CN209655615U - A kind of non-stop-machine heat pump air conditioning system of low temperature - Google Patents
A kind of non-stop-machine heat pump air conditioning system of low temperature Download PDFInfo
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- CN209655615U CN209655615U CN201920232390.3U CN201920232390U CN209655615U CN 209655615 U CN209655615 U CN 209655615U CN 201920232390 U CN201920232390 U CN 201920232390U CN 209655615 U CN209655615 U CN 209655615U
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Abstract
The utility model relates to air-conditioning technical fields, more particularly to a kind of non-stop-machine heat pump air conditioning system of low temperature, including condenser, throttling set, evaporator and compressor, the outlet of compressor passes sequentially through condenser, it is connect after throttling set and evaporator with the entrance of compressor, to constitute heat pump circuit, it is characterized in that, heat pump air conditioning system further includes the high-low pressure by-pass collar for adjusting heat pump circuit pressure difference, compared with prior art, by in two working ends of compressor high-low pressure by-pass collar in parallel, utilize the pressure difference at high-low pressure by-pass collar balance compressor both ends, guarantee that compressor can also be operated normally in the case where environment temperature is too low, it solves the problems, such as additionally put into other heating equipment auxiliary heatings to increase cost, simplify set structure.
Description
Technical field
The utility model relates to air-conditioning technical fields, and in particular to a kind of non-stop-machine heat pump air conditioning system of low temperature.
Background technique
Traditional air energy heat pump heating/heat-supply metering charge, mainly by compressor 1, evaporator 5, condenser 3, section
Device 4, the composition of four-way valve 2 are flowed, as shown in 1 conventional air energy heat pump system of annex map, the height of the discharge of compressor 1 when system heats
Super pressure-high temperature refrigerant heat is released to using side in condenser 3, and refrigerant is becoming low temperature after the throttling of throttling set 4
Low pressure two-phase state, the heat absorbed in air in evaporator 5 become overheated gas, return and compress in compressor 1, so
Complete heating circulation.
Currently in the solution that northern fire coal causes environmental pollution, air-source heating heating is just becoming a kind of and is preferentially solving
Certainly scheme, but phenomenon low in face of north of china in winter environment temperature simultaneously, the use scope of compressor become limitation air source heat pump
A key factor: environment temperature is lower, and the heat absorption of air-cooled evaporator is more difficult, and compressor low pressure is lower, compressor
Evaporating temperature be more than the range of operation of compressor design and occur limiting or protect (evaporating temperature is too low cause to be formed it is enough
Low pressure boil-off gas, the low pressure limit of compressor start cannot be reached), heat pump circuit low pressure is too low, eventually leads to
Unit is unable to operate normally under low ambient temperature.
Utility model content
The purpose of this utility model is that aiming at the shortcomings in the prior art, and it is simple, at low cost to provide a kind of structure
The non-stop-machine heat pump air conditioning system of low temperature.
The purpose of this utility model is achieved through the following technical solutions: a kind of non-stop-machine heat pump air conditioner system of low temperature of the application
System, including condenser, throttling set, evaporator and compressor, the outlet of compressor pass sequentially through condenser, throttling set and steaming
It is connect after hair device with the entrance of compressor, to constitute heat pump circuit, heat pump air conditioning system further includes pressing for adjusting heat pump circuit
The high-low pressure by-pass collar of difference.
Wherein, the heat pump air conditioning system further includes four-way valve, and the outlet of compressor passes sequentially through the of the four-way valve
One group interface, condenser, throttling set, evaporator, four-way valve the second group interface after connect with the entrance of compressor.
Wherein, the high-low pressure by-pass collar includes controller and the shut-off valve being electrically connected with the controller or adjusting
By the outlet of pipeline and compressor, the shut-off valve or regulating valve go out the entrance of valve, the shut-off valve or regulating valve
Mouth is connected to by pipeline with the entrance of compressor.
Wherein, further include environment temperature sensor for detecting environment temperature, the environment temperature sensor with it is described
Controller communication connection presets minimum environment temperature and the currently running pressure of compressor and is less than compressor when environment temperature is less than
When the minimum pressure for allowing to run, controller controls shut-off valve or regulating valve to opening state.
Wherein, when environment temperature be greater than preset minimum environment temperature and the currently running pressure of compressor greater than compressor permit
When the minimum pressure run perhaps, controller controls shut-off valve or regulating valve to closed state.
Wherein, the throttling set be heating power expansion valve, electric expansion valve or capillary in one of which or two kinds with
On combination.
The utility model has the beneficial effects that a kind of non-stop-machine heat pump air conditioning system of low temperature of the application, with the prior art
It compares, by utilizing high-low pressure by-pass collar balance pressure in two working ends of compressor high-low pressure by-pass collar in parallel
The pressure difference at contracting machine both ends guarantees that compressor can also be operated normally in the case where environment temperature is too low, and solving needs additionally
The problem of other heating equipment auxiliary heatings are put into increase cost simplifies set structure.
Detailed description of the invention
Using attached drawing, the utility model is described in further detail, but the embodiment in attached drawing is not constituted to the utility model
Any restrictions for those of ordinary skill in the art without creative efforts, can also be according to following attached
Figure obtains other attached drawings.
Fig. 1 is the schematic diagram of heat pump air conditioning system in the prior art.
Fig. 2 is a kind of schematic diagram of the non-stop-machine heat pump air conditioning system of low temperature of the utility model.
Detailed description of the invention: compressor 1, four-way valve 2, condenser 3, throttling set 4, evaporator 5, high-low pressure by-pass collar 6.
Specific embodiment
The utility model is further described with the following Examples.
The specific embodiment of the non-stop-machine heat pump air conditioning system of a kind of low temperature of the utility model, as shown in Fig. 2, including
The outlet of condenser 3, throttling set 4, evaporator 5, compressor 1 and four-way valve 2, compressor 1 passes sequentially through the first of four-way valve 2
Group interface A, B, condenser 3, throttling set 4, evaporator 5, four-way valve 2 second group interface D, C after connect with the entrance of compressor 1
It connects, to constitute heat pump circuit, heat pump air conditioning system further includes the high-low pressure by-pass collar 6 for adjusting heat pump circuit pressure difference, high
One end of low pressure by-pass collar 6 and the outlet of compressor 1, the other end of high-low pressure by-pass collar 6 and the entrance of compressor 1
Connection.Specifically, high-low pressure by-pass collar 6 includes controller and the shut-off valve being electrically connected with the controller or regulating valve, shut-off valve
Or regulating valve is connected to the entrance and exit of compressor 1 respectively by pipeline；In addition to this, high-low pressure by-pass collar 6 can be with
It is the shut-off valve or regulating valve of unadjustable flow, is also possible to the adjustable flow adjusting structure of flow, can also be normal open type
Mechanism.It should be noted that removal four-way valve 2 is the heat pump system of single heat in this implementation, and include in the present embodiment
Four-way valve 2 is to realize refrigeration and heat difunctional heat pump air conditioning system, and the high-low pressure by-pass collar of the present embodiment can as a result,
Enough list hot systems that are suitable for can also be suitable for cold-heating system.
The heat pump air conditioning system of the present embodiment further includes the environment temperature sensor for detecting environment temperature, environment temperature
Sensor and controller communicate to connect.
In the present embodiment, in order to improve the utilization efficiency of the energy, throttling set 4 is heating power expansion valve, electric expansion valve
Or one of or two or more combination in capillary.
When heating mode, the gaseous refrigerant of low-temp low-pressure is compressed to the gaseous state system of high temperature and pressure after compressor 1
Cryogen, the gaseous refrigerant of high temperature and pressure in the outlet (high-pressure side) of compressor 1 after first group of outlet A, B of four-way valve 2,
After the heat exchange of condenser 3, refrigerant temperature reduces the gaseous refrigerant of high temperature and pressure, becomes the liquid refrigerant of high pressure low temperature,
For the liquid refrigerant of high pressure low temperature after throttling set 4 is throttled, liquid refrigerant becomes gas-liquid two-phase cold-producing medium, then passes through
After being exchanged heat by evaporator 5, by second group of entrance D, C of four-way valve 2, refrigerant flows back to the entrance (low pressure of compressor 1
Side), continue the compression recycled next time；Minimum environment temperature and compressor 1 are preset currently when actual ambient temperature is less than
When the pressure of operation is less than the minimum pressure that compressor 1 allows to run, controller controls shut-off valve or regulating valve to opening state,
Partial high pressure refrigerant is bypassed to low-pressure side by high-low pressure by-pass collar 6, improves low pressure, low pressure is made to be maintained at pressure
Within contracting machine range of operation, to realize that unit at low ambient temperatures still can normal heating operation.When environment temperature is greater than
When presetting minimum environment temperature and the currently running pressure of compressor 1 and being greater than the minimum pressure that compressor 1 allows to run, controller
Shut-off valve or regulating valve are controlled to closed state.
The non-stop-machine heat pump air conditioning system of a kind of low temperature of the present embodiment, compared with prior art, by compressor 1
Two working ends high-low pressure by-pass collar 6 in parallel, the low pressure of 1 inlet of compressor is improved using high-low pressure by-pass collar 6
Pressure guarantees that compressor 1 can also be operated normally in the case where environment temperature is too low, other heatings need to additionally be put by solving
The problem of equipment auxiliary heating is to increase cost simplifies set structure.
A kind of control method of the non-stop-machine heat pump air conditioning system of low temperature of the utility model, includes the following steps, step
A obtains the pressure value that outdoor environment temperature and compressor 1 are run；Step b, according to outdoor environment temperature acquired in step a
And the pressure value that compressor 1 is run judges whether that opening high-low pressure by-pass collar 6 enters step c if met, if not
Meet, then return step a；Step c opens shut-off valve or regulating valve by controller, and the refrigerant for exporting compressor 1 is direct
It is bypassed to the entrance of compressor 1, enters step d；Step d obtains the pressure that outdoor environment temperature and compressor 1 are run again
Value；Step e judges whether to close height according to the pressure value that outdoor environment temperature and compressor 1 acquired in step d are run
By-pass collar 6 is pressed to close high-low pressure by-pass collar 6 if met, if not meeting, return step d.
In stepb, minimum environment temperature T and the currently running pressure P1 of compressor 1 are preset when environment temperature T1 is less than
When allowing the minimum pressure P of operation less than compressor 1, high-low pressure by-pass collar 6 is opened.
In step e, minimum environment temperature T and the currently running pressure P2 of compressor 1 are preset when environment temperature T2 is greater than
When allowing the minimum pressure P of operation greater than compressor 1, controller controls shut-off valve or regulating valve to closed state, closes height
Press by-pass collar 6.It should be noted that closing the condition of high-low pressure by-pass collar 6, a specific threshold values can be set, this
Sample is more convenient for the control to air-conditioning system.As a preferred option, T+2 DEG C of minimum environment temperature is preset when environment temperature T2 is greater than
Or the currently running pressure P2 of compressor 1 be greater than compressor 1 allow run minimum pressure P+50kPa when, controller control close
Disconnected valve or regulating valve close high-low pressure by-pass collar 6 to closed state.In addition, presetting minimum environment when environment temperature T2 is greater than
When T+2 DEG C of temperature or the currently running pressure P2 of compressor are greater than the minimum pressure P+50kPa that compressor allows to run, controller
The flow for controlling shut-off valve or regulating valve is stablized compressor low pressure in P between P+50kPa, is guaranteed in compressor
Pressure is not too high or too low, plays the role of protection to compressor.
A kind of control method of the non-stop-machine heat pump air conditioning system of low temperature of the present embodiment is not necessarily to compared with prior art
Additionally put into other heating equipments, by control hp and lp bypass device 6, realize unit can under low ambient temperature state into
Row heating solves the problems, such as additionally put into other heating equipment auxiliary heatings in the past to increase cost.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (6)
1. a kind of non-stop-machine heat pump air conditioning system of low temperature, including condenser, throttling set, evaporator and compressor, compressor
Outlet pass sequentially through condenser, throttling set and evaporator after connect with the entrance of compressor, it is special to constitute heat pump circuit
Sign is that heat pump air conditioning system further includes the high-low pressure by-pass collar for adjusting heat pump circuit pressure difference.
2. the non-stop-machine heat pump air conditioning system of low temperature according to claim 1, which is characterized in that the heat pump air conditioning system
It further include four-way valve, the outlet of compressor passes sequentially through the first group interface, condenser, throttling set, evaporation of the four-way valve
Device, four-way valve the second group interface after connect with the entrance of compressor.
3. the non-stop-machine heat pump air conditioning system of low temperature according to claim 1 or 2, which is characterized in that by the high-low pressure
Exchange device includes controller and the shut-off valve being electrically connected with the controller or regulating valve, the entrance of the shut-off valve or regulating valve
By the outlet of pipeline and compressor, the outlet of the shut-off valve or regulating valve is connected by the entrance of pipeline and compressor
It is logical.
4. the non-stop-machine heat pump air conditioning system of low temperature according to claim 3, which is characterized in that further include for detecting ring
The environment temperature sensor of border temperature, the environment temperature sensor and the controller communicate to connect, when environment temperature is less than
When presetting minimum environment temperature and the currently running pressure of compressor and being less than the minimum pressure that compressor allows to run, controller control
Shut-off valve processed or regulating valve are to opening state.
5. the non-stop-machine heat pump air conditioning system of low temperature according to claim 4, which is characterized in that when environment temperature is greater than in advance
If minimum environment temperature and the currently running pressure of compressor are greater than the minimum pressure that compressor allows to run, controller control
Shut-off valve or regulating valve are to closed state.
6. the non-stop-machine heat pump air conditioning system of low temperature according to claim 1, which is characterized in that the throttling set is heat
One of or two or more combination in power expansion valve, electric expansion valve or capillary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920232390.3U CN209655615U (en) | 2019-02-22 | 2019-02-22 | A kind of non-stop-machine heat pump air conditioning system of low temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920232390.3U CN209655615U (en) | 2019-02-22 | 2019-02-22 | A kind of non-stop-machine heat pump air conditioning system of low temperature |
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| CN209655615U true CN209655615U (en) | 2019-11-19 |
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| CN201920232390.3U Active CN209655615U (en) | 2019-02-22 | 2019-02-22 | A kind of non-stop-machine heat pump air conditioning system of low temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737634A (en) * | 2019-02-22 | 2019-05-10 | 广东海悟科技有限公司 | A kind of non-stop-machine heat pump air conditioning system of low temperature and its control method |
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2019
- 2019-02-22 CN CN201920232390.3U patent/CN209655615U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737634A (en) * | 2019-02-22 | 2019-05-10 | 广东海悟科技有限公司 | A kind of non-stop-machine heat pump air conditioning system of low temperature and its control method |
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