CN206347798U - A kind of reverse defrost servicing unit of four-way valve - Google Patents
A kind of reverse defrost servicing unit of four-way valve Download PDFInfo
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- CN206347798U CN206347798U CN201621477226.1U CN201621477226U CN206347798U CN 206347798 U CN206347798 U CN 206347798U CN 201621477226 U CN201621477226 U CN 201621477226U CN 206347798 U CN206347798 U CN 206347798U
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- way valve
- temperature sensor
- temperature
- evaporator
- reverse defrost
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Abstract
The utility model discloses a kind of reverse defrost servicing unit of four-way valve, it is related to heat pump water-heating machine technical field, wherein described device includes：First temperature sensor, for detecting environment temperature；Second temperature sensor, the refrigerant temperature for detecting the evaporator inlet and/or exit；At heater, the drainpipe for being arranged at the evaporator, for being heated to the drainpipe；Controller, is connected respectively with first temperature sensor, the second temperature sensor and the heater, for controlling the heating devices heat according to the detected value of first temperature sensor and the second temperature sensor.By the utility model, the drainpipe of evaporator can be heated in time during the reverse defrost of and four-way valve relatively low in environment temperature, prevent its icing from blocking, i.e., preferable booster action is played to the reverse defrost process of four-way valve.
Description
Technical field
The utility model is related to heat pump water-heating machine technical field, and in particular to a kind of reverse defrost servicing unit of four-way valve.
Background technology
With the gradually accreditation in market, air source heat pump system has obtained unprecedented extensive popularization.In the north, winter conditions
During as little as subzero less than 15 DEG C of temperature, air-source system is in the case where winter makes outdoor temperature is relatively low, easy frosting, and defrost is not
To the greatest extent, particularly the most easy frost layer in outdoor heat exchanger (such as evaporator) bottom adds up, and forms rime ice, if defrosted not in time, meeting
Influence heating for residential area, the yield of hot water and the performance of heat pump can also be adversely affected, increase energy loss；Situation
Can occur shutdown phenomenon when serious.
The reverse defrost of four-way valve is a kind of conventional defrost technology employed in current air source heat pump system.Normally use
In the case of, the low temperature liquid refrigerant discharged from compressor flows into evaporator, and the low temperature liquid refrigerant absorbs in evaporator
Heat gasifies, the mist formation so that hydrone in air can liquefy when running into the evaporator of low temperature, or even when temperature is as little as subzero
Form frost.The reverse flow of refrigerant can be realized by the switching of four-way valve, that is, cause the high-temperature gas discharged from compressor
Refrigerant flows into evaporator, and high temperature liquid refrigerant heat release in evaporator is liquefied, so that frost absorbs on the outside of evaporator
Heat liquefies, i.e., by switching four-way valve so that refrigerant is positive, defrost is realized in reverse flow.
However, in defrost reverse using four-way valve, have substantial amounts of condensed water and produce, at low temperature, the condensation of generation
Water is easily frozen, and discharge outlet can be blocked for a long time, and serious meeting is produced on an evaporator climbs ice phenomenon, extreme influence unit quality,
Reduce unit efficiency.
Utility model content
In view of this, the utility model embodiment provides a kind of reverse defrost servicing unit of four-way valve, to solve environment
Temperature is relatively low, four-way valve reverse defrost when evaporator drainpipe easy ice blockage the problem of.
According in a first aspect, the utility model embodiment provide a kind of reverse defrost servicing unit of four-way valve, including：The
One temperature sensor, for detecting environment temperature；Second temperature sensor, for detecting the evaporator inlet and/or outlet
The refrigerant temperature at place；At heater, the drainpipe for being arranged at the evaporator, for being heated to the drainpipe；Control
Device, is connected respectively with first temperature sensor, the second temperature sensor and the heater, for according to described
First temperature sensor and the detected value of the second temperature sensor control the heating devices heat.
Alternatively, the heater is heating tape, and the heating tape is wound in the draining tube outer surface of the evaporator；
Described device also includes：In gate-controlled switch, the current supply circuit for being arranged on the heating tape, its control end connects with the controller
Connect, for controlling the current supply circuit of the heating tape to connect or disconnect.
Alternatively, first temperature sensor is arranged at the fin side of the evaporator.
Alternatively, the second temperature sensor is arranged at the evaporator inlet and/or the refrigerant coil in exit
Outer surface.
Alternatively, described device also includes：Input module, is connected with the controller, the institute for receiving user's input
State the environment temperature of heater unlatching.
Alternatively, described device also includes：Timer, is connected with the controller, for reversely changing in stopping four-way valve
Start timing during white process, the controller is additionally operable to control the heater to stop when timing time is more than preset time period
Only heat.
The reverse defrost servicing unit of four-way valve that the utility model embodiment is provided, is detected by the first temperature sensor
Environment temperature, the temperature of evaporator inlet and/or the refrigerant in exit is detected by second temperature sensor, is filled by heating
The drainpipe heating to evaporator is put, passes through detected value control of the controller according to the first temperature sensor and second temperature sensor
Refrigerating/heating apparatus is heated, so as to environment temperature is relatively low and draining during the reverse defrost of four-way valve in time to evaporator
Pipe is heated, and is prevented its icing from blocking, i.e., is played preferable booster action to the reverse defrost process of four-way valve.
Brief description of the drawings
Feature and advantage of the present utility model can be more clearly understood from by reference to accompanying drawing, accompanying drawing be it is schematical without
It is interpreted as carrying out any limitation to the utility model, in the accompanying drawings：
Fig. 1 shows the schematic diagram of the reverse defrost servicing unit of four-way valve according to the utility model embodiment；
Fig. 2 shows the flow chart of the reverse defrost householder method of four-way valve according to the utility model embodiment.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those skilled in the art are obtained under the premise of creative work is not made belongs to this reality
With novel protected scope.
Fig. 1 shows the schematic diagram of the reverse defrost servicing unit of four-way valve according to the utility model embodiment.According to Fig. 1
Described, the device includes the first temperature sensor 10, second temperature sensor 20, heater 30 and controller 40.
First temperature sensor 10, for detecting environment temperature.It is alternatively possible to which the first temperature sensor 10 is arranged at
The fin side of evaporator.Only when the temperature of the surroundings is low, evaporator during the reverse defrost of four-way valve can just be caused
Drainpipe, which freezes, to be blocked, when environment temperature is not low enough, without aiding in defrost.
Second temperature sensor 20, the refrigerant temperature for detecting evaporator inlet and/or exit.Alternatively, may be used
So that second temperature sensor 20 to be arranged to the refrigerant coil outer surface in evaporator inlet and/or exit.Normally using
In the case of, the low temperature liquid refrigerant discharged from compressor flows into evaporator, is flowed out after the gasification of evaporator absorbed inside heat
Under evaporator, i.e., normal service condition, the refrigerant temperature at evaporator inlet is relatively low, and the refrigerant temperature in exit is higher；
In defrost reverse using four-way valve, the high temperature liquid refrigerant discharged from compressor flows into evaporator, high-temperature gas refrigeration
Agent flows out evaporator in evaporator after heat release liquefaction, i.e., in the reverse defrost of four-way valve, the refrigerant temperature at evaporator inlet
Degree is higher, and the refrigerant temperature in exit is relatively low.Therefore by detecting that the refrigerant temperature of evaporator inlet and/or exit can
It is current whether in the reverse defrost state of four-way valve to judge.
Heater 30, is arranged at the drainpipe of evaporator, for being heated to drainpipe.Reversely change when using four-way valve
When white, have substantial amounts of condensed water and produce, at low temperature, the condensed water of generation is easily frozen, and discharge outlet can be blocked for a long time, set
Heater 30 at drainpipe can be heated to drainpipe, prevent from condensing water freezing, so that discharge outlet will not be blocked,
It is water discharge that can form frostization.
Controller 40, is connected, is used for respectively with the first temperature sensor 10, second temperature sensor 20 and heater 30
Heated according to the first temperature sensor 10 and the detected value of second temperature sensor 20 control heater 30.
The above-mentioned reverse defrost servicing unit of four-way valve, environment temperature is detected by the first temperature sensor, passes through the second temperature
The temperature of sensor detection evaporator inlet and/or the refrigerant in exit is spent, passes through drainpipe of the heater to evaporator
Heating, heating devices heat is controlled by controller according to the first temperature sensor and the detected value of second temperature sensor, from
And the drainpipe of evaporator can be heated in time during the reverse defrost of and four-way valve relatively low in environment temperature, prevent it from freezing
Block, i.e., preferable booster action is played to the reverse defrost process of four-way valve.
As a kind of optional embodiment, heater 30 is heating tape, and heating tape is wound in outside the drainpipe of evaporator
Surface, or heating tape can also be arranged inside the drainpipe of evaporator.The reverse defrost servicing unit of the four-way valve also includes
Gate-controlled switch, is arranged in the current supply circuit of heating tape, and its control end is connected with controller 40, the power supply for controlling heating tape
Loop is connected or disconnected.
Alternatively, the reverse defrost servicing unit of the four-way valve also includes input module 50, is connected with controller 40, for connecing
Receive the environment temperature that the heater 30 of user's input is opened.
Alternatively, the reverse defrost servicing unit of the four-way valve also includes timer 60, is connected with controller 40, for stopping
Only start timing during the reverse defrost process of four-way valve, controller 40 is additionally operable to control when timing time reaches and is more than preset time period
Heater 30 stops heating.
Fig. 2 shows the flow chart of the reverse defrost householder method of four-way valve according to the utility model embodiment.This method
The reverse defrost servicing unit of the four-way valve described in Fig. 1 can be used to realize, can also be realized by other devices.According to figure
Shown in 2, this method comprises the following steps：
S10：Obtain environment temperature.
S20：Obtain the refrigerant temperature at evaporator outlet.
S30：Judge whether environment temperature is less than the first temperature threshold.When environment temperature is less than the first temperature threshold, hold
Row step S40；Otherwise without operation.
Only when the temperature of the surroundings is low, the drainpipe of evaporator during the reverse defrost of four-way valve can be just caused to freeze
Block, when environment temperature is not low enough, without aiding in defrost.
S40：Judge whether the refrigerant temperature at evaporator outlet is less than second temperature threshold value.At evaporator outlet
When refrigerant temperature is less than second temperature threshold value, step S50 is performed；Otherwise without operation.
Only in the reverse defrost state of four-way valve, heater auxiliary defrost is just opened.Under normal usage, from
The low temperature liquid refrigerant of compressor discharge flows into evaporator, flows out evaporator after the gasification of evaporator absorbed inside heat, i.e.,
Under normal service condition, the refrigerant temperature at evaporator inlet is relatively low, and the refrigerant temperature in exit is higher；Using four-way
During the reverse defrost of valve, the high temperature liquid refrigerant discharged from compressor flows into evaporator, and the high temperature liquid refrigerant is in evaporator
Evaporator is flowed out after interior heat release liquefaction, i.e., in the reverse defrost of four-way valve, the refrigerant temperature at evaporator inlet is higher, outlet
The refrigerant temperature at place is relatively low.Therefore worked as by detecting that the refrigerant temperature of evaporator inlet and/or exit may determine that
It is preceding whether to be in the reverse defrost state of four-way valve.
S50：Control heater starts the drainpipe heating to evaporator.
The above-mentioned reverse defrost householder method of four-way valve, judges whether environment temperature is less than the first temperature threshold, i.e. environment temperature
Whether degree possesses ice-formation condition；And judge whether the refrigerant temperature at evaporator outlet is less than second temperature threshold value, i.e., whether
In the reverse defrost state of four-way valve；When environment temperature possesses ice-formation condition and defrost state reverse in four-way valve, control
Refrigerating/heating apparatus starts the drainpipe heating to evaporator., can and four-way relatively low in environment temperature by the utility model
The drainpipe of evaporator is heated in time during the reverse defrost of valve, prevents its icings from blocking, i.e., to four-way valve reverse defrost process
To preferable booster action.
As a kind of optional embodiment, also include after step S50：
S60：The refrigerant temperature at evaporator outlet is obtained in real time.
S70：Judge whether the refrigerant temperature at evaporator outlet is higher than the 3rd temperature threshold.At evaporator outlet
When refrigerant temperature is higher than three temperature thresholds, step S80 is performed；Otherwise without operation.3rd temperature threshold and second temperature
Threshold value can be same temperature value, such as 0 degree.
S80：Start timing.
S90：Judge whether timing time is more than preset time period.When timing time is more than preset time period, step is performed
Rapid S90；Otherwise without operation.
S100：Control heater stop heating.
As the simple deformation of step S20 one kind, can also be：Obtain the refrigerant temperature at evaporator inlet.
Correspondingly, step S40 is：Judge whether the refrigerant temperature at evaporator inlet is higher than the 4th temperature threshold.When
When refrigerant temperature at evaporator inlet is higher than four temperature thresholds, step S50 is performed.4th temperature threshold and the second temperature
It can be same temperature value to spend threshold value.
Correspondingly, step S60 is：The refrigerant temperature at evaporator inlet is obtained in real time.Correspondingly, step S70 is：Sentence
Whether the refrigerant temperature at disconnected evaporator inlet is less than the 5th temperature threshold.Refrigerant temperature at evaporator inlet is less than
During five temperature thresholds, step S80 is performed.5th temperature threshold and the 3rd temperature threshold can be same temperature value.
It should be added that, (rather than four-way valve under evaporator inlet described herein is normal service condition
During reverse defrost process) refrigerant enters the mouth of pipe of evaporator, and (rather than four-way valve is anti-under evaporator outlet is normal service condition
During to defrost process) refrigerant flow out evaporator the mouth of pipe.
Alternatively, the reverse defrost householder method of the four-way valve also includes：Real-time judge whether receive it is set, be used to
The environment temperature for controlling heater to open.During environment temperature when receiving set, heater and opening, by environment
Temperature is used as the first temperature threshold.
Alternatively, the reverse defrost householder method of the four-way valve also includes：Real-time judge whether receive it is set, be used to
Control the delay dwell time of the control heater after the reverse defrost process of four-way valve is stopped.When receive it is set,
To control in the delay dwell time of control heater after stopping the reverse defrost process of four-way valve, when delay is stopped
Between be used as preset time period.
Although being described in conjunction with the accompanying embodiment of the present utility model, those skilled in the art can not depart from this
Various modification can be adapted in the case of the spirit and scope of utility model and modification, and such modifications and variations are each fallen within by appended power
Profit is required within limited range.
Claims (6)
1. a kind of reverse defrost servicing unit of four-way valve, it is characterised in that including：
First temperature sensor, for detecting environment temperature；
Second temperature sensor, the refrigerant temperature for detecting evaporator inlet and/or exit；
At heater, the drainpipe for being arranged at the evaporator, for being heated to the drainpipe；
Controller, is connected, is used for respectively with first temperature sensor, the second temperature sensor and the heater
The heating devices heat is controlled according to first temperature sensor and the detected value of the second temperature sensor.
2. the reverse defrost servicing unit of four-way valve according to claim 1, it is characterised in that the heater is heat tracing
Band, the heating tape is wound in the draining tube outer surface of the evaporator；Described device also includes：
In gate-controlled switch, the current supply circuit for being arranged on the heating tape, its control end is connected with the controller, for controlling
The current supply circuit for stating heating tape is connected or disconnected.
3. the reverse defrost servicing unit of four-way valve according to claim 1, it is characterised in that first temperature sensor
It is arranged at the fin side of the evaporator.
4. the reverse defrost servicing unit of four-way valve according to claim 1, it is characterised in that the second temperature sensor
It is arranged at the refrigerant coil outer surface in the evaporator inlet and/or exit.
5. the reverse defrost servicing unit of four-way valve according to claim 1, it is characterised in that also include：Input module, with
The controller connection, for receiving the environment temperature that the heater of user's input is opened.
6. the reverse defrost servicing unit of four-way valve according to claim 1, it is characterised in that also include：Timer, with institute
Controller connection is stated, for starting timing in the reverse defrost process of stopping four-way valve, the controller is additionally operable in timing
Between control the heater stop to heat when being more than preset time period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621477226.1U CN206347798U (en) | 2016-12-30 | 2016-12-30 | A kind of reverse defrost servicing unit of four-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621477226.1U CN206347798U (en) | 2016-12-30 | 2016-12-30 | A kind of reverse defrost servicing unit of four-way valve |
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| Publication Number | Publication Date |
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| CN206347798U true CN206347798U (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621477226.1U Active CN206347798U (en) | 2016-12-30 | 2016-12-30 | A kind of reverse defrost servicing unit of four-way valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705545A (en) * | 2016-12-30 | 2017-05-24 | 浙江正理生能科技有限公司 | Four-way valve reverse defrosting auxiliary device and method |
-
2016
- 2016-12-30 CN CN201621477226.1U patent/CN206347798U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705545A (en) * | 2016-12-30 | 2017-05-24 | 浙江正理生能科技有限公司 | Four-way valve reverse defrosting auxiliary device and method |
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