CN220771272U - Four-pipe air conditioner cold recovery system of ground source heat pump - Google Patents
Four-pipe air conditioner cold recovery system of ground source heat pump Download PDFInfo
- Publication number
- CN220771272U CN220771272U CN202321920372.7U CN202321920372U CN220771272U CN 220771272 U CN220771272 U CN 220771272U CN 202321920372 U CN202321920372 U CN 202321920372U CN 220771272 U CN220771272 U CN 220771272U
- Authority
- CN
- China
- Prior art keywords
- loop
- cold
- heat pump
- pipe
- heat
- 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.)
- Active
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000000034 method Methods 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 description 15
- 238000001816 cooling Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 235000021167 banquet Nutrition 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Other Air-Conditioning Systems (AREA)
Abstract
The utility model relates to the technical field of ground source heat pump air conditioners, in particular to a four-pipe air conditioner cold recovery system of a ground source heat pump, which comprises a heat pump unit, wherein the heat pump unit consists of an evaporator and a condenser; the evaporator is connected with the cold water loop, the condenser is connected with the hot water loop, and the cold water loop and the hot water loop are respectively connected with the first working loop and the ground buried pipe heat exchange loop through the switching valve; the heat exchange circuit of the buried pipe is connected with a branch, the branch is a second working circuit, the second working circuit is provided with a cold recovery circulating pump, when in winter, the hot water circuit of the heat pump unit can supply heat normally, the cold water in the cold water circuit firstly realizes the cold supply function before passing through the heat exchange of the buried pipe, and then the heat exchange of the buried pipe can realize the simultaneous cold supply and heat supply of a group of heat pump units.
Description
Technical Field
The utility model relates to the technical field of ground source heat pump air conditioners, in particular to a four-pipe air conditioner cold recovery system of a ground source heat pump.
Background
The ground source heat pump utilizes the huge heat accumulation and cold accumulation capacity of underground soil, and utilizes a heat pump system to transfer heat from the soil into a building in winter to supply heat for the building; and transferring heat from the building house to the soil in summer to cool the building. The ground source heat pump system is used as a cold source of a building air conditioner, air-conditioning circulating hot water at 45/40 ℃ is provided in winter, air-conditioning cold water at 7/12 ℃ is provided in summer, and tail end air conditioning equipment such as a fan coil, an air processing unit and the like utilizes the air-conditioning cold and hot water to supply cold and heat for a room.
In some high-grade hotels, cooling and heating (especially in winter, heating is needed in common rooms, cooling is needed in large banquet halls, kitchens and other spaces), four-pipe air conditioning systems are generally adopted, and terminal equipment of the four-pipe air conditioning systems is simultaneously connected with an air conditioning hot water loop and an air conditioning cold water loop, and each loop comprises a water inlet pipe and a water outlet pipe, so that the four-pipe air conditioning system is called four-pipe control.
The four-pipe air conditioning system can realize the adjustment of cooling or heating at any time through the switching between the hot water loop and the cold water loop and the working loop as well as the ground buried pipe heat exchange loop. In a traditional ground source heat pump four-pipe air conditioning system, one group of heat pump units can only realize one of heat supply or cold supply functions, and for the condition of simultaneous cold supply and heat supply, at least two groups of heat pump units are often selected to operate and respectively realize one of cold supply or heat supply; the heat supply unit and the cold supply unit are operated simultaneously, consume electric energy, have more equipment, large occupied area, high initial investment and high operation cost
Disclosure of Invention
In order to solve the problems that when the working condition of simultaneously supplying cold or heat is needed, at least two groups of heat pump units need to be operated, the conventional four-pipe air conditioning system needs to be improved, so that one group of heat pump units can simultaneously realize the work of supplying cold and heat.
The object of the utility model is achieved in the following way: the four-pipe air conditioner cold recovery system of the ground source heat pump comprises a heat pump unit 1, wherein the heat pump unit 1 consists of an evaporator 11 and a condenser 12;
the evaporator 11 is connected with a cold water loop, the condenser 12 is connected with a hot water loop, and the cold water loop and the hot water loop are respectively connected with the first working loop 101 and the buried pipe heat exchange loop 102 through switching valves;
the ground pipe heat exchange loop 102 is connected to a branch, the branch is a second working loop 103, and the second working loop 103 is provided with a cold recovery circulating pump 3.
Further, the second working circuit 103 is provided with a plate heat exchanger 2.
Further, the ground heat exchange circuit 102 is connected in parallel with a bypass pipe 104, and the bypass pipe 104 is provided with an electric bypass valve 6.
Compared with the prior art, the system has the advantages that the second working loop is connected into the ground pipe heat exchange loop, so that the hot water loop of the heat pump unit can normally supply heat in winter, the cold water in the cold water loop firstly realizes the cold supply function before passing through the ground pipe heat exchange, and then the ground pipe heat exchange is carried out, so that a group of heat pump units can simultaneously supply cold and heat.
Drawings
Fig. 1 is a schematic diagram of a ground source heat pump four-pipe air conditioning system cold recovery system.
The heat pump system comprises a heat pump unit 1, an evaporator 11, a condenser 12, a plate heat exchanger 2, a cold recovery circulating pump 3, a buried pipe water separator 4, a buried pipe water collector 5, an electric bypass valve 6, a buried pipe circulating pump 7, a first switching valve 8 (opened in winter), a second switching valve 9 (opened in summer), a buried pipe heat exchanger 10, a first working circuit 101, a buried pipe heat exchange circuit 102, a second working circuit 103 and a bypass pipe 104.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used for convenience of description and for simplifying the description only with respect to the orientation or positional relationship shown in the drawings, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.
As shown in figure 1, the four-pipe air conditioner cold recovery system of the ground source heat pump comprises a heat pump unit 1, wherein the heat pump unit 1 consists of an evaporator 11, a condenser 12 and other components;
the evaporator 11 is connected with a cold water loop, the condenser 12 is connected with a hot water loop, and the cold water loop and the hot water loop are respectively connected with a first working loop 101 and a buried pipe heat exchange loop 102 through a switching valve;
the ground pipe heat exchange loop 102 is connected to a branch, the branch is a second working loop 103, and the second working loop 103 is provided with a cold recovery circulating pump 3.
It should be noted that the temperatures shown in the drawings are only for convenience of explanation and understanding, and are not limiting of the present utility model.
The first working circuit 101, the ground heat exchange circuit 102 and the second working circuit 103 mentioned in the application are all composed of two pipelines, including a water outlet pipeline and a water inlet pipeline, and the structure of the heat pump unit 1 belongs to the mature prior art, and is not repeated here.
In detail, the cold water circuit connected with the evaporator 11 is connected with the first working circuit 101 and the ground heat exchange circuit 102 through the first switching valve 8 and the second switching valve 9 respectively; the hot water loop connected with the condenser 12 is connected with the first working loop 101 and the buried pipe heat exchange loop 102 through the first switching valve 8 and the second switching valve 9 respectively;
the ground pipe heat exchange loop 102 comprises a water inlet pipeline and a water outlet pipeline, wherein one end of the water inlet pipeline is connected with the input end of the ground pipe water separator 4, a plurality of output ends of the ground pipe water separator 4 are respectively connected with the input ends of a plurality of ground pipes 10, the output ends of the ground pipes 10 are connected with a plurality of input ends of the ground pipe water collector 5, and the output ends of the ground pipe water collector 5 are connected with one end of the water outlet pipeline; preferably, a buried pipe circulating pump 7 is arranged on the water outlet pipeline to control the flow;
in summer, the second switching valve 9 is opened, the first switching valve 8 is closed, the cold water loop connected with the evaporator 11 is matched with the first working loop 101 for cooling, and the hot water loop connected with the condenser 12 is matched with the buried pipe heat exchange loop 102 for realizing heat exchange; in winter, the second switching valve 9 is closed, the first switching valve 8 is opened, the hot water loop connected with the condenser 12 is matched with the first working loop 101 to supply heat, and the cold water loop connected with the evaporator 11 is matched with the buried pipe heat exchange loop 102 to realize heat exchange.
The second working circuit 103 includes a water inlet pipeline and a water outlet pipeline, preferably, the water inlet pipeline and the water outlet pipeline of the second working circuit 103 are both connected to the water inlet pipeline of the ground pipe heat exchange circuit 102 to form a branch, and the cold recovery circulating pump 3 is arranged to control the flow of the branch, so that when in winter, part of cold water in the cold water circuit connected with the evaporator 11 is recovered and cooled through the branch.
Further, the plate heat exchanger 2 is arranged in the second working loop 103, so that not only is the effect of running a group of heat pump units for simultaneously supplying cold and heat realized, but also the heat extraction amount of the ground source heat pump buried pipe 10 from the soil is reduced, the heat supply area of the ground source heat pump system is increased, and the heating efficiency is improved.
Further, the operation frequency of the cold recovery circulating pump 3 is adjusted to adjust the cold recovery circulating water quantity, so that the cold recovery quantity is adjusted, and the cold recovery system is adapted to the tail end cold load change.
Further, the ground pipe heat exchange loop 102 is connected with the bypass pipe 104 in parallel, the bypass pipe 104 is provided with the electric bypass valve 6, and in detail, a pipeline is connected between the water inlet pipeline and the water outlet pipeline of the ground pipe heat exchange loop 102 to realize self circulation, and the effect is that the electric bypass valve 6 can be opened when the temperature of circulating water in the ground pipe 10 is higher in the early winter or the heating quantity is smaller, so that heat exchange from the ground pipe 10 is not performed (or reduced), and an internal circulation is formed, thereby reducing the temperature of the circulating water of the ground pipe, ensuring the cooling effect of the second working loop 103, and meeting the cold recovery requirement; when the air conditioner does not have the cooling requirement, the cold recovery circulating pump 3 is stopped, and the circulating water of the ground source heat pump 1 completely enters the buried pipe 10 for heat exchange, so that the normal heat supply of the system is not influenced.
The working process of the utility model is as follows: here, a working condition is simulated, referring to the temperature marked in fig. 1, in winter, the second switching valve 9 is closed, the first switching valve 8 is opened, the hot water loop connected with the condenser 12 is matched with the first working loop 101 to supply heat, the cold water loop connected with the evaporator 11 is matched with the ground pipe heat exchange loop 102 to realize heat exchange, cold water in the cold water loop is conveyed to the cold recovery heat exchanger 2 through the cold recovery circulating pump 3, and is connected with air-conditioning cold water of a user of the second working loop 103 after heat exchange of the cold recovery heat exchanger 2;
according to the change of the cold load at the tail end of the air conditioner in the operation process, the frequency of the cold recovery circulating pump 3 is regulated to regulate the cold water quantity entering the cold recovery heat exchanger 2, so as to regulate the cold recovery quantity. When the system does not have the cooling requirement, the cold recovery circulating pump 3 stops running, and all the ground pipe circulating water enters the ground pipe heat exchanger 10 for heat exchange, so that the heat supply of the system is not affected.
When the temperature of the circulating water of the buried pipe is higher in the early winter or the heating quantity is smaller, the electric bypass valve 6 between the water supply and return main pipes of the buried pipe can be adjusted, the low-temperature side temperature of the circulating water of the buried pipe is reduced, the cold recovery requirement is met, and at the moment, although the heat supply efficiency is slightly reduced, the system supplies heat while supplying cold, and the overall energy efficiency is far higher than the total energy consumption of two sets of units of a single heat supply unit and a single cold supply unit.
The cold load in winter is relatively small, the dehumidification problem is not considered, the out-of-season air conditioner cooling system can operate by adopting a large temperature difference, the return water temperature can be controlled at 12-15 ℃, the conveying energy consumption is further reduced, and the operation cost is reduced.
The four-pipe air conditioning system of the ground source heat pump combines a heat recovery technology, after a cold recovery technology, one set of system can supply cold and heat at any time all the year round, the potential of the ground source heat pump system is furthest excavated, and the utilization rate and economic benefit of the ground source heat pump system are improved; the ground source heat pump system is provided with various means for regulating the cold and hot balance of the soil, and the adaptability of the ground source heat pump system is improved.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several changes and modifications can be made without departing from the general inventive concept, and these should also be regarded as the scope of the utility model.
Claims (3)
1. The four-pipe air conditioner cold recovery system of the ground source heat pump comprises a heat pump unit (1), wherein the heat pump unit (1) consists of an evaporator (11) and a condenser (12);
the evaporator (11) is connected with a cold water loop, the condenser (12) is connected with a hot water loop, and the cold water loop and the hot water loop are respectively connected with a first working loop (101) and a buried pipe heat exchange loop (102) through switching valves;
the method is characterized in that: the ground pipe laying heat exchange loop (102) is connected into a branch, the branch is a second working loop (103), and the second working loop (103) is provided with a cold recovery circulating pump (3).
2. The ground source heat pump four-pipe air conditioner cold recovery system as set forth in claim 1, wherein: the second working circuit (103) is provided with a plate heat exchanger (2).
3. The ground source heat pump four-pipe air conditioner cold recovery system as set forth in claim 1, wherein: the underground pipe heat exchange loop (102) is connected with a bypass pipe (104) in parallel, and the bypass pipe (104) is provided with an electric bypass valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321920372.7U CN220771272U (en) | 2023-07-20 | 2023-07-20 | Four-pipe air conditioner cold recovery system of ground source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321920372.7U CN220771272U (en) | 2023-07-20 | 2023-07-20 | Four-pipe air conditioner cold recovery system of ground source heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220771272U true CN220771272U (en) | 2024-04-12 |
Family
ID=90601584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321920372.7U Active CN220771272U (en) | 2023-07-20 | 2023-07-20 | Four-pipe air conditioner cold recovery system of ground source heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220771272U (en) |
-
2023
- 2023-07-20 CN CN202321920372.7U patent/CN220771272U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110608495A (en) | Multi-adjustment-mode integrated air conditioning system and working method thereof | |
| EP4343214A1 (en) | Multi-mode water-fluorine multi-split system | |
| CN101131266A (en) | Heat recovery multi-split air conditioner | |
| CN108626836B (en) | Independent fresh air handling unit with air energy heat pump heat recovery and humidification functions | |
| CN105276861A (en) | Compensation type double-source heat pump cold and hot air air-conditioner unit | |
| CN108662714B (en) | Independent fresh air unit of air energy heat pump heat recovery | |
| CN207865610U (en) | A kind of middle temperature air conditioning system based on regional cold supply system | |
| CN210267580U (en) | Composite energy air treatment unit | |
| CN109341138B (en) | Combined air conditioning system of machine room and hot water system and control method thereof | |
| CN109357426B (en) | Combined air conditioning system for machine room and control method thereof | |
| CN109340960B (en) | Combined air conditioning system of machine room and control method thereof | |
| CN107764122B (en) | Large-temperature-difference cold water combined type cascade utilization system based on waste heat utilization | |
| CN220771272U (en) | Four-pipe air conditioner cold recovery system of ground source heat pump | |
| CN108644942B (en) | Multi-source complementary distributed heat source tower heat pump system | |
| CN104819523A (en) | Refrigeration dehumidifying all-air conditioning unit with all cold and heat sources | |
| CN102003834B (en) | Multifunctional air source hot water and air conditioning heat pump unit | |
| CN212029740U (en) | Multifunctional temperature and humidity separately-controlled air conditioning system based on double-suction pressure compressor | |
| CN113803816A (en) | Water source VRF air conditioning system coupled with all-year cooling system and use method thereof | |
| CN210014503U (en) | Heat exchange device and heat pump air conditioning system with same | |
| CN204165264U (en) | A kind of refrigeration system for radiation air-conditioner | |
| CN109282456B (en) | Control method of large centralized air conditioning system capable of performing cooling decentralized control and independent operation | |
| CN113324350A (en) | Dual-setting temperature shunt and simulation system thereof | |
| CN105605818A (en) | Double-working-condition air conditioner | |
| CN206247527U (en) | Radiation plus the heat pump assembly and radiation plus fresh air conditioner system of fresh air conditioner system | |
| CN110986202A (en) | Device for dehumidifying working medium direct expansion floor heating and cooling air pipe machine with accurate control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |