CN201126287Y

CN201126287Y - Defrosting device of heat pump units

Info

Publication number: CN201126287Y
Application number: CNU2007200604242U
Authority: CN
Inventors: 汪永斌
Original assignee: Dongguan Tiger Refrigeration & Heation Machine Co Ltd
Current assignee: Dongguan Tiger Refrigeration & Heation Machine Co Ltd
Priority date: 2007-11-30
Filing date: 2007-11-30
Publication date: 2008-10-01
Anticipated expiration: 2017-11-30

Abstract

The utility model relates to a defrosting device for hot pump group. The hot pump group comprises a compressor, a heat exchanger, an expanding valve, an evaporator and pipes. The pipes are orderly connected to the compressor, heat exchanger, expanding valve and evaporator to form a pipe loop; the defrosting device for hot pump group is a bypassing pipe path; the bypassing pipe path connects the pipe path between the compressor and the heat exchanger and the pipe between the expanding valve and the evaporator, which is connected with an electromagnetic valve; the electromagnetic valve is connected to a low-pressure controller via the lead; the low-pressure controller is arranged on the pipe path between the compressor and the evaporator; because of the bypassing pipe structure, the device; the device rationally diffuses and uses the system energy and controls the electromagnetic valve via the low-pressure controller; the device also can adjust the pressure and temperature of the cold medium entered in the evaporator in the pressure feedback form, so that the device has high efficiency for defrosting and the effect of reducing the energy consumptions, effectively enhancing the heat exchanging efficiency and the working environment.

Description

A kind of defroster of source pump

Technical field

The utility model relates to the cold operation and the Defrost technology field of source pump.

Background technology

Source pump is widely used in the most of area of China, but the easy frosting of evaporimeter of source pump when temperature is low, flow resistance when the formation of frost layer has increased air communication pervaporation device, strengthened the heat transfer resistance between evaporimeter and air, thereby influenced the heat exchange efficiency of evaporimeter, make the efficient of source pump reduce, shorten service life, so source pump must prevent frosting when moving under the lower environment of temperature.

At present, in existing Defrost technology, traditional method is by the cross valve reverse cycle defrost, this method is by the switching of refrigerating and heating systems, reach the defrosting effect of evaporimeter, but owing to begin to the defrosting ending phase in defrosting, cross valve to move twice, simultaneity factor also will rebulid the balance of pressure and temperature, has not only caused a large amount of losses of energy but also system's defrosting time long.The work of also useful temperature sense control heating resistor is to reach defrosting effect, and there are problems such as defrosting efficiency is low equally in this technology.

The utility model content

The purpose of the utility model product is to overcome the weak point that existing product exists, and provides a kind of defrosting efficiency high and minimizing energy loss, improves the source pump defroster that source pump heat is changed efficient and working environment.

To achieve these goals, the technical scheme that the utility model adopted is: a kind of defroster that source pump is provided, described source pump comprises compressor, heat exchanger, expansion valve, evaporimeter and pipeline, pipeline connects compressor, heat exchanger, expansion valve, evaporimeter successively, forms pipeline loop; The defroster of described source pump is a bypass pipe road, and pipeline between this bypass line connection compressor and the heat exchanger and the pipeline between expansion valve and the evaporimeter are connected to the bypass defrost magnetic valve in the described bypass line.

Described bypass defrost magnetic valve connects a low pressure controller by lead, and this low pressure controller is arranged on the pipeline between compressor and the evaporimeter.

Adopt the source pump defroster of technique scheme, owing to adopted the by-pass line structure, reasonably system capacity is shunted and utilized, and by of the control of low pressure controller to the bypass defrost magnetic valve, can regulate the pressure and temperature of the refrigerant that enters evaporimeter with the form of pressure feedback in real time, reach defrosting effect, therefore have the effect of defrosting efficiency height and minimizing energy loss, improved the heat of source pump effectively and changed efficient and working environment.

Description of drawings

Fig. 1 is an operation principle picture frame schematic diagram of the present utility model.

Among the figure: 1, compressor, 2, pipeline one, 3, heat exchanger, 4, expansion valve, 5, bypass line, 6, pipeline two, 7, evaporimeter, 8, the bypass defrost magnetic valve, 9, lead, 10, the low pressure controller, 11, pipeline three.

The specific embodiment

The utility model is described in more detail below in conjunction with accompanying drawing.

With reference to Fig. 1, the defroster of this kind source pump, its source pump comprises compressor 1, heat exchanger (being condenser) 3, expansion valve 4, evaporimeter 7 and pipeline, and pipeline connects compressor 1, heat exchanger 3, expansion valve 4, evaporimeter 7 successively, forms pipeline loop; The defroster of described source pump is a bypass pipe road 5, pipeline between these bypass line 5 connection compressors 1 and the heat exchanger 3 is that the pipeline between pipeline 1 and expansion valve 4 and the evaporimeter 7 is a pipeline 26, is connected to bypass defrost magnetic valve 8 in the described bypass line 5.This bypass defrost magnetic valve 8 connects a low pressure controller 10 by lead 9, and the pipeline that this low pressure controller 10 is arranged between compressor 1 and the evaporimeter 7 is on the pipeline 3 11.

When source pump heats running, compressor 1 sucks the cold media gas of the low-temp low-pressure of flash-pot 7, after being compressed into the cold media gas of HTHP, drain into heat exchanger 3, the cold water heat exchanger 3 of flowing through simultaneously, take away the cold media gas liberated heat of HTHP, formation hot water flows out, make cold media gas be condensed into cryogenic high pressure liquid, this low-temp low-pressure refrigerant liquid passes through expansion valve 4 again, and throttling becomes the refrigerant liquid of low-temp low-pressure, and the refrigerant liquid of low-temp low-pressure absorbs the heat from outdoor air in evaporimeter 7 then, be evaporated to the cold media gas of low-temp low-pressure, the cold media gas of low-temp low-pressure is sucked by compressor 1 again.So compression-condensation-throttling-evaporation circulates repeatedly, and cold water continues to flow and forms hot water through heat exchanger 3, thereby obtains heating effect.

When evaporimeter 7 during because of the external factor frosting, flow resistance when the frost layer has increased air communication pervaporation device 7, strengthened the heat transfer heat group between evaporimeter 7 and air, made evaporimeter 7 reduce, influenced the heat exchange efficiency of system to the pressure and temperature of the low-temp low-pressure cold media gas between the compressor 1.At this moment, be arranged on the variation that low pressure controller 10 on the pipeline 3 11 detects pressure, control bypass defrost magnetic valve 8 starts, connect by-pass line 5, make script be discharged to the part HTHP cold media gas of heat exchanger 3 by pipeline 1 via compressor 1, enter pipeline 26 through by-pass line 5 and enter evaporimeter 7 again, under the effect of this part HTHP cold media gas, most of frost on the evaporimeter 7 is removed, the circulation of extraneous air and evaporimeter 7 and the recovery of conducting heat are normal, low-temp low-pressure cold media gas in the pipeline 3 11 recovers the pressure under the normal operating conditions simultaneously, after low pressure controller 10 detects the variation of this pressure, control bypass defrost magnetic valve 8 cuts out, and disconnects by-pass line 5, makes source pump recover normal heating operation.So, produce the situation of frostings at evaporimeter 7, source pump just can be under this defroster effect automatic defrosting, reach the high and minimizing energy loss of defrosting efficiency, improve the beneficial effect that source pump heat is changed efficient and working environment.

Claims

1. a kind of defroster of source pump, described source pump comprises compressor, heat exchanger, expansion valve, evaporimeter and pipeline, pipeline connects compressor, heat exchanger, expansion valve, evaporimeter successively, form pipeline loop, it is characterized in that: the defroster of described source pump is a bypass pipe road, pipeline between this bypass line connection compressor and the heat exchanger and the pipeline between expansion valve and the evaporimeter are connected to magnetic valve in the described bypass line.

2. a kind of defroster of source pump according to claim 1, it is characterized in that: described magnetic valve connects a low pressure controller by lead, and this low pressure controller is arranged on the pipeline between compressor and the evaporimeter.