CN216845202U - Air-cooled heat pump unit capable of switching operation modes of air system - Google Patents
Air-cooled heat pump unit capable of switching operation modes of air system Download PDFInfo
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- CN216845202U CN216845202U CN202123195148.XU CN202123195148U CN216845202U CN 216845202 U CN216845202 U CN 216845202U CN 202123195148 U CN202123195148 U CN 202123195148U CN 216845202 U CN216845202 U CN 216845202U
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Abstract
The utility model provides an air-cooled heat pump unit capable of switching operation modes of an air system, which comprises a first refrigerant system, a second refrigerant system, a first type heat exchanger system and a second type heat exchanger system, wherein the first refrigerant system and the second refrigerant system are respectively connected with the first type heat exchanger system through refrigerant pipelines, and the second refrigerant system is respectively connected with the second type heat exchanger system through refrigerant pipelines; the first heat exchanger system comprises a first heat exchanger subsystem and a second heat exchanger subsystem, and the first heat exchanger subsystem and the second heat exchanger subsystem are connected through a refrigerant pipeline. A air cooled heat pump set of changeable wind system operational mode, heat exchanger heat exchange efficiency when can improving ordinary operating condition can extend the operating condition scope of unit, adopts the constant speed fan can effectively practice thrift the unit cost.
Description
Technical Field
The utility model belongs to air-cooled heat pump set field especially relates to an air-cooled heat pump set of changeable wind system operational mode.
Background
The air-cooled condenser is one of the main parts of the air source heat pump unit, and is generally formed by combining an axial flow fan and a fin heat exchanger. For the condenser composed of multiple systems and multiple fans, the air system can be divided into two types, namely an independent air system and a shared air system. The condenser of the independent air system needs to be provided with an air separation baffle for blocking air flow disturbance between different air systems, the condenser of the shared air system is located in the same metal plate frame, and the metal plate structure is simple.
The fan of the air-cooled condenser of the independent air system is generally an EC direct current fan or a double-speed fan, so that the air-cooled condenser is convenient to apply and adjust to meet the wider operation condition of the air source heat pump unit; the air inlet of the condenser of the independent air system is uniform, the air quantity is fully utilized, and the heat exchange efficiency of the condenser is high; the air-cooled condenser of the shared air system is generally a constant-speed axial flow fan, the system can meet different working condition requirements of the air source heat pump unit by setting the number of different fans to be opened/closed, but the heat exchange efficiency of the air-cooled condenser of the shared air system is generally lower due to uneven frontal air speed distribution of the condenser of the shared air system.
Generally, the prices of the EC fan, the double-speed fan and the constant-speed fan are reduced in sequence. The price of the EC fan with the same specification is close to 2 times of that of the constant speed fan; the price of the double-speed fan with the same specification is close to 1.2-1.4 times of that of the constant-speed fan. Therefore, except for the air cooling module with the EC fan used in some places with high precision requirements, the fans used in most engineering projects are constant-speed fans. And when the double-speed fan switches the rotating speed or different windings are switched, the electromagnetic noise is high and the temperature rise of the motor winding is high during low-speed operation, so that the double-speed fan is not beneficial to long-time stable operation, and most of the air cooling modules are not adopted. Therefore, for the air source heat pump unit, an independent air system is adopted in the aspects of heat exchange efficiency and wide operation working condition; from the structural installation and cost aspects, a common wind system is adopted.
Disclosure of Invention
In view of the above, the present invention is directed to an air-cooled heat pump unit capable of switching operation modes of an air system, which adopts an independent air system to exchange heat under normal and common working conditions, and has high heat exchange efficiency; the air-cooled condenser of the independent air is switched into the condenser of the shared air system by switching different types of electromagnetic valves and starting and stopping the constant-speed axial flow fan under the limit working condition, so that the running range of the air-cooled heat pump unit is expanded. The air-cooled heat pump unit has the advantages of high heat exchange efficiency and cost saving.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
an air-cooled heat pump unit capable of switching operation modes of an air system comprises a first refrigerant system, a second refrigerant system, a first type heat exchanger system and a second type heat exchanger system, wherein the first refrigerant system and the second refrigerant system are respectively connected with the first type heat exchanger system through refrigerant pipelines, and the second refrigerant system is respectively connected with the second type heat exchanger system through refrigerant pipelines;
the first heat exchanger subsystem and the second heat exchanger subsystem are connected through a refrigerant pipeline;
furthermore, the first refrigerant system comprises a first compressor, a first four-way valve and a first gas-liquid separator, the first compressor is connected with the first four-way valve through a refrigerant pipeline, the first four-way valve is connected with the first heat exchanger subsystem through a refrigerant pipeline, the first four-way valve is connected with the first gas-liquid separator through a refrigerant pipeline, the first gas-liquid separator is connected with the first compressor through a refrigerant pipeline, the first heat exchanger subsystem is connected with the second heat exchanger system through a refrigerant pipeline, and the first four-way valve is connected with the second heat exchange system through a refrigerant pipeline.
Further, the second refrigerant system comprises a second compressor, a second four-way valve and a second gas-liquid separator, the second compressor is connected with the second four-way valve through a refrigerant pipeline, the second four-way valve is connected with the second heat exchanger subsystem through a refrigerant pipeline, the second four-way valve is connected with the second gas-liquid separator through a refrigerant pipeline, the second gas-liquid separator is connected with the second compressor through a refrigerant pipeline, the second heat exchanger subsystem is connected with the second heat exchanger system through a refrigerant pipeline, and the second four-way valve is connected with the second heat exchange system through a refrigerant pipeline;
furthermore, the first heat exchanger subsystem comprises a first heat exchanger, a second heat exchanger, a first pipeline and a second pipeline, the first four-way valve is connected with the first pipeline through a refrigerant pipeline, a first valve, the first heat exchanger and a second valve are sequentially arranged on the first pipeline, a third valve, a second heat exchanger and a fourth valve are sequentially arranged on the second pipeline, one ends of the first pipeline and the second pipeline are connected with the first four-way valve, and the other ends of the first pipeline and the second pipeline are connected with the second heat exchanger system.
The first compressor and the second compressor have the same specification, and the compressors for the two systems of the air-cooled heat pump unit have the same specification and are constant-speed compressors suitable for the same refrigerant and lubricating oil; the compressor type is not limited, and can be a non-unloading compressor of a vortex/piston/rotor;
the four-way valves for the two systems of the air-cooled heat pump unit are four-way valves with the same specification and are suitable for the same refrigerant, lubricating oil and pressure range; when the four-way valve is powered off, the air-cooled heat pump unit is in a refrigeration mode, when the four-way valve is powered on, the sliding block in the four-way valve moves to the other end, the flow direction of a refrigerant is switched, and the system is converted into a heating mode.
Furthermore, the second heat exchanger subsystem comprises a third heat exchanger, a fourth heat exchanger, a third pipeline and a fourth pipeline, the second four-way valve is connected with the third pipeline through a refrigerant pipeline, a fifth valve, a third heat exchanger and a sixth valve are sequentially arranged on the third pipeline, a seventh valve, a fourth heat exchanger and an eighth valve are sequentially arranged on the fourth pipeline, one ends of the third pipeline and the fourth pipeline are connected with the second four-way valve, and the other ends of the third pipeline and the fourth pipeline are connected with the second heat exchanger system.
Furthermore, a ninth valve is arranged on a refrigerant pipeline connecting the first heat exchanger subsystem and the second heat exchanger, and a tenth valve is arranged on a refrigerant pipeline connecting the second heat exchanger subsystem and the second heat exchanger.
Furthermore, a first branch is connected to a refrigerant pipeline between the first four-way valve and the third valve, the other end of the first branch is connected to a refrigerant pipeline between the fourth heat exchanger and the eighth valve, and an eleventh valve is arranged on the first branch;
a second branch is arranged on a refrigerant pipeline between the fourth valve and the second type heat exchanger system, the other end of the second branch is arranged on the refrigerant pipeline between the seventh valve and the fourth heat exchanger, and a twelfth valve is arranged on the second branch;
a third branch is arranged on a refrigerant pipeline between the third valve and the second heat exchanger, the other end of the third branch is arranged on the refrigerant pipeline between the eighth valve and the second four-way valve, and a thirteenth valve is arranged on the third branch;
and a fourth branch is arranged on the refrigerant pipeline between the second heat exchanger and the fourth valve, the other end of the fourth branch is arranged on the refrigerant pipeline between the second heat exchanger system and the seventh valve, and a fourteenth valve is arranged on the fourth branch.
Furthermore, a first axial fan is arranged on one side of the first heat exchanger and one side of the second heat exchanger, and a second axial fan is arranged on one side of the third heat exchanger and one side of the fourth heat exchanger.
Further, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the eleventh valve, the twelfth valve, the thirteenth valve and the fourteenth valve are valves of a first type, the ninth valve and the tenth valve are valves of a second type,
the first type valve is a two-way conduction electromagnetic valve, only has an on-off function and does not have a dynamic proportional flow regulation function; the valve body is opened when power is supplied, the opening degree is 100 percent, the valve body is closed when power is lost, the opening degree is 0 percent, and no refrigerant leaks when the valve body is closed; the first type valves are respectively arranged at the inlet and the outlet of the first type heat exchanger, and the refrigerant distribution between the two systems of the first type heat exchanger is switched by switching the opening or closing of different first type valves; the same system of refrigerant is positioned in different air systems, and then the conversion of an independent air direction shared air system is realized by starting and stopping the axial flow fan, so that the wider operating condition is met;
the second type valve is a throttle valve, has dynamic flow regulation and is about, the minimum opening proportion is 0, the maximum opening proportion is 100%, and the opening regulation is carried out according to the suction superheat degree of a system compressor so as to ensure the stability of the system operation; the second type of valve for the double systems of the air-cooled heat pump unit is an electronic expansion valve with the same specification and suitable for the same refrigerant and pressure range.
Furthermore, the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger are fin tube heat exchangers, an air isolating baffle is arranged between the first heat exchanger and the second heat exchanger, and an air isolating baffle is arranged between the third heat exchanger and the fourth heat exchanger. The default of the double-system air-cooled heat exchanger is mutually independent air systems. Each system refrigerant is divided into two parts through a copper tee joint before entering the air-cooled heat exchanger, and the two parts enter the corresponding two finned tube heat exchangers respectively for heat exchange. The single finned tube heat exchanger can be L-shaped/U-shaped/V-shaped, the fin type can be flat type/windowing type/corrugated type, and the heat exchange tube can be an internal thread heat exchange tube with the diameter of 7mm/9.52 mm. The first axial fan and the second axial fan are constant-speed fans without speed regulation function.
Furthermore, the second type of heat exchanger system is a water-cooling dry shell-and-tube heat exchanger, the double system and the double flow are adopted, a refrigerant flows in the heat exchange tube, and water flows on the shell side; the two systems of refrigerants are mutually independent and do not influence each other, but share the same water system for heat exchange.
The first gas-liquid separator and the second gas-liquid separator are vertically installed, and the effective volume of the first gas-liquid separator and the second gas-liquid separator is not less than 85% of the refrigerant filling amount of the single system.
To the prior art, an air-cooled heat pump unit of changeable wind system operational mode have following beneficial effect:
the utility model provides a but switching wind system operational mode's air-cooled heat pump set, through opening of different grade type solenoid valve switching and constant speed axial fan stops, realize that air-cooled heat pump set air-cooled condenser switches between independent wind and common wind, heat exchanger heat exchange efficiency when can improving ordinary operating mode on the one hand, two can extend the operating mode scope of unit, three adopt the constant speed fan can effectively practice thrift the unit cost.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a flow chart of the operation of an independent cooling air flow of an air-cooled heat pump unit capable of switching the operation modes of an air system;
FIG. 2 is a flow chart of the operation of a cooling shared air of an air-cooled heat pump unit capable of switching the operation modes of the air system;
FIG. 3 is a flow chart of the operation of an air-cooled heat pump unit with switchable air system operation modes to heat independent air;
fig. 4 is a flow chart of the operation of the air-cooled heat pump unit heating shared air capable of switching the operation mode of the air system.
Description of reference numerals:
1a, a first compressor; 1b, a second compressor; 2a, a first four-way valve; 2b, a second four-way valve; 3a, a first axial flow fan; 3b, a second shaft current motor; 4a, a first heat exchanger; 4b, a second heat exchanger; 4c, a third heat exchanger; 4d, a fourth heat exchanger; 5a, a first valve; 5c, a second valve; 5b, a third valve; 5d, a fourth valve; 5g, a fifth valve; 5e, a sixth valve; 5h, a seventh valve; 5f, an eighth valve; 6. an eleventh valve; 7. a twelfth valve; 8. a thirteenth valve; 9. a fourteenth valve; 10a, a ninth valve; 10b, a tenth valve; 11a, a first gas-liquid separator; 11b and a second gas-liquid separator.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
An air-cooled heat pump unit capable of switching operation modes of an air system is composed of a double-refrigerant system. The first refrigerant system is formed by sequentially connecting a first compressor 1a, a first four-way valve 2a, a first valve 5a, a second valve 5c, a third valve 5b and a fourth valve 5d, a first type heat exchanger subsystem, a ninth valve 10a, a second type heat exchanger system 12 and a first gas-liquid separator 11a through refrigerant pipelines, and a first axial flow fan 3a is mounted at the upper part of the first type heat exchanger subsystem; the second refrigerant system is formed by connecting a second compressor 1b, a second four-way valve 2b, a fifth valve 5g, a sixth valve 5e, a seventh valve 5h and an eighth valve 5f, a first type heat exchanger subsystem, a tenth valve 10b, a second type heat exchanger system 12 and a second gas-liquid separator 11b through refrigerant pipelines in sequence, a first axial fan 3a is installed on the upper portion of the first type heat exchanger subsystem, a second axial fan 3b is installed on the upper portion of the second type heat exchanger subsystem, a branch is connected between inlet and outlet pipelines of a third heat exchanger 4c and a fourth heat exchanger 4d, and an eleventh valve 6, a twelfth valve 7, a thirteenth valve 8 and a fourteenth valve 9 are installed on the branch.
Firstly, after the unit is welded and assembled, the whole air-cooled heat pump unit is vacuumized. When the vacuum pumping is carried out, all the first type valves are powered on by 100 percent and are opened and conducted, and all the second type valves are kept at the factory initial opening degree. And after the vacuum degree of the system reaches the national standard, the eleventh valve 6, the twelfth valve 7, the thirteenth valve 8 and the fourteenth valve 9 of the first type valve are powered off, the opening degree of the first type valve is changed into 0%, and the double-refrigerant system is not communicated. And then the refrigerant is respectively filled into the two refrigerant systems, and the refrigerant filling amount of the two systems is consistent.
The mode of switching the operation modes of the air system of the air cooling and heating pump unit under different operation conditions is explained below.
The flow chart of the operation of the independent air cooling of the air-cooled heat pump unit shown in figure 1; the operation mode is a normal common working condition, wherein the eleventh valve 6, the twelfth valve 7, the thirteenth valve 8 and the fourteenth valve 9 are in a power-off state, and the dual-refrigerant system operates independently. The specific process is as follows: in the first refrigerant system, a refrigerant is compressed into a high-temperature and high-pressure superheated gas state by a compressor 1a, flows through a first valve 5a and a third valve 5b by a four-way valve 2a, then enters a first heat exchanger 4a and a second heat exchanger 4b of a first type heat exchanger subsystem, and at the moment, a first axial flow fan 3a operates normally to exchange the heat of the refrigerant to ambient air so as to achieve the purpose of heat dissipation; the refrigerant is changed into a medium-temperature high-pressure supercooled liquid refrigerant through the heat exchanger, flows through the second valve 5c and the fourth valve 5d, flows to the ninth valve 10a, is throttled to be changed into a low-temperature low-pressure two-phase mixed refrigerant, then flows to the second heat exchanger system 12, exchanges heat with water on the shell side of the heat exchanger, is changed into low-temperature low-pressure superheated steam, flows through the first gas-liquid separator 11a, returns to an air suction port of the first compressor 1a, and completes the whole cycle. Similarly, the second refrigerant system is also the same as the complete cycle of the cooling operation of the independent air system, and the description is omitted here.
Because the air-cooled heat pump unit that utility model introduced adopts the constant speed fan, if adopt the operation of independent air system always, the operating range of unit is narrower. Especially, under certain working conditions of high-temperature heating and low-temperature cooling, the fan which always runs at high speed can cause that the low pressure of the air-cooled heat pump unit is too high or the high pressure is too low, and further exceeds the running range of the compressor. Therefore, the operation condition of the compressor is adapted by switching the air system into a common air system and closing one axial flow fan. FIG. 2 is a flow chart of the operation of the air-cooled heat pump unit with cooling air;
it should be noted that before the refrigeration common air is switched, the refrigerant needs to be recovered to the second heat exchanger 12 first, so as to avoid the mutual circulation of the refrigerant when the refrigerant flow is switched by the first heat exchanger, which results in a large difference between the two refrigerant systems. The specific operation mode is as shown in the flow chart of the operation of the air-cooled heat pump unit for heating independent air shown in fig. 3, and the second refrigerant system is taken as an example to explain: wherein the eleventh valve 6, the twelfth valve 7, the thirteenth valve 8 and the fourteenth valve 9 are in a power-off state, and the dual refrigerant system operates independently. The compressor 1b compresses the refrigerant into a high-temperature high-pressure superheated gas state, the four-way valve is electrified in advance to switch the flow direction, the refrigerant is distributed to the second heat exchanger system 12 to be changed into a medium-temperature high-pressure supercooled liquid refrigerant, then the refrigerant flows to the tenth valve 10b and is throttled to be changed into a low-temperature low-pressure two-phase mixed refrigerant, then the refrigerant enters the third heat exchanger 4c and the fourth heat exchanger 4d of the first type heat exchanger subsystem after passing through the fifth valve 5g and the seventh valve 5h to be evaporated and absorbed, at the moment, the second axial flow fan 3b operates normally, the refrigerant absorbs the heat of the surrounding air to be evaporated to be changed into a gaseous refrigerant, then the gaseous refrigerant flows through the sixth valve 5e and the eighth valve 5f to be combined and enters the second four-way valve 2b, and then the gaseous refrigerant returns to the second compressor 1b after passing through the second gas-liquid separator 11 b. After the double-refrigerant system heating independent air system runs for 5min, the opening degrees of the ninth valve 10a and the tenth valve 10b are gradually reduced, refrigerants in the first heat exchanger 4a, the second heat exchanger 4b, the third heat exchanger 4c and the fourth heat exchanger 4d are gradually recycled into the second heat exchanger system 12 until low-pressure alarm values of the first compressor 1a and the second compressor 1b are reached, then the first compressor 1a and the second compressor 1b are closed, meanwhile, the first valve 5a, the second valve 5c, the third valve 5b and the fourth valve 5d in the double-refrigerant system are powered off, and refrigerant backflow in the second heat exchanger system 12 is blocked.
And then, the air system of the air-cooled heat pump unit can be switched from independent air to shared air. The flow chart of the operation of the air-cooled heat pump unit with cooling shared air is shown in fig. 2. In this mode, the first four-way valve 2a and the second four-way valve 2b are not powered, the third valve 5b, the fourth valve 5d, the seventh valve 5h and the eighth valve 5f are powered off, and then the first valve 5a, the sixth valve 5e, the eleventh valve 6, the twelfth valve 7, the thirteenth valve 8 and the fourteenth valve 9 are powered on. Therefore, the first type heat exchanger subsystem forms a common refrigerant system, and the second heat exchanger 4b and the third heat exchanger 4c form a common refrigerant system. When the axial flow fan 3a is powered off, the axial flow fan 3b is not started any more, and the constant speed operation is kept. Therefore, one of the two heat exchangers corresponding to the same refrigerant system is positioned in the air system, and the other heat exchanger is positioned in the natural heat exchange system, so that the high-pressure of the system under the low-temperature refrigeration working condition can be effectively improved, and the refrigeration operation range of the unit can be conveniently expanded. The specific process comprises the following steps: in the first refrigerant system, a refrigerant is compressed into a high-temperature and high-pressure superheated gas state by a compressor 1a, flows through a first valve 5a and an eleventh valve 6 by a first four-way valve 2a, then enters a first heat exchanger 4a and a fourth heat exchanger 4d, then flows through a second valve 5c and a twelfth valve 7, is combined, flows to a ninth valve 10a, enters a second heat exchanger system 12, and then returns to the first compressor 1a through a first gas-liquid separator 11 a; in the second refrigerant system, the refrigerant is compressed into a high-temperature and high-pressure superheated gas by the second compressor 1b, flows through the sixth valve 5e and the thirteenth valve 8 by the second four-way valve 2b, then enters the third heat exchanger 4c and the second heat exchanger 4b, then flows through the fifth valve 5g and the fourteenth valve 9, is combined, flows to the fourteenth valve 10b, enters the second type heat exchanger system 12, and then returns to the second compressor 1b by the second gas-liquid separator 11 b; i.e. the whole cycle is completed.
Similarly, for the operation of the air-cooled heat pump unit for heating the common air, similar to the operation mode of the cooling common air, the only difference is that the first four-way valve 2a and the second four-way valve 2b are powered to switch the flow direction of the refrigerant, and the refrigerant first enters the second heat exchanger 12 for the heating mode, which is not described herein again.
The utility model provides an air-cooled heat pump set of changeable wind system operational mode: the heat exchange of the unit is high by adopting the independent air system under the normal common working condition; under the limit working condition, the air-cooled condenser of the independent air system is switched into the air-cooled condenser of the shared air system through the switching of different types of electromagnetic valves and the starting/stopping of the constant-speed axial flow fan; on one hand, the heat exchange efficiency of the heat exchanger under the common operation condition can be improved, on the other hand, the operation condition range of the unit can be expanded, and on the other hand, the unit cost can be effectively saved by adopting the constant-speed fan.
The above is an overview description of the implementation of the present invention, but the present design is not limited to the above-described embodiments. Those skilled in the art can make changes and modifications within the reasonable scope of the inventive design without departing from the spirit and scope of the inventive design. It is intended that the present design also includes such changes and modifications as fall within the scope of the appended claims or equivalents thereof.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an air-cooled heat pump set of changeable wind system operational mode which characterized in that: the system comprises a first refrigerant system, a second refrigerant system, a first type heat exchanger system and a second type heat exchanger system, wherein the first refrigerant system and the second refrigerant system are respectively connected with the first type heat exchanger system through refrigerant pipelines, and the second refrigerant system is respectively connected with the second type heat exchanger system through refrigerant pipelines;
the first heat exchanger system comprises a first heat exchanger subsystem and a second heat exchanger subsystem, and the first heat exchanger subsystem and the second heat exchanger subsystem are connected through a refrigerant pipeline.
2. The air-cooled heat pump unit with switchable air system operation modes according to claim 1, wherein: the first refrigerant system comprises a first compressor (1a), a first four-way valve (2a) and a first gas-liquid separator (11a), the first compressor (1a) is connected with the first four-way valve (2a) through a refrigerant pipeline, the first four-way valve (2a) is connected with a first heat exchanger subsystem through a refrigerant pipeline, the first four-way valve (2a) is connected with the first gas-liquid separator (11a) through a refrigerant pipeline, the first gas-liquid separator (11a) is connected with the first compressor (1a) through a refrigerant pipeline, the first heat exchanger subsystem is connected with a second heat exchanger subsystem through a refrigerant pipeline, and the first four-way valve (2a) is connected with the second heat exchange system through a refrigerant pipeline.
3. The air-cooled heat pump unit capable of switching the operation modes of the air system according to claim 1, wherein: the second refrigerant system comprises a second compressor (1b), a second four-way valve (2b) and a second gas-liquid separator (11b), the second compressor (1b) is connected with the second four-way valve (2b) through a refrigerant pipeline, the second four-way valve (2b) is connected with the second heat exchanger subsystem through a refrigerant pipeline, the second four-way valve (2b) is connected with the second gas-liquid separator (11b) through a refrigerant pipeline, the second gas-liquid separator (11b) is connected with the second compressor (1b) through a refrigerant pipeline, the second heat exchanger subsystem is connected with the second heat exchanger subsystem through a refrigerant pipeline, and the second four-way valve (2b) is connected with the second heat exchange system through a refrigerant pipeline.
4. The air-cooled heat pump unit capable of switching the operation modes of the air system according to claim 3, wherein: the first heat exchanger subsystem comprises a first heat exchanger (4a), a second heat exchanger (4b), a first pipeline and a second pipeline, a first four-way valve (2a) is connected with the first pipeline through a refrigerant pipeline, a first valve (5a), the first heat exchanger (4a) and a second valve (5c) are sequentially arranged on the first pipeline, a third valve (5b), the second heat exchanger (4b) and a fourth valve (5d) are sequentially arranged on the second pipeline, one ends of the first pipeline and the second pipeline are connected with the first four-way valve (2a), and the other ends of the first pipeline and the second pipeline are connected with a second heat exchanger system.
5. The air-cooled heat pump unit with switchable air system operation modes according to claim 4, wherein: the first compressor (1a) and the second compressor (1b) have the same specification, and the first compressor (1a) and the second compressor (1b) are constant speed compressors with the same specification and suitable for the same refrigerant and lubricating oil;
the first four-way valve (2a) and the second four-way valve (2b) are four-way valves with the same specification and are suitable for the same refrigerant, lubricating oil and pressure range.
6. The air-cooled heat pump unit capable of switching the operation modes of the air system according to claim 4, wherein: the second heat exchanger subsystem comprises a third heat exchanger (4c), a fourth heat exchanger (4d), a third pipeline and a fourth pipeline, the second four-way valve (2b) is connected with the third pipeline through a refrigerant pipeline, the third pipeline is sequentially provided with a fifth valve (5g), the third heat exchanger (4c) and a sixth valve (5e), the fourth pipeline is sequentially provided with a seventh valve (5h), the fourth heat exchanger (4d) and an eighth valve (5f), one ends of the third pipeline and the fourth pipeline are connected with the second four-way valve (2b), and the other ends of the third pipeline and the fourth pipeline are connected with the second heat exchanger system.
7. The air-cooled heat pump unit with switchable air system operation modes according to claim 6, wherein: a ninth valve (10a) is arranged on a refrigerant pipeline connecting the first heat exchanger subsystem and the second heat exchanger (4b), and a tenth valve (10b) is arranged on a refrigerant pipeline connecting the second heat exchanger subsystem and the second heat exchanger (4 b);
a first branch is connected to a refrigerant pipeline between the first four-way valve (2a) and the third valve (5b), the other end of the first branch is connected to a refrigerant pipeline between the fourth heat exchanger (4d) and the eighth valve (5f), and an eleventh valve (6) is arranged on the first branch;
a second branch is arranged on a refrigerant pipeline between the fourth valve (5d) and the second heat exchanger system, the other end of the second branch is arranged on the refrigerant pipeline between the seventh valve (5h) and the fourth heat exchanger (4d), and a twelfth valve (7) is arranged on the second branch;
a third branch is arranged on a refrigerant pipeline between the third valve (5b) and the second heat exchanger (4b), the other end of the third branch is arranged on the refrigerant pipeline between the eighth valve (5f) and the second four-way valve (2b), and a thirteenth valve (8) is arranged on the third branch;
and a fourth branch is arranged on a refrigerant pipeline between the second heat exchanger (4b) and the fourth valve (5d), the other end of the fourth branch is arranged on a refrigerant pipeline between the second heat exchanger system and the seventh valve (5h), and a fourteenth valve (9) is arranged on the fourth branch.
8. The air-cooled heat pump unit capable of switching the operation modes of the air system according to claim 7, wherein: a first axial fan (3a) is arranged on one side of the first heat exchanger (4a) and one side of the second heat exchanger (4b), and a second axial fan is arranged on one side of the third heat exchanger (4c) and one side of the fourth heat exchanger (4 d);
the first valve (5a), the second valve (5c), the third valve (5b), the fourth valve (5d), the fifth valve (5g), the sixth valve (5e), the seventh valve (5h), the eighth valve (5f), the eleventh valve (6), the twelfth valve (7), the thirteenth valve (8) and the fourteenth valve (9) are of a first type, and the ninth valve (10a) and the tenth valve (10b) are of a second type;
the first type valve is a two-way conduction electromagnetic valve, and the second type valve is a throttle valve.
9. The air-cooled heat pump unit capable of switching the operation modes of the air system according to claim 8, wherein: the first heat exchanger (4a), the second heat exchanger (4b), the third heat exchanger (4c) and the fourth heat exchanger (4d) are finned tube heat exchangers, a wind-isolating baffle is arranged between the first heat exchanger (4a) and the second heat exchanger (4b), a wind-isolating baffle is arranged between the third heat exchanger (4c) and the fourth heat exchanger (4d), the finned tube heat exchanger is of one of an L type, a U type and a V type, the fin type can be one of a flat type, a windowing type and a corrugated type, and the heat exchange tubes can be internal thread heat exchange tubes with the diameter of 7mm/9.52 mm;
the first axial fan and the second axial fan are constant-speed fans without speed regulation function.
10. The air-cooled heat pump unit capable of switching the operation modes of the air system according to claim 2, wherein: the second type of heat exchanger system is a water-cooling dry shell-and-tube heat exchanger;
the first gas-liquid separator (11a) and the second gas-liquid separator (11b) are vertically installed, and the effective volume of the first gas-liquid separator and the second gas-liquid separator is not less than 85% of the filling amount of the refrigerant of the single system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123195148.XU CN216845202U (en) | 2021-12-17 | 2021-12-17 | Air-cooled heat pump unit capable of switching operation modes of air system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123195148.XU CN216845202U (en) | 2021-12-17 | 2021-12-17 | Air-cooled heat pump unit capable of switching operation modes of air system |
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| Publication Number | Publication Date |
|---|---|
| CN216845202U true CN216845202U (en) | 2022-06-28 |
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| CN202123195148.XU Active CN216845202U (en) | 2021-12-17 | 2021-12-17 | Air-cooled heat pump unit capable of switching operation modes of air system |
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| Country | Link |
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| CN (1) | CN216845202U (en) |
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