An air conditioning unit combining heat pipe refrigeration and mechanical refrigeration

Abstract

The utility model relates to the technical field of air conditioning, and specifically to an air conditioning unit combining heat pipe refrigeration and mechanical refrigeration, including a heat pipe system and a compressor system; the heat pipe system includes a first heat pipe heat exchanger, a second heat pipe heat exchanger and a heat pipe control valve; the compressor system includes a compressor, a throttling device, a first mechanical heat exchanger and a second mechanical heat exchanger. The utility model can simultaneously utilize the first heat pipe heat exchanger, the second heat pipe heat exchanger, the first mechanical heat exchanger and the second mechanical heat exchanger for heat exchange by arranging a plurality of control valves and connecting pipes between the heat pipe system and the compressor system for connection, thereby improving the utilization rate of each heat exchanger and effectively increasing the heat exchange area of ​​the evaporation side and the condensation side.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioning unit combining heat pipe refrigeration and mechanical refrigeration. Background Art

[0002] With the rapid development of manufacturing technology and integration technology, the heat generation of electronic equipment per unit area is getting higher and higher, the heat flux density inside the cabinet is increasing, and the power consumption is also growing rapidly. The requirements for the cooling capacity and energy-saving effect of cabinet air-conditioning equipment are also getting higher and higher. The composite air-conditioning unit that combines the gravity-type split heat pipe refrigeration and air-conditioning system without compressor and the conventional mechanical refrigeration and air-conditioning system with compressor can improve the cooling capacity and energy-saving effect.

[0003] The current heat pipe refrigeration system and mechanical refrigeration system are independent of each other, the heat exchanger is not fully utilized and causes wind resistance, resulting in a waste of resources. When the ambient temperature inside the cabinet is close to the ambient temperature outside the cabinet or the temperature inside the cabinet is lower than the ambient temperature outside the cabinet, the refrigeration effect of the heat pipe refrigeration system is very poor. At this time, the heat pipe refrigeration condenser and the heat pipe refrigeration evaporator are not utilized. When the ambient temperature inside the cabinet is much higher than the ambient temperature outside the cabinet, a pure heat pipe refrigeration system can be used for refrigeration, and the mechanical refrigeration system does not work. At this time, the mechanical refrigeration condenser and the mechanical refrigeration evaporator are not utilized. When the ambient temperature inside and outside the cabinet is high, the mechanical refrigeration system is in an overloaded working state. The unused condenser is likely to cause poor heat dissipation of the heat exchanger working on the outdoor side, resulting in the compressor protection shutdown. Utility Model Content

[0004] The utility model aims to address the above-mentioned deficiencies in the prior art and to provide an air conditioning unit combining heat pipe refrigeration and mechanical refrigeration, which can effectively improve the utilization rate of each heat exchanger.

[0005] The purpose of the utility model is achieved through the following technical solutions: an air conditioning unit combining heat pipe refrigeration and mechanical refrigeration, including a heat pipe system and a compressor system;

[0006] The heat pipe system comprises a first heat pipe heat exchanger, a second heat pipe heat exchanger and a heat pipe control valve; one end of the second heat pipe heat exchanger is connected to one end of the first heat pipe heat exchanger; the other end of the first heat pipe heat exchanger is connected to the other end of the second heat pipe heat exchanger through the heat pipe control valve;

[0007] The compressor system includes a compressor, a throttling device, a first mechanical heat exchanger and a second mechanical heat exchanger; one end of the second mechanical heat exchanger is connected to one end of the compressor; the other end of the compressor is connected to one end of the first mechanical heat exchanger; the other end of the first mechanical heat exchanger is connected to the other end of the second mechanical heat exchanger through the throttling device;

[0008] A first connecting pipe is provided between the other end of the compressor and one end of the first heat pipe heat exchanger; the first connecting pipe is provided with a first control valve;

[0009] A second connecting pipe is provided between the other end of the first heat pipe heat exchanger and the other end of the first mechanical heat exchanger; the second connecting pipe is provided with a second control valve;

[0010] A third connecting pipe is provided between one end of the second heat pipe heat exchanger and one end of the second mechanical heat exchanger; the third connecting pipe is provided with a third control valve;

[0011] A fourth connecting pipe is provided between the other end of the second heat pipe heat exchanger and the other end of the second mechanical heat exchanger; and a fourth control valve is provided on the fourth connecting pipe.

[0012] The utility model is further configured such that a one-way valve is provided between one end of the second heat pipe heat exchanger and one end of the first heat pipe heat exchanger.

[0013] The utility model is further configured that the throttling element is an expansion valve.

[0014] The utility model is further configured that the heat pipe control valve, the first control valve, the second control valve, the third control valve and the fourth control valve are all solenoid valves.

[0015] The utility model is further configured to further include a first fan; the first fan, the first heat pipe heat exchanger and the first mechanical heat exchanger are arranged opposite to each other.

[0016] The utility model is further configured to further include a second fan; the second fan, the second heat pipe heat exchanger and the second mechanical heat exchanger are arranged opposite to each other.

[0017] The utility model is further configured such that the first fan is arranged on a side close to the first mechanical heat exchanger.

[0018] The utility model is further configured such that the second fan is arranged on a side close to the second mechanical heat exchanger.

[0019] The beneficial effects of the utility model are as follows: the utility model sets a plurality of control valves and connecting pipes between the heat pipe system and the compressor system for connection, and can simultaneously utilize the first heat pipe heat exchanger, the second heat pipe heat exchanger, the first mechanical heat exchanger and the second mechanical heat exchanger for heat exchange, thereby improving the utilization rate of each heat exchanger and effectively increasing the heat exchange area on the evaporation side and the condensation side. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the utility model in pure mechanical mode;

[0022] Figure 2 This is a schematic diagram of the structure of the utility model in a mechanical and heat pipe hybrid mode;

[0023] Figure 3 This is a schematic diagram of the structure of the utility model in pure heat pipe mode;

[0024] Figure 4 This is a schematic diagram of the structure of the utility model in the mechanical refrigeration overload mode;

[0025] Among them: 11, the first heat pipe heat exchanger; 12, the second heat pipe heat exchanger; 13, the heat pipe control valve; 14, the one-way valve; 21, the compressor; 22, the throttling device; 23, the first mechanical heat exchanger; 24, the second mechanical heat exchanger; 31, the first connecting pipe; 32, the first control valve; 41, the second connecting pipe; 42, the second control valve; 51, the third connecting pipe; 52, the third control valve; 61, the fourth connecting pipe; 62, the fourth control valve; 71, the first fan; 72, the second fan. DETAILED DESCRIPTION

[0026] The utility model is further described in conjunction with the following embodiments.

[0027] Depend on Figures 1 to 4 It can be seen that the air conditioning unit combining heat pipe refrigeration and mechanical refrigeration described in this embodiment includes a heat pipe system and a compressor system;

[0028] The heat pipe system includes a first heat pipe heat exchanger 11, a second heat pipe heat exchanger 12 and a heat pipe control valve 13; one end of the second heat pipe heat exchanger 12 is connected to one end of the first heat pipe heat exchanger 11; the other end of the first heat pipe heat exchanger 11 is connected to the other end of the second heat pipe heat exchanger 12 through the heat pipe control valve 13;

[0029] The compressor system includes a compressor 21, a throttling device 22, a first mechanical heat exchanger 23 and a second mechanical heat exchanger 24; one end of the second mechanical heat exchanger 24 is connected to one end of the compressor 21; the other end of the compressor 21 is connected to one end of the first mechanical heat exchanger 23; the other end of the first mechanical heat exchanger 23 is connected to the other end of the second mechanical heat exchanger 24 through the throttling device 22;

[0030] A first connecting pipe 31 is provided between the other end of the compressor 21 and one end of the first heat pipe heat exchanger 11; the first connecting pipe 31 is provided with a first control valve 32;

[0031] A second connecting pipe 41 is provided between the other end of the first heat pipe heat exchanger 11 and the other end of the first mechanical heat exchanger 23; the second connecting pipe 41 is provided with a second control valve 42;

[0032] A third connecting pipe 51 is provided between one end of the second heat pipe heat exchanger 12 and one end of the second mechanical heat exchanger 24; the third connecting pipe 51 is provided with a third control valve 52;

[0033] A fourth connecting pipe 61 is provided between the other end of the second heat pipe heat exchanger 12 and the other end of the second mechanical heat exchanger 24 ; a fourth control valve 62 is provided in the fourth connecting pipe 61 .

[0034] In this embodiment, a plurality of control valves and connecting pipes are arranged between the heat pipe system and the compressor system for connection. When the pure heat pipe refrigeration mode and the pure mechanical refrigeration mode are operated, the first heat pipe heat exchanger 11, the second heat pipe heat exchanger 12, the first mechanical heat exchanger 23 and the second mechanical heat exchanger 24 can be used for heat exchange at the same time, thereby improving the utilization rate of each heat exchanger, effectively increasing the heat exchange area on the evaporation side and the condensation side, improving the cooling capacity and energy efficiency ratio of the compressor system, and widening the temperature range of the heat pipe system operation.

[0035] When the ambient temperature inside and outside the cabinet is high, by controlling the opening and closing of the four control valves, only the first heat pipe heat exchanger 11 and the first mechanical heat exchanger 23 are connected in parallel, thereby increasing the condensation and heat dissipation area of ​​the compressor system when operating under overload conditions, reducing the condenser pressure and temperature, and improving the operating reliability of the unit.

[0036] In the air conditioning unit combining heat pipe refrigeration and mechanical refrigeration described in this embodiment, a one-way valve 14 is provided between one end of the second heat pipe heat exchanger 12 and one end of the first heat pipe heat exchanger 11 .

[0037] Specifically, this embodiment has the following multiple modes:

[0038] like Figure 1 As shown, this mode is a pure mechanical mode (when the inner ring temperature - outer ring temperature < T1; T1 can be 0-5°C): the first control valve 32, the second control valve 42, the third control valve 52, and the fourth control valve 62 are all controlled to be open; the heat pipe control valve 13 is closed; the throttling element 22 is controlled according to the normal throttling opening. At this time, the first mechanical heat exchanger 23 and the first heat pipe heat exchanger 11 are in a parallel connection state, and both are used as condensers in the mechanical refrigeration mode for condensation and heat dissipation; the second mechanical heat exchanger 24 and the second heat pipe heat exchanger 12 are in a parallel connection state, and both are used as evaporators in the mechanical refrigeration mode for evaporation and heat absorption.

[0039] like Figure 2As shown, this mode is a mechanical and heat pipe mixed mode (when the inner ring temperature - the outer ring temperature ≥ T1; T1 can be 0-5°C): the first control valve 32, the second control valve 42, the third control valve 52, and the fourth control valve 62 are all controlled to be closed; the heat pipe control valve 13 is opened; the throttling device 22 is controlled according to the normal throttling opening; at this time, the compressor system and the heat pipe system are separated from each other and work separately.

[0040] like Figure 3 As shown, this mode is a pure heat pipe mode (when the inner ring temperature - the outer ring temperature ≥ T2; T2 can be 10-25°C): the first control valve 32, the second control valve 42, the third control valve 52, the fourth control valve 62, and the heat pipe control valve 13 are all controlled to be open; the throttling device 22 is completely closed and is in a valve closed and no-flow state; at this time, the first mechanical heat exchanger 23 and the first heat pipe heat exchanger 11 are in a parallel connection state, and both are used as condensers in the heat pipe cooling mode for condensation and heat dissipation; the second mechanical heat exchanger 24 and the second heat pipe heat exchanger 12 are in a parallel connection state, and both are used as evaporators in the heat pipe cooling mode for evaporation and heat absorption.

[0041] like Figure 4 As shown, this mode is a mechanical refrigeration overload mode (when the inner ring temperature is greater than T3 and the outer ring temperature is greater than T4; T3 can be 30-45°C and T4 can be 40-55°C): the first control valve 32 and the second control valve 42 are both opened; the third control valve 52, the fourth control valve 62 and the heat pipe control valve 13 are all closed; the throttling element 22 is controlled according to the normal throttling opening. At this time, the first mechanical heat exchanger 23 and the first heat pipe heat exchanger 11 are in a parallel connection state, and both are used as condensers in the mechanical refrigeration mode for condensation and heat dissipation. Increasing the heat dissipation area can reduce the condensation pressure and temperature; only the second mechanical heat exchanger 24 is evaporating and absorbing heat, and the second heat pipe heat exchanger 12 is in a non-working state. At this time, the outdoor heat load and condensation pressure are relatively large. Matching a small-area evaporator can reduce the heat absorption (i.e., cooling capacity) of the evaporation side from the indoor environment, and can further reduce the outdoor heat load and condensation pressure, avoid the shutdown of the compressor 21 caused by high temperature and high pressure, and improve the unit operation reliability.

[0042] In the air conditioning unit combining heat pipe refrigeration and mechanical refrigeration described in this embodiment, the throttling element 22 is an expansion valve. The above arrangement facilitates the control of the flow rate between the other end of the first mechanical heat exchanger 23 and the other end of the second mechanical heat exchanger 24.

[0043] In the air conditioning unit combining heat pipe refrigeration and mechanical refrigeration described in this embodiment, the heat pipe control valve 13, the first control valve 32, the second control valve 42, the third control valve 52 and the fourth control valve 62 are all solenoid valves. The above arrangement facilitates the control of the on-off of each connecting pipe.

[0044] The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration described in this embodiment further includes a first fan 71; the first fan 71, the first heat pipe heat exchanger 11 and the first mechanical heat exchanger 23 are arranged opposite to each other. The above arrangement facilitates faster blowing out of the system heat to the external environment.

[0045] The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration described in this embodiment further includes a second fan 72; the second fan 72, the second heat pipe heat exchanger 12 and the second mechanical heat exchanger 24 are arranged opposite to each other. The above arrangement facilitates the system's cold energy to be blown out and released to the target space in a more timely manner.

[0046] In the air conditioning unit combining heat pipe refrigeration and mechanical refrigeration described in this embodiment, the first fan 71 is arranged on a side close to the first mechanical heat exchanger 23. The above arrangement enables the first mechanical heat exchanger 23 with a relatively high temperature to be cooled first, thereby further enhancing the efficiency of the air conditioning unit.

[0047] In the air conditioning unit combining heat pipe refrigeration and mechanical refrigeration described in this embodiment, the second fan 72 is arranged on a side close to the second mechanical heat exchanger 24. The above arrangement enables the second mechanical heat exchanger 24 with a relatively low temperature to be cooled first, thereby further enhancing the efficiency of the air conditioning unit.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. An air conditioning unit combining heat pipe refrigeration and mechanical refrigeration, characterized in that: Including heat pipe system and compressor system; The heat pipe system comprises a first heat pipe heat exchanger (11), a second heat pipe heat exchanger (12) and a heat pipe control valve (13); one end of the second heat pipe heat exchanger (12) is connected to one end of the first heat pipe heat exchanger (11); the other end of the first heat pipe heat exchanger (11) is connected to the other end of the second heat pipe heat exchanger (12) through the heat pipe control valve (13); The compressor system comprises a compressor (21), a throttling device (22), a first mechanical heat exchanger (23), and a second mechanical heat exchanger (24); one end of the second mechanical heat exchanger (24) is in communication with one end of the compressor (21); the other end of the compressor (21) is in communication with one end of the first mechanical heat exchanger (23); the other end of the first mechanical heat exchanger (23) is in communication with the other end of the second mechanical heat exchanger (24) via the throttling device (22); A first connecting pipe (31) is provided between the other end of the compressor (21) and one end of the first heat pipe heat exchanger (11); the first connecting pipe (31) is provided with a first control valve (32); A second connecting pipe (41) is provided between the other end of the first heat pipe heat exchanger (11) and the other end of the first mechanical heat exchanger (23); the second connecting pipe (41) is provided with a second control valve (42); A third connecting pipe (51) is provided between one end of the second heat pipe heat exchanger (12) and one end of the second mechanical heat exchanger (24); the third connecting pipe (51) is provided with a third control valve (52); A fourth connecting pipe (61) is provided between the other end of the second heat pipe heat exchanger (12) and the other end of the second mechanical heat exchanger (24); the fourth connecting pipe (61) is provided with a fourth control valve (62).

2. The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration according to claim 1, characterized in that: A one-way valve (14) is provided between one end of the second heat pipe heat exchanger (12) and one end of the first heat pipe heat exchanger (11).

3. The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration according to claim 1, characterized in that: The throttling element (22) is an expansion valve.

4. The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration according to claim 1, characterized in that: The heat pipe control valve (13), the first control valve (32), the second control valve (42), the third control valve (52) and the fourth control valve (62) are all solenoid valves.

5. The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration according to claim 1, characterized in that: It also includes a first fan (71); the first fan (71), the first heat pipe heat exchanger (11) and the first mechanical heat exchanger (23) are arranged opposite to each other.

6. The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration according to claim 1, characterized in that: It also includes a second fan (72); the second fan (72), the second heat pipe heat exchanger (12) and the second mechanical heat exchanger (24) are arranged opposite to each other.

7. The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration according to claim 5, characterized in that: The first fan (71) is arranged on a side close to the first mechanical heat exchanger (23).

8. The air conditioning unit combining heat pipe refrigeration and mechanical refrigeration according to claim 6, characterized in that: The second fan (72) is arranged on a side close to the second mechanical heat exchanger (24).

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