CN111425913A - Intelligent control type heat exchanger unit - Google Patents
Intelligent control type heat exchanger unit Download PDFInfo
- Publication number
- CN111425913A CN111425913A CN202010436870.9A CN202010436870A CN111425913A CN 111425913 A CN111425913 A CN 111425913A CN 202010436870 A CN202010436870 A CN 202010436870A CN 111425913 A CN111425913 A CN 111425913A
- Authority
- CN
- China
- Prior art keywords
- water
- pipeline
- water supply
- secondary network
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 259
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 9
- 238000011001 backwashing Methods 0.000 claims description 16
- 239000013589 supplement Substances 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/105—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system pumps combined with multiple way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses an intelligent control type heat exchange unit, which consists of a heat exchange unit and a P L C control cabinet for complete machine control, wherein the heat exchange unit comprises a primary network circulation pipeline and a secondary network circulation pipeline which are connected with a plate heat exchanger and provided with data acquisition devices, the data acquisition devices are in communication connection with the P L C control cabinet, a secondary network water return pipeline at the water outlet side of the secondary network circulation pump set is connected with a secondary network water supply pipeline provided with a secondary network water replenishing pump set and a first water replenishing valve, a secondary network water supply pipeline at the water inlet side of the secondary network water replenishing pump set is connected with a water replenishing tank, the primary network water supply pipeline is connected with a secondary network water supply pipeline at the water outlet side of the secondary network water replenishing pump set through a primary network water supply branch pipe provided with a bidirectional pump and a second water replenishing valve, and the primary network water supply branch pipe is connected with the water replenishing tank through a bypass pipe provided with a bypass valve.
Description
Technical Field
The invention relates to an intelligent heat exchanger unit, in particular to an intelligent control type heat exchanger unit, and belongs to the technical field of heat exchanger units.
Background
The heat exchanger unit is an important device in a heating system and is responsible for exchanging heat of primary network circulation to secondary network circulation water to provide heating for users. The existing intelligent heat exchange unit is mostly composed of a heat exchanger, a variable frequency circulating pump, a water replenishing pump, a unit pipeline, a valve, a temperature transmitter, a pressure transmitter, an intelligent controller, a primary network water supply electric regulating valve and the like; the working principle is as follows: the primary heat source (steam or hot water) exchanges heat with the secondary return water pressurized by the circulating pump in the heat exchanger through the adjustment of the electric valve, and the hot water is sent to a user; and the secondary backwater is supplied with water and the pressure is fixed through a water supply pump. In the prior art, when the heat supply temperature of a primary network water supply pipeline is higher, the heat source supply quantity of the primary network side can be reduced only by adjusting the opening degree of an adjusting valve arranged on the primary network water supply pipeline; when the temperature of the heat source on the primary net side is ultrahigh, the high-temperature heat source enters the plate heat exchanger, so that the internal pipeline of the plate heat exchanger is easily damaged, the normal use of the plate heat exchanger is influenced, and the service life of the plate heat exchanger is shortened; and the heat exchange efficiency of the existing heat exchange unit needs to be improved. Therefore, in order to solve the above problems, it is necessary to design a new intelligent control type heat exchanger unit.
Disclosure of Invention
In order to solve the problems, the invention provides an intelligent control type heat exchange unit which is high in heat exchange efficiency and prolongs the service life of equipment.
The invention discloses an intelligent control type heat exchange unit which comprises a heat exchange unit and a P L C control cabinet used for controlling the whole machine, wherein the heat exchange unit comprises a primary network circulation pipeline and a secondary network circulation pipeline which are connected with a plate heat exchanger and provided with data acquisition devices, the data acquisition devices are in communication connection with the P L C control cabinet, the primary network circulation pipeline comprises a primary network water supply pipeline and a primary network water return pipeline, each secondary network circulation pipeline comprises a secondary network water supply pipeline and a secondary network water return pipeline, each secondary network water return pipeline is connected with a secondary network circulation pump set, the secondary network water return pipeline on the water outlet side of the secondary network circulation pump set is connected with a secondary network water replenishing pump set and a first water replenishing valve, the secondary network water replenishing pipeline on the water inlet side of the secondary network water replenishing pump set is connected with a water replenishing tank, the primary network water supply pipeline is connected with the secondary network water replenishing pump set on the water outlet side of the secondary network water replenishing pump set through a primary network water supply branch pipe with a bidirectional pump and a second water replenishing valve, and the primary network water replenishing branch pipe is connected with a water replenishing tank through a bypass pipe with a bypass water replenishing valve.
As a preferred embodiment, the system also comprises a back-flushing pipeline arranged at one side of the primary net circulating pipeline; the backwashing pipeline comprises a water inlet pipeline with a flushing pump set and connected with the water return side of the primary network of the plate heat exchanger through a backwashing water inlet switching valve, and a water outlet pipeline connected with the water supply side of the primary network of the plate heat exchanger through a backwashing water outlet switching valve; a return water switching valve is arranged between the primary net return water side of the plate heat exchanger and the primary net return water pipeline; and a water supply switching valve is arranged between the primary network water supply side of the plate heat exchanger and the primary network water supply pipeline.
Further, the data acquisition device comprises a temperature sensor, a pressure sensor and a flow sensor.
Furthermore, the water inlet sides of the primary network water supply pipeline and the secondary water return supply pipeline are respectively connected with a filter.
In a preferred embodiment, a secondary net water return pipeline on the water outlet side of the secondary net circulating pump group is also connected with a water drainage pipeline with a water drainage valve.
Compared with the prior art, the intelligent control type heat exchange unit has the advantages that a primary network water supply pipeline is connected with a secondary network water replenishing pipeline through a primary network water supply branch pipe with a bidirectional pump, the primary network water supply branch pipe is connected with a water replenishing tank through a bypass pipe, the bidirectional pump is mounted on the primary network water supply branch pipe, the water inlet and outlet directions of the bidirectional pump can be switched according to the situation that the primary network heat supply temperature heat exchange secondary network returns water and replenishes water, so that the water inlet temperature of the primary network water supply side of the plate heat exchanger is reduced, the phenomenon that the heat exchange pipeline in the plate heat exchanger is damaged due to overhigh water temperature entering the pipeline in the plate heat exchanger is avoided, and the service life; and a back washing pipeline is also arranged, so that the internal pipeline of the plate heat exchanger can be regularly back washed, the plate heat exchanger can be conveniently cleaned, and the service life of the plate heat exchanger is prolonged.
Drawings
Fig. 1 is a schematic diagram of the overall system configuration of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a heat exchanger unit according to embodiment 1 of the present invention.
Fig. 3 is a schematic diagram of the overall system configuration of embodiment 2 of the present invention.
Fig. 4 is a schematic structural diagram of a heat exchanger unit in embodiment 2 of the present invention.
The parts in the drawing are marked as an A-heat exchange unit, a B-P L C operation cabinet, a 1-plate heat exchanger, a 2-primary net water supply pipeline, a 3-primary net water return pipeline, a 4-secondary net water supply pipeline, a 5-secondary net water return pipeline, a 6-secondary net circulating pump set, a 7-secondary net water supply pump set, an 8-first water replenishing valve, a 9-secondary net water supply pipeline, a 10-water replenishing tank, an 11-two-way pump, a 12-second water replenishing valve, a 13-primary net water supply branch pipe, a 14-bypass valve, a 15-bypass pipe, a 16-filter, a 17-water drain valve, an 18-water drain pipeline, a 19-backflushing water inlet switching valve, a 20-flushing pump set, a 21-water inlet pipeline, a 22-backflushing water outlet switching valve, a 23-water outlet pipeline, a 24-backwater switching valve, a 25-water supply switching valve, a T-temperature sensor, a P-pressure sensor.
Detailed Description
Example 1:
the intelligent control type heat exchange unit shown in the figures 1 and 2 comprises a heat exchange unit A and a P L C operation control cabinet B for complete machine control, wherein the heat exchange unit A comprises a primary water supply pipeline and a secondary water supply pipeline which are connected with a plate type heat exchanger 1 and provided with a data acquisition device, the data acquisition device is in communication connection with the P L C operation control cabinet B, the primary water supply pipeline comprises a primary water supply pipeline 2 with a regulating valve and a primary water return pipeline 3, the secondary water supply pipeline comprises a secondary water supply pipeline 4 and a secondary water return pipeline 5, the secondary water return pipeline 5 is connected with a secondary water network circulation pump 6, the secondary water return pipeline 5 on the water outlet side of the secondary water network circulation pump 6 is connected with a secondary water supply pump set 7 and a primary water supply pump set 8, the secondary water network water supply pipeline 9 on the water inlet side of the secondary water supply pump set 7 is connected with a water tank 10, the primary water supply pipeline 9 on the primary water supply side of the secondary water supply pump set 7 is connected with a secondary water supply pump set 4 and a secondary water supply pump set, the secondary water supply pipeline is connected with a secondary water return pump set, the secondary water supply pipeline 14, a secondary water supply pipeline is connected with a secondary water return pump set, a secondary water supply pipeline 14, a secondary water supply pipeline is connected with a secondary water return pump set, a secondary water supply pipeline 14, a secondary water return pump set is connected with a secondary water supply pipeline 14, a secondary water supply pump set, a secondary water return pipeline 14, a secondary water return pump set, a secondary water return pipeline 14, a secondary water supply pump set, a secondary water supply pipeline is connected with a secondary water return pump set, a secondary water supply pipeline 14, a secondary water return pump set, a secondary water supply pipeline is connected with a secondary water return pump set, a secondary water supply pump set, a secondary water return pipeline is connected with a secondary water return pump set, a secondary water supply pump set, a secondary water return pump set, a secondary water supply pump set, a secondary water return pump set is connected with a secondary water return pipeline is connected with a secondary water return pump set 7 and a secondary water return pump set, a secondary water supply pipeline 14, a secondary water return pump set, a secondary water return pipeline is connected with a secondary water return pump set, a secondary water supply pump set, a secondary water return pump set, a secondary water supply pump set, a secondary water return pump set.
The data acquisition device comprises a temperature sensor T, a pressure sensor P and a flow sensor F.
The water inlet sides of the primary network water supply pipeline 2 and the secondary water return supply pipeline 5 are respectively connected with a filter 16 for filtering impurities, so that pipeline blockage is avoided, and heat exchange efficiency is influenced.
The secondary network return water pipeline 5 on the water outlet side of the secondary network circulating pump unit 6 is also connected with a water drainage pipeline 18 with a water drainage valve 17, when detection values of a pressure sensor and a flow sensor on the secondary network return water pipeline are higher than preset values, the water drainage valve is controlled and opened by a control cabinet through P L C, the water drainage pipeline is connected with the secondary network return water pipeline, and the water pressure and the water flow of the secondary network return water pipeline are balanced through the water drainage pipeline.
Example 2:
the intelligent control type heat exchange unit as shown in fig. 3 and 4 has a structure basically the same as that of embodiment 1, and further comprises a backwashing pipeline arranged on one side of a primary network circulation pipeline, the backwashing pipeline comprises a water inlet pipeline 21 which is connected with a primary network return water side of the plate heat exchanger 1 through a backwashing water inlet switching valve 19 and is provided with a washing pump set 20, and a water outlet pipeline 23 which is connected with a primary network water supply side of the plate heat exchanger 1 through a backwashing water outlet switching valve 22, a return water switching valve 24 is arranged between the primary network return water side of the plate heat exchanger 1 and the primary network return water pipeline 3, a water supply switching valve 25 is arranged between the primary network water supply side of the plate heat exchanger 1 and the primary network water supply pipeline 2, a backwashing pipeline is arranged, the back flushing pump set can be periodically performed on the internal pipeline of the plate heat exchanger, the cleaning of the plate heat exchanger is facilitated, the service life of the plate heat exchanger is prolonged, specifically, when the backwashing is needed, a P L C control cabinet controls the water supply switching valve of the primary network water supply pipeline and the return water switching valve to operate, the water inlet pipeline of the primary network water supply pipeline and the return water pipeline of the plate heat exchanger is switched valve, the water supply pipeline is switched to be switched, the water inlet pipeline of the backwashing water supply pipeline, the back flushing water return water supply pipeline is switched valve is switched to be switched, the water supply pipeline, the washing water supply pipeline of the plate heat exchanger, the back flushing water return water supply pipeline, the back flushing water return water.
According to the intelligent control type heat exchange unit, a primary network water supply pipeline is connected with a secondary network water supplement pipeline through a primary network water supply branch pipe with a bidirectional pump, the primary network water supply branch pipe is connected with a water supplement tank through a bypass pipe, the bidirectional pump is installed on the primary network water supply branch pipe, the water inlet and outlet directions of the bidirectional pump can be switched according to the situation that the primary network heat supply temperature exchanges heat and the secondary network water supplement returns, so that the water inlet temperature of the primary network water supply side of the plate heat exchanger is reduced, the phenomenon that the internal heat exchange pipeline of the plate heat exchanger is damaged due to overhigh water temperature entering the internal pipeline of the plate heat exchanger is avoided, and the service life of; and a back washing pipeline is also arranged, so that the internal pipeline of the plate heat exchanger can be regularly back washed, the plate heat exchanger can be conveniently cleaned, and the service life of the plate heat exchanger is prolonged.
The above-described embodiments are merely preferred embodiments of the present invention, and all equivalent changes or modifications of the structures, features and principles described in the claims of the present invention are included in the scope of the present invention.
Claims (5)
1. An intelligent control type heat exchange unit comprises a heat exchange unit and a P L C control cabinet used for controlling the whole heat exchange unit, wherein the heat exchange unit comprises a primary network circulation pipeline and a secondary network circulation pipeline which are connected with a plate heat exchanger and provided with data acquisition devices, the data acquisition devices are in communication connection with the P L C control cabinet, the primary network circulation pipeline comprises a primary network water supply pipeline and a primary network water return pipeline which are provided with regulating valves, the secondary network circulation pipeline comprises a secondary network water supply pipeline and a secondary network water return pipeline, the secondary network water return pipeline is connected with a secondary network circulation pump set, the secondary network water return pipeline on the water outlet side of the secondary network circulation pump set is connected with a secondary network water supply pipeline provided with a secondary network water supplement pump set and a first water supplement valve, the secondary network water supplement pipeline on the water inlet side of the secondary network water supplement pump set is connected with a water supplement tank, and the primary network water supply pipeline is connected with the secondary network water supplement tank on the water outlet side of the secondary network water pump set through a primary network water supply branch pipe provided with a bidirectional pump and a second water supplement valve, and the primary network water supplement tank is connected with a bypass water supplement tank through a bypass water supply.
2. The intelligent control type heat exchanger unit of claim 1, wherein: the device also comprises a back-washing pipeline arranged on one side of the primary network circulating pipeline; the backwashing pipeline comprises a water inlet pipeline with a flushing pump set and connected with the water return side of the primary network of the plate heat exchanger through a backwashing water inlet switching valve, and a water outlet pipeline connected with the water supply side of the primary network of the plate heat exchanger through a backwashing water outlet switching valve; a return water switching valve is arranged between the primary net return water side of the plate heat exchanger and the primary net return water pipeline; and a water supply switching valve is arranged between the primary network water supply side of the plate heat exchanger and the primary network water supply pipeline.
3. The intelligent control type heat exchanger unit of claim 1, wherein: the data acquisition device comprises a temperature sensor, a pressure sensor and a flow sensor.
4. The intelligent control type heat exchanger unit of claim 1, wherein: and the water inlet sides of the primary network water supply pipeline and the secondary water return pipeline are respectively connected with a filter.
5. The intelligent control type heat exchanger unit of claim 1, wherein: and a secondary network water return pipeline on the water outlet side of the secondary network circulating pump group is also connected with a water drain pipeline with a water drain valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010436870.9A CN111425913B (en) | 2020-05-21 | 2020-05-21 | Intelligent control type heat exchanger unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010436870.9A CN111425913B (en) | 2020-05-21 | 2020-05-21 | Intelligent control type heat exchanger unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111425913A true CN111425913A (en) | 2020-07-17 |
| CN111425913B CN111425913B (en) | 2021-11-05 |
Family
ID=71553194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010436870.9A Active CN111425913B (en) | 2020-05-21 | 2020-05-21 | Intelligent control type heat exchanger unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111425913B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269442A (en) * | 2011-07-13 | 2011-12-07 | 清华大学 | Heating system utilizing heat pump technology to improve heating capacity of central heating pipe network |
| CN103335359A (en) * | 2013-07-09 | 2013-10-02 | 浙江大学昆山创新中心 | Intelligent heat exchange station |
| CN104864488A (en) * | 2014-11-25 | 2015-08-26 | 青岛同创节能环保工程有限公司 | Full-automatic heating system capable of realizing switching between heat exchange heating and direct connection heating |
| CN105444243A (en) * | 2014-09-02 | 2016-03-30 | 盾安（天津）节能系统有限公司 | Waste heat recovery heat supply and water charging system and water charging method |
| CN208237955U (en) * | 2018-04-18 | 2018-12-14 | 石家庄国融安能分布能源技术有限公司 | A kind of heat-exchange unit for simplifying optimization |
-
2020
- 2020-05-21 CN CN202010436870.9A patent/CN111425913B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269442A (en) * | 2011-07-13 | 2011-12-07 | 清华大学 | Heating system utilizing heat pump technology to improve heating capacity of central heating pipe network |
| CN103335359A (en) * | 2013-07-09 | 2013-10-02 | 浙江大学昆山创新中心 | Intelligent heat exchange station |
| CN105444243A (en) * | 2014-09-02 | 2016-03-30 | 盾安（天津）节能系统有限公司 | Waste heat recovery heat supply and water charging system and water charging method |
| CN104864488A (en) * | 2014-11-25 | 2015-08-26 | 青岛同创节能环保工程有限公司 | Full-automatic heating system capable of realizing switching between heat exchange heating and direct connection heating |
| CN208237955U (en) * | 2018-04-18 | 2018-12-14 | 石家庄国融安能分布能源技术有限公司 | A kind of heat-exchange unit for simplifying optimization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111425913B (en) | 2021-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103438503A (en) | Unattended intelligent control method and control system for heat exchange station | |
| CN208237955U (en) | A kind of heat-exchange unit for simplifying optimization | |
| CN204574617U (en) | A kind of publilc baths waste water recycling system with Self-cleaning system | |
| CN110213932A (en) | A kind of liquid cooling system and liquid cooling system control method | |
| CN111425913A (en) | Intelligent control type heat exchanger unit | |
| CN202485278U (en) | Hot spring bathing pool heat energy recycling system | |
| CN201589576U (en) | Back-washing system of plate type heat exchanger | |
| CN201448918U (en) | High-intelligent plate heat exchanger unit | |
| CN210346468U (en) | Heat exchanger with back flush function | |
| CN204574619U (en) | A kind of publilc baths waste water recycling system with ancillary heating equipment | |
| CN212204711U (en) | Heat supply system for improving total heat supply capacity of heat source | |
| CN212378249U (en) | Heating waterway system capable of automatically cleaning pipeline and household heating water heater thereof | |
| CN114322626A (en) | Marine heat exchange system capable of filtering seawater in two directions | |
| CN208475457U (en) | Self-operated type balances heating system | |
| CN207175502U (en) | Water cleaning systems and water purifier | |
| CN111380100A (en) | Energy-saving reconstruction system of heat supply unit and energy-saving operation control method thereof | |
| CN211976979U (en) | One-network variable frequency pump heat supply unit | |
| CN219510871U (en) | Mixed heat exchanger unit | |
| CN214842741U (en) | Anti-scaling automatic back-flushing type heat exchange unit | |
| CN105509315A (en) | Water source heat pump and plate heat exchanger combined heat recovery system and control method thereof | |
| CN209512150U (en) | A kind of full-automatic plate-type heat-exchange unit | |
| CN207263005U (en) | Heat-exchange device and heating system | |
| CN212878935U (en) | Water boiler with filtering device | |
| CN219661443U (en) | Full-boiled water purifying water dispenser | |
| CN221306371U (en) | Cooling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |