premise of being able to implement the refrigeration mode and the heating mode.

[0028] In the embodiment provided by the present invention, the heat pump system further includes: a first control valve 4, the first control valve 4 being disposed on the first branch 11 to control the on-off of the first branch 11 through the first control valve 4.

[0029] The heat pump system further includes: a second control valve 5, the second control valve 5 being disposed on the second branch 12 to control the on-off of the second branch 12 through the second control valve 5.

[0030] In the process of specific implementation, when the heat pump system is in the refrigeration mode, the first control valve 4 is closed and the second control valve 5 is opened. The refrigerant is sucked into the low-pressure chamber of the compression chamber through the first heat exchanger 2 to achieve a low evaporation temperature. When the heat pump system is in the heating mode, the first control valve 4 is opened and the second control valve 5 is closed. After the refrigerant evaporates and absorbs heat in the first heat exchanger 2 to become a medium-temperature gaseous refrigerant, it is sucked into the low-pressure chamber of the compressor. Preferably, the first pipeline 10 further includes: a first confluence branch 110, and the first ports of the first branch 11 and the second branch 12 are communicated with the first heat exchanger 2 through the first confluence branch 110; a second confluence branch 111, and the second ports of the first branch 11 and the second branch 12 are communicated with the compression chamber through the second confluence branch 111.

[0031] In the embodiment provided by the present invention, the heat pump system further includes: a second pipeline 20, the first port of the second pipeline 20 is communicated with the compression chamber, and the second port of the second pipeline 20 is communicated with the first opening of the first heat exchanger 2; a first expansion valve 21, and the first expansion valve 21 is arranged on the second pipeline 20. By arranging the first expansion valve 21 on the second pipeline 20, the refrigerant is throttled and depressurized after flowing through the first expansion valve 21 to achieve a medium evaporation temperature.

[0032] In order to further improve the utilization rate of the refrigerant, the heat pump system further includes: a third heat exchanger 8, the third heat exchanger 8 is arranged on the second pipeline 20, the first port of the third heat exchanger 8 is communicated with the compression chamber, and the second port of the third heat exchanger 8 is communicated with the first expansion valve 21.

[0033] In the embodiment provided by the present invention, the heat pump system further includes: a third pipeline 30, the first port of the third pipeline 30 is communicated with the compression chamber, and the second port of the third pipeline 30 is communicated with the second opening of the first heat exchanger 2; a second expansion valve 31, and the second expansion valve 31 is arranged on the third pipeline 30. By arranging the second expansion valve 31, the refrigerant flowing through the second expansion valve 31 is throttled and depressurized and then evaporated into a low-temperature gaseous refrigerant to achieve a low evaporation temperature.

[0034] In order to further improve the utilization rate of the refrigerant, the heat pump system further includes: a fourth heat exchanger 9, the fourth heat exchanger 9 is arranged on the third pipeline 30, the first port of the fourth heat exchanger 9 is communicated with the compression chamber, and the second port of the fourth heat exchanger 9 is communicated with the second expansion valve 31.

[0035] In the specific implementation process, the heat pump system further includes: a third branch 13. The first port of the third branch 13 is connected to the second pipeline 20, and the second port of the third branch 13 is connected to the third pipeline 30. The first port of the third branch 13 is located on the side of the first expansion valve 21 close to the compression chamber, and the second port of the third branch 13 is located on the side of the second expansion valve 31 close to the compression chamber, so as to form a refrigerant circulation loop among the compression chamber, the second pipeline 20, the third branch 13 and the third pipeline 30. Wherein, a third control valve 6 is arranged on the third branch 13 to control the on-off of the third branch 13 through the third control valve 6.

[0036] The heat pump system further includes: a fourth control valve 7. The third pipeline includes: a fourth branch 14; a fifth branch 15. The fourth branch 14 and the fifth branch 15 are arranged in parallel. The third branch 13 is connected to the fifth branch 15. Both the second expansion valve 31 and the fourth control valve 7 are arranged on the fifth branch 15 to control the on-off of the fifth branch 15 through the fourth control valve 7.

[0037] Wherein, there is a communication pipe section between the fourth control valve 7 and the second expansion valve 31. The third branch 13 is connected to the communication pipe section. The second expansion valve 31 is located on the side of the fourth control valve 7 close to the first heat exchanger 2.

[0038] Specifically, the fifth branch 15 includes a first pipe section, a second pipe section and a third pipe section connected in sequence. The first pipe section is connected to the compression chamber. The third pipe section is connected to the first heat exchanger 2. The fourth control valve 7 is arranged on the first pipe section. The second expansion valve 31 is arranged on the third pipe section. The third branch 13 is connected to the second pipe section.

[0039] A first communication channel and a second communication channel are arranged in the first heat exchanger 2. The second pipeline 20 and the fourth branch 14 are connected through the first communication channel; the third pipeline 30 and the first pipeline 10 are connected through the second communication channel. Preferably, the first heat exchanger 2 is an economizer.

[0040] The compression chamber in the present invention includes a primary compression chamber 101 and a secondary compression chamber 102. The primary compression chamber 101 is connected to the secondary compression chamber 102. Wherein, there are at least two primary compression chambers 101, and at least two primary compression chambers 101 are connected to each other. The outlet of the secondary compression chamber 102 of the compression chamber is respectively connected to the first heat exchanger 2 and the primary compression chamber 101 through a four-way valve 103.

[0041] In the specific working process, when the heat pump system is in the refrigeration mode, as Figure 1As shown, the first control valve 4 and the fourth control valve 7 are closed, and the second control valve 5 and the third control valve 6 are open. The high-temperature and high-pressure gaseous refrigerant at the outlet of the compression chamber enters the third heat exchanger 8 through the four-way valve 103 and condenses into a high-temperature and high-pressure liquid refrigerant. Then it is divided into two flow paths. The first flow path passes through the first expansion valve 21 for throttling and pressure reduction, then enters the second heat exchanger 3 through the first heat exchanger 2 and evaporates and absorbs heat to become a medium-temperature gaseous refrigerant, and then is sucked into the secondary compression chamber of the compressor to achieve a medium evaporation temperature. The second flow path passes through the second expansion valve 31 for throttling and pressure reduction, enters the fourth heat exchanger 9 after passing through the first heat exchanger 2, evaporates and absorbs heat to become a low-temperature gaseous refrigerant, and then is sucked into the primary compression chamber to achieve a low evaporation temperature. In the compression chamber, the primary compression chamber sucks in the low-temperature gaseous refrigerant and compresses it to a certain pressure, then mixes with the medium-temperature gaseous refrigerant absorbed in the secondary compression chamber, and is further compressed to the outlet pressure and then discharged.

[0042] When the heat pump system is in the heating mode, as Figure 2 shown, the first control valve 4 and the fourth control valve 7 are open, and the second control valve 5 and the third control valve 6 are closed. The high-temperature and high-pressure gaseous refrigerant at the outlet of the compressor enters the fourth heat exchanger 9 through the four-way valve 103 and condenses into a high-temperature and high-pressure liquid refrigerant. Then it is divided into two flow paths. The first flow path passes through the second expansion valve 31 for throttling and pressure reduction, evaporates and absorbs heat in the first heat exchanger 2 to become a medium-temperature gaseous refrigerant, and then is sucked into the secondary compression chamber of the compression chamber. The second flow path sequentially passes through the first heat exchanger 2 and the first expansion valve 21 for throttling and pressure reduction, then enters the third heat exchanger 8 to evaporate and absorb heat to become a low-temperature gaseous refrigerant, and then is sucked into the primary compression chamber of the compressor. In the compression chamber, the primary compression chamber sucks in the low-temperature gaseous refrigerant and compresses it to a certain pressure, then mixes with the medium-temperature gaseous refrigerant absorbed in the secondary compression chamber, and is further compressed to the outlet pressure and then discharged. The present invention realizes the function of dual evaporation temperatures in the refrigeration mode of the heat pump system and the function of bipolar compression and gas boosting and enthalpy increase in the heating mode, can meet the requirements of temperature and humidity independent control under refrigeration conditions and low-temperature and high-efficiency heating, and at the same time uses the variable displacement technology of the compressor to achieve capacity adjustment and improve the performance under different working conditions.

[0043] The present invention also provides an air conditioner, including a heat pump system, and the heat pump system is the heat pump system of the above embodiment.

[0044] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0045] The heat pump system provided according to the present invention includes a compressor unit 1, a first heat exchanger 2, a first pipeline 10, and a second heat exchanger 3. Among them, the compressor unit 1 has a compression chamber for compressing the refrigerant. The outlet end of the compression chamber is communicated with the inlet end of the first heat exchanger 2, and the outlet end of the first heat exchanger 2 is communicated with the inlet end of the compression chamber; the first port of the first pipeline 10 is communicated with the first heat exchanger 2, and the second port of the first pipeline 10 is communicated with the compression chamber; the second heat exchanger 3 is arranged on the first pipeline 10 so that when the heat pump system is in the refrigeration mode, the refrigerant flows into the compression chamber after passing through the first heat exchanger 2 and the second heat exchanger 3 in sequence. Such an arrangement can achieve the first temperature adjustment of the refrigerant in the first heat exchanger 2, and then achieve the second temperature adjustment in the second heat exchanger 3, so as to maximize the utilization rate of the refrigerant, improve the working efficiency of the heat pump system, and achieve the purpose of high efficiency and energy saving of the heat pump system.

[0046] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat pump system, characterized in that, Comprising: A compressor unit (1), the compressor unit (1) having a compression chamber for compressing a refrigerant; A first heat exchanger (2), an outlet end of the first heat exchanger (2) being in communication with an inlet end of the compression chamber; A first pipeline (10), a first port of the first pipeline (10) being in communication with the first heat exchanger (2), and a second port of the first pipeline (10) being in communication with the compression chamber; A second heat exchanger (3), the second heat exchanger (3) being disposed on the first pipeline (10) such that when the heat pump system is in a refrigeration mode, the refrigerant flows into the compression chamber after sequentially passing through the first heat exchanger (2) and the second heat exchanger (3); The first pipeline (10) includes: a first branch (11); a second branch (12), the first branch (11) and the second branch (12) being arranged in parallel, and the second heat exchanger (3) being disposed on the second branch (12); The heat pump system further includes: a second pipeline (20), a first port of the second pipeline (20) being in communication with the compression chamber, and a second port of the second pipeline (20) being in communication with a first opening of the first heat exchanger (2); A third heat exchanger (8), the third heat exchanger (8) being disposed on the second pipeline (20); A third pipeline (30), a first port of the third pipeline (30) being in communication with the compression chamber, and a second port of the third pipeline (30) being in communication with a second opening of the first heat exchanger (2); A fourth heat exchanger (9), the fourth heat exchanger (9) being disposed on the third pipeline (30).

2. The heat pump system according to claim 1, wherein When the heat pump system is in a heating mode, the refrigerant flows into the compression chamber after sequentially flowing through the first heat exchanger (2) and the first branch (11).

3. The heat pump system according to claim 2, wherein, The heat pump system further includes: A first control valve (4), the first control valve (4) being disposed on the first branch (11) to control the on / off of the first branch (11) through the first control valve (4).

4. The heat pump system according to claim 2 or 3, characterized in that, The heat pump system further includes: A second control valve (5), the second control valve (5) being disposed on the second branch (12) to control the on / off of the second branch (12) through the second control valve (5).

5. The heat pump system according to claim 1, characterized in that, The heat pump system further includes: A first expansion valve (21), the first expansion valve (21) being disposed on the second pipeline (20).

6. The heat pump system according to claim 5, characterized in that, The heat pump system further includes: A first port of the third heat exchanger (8) is in communication with the compression chamber, and a second port of the third heat exchanger (8) is in communication with the first expansion valve (21).

7. The heat pump system according to claim 5, wherein The heat pump system further includes: A second expansion valve (31), the second expansion valve (31) being disposed on the third pipeline (30).

8. The heat pump system according to claim 7, characterized in that, The heat pump system further includes: A first port of the fourth heat exchanger (9) is in communication with the compression chamber, and a second port of the fourth heat exchanger (9) is in communication with the second expansion valve (31).

9. The heat pump system according to claim 7, wherein The heat pump system further includes: A third branch (13), a first port of the third branch (13) is communicated with the second pipeline (20), and a second port of the third branch (13) is communicated with the third pipeline (30); the first port of the third branch (13) is located on a side of the first expansion valve (21) close to the compression chamber, and the second port of the third branch (13) is located on a side of the second expansion valve (31) close to the compression chamber; A third control valve (6), the third control valve (6) is arranged on the third branch (13) to control the on-off of the third branch (13) through the third control valve (6).

10. The heat pump system according to claim 9, wherein, The heat pump system further includes a fourth control valve (7); the third pipeline (30) includes: A fourth branch (14); A fifth branch (15), the fourth branch (14) and the fifth branch (15) are arranged in parallel, the third branch (13) is communicated with the fifth branch (15), and both the second expansion valve (31) and the fourth control valve (7) are arranged on the fifth branch (15) to control the on-off of the fifth branch (15) through the fourth control valve (7).

11. The heat pump system according to claim 10, wherein, A communication pipe section is provided between the fourth control valve (7) and the second expansion valve (31), and the third branch (13) is communicated with the communication pipe section; the second expansion valve (31) is located on a side of the fourth control valve (7) close to the first heat exchanger (2).

12. An air conditioner, comprising a heat pump system, characterized in that, The heat pump system is the heat pump system according to any one of claims 1 to 11.

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