Coiled tube anti-frost-cracking system and method used for air conditioner with double heat sources

An air-conditioning coil, dual heat source technology, applied in air-conditioning systems, household heating, heating methods, etc., can solve the problems of wasting energy, freezing cracks of fan coils, etc., and achieve the effect of preventing coils from freezing and cracking

Active Publication Date: 2016-01-06
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a coil antifreeze cracking system and method for dual heat source air conditione

Method used

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  • Coiled tube anti-frost-cracking system and method used for air conditioner with double heat sources
  • Coiled tube anti-frost-cracking system and method used for air conditioner with double heat sources
  • Coiled tube anti-frost-cracking system and method used for air conditioner with double heat sources

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Such as figure 2 As shown, a coil anti-freeze cracking method for a dual heat source air conditioner, when the air conditioner is in heating mode, the controller performs the following steps:

[0055] Step 1: Close the drain valve, open the water inlet valve, water outlet valve and air valve;

[0056] Step 2: The water inlet temperature sensing device detects the water temperature T of the water inlet pipeline进 , the outlet water temperature sensing device detects the water temperature T of the water pipeline 出 ;

[0057] Step 3: Compare T 进 and T 出 ;

[0058] Step 4: When T 进 and T 出 When the difference between them is less than a predetermined threshold, preferably after a period of time, the gas valve is closed.

[0059] Preferably, the predetermined threshold is not greater than 2°C, specifically, may be 2°C.

Embodiment 2

[0061] Such as image 3 As shown, a coil antifreeze cracking method for dual heat source air conditioners, when the controller receives a drainage signal, the controller performs the following steps:

[0062] Step 102: close the water inlet valve and the water outlet valve, open the drain valve and the air valve;

[0063] Step 103: The water inlet temperature sensing device detects the water temperature T of the water inlet pipeline 进 , the outlet water temperature sensing device detects the water temperature T of the water pipeline 出 ;

[0064] Step 104: Compare T 进 , T 出 and ambient temperature T 环 ;

[0065] Step 105: If T 进 =T 出 =T 环 , preferably after a period of time, it is determined that the water in the air conditioning coil has been drained, and the drain valve and the air valve are closed.

[0066] Preferably, the drainage signal is manually input by the user or automatically set and input by the coil antifreeze cracking system for dual heat source air con...

Embodiment 3

[0068] Such as Figure 4 As shown, a coil anti-freeze cracking method for a dual heat source air conditioner, when the internal unit of the air conditioner is shut down or the cooling mode is running, the controller performs the following steps:

[0069] Step 201: The water inlet temperature sensing device detects the water temperature T of the water inlet pipeline 进 , the outlet water temperature sensing device detects the water temperature T of the water pipeline 出 ;

[0070] Step 202: Compare T 进 and T 出 ;

[0071] Step 203: When T 进 ≤ and T 出 When ≤ the predetermined threshold, preferably after a period of time, a drain signal is sent to control the coil antifreeze cracking system used for dual heat source air conditioners to automatically drain the water in the coil.

[0072] Preferably, the predetermined threshold is not greater than 2°C, specifically, may be 2°C.

[0073] Further, when the controller sends a drain signal, the above-mentioned coil antifreeze crac...

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PUM

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Abstract

The invention provides a coiled tube anti-frost-cracking system used for an air conditioner with double heat sources. The coiled tube anti-frost-cracking system comprises an air conditioner coiled tube, a water inlet pipeline, a water outlet pipeline, and further comprises a dewatering branch, a ventilating branch, an inlet water temperature sensing device, an outlet water temperature sensing device and a controller, wherein the dewatering branch is arranged near an inlet of an air conditioner coiled tube; the ventilating branch is arranged near an outlet of the air conditioner coiled tube; the inlet water temperature sensing device is arranged near a water inlet pipeline at an inlet of the air conditioner coiled tube; the outlet water temperature sensing device is arranged on the ventilating branch; the controller is used for controlling, according to a user's instruction and a temperature measured by the inlet water temperature sensing device and the outlet water temperature sensing device, water feeding, water discharging, dewatering and gas exhausting. According to the coiled tube anti-frost-cracking system and the coiled tube anti-frost-cracking method for the air conditioner with double heat sources as well as the air conditioner with double heat sources, the dewatering branch, a dewatering valve, a gas exhausting branch and a gas valve are additionally arranged to timely exhaust water in a fan coiled tube, so that the coiled tube frost-cracking is effectively prevented. Meanwhile, during operation of a heating mode, water in the coiled tube is not heated for a second time, so that energy-saving effect can be achieved.

Description

technical field [0001] The invention relates to a coil antifreeze cracking system and method for a dual heat source air conditioner and a dual heat source air conditioner, belonging to the technical field of air conditioners. Background technique [0002] The heat exchanger of the dual heat source air conditioner indoor unit usually includes an independent water system and refrigerant system. When cooling, the refrigerant system operates, but when heating, there are three heating methods: refrigerant system heating, water system heating, refrigerant system and water system heating together. Fan coil units are usually used in water systems. Its working principle is to continuously recirculate the air in the room where the unit is located, so that the air is cooled (heated) after passing through the cold water (hot water) coil, that is, the external cold or heat source is used. The room can be directly cooled or heated to keep the room temperature constant. The fan coil unit...

Claims

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Application Information

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IPC IPC(8): F24F11/02F24F11/00F24F13/00
CPCF24F11/30F24F11/70F24F11/89F24F13/00F24F2110/00F24F2221/52
Inventor 祝盼盼熊建国杨智峰焦华超张红梅
Owner GREE ELECTRIC APPLIANCES INC
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