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Dual-purpose multiple operating mode self-defrosting type heat pump air-conditioner and automatic defrosting process thereof

A technology of heat pump air conditioning and multi-working conditions, applied in heat pumps, air conditioning systems, heating methods, etc., can solve the problem of inability to judge the frosting of outdoor heat exchangers in time, affect the output temperature of indoor heat exchangers, and the inability to quickly clear outdoor heat exchangers Frosting and icing problems, to achieve the effect of improving heating effect, convenient management, and simple design structure

Inactive Publication Date: 2010-10-06
孟凡正
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual air conditioner in the entire defrosting operation stage is working under cooling conditions, which affects the output temperature of the indoor heat exchanger, and it is impossible to judge in time whether the frost on the outdoor heat exchanger has been completely removed by simply measuring the temperature. For large and medium-sized air conditioners, it is also impossible to quickly remove the frost and ice on the outdoor heat exchanger

Method used

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  • Dual-purpose multiple operating mode self-defrosting type heat pump air-conditioner and automatic defrosting process thereof
  • Dual-purpose multiple operating mode self-defrosting type heat pump air-conditioner and automatic defrosting process thereof
  • Dual-purpose multiple operating mode self-defrosting type heat pump air-conditioner and automatic defrosting process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] use figure 1 The system configuration shown, figure 2 The electronic control system shown, image 3 The line switching device shown and Figure 5 Controllable throttling shown.

[0071] (1) Normal cooling conditions:

[0072] When the heat pump air conditioner works under normal refrigeration conditions, the first heat exchanger acts as a condenser, the second heat exchanger acts as an evaporator, the control valves F1 and F4 in the four-way switching valve group are opened, and the control valves in the pipeline switching device Valves F11, F15 and F16 are opened, control valve f6 in the controllable throttling device is opened, and other control valves are closed.

[0073] Refrigerant is supplied from compressor 1 at end a of refrigerant supply pipe → control valve F4 → end h of refrigerant heat exchange pipe 7 of the first heat exchanger → end g of refrigerant heat exchange pipe 7 of first heat exchanger → control valve F16→end j of waste heat tracing pipe 8 of...

Embodiment 2

[0091] use figure 1 The system configuration shown, figure 2 The electronic control system shown, image 3 The line switching device shown and Figure 4 Controllable throttling shown.

[0092] (1) Backflow defrosting working conditions:

[0093] When the heat pump air conditioner works in the reflux defrosting condition, the first heat exchanger acts as an evaporator, the second heat exchanger acts as a condenser, the control valves F2 and F3 in the four-way switching valve group are opened, and the control valves in the pipeline switching device The control valves F11, F15 and F16 are opened, the control valves f3 and f4 in the controllable throttling device are opened, and the other control valves are closed. The equivalent structure and pipeline connection relationship are as follows Figure 7 shown.

[0094] Refrigerant is from compressor 1 refrigerant supply pipe a end → control valve F2 → second heat exchanger 4 refrigerant heat exchange pipe t end → second heat ex...

Embodiment 3

[0103] use figure 1 The system configuration shown, figure 2 The electronic control system shown, image 3 The line switching device shown and Figure 4 or Figure 5 Controllable throttling shown.

[0104] (1) Backflushing fast defrosting working condition:

[0105] When the heat pump air conditioner works in the back flushing fast defrosting condition, the control valves F1 and F4 in the four-way switching valve group are opened, the control valves F11, F15 and F16 in the pipeline switching device are opened, and the control valves in the throttling device are Control valve f3, f4 (controllable throttling device adopts Figure 5 structure) or f6 (controllable throttling device adopts Figure 4 The structural form) is opened, and the rest of the control valves are closed. The equivalent structure and pipeline connection relationship are as follows: Figure 8 shown.

[0106] Refrigerant is supplied from the refrigerant supply pipe a of compressor 1→control valve F4→ref...

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Abstract

The invention relates to a dual-purpose multiple operating mode self-defrosting type thermal pumping air-conditioning unit which comprises a compressor, a four-way switching valve set, a second heat exchanger, a liquid return cushioning device and a first heat exchanger having a draught fan, wherein a residual heat tracer pipe, a temperature monitoring apparatus and a humidity supervisory instrument are arranged on the first heat exchanger, a pipe line switching device, a controlled throttle apparatus a temperature and moisture detecting device, a four-way switching valve set, a draught fan, and the electrically controlled portion of the controlled throttle device are arranged in the refrigerant pipe connection between the first and the second heat exchanger. The invention also discloses the automatic defrosting method for the thermal pumping air-conditioning unit which can substantially improve the heat-production performance of the heat pump air-conditioning unit and realize automatic defrosting.

Description

technical field [0001] The invention belongs to the field of combined heating and cooling systems, in particular to a compression heat pump air conditioner. Background technique [0002] Now it is widely used in various large-scale central air-conditioning devices for centralized cooling and heating of office buildings, hotels and residential quarters in northern my country. Usually, large and medium-sized compression refrigeration units complete their refrigeration functions; because of the existing large and medium-sized compression refrigeration units Heating cannot be performed (the flow direction of the refrigerant is difficult to control arbitrarily). In winter, the above-mentioned large-scale air-conditioning devices can only complete the heating function of the air-conditioning system through an external heating source (usually using steam heating), resulting in low utilization of refrigeration equipment , high operating costs for users. [0003] In the Chinese patent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B47/02F24F3/06F25B30/02
Inventor 孟凡正孟凡伟孟莹莹孟磊李海然高令民
Owner 孟凡正
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