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Partial heat recovery control method and system

A heat recovery and water pump technology, which is applied in the field of some heat recovery control methods and systems, can solve the problems of liquid accumulation in the shell and tube of the heat recovery device, affecting the comfort of the unit, and being unfavorable for large-scale promotion and sales.

Active Publication Date: 2015-03-04
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The cost of full heat recovery units is often high, which is not conducive to large-scale promotion and sales
Some heat recovery units are simple in structure and low in cost, but after some heat recovery functions are turned on, it is easy to cause frequent low-voltage protection, secondary evaporation of the evaporator, and fluid accumulation in the shell and tube of the heat recovery unit, which greatly affects the unit. The comfort of operation, which in turn leads to a significant reduction in the reliability of the unit

Method used

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  • Partial heat recovery control method and system
  • Partial heat recovery control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment 1 discloses a partial heat recovery control method, refer to figure 2 , the method may include the following steps:

[0061] S101: When the heat recovery water pump is in the off state, obtain in real time the running time of the continuous operation of the compressor, obtain the temperature of the water in the heat recovery water tank in real time, and obtain the temperature of the heat recovery water inlet in real time.

[0062] Wherein, the heat recovery water pump is installed on the water inlet pipeline between the heat recovery water tank and the heat recovery device.

[0063] S102: When the running time, the temperature of the water in the heat recovery water tank, and the temperature of the heat recovery water inlet meet the preset direct start conditions, issue a first control command to control the heat recovery water pump to be directly turned on.

[0064] S103: When the running time, the temperature of the water in the heat recovery water t...

Embodiment 2

[0074] In the second embodiment, refer to image 3 , the method may also include the following steps:

[0075] S104: When the heat recovery water pump is in the off state, if the running time, the temperature of the water in the heat recovery water tank, and the temperature of the heat recovery water inlet do not meet the direct start condition and the standby start condition, maintain the heat recovery water pump Disabled.

[0076] When t, T 箱 and T 进 If the direct opening condition or standby opening condition is not met, it means that the current unit does not have the sensible heat exchange capacity required for heat recovery, or the current temperature of the water in the water tank is higher than a certain value, and it can be directly used by the user without further processing. heating, so that in this case, it is not necessary to turn on the heat recovery water pump for heat recovery.

Embodiment 3

[0078] In the third embodiment, refer to Figure 4 , the method may also include the following steps:

[0079] S401: When the heat recovery water pump is on, determine whether the unit meets the following conditions: the compressor is off or the T 箱 >T 设 .

[0080] Among them, T 设 is the minimum threshold value of water temperature set.

[0081] S402: If the judgment result is yes, control the heat recovery water pump to turn off;

[0082] S403: If the determination result is negative, keep the heat recovery water pump in an on state.

[0083] When the heat recovery water pump is turned on, if the compressor is turned off, the unit is no longer capable of heat recovery, and the heat recovery water pump needs to be turned off at this time; if T 箱 >T 设 , then the water temperature of the water tank has reached the user's use requirements, and it is not necessary to continue to heat it with heat recovery, so that the heat recovery water pump can be turned off to stop heat ...

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Abstract

The invention provides a partial heat recovery control method and system. According to the partial heat recovery control method and system, directly starting conditions for directly starting a heat recovery water pump(without causing the problems such as low voltage protection) are formed on the basis of the pre-research on heat recovery conditions easily causing the problems such as low voltage protection, an air conditioner is set in a standby state (for avoiding the problems such as low voltage protection of a compressor), and then standby starting conditions for starting the heat recovery water pump are formed. On the basis of the formed starting conditions, the duration of the continuous operation of the compressor, the temperature of the water in a heat recovery water tank and the temperature of the inlet water of the heat recovery water tank are obtained in real time, and corresponding directly opening or standby opening control is performed on the heat recovery water pump when all obtained parameter data meets the directly opening conditions or the standby opening conditions. By means of the partial heat recovery control method and system, the opening of the heat recovery water pump is controlled according to different conditions, so that the reasonable control on the heat recovery of units is achieved, the occurrence of the problems such as low voltage protection is avoided, and the reliability of the units is improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioner heat recovery, and in particular relates to a partial heat recovery control method and system. Background technique [0002] At present, the heat recovery function of air conditioners mainly includes two forms: full heat recovery and partial heat recovery. Correspondingly, air conditioning units include full heat recovery units and partial heat recovery units. [0003] The cost of the total heat recovery unit is often high, which is not conducive to large-scale promotion and sales. Some heat recovery units have a simple structure and low cost, but when some heat recovery functions are turned on, it is easy to cause frequent low-voltage protection, secondary evaporation of the evaporator, and fluid accumulation in the shell and tube of the heat recovery unit, which greatly affects the unit. The comfort of operation, which in turn leads to a significant reduction in the reliability of the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B29/00F25B49/02
CPCF25B29/003F25B49/022
Inventor 陈锡保刘刚峰程琦陈培生钟海玲黄凯亮徐萃端王建凯吉剑林
Owner GREE ELECTRIC APPLIANCES INC
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