CN216048463U - Heat pump system of modular indoor natural convection heat exchange unit - Google Patents
Heat pump system of modular indoor natural convection heat exchange unit Download PDFInfo
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- CN216048463U CN216048463U CN202120055069.XU CN202120055069U CN216048463U CN 216048463 U CN216048463 U CN 216048463U CN 202120055069 U CN202120055069 U CN 202120055069U CN 216048463 U CN216048463 U CN 216048463U
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Abstract
The utility model discloses a heat pump system of a modular indoor natural convection heat exchange unit, which comprises a plurality of indoor natural convection heat exchange modules, a supply three-way valve, a distribution three-way valve and the like which are connected in parallel. Each indoor natural convection heat exchange module comprises an indoor natural convection heat exchange unit, a throttling element and a stop valve; in each indoor natural convection heat exchange module, one end of a pipeline in which a throttling element and a stop valve are connected in parallel is connected with an inlet of an indoor natural convection heat exchange unit, and the other end of the pipeline is converged on a supply three-way valve together with the throttling element and the stop valve of other indoor natural convection heat exchange modules connected in parallel; the outlet ends of the indoor natural convection heat exchange units of the indoor natural convection heat exchange modules are converged on the distribution three-way valve. The heat pump system has the advantages that the operation safety and performance are improved, and the indoor natural convection heat exchange unit is simple in structure, light in weight, convenient to modularize and manufacture, good in heat dissipation effect and easy to maintain and replace.
Description
Technical Field
The utility model mainly relates to the technical field of heat pump heating (cooling) equipment, in particular to a heat pump system of a modular indoor natural convection heat exchange unit.
Background
The heat pump heating (cooling) equipment is used as efficient and clean heating (cooling) equipment, is widely applied to houses, farmhouses, various public buildings and the like, and provides comfortable indoor environment for people. The forced convection heat exchange unit can improve the heat exchange efficiency, reduce the size and the weight of the forced convection heat exchange unit, and is an indoor heat exchange unit generally adopted by the existing heat pump. However, the indoor heat exchange unit has strong blowing sense, hot (cold) wind agglomeration can occur, the uniformity of indoor temperature distribution is reduced, the indoor thermal comfort is seriously influenced, and even the health of people is influenced. In order to improve such a problem of the heat pump using the indoor forced convection heat exchange unit, in recent years, the heat pump increasingly uses the indoor natural convection heat exchange unit, for example, a heat exchange pipe is disposed at a floor heating end under a floor, a ceiling cooling end where a heat exchange member is combined with a ceiling, or a wall heat exchange end where a capillary heat exchange pipe is buried in a wall, or the like. However, these indoor natural convection heat exchange units need to be fabricated on site, are complex in installation and construction, difficult to maintain and replace, and have single functions of a ceiling cooling supply terminal and a floor heating supply terminal, which seriously hinders the popularization and application of the units.
SUMMERY OF THE UTILITY MODEL
The utility model aims to design a modular indoor natural convection heat exchange unit with simple structure and similar composition for a heat pump, which comprises a thin steel plate rolled and welded pipe bent into a snake shape, a plurality of radiating strips welded on the side surface of the snake-shaped pipe and the like, wherein working medium flows in the pipe, and air naturally convects on the outer surfaces of the pipe and the radiating strips. The modular natural convection heat exchange unit can be selected, matched and connected according to indoor sites, is installed vertically in front of a wall surface, has a good heat dissipation effect, and is convenient to maintain and replace. Meanwhile, a bypass valve and a natural subcooler are further arranged for the heat distribution pump system of the indoor natural convection heat exchange unit, so that the running performance and safety of the heat pump are further improved.
In order to achieve the above object of the present invention, the present invention provides a heat pump system of a modular indoor natural convection heat exchange unit, which is characterized in that: the heat pump system comprises a plurality of indoor natural convection heat exchange modules, a supply three-way valve, a distribution three-way valve and the like which are connected in parallel. Each indoor natural convection heat exchange module comprises an indoor natural convection heat exchange unit, a throttling element and a stop valve; in each indoor natural convection heat exchange module, one end of a pipeline in which a throttling element and a stop valve are connected in parallel is connected with an inlet of an indoor natural convection heat exchange unit, and the other end of the pipeline is converged on a supply three-way valve together with the throttling element and the stop valve of other indoor natural convection heat exchange modules connected in parallel; the outlet ends of the indoor natural convection heat exchange units of the indoor natural convection heat exchange modules are converged on the distribution three-way valve.
The indoor natural convection heat exchange unit consists of a thin steel plate rolled pipe and a plurality of heat dissipation strips, and the thin steel plate rolled pipe is in a snake-shaped tubular shape; the plurality of radiating strips are arranged on two sides or one side of the tube rolled by the thin steel plate and are tightly connected with the surface of the tube rolled by the thin steel plate.
Furthermore, the joint of the heat dissipation strip and the pipe rolled by the thin steel plate is connected through welding materials or sealing materials.
Further, the heat pump system also comprises a bypass valve 5, a four-way valve 6, a compressor 7, an outdoor heat exchanger 8, a heating throttling element 9 and a natural subcooler 10; the distribution three-way valve 11 is converged with the supply three-way valve 4 and then connected to the four-way valve 6; the distribution three-way valve 11 is also connected with a natural subcooler 10, the natural subcooler 10 is connected to an outdoor heat exchanger 8 after passing through a heating throttling element 9, and the outdoor heat exchanger 8 is connected to the supply three-way valve 4; the four-way valve 6 is connected with the air inlet of the compressor and the air outlet of the compressor, and the four-way valve 6 is also connected to the outdoor heat exchanger 8; the bypass valve 5 is connected in parallel between the four-way valve 6 and the outdoor heat exchanger 8.
Furthermore, the number of the indoor natural convection heat exchange units of each indoor natural convection heat exchange module is one or more, and the indoor natural convection heat exchange units are connected in parallel, in series or in series-parallel.
Furthermore, when more than two indoor natural convection heat exchange units of the heat pump system are connected in parallel, the throttling elements are distributed at the inlet of each indoor natural convection heat exchange unit or are intensively arranged on a pipeline for supplying a three-way valve.
Further, the natural convection heat exchange unit and the throttling element in the heat pump system chamber can be arranged separately, or combined into a whole.
Further, the bypass valve 5 of the heat pump system may be omitted.
Further, the compressor 7 of the heat pump system is a single-stage compressor, or a compressor with an air supplement port or a single two-stage compressor; if the compressor is provided with an air supplement port or a single-machine secondary compressor, the heat pump needs to be matched with an air supplement flow path.
Further, the natural subcooler 10 of the heat pump system can be omitted.
Further, the part of the heat pump system supplying working medium for the indoor natural convection heat exchange unit 1 can be replaced by an air-cooled heat pump cold and hot water unit.
According to the modular indoor natural convection heat exchange unit and the heat pump system thereof, the snakelike thin-wall steel pipe and the plurality of heat dissipation strips are combined into the indoor natural convection heat exchange unit, so that the modular indoor natural convection heat exchange unit is simple in structure, light in weight, convenient to modularize and manufacture, good in heat dissipation effect and easy to maintain and replace. Meanwhile, the heat pump system is additionally provided with the bypass valve, so that the pressure can be released to a low-pressure side in time when the high pressure of the system is too high, and the running safety of the system is improved; the heat pump system is additionally provided with the natural subcooler, so that the working medium can generate larger supercooling degree before entering the expansion valve by utilizing an atmospheric natural cold source, and the running performance of the system is improved.
Drawings
The utility model is further described with reference to the accompanying drawings and the specific embodiments.
Fig. 1 is a system flowchart according to a first embodiment of the present invention.
Fig. 2 is a structural view of a modular indoor natural convection heat exchange unit according to a first embodiment of the present invention.
Fig. 3 is a system flowchart of the second embodiment of the present invention.
Fig. 4 is a system flowchart of a third embodiment of the present invention.
Fig. 5 is a system flow chart of a fourth embodiment of the present invention.
Fig. 6 is a partial enlarged view of B-B in fig. 2.
The reference numbers in the figures illustrate:
1A, 1B-indoor natural convection heat exchange unit, 2A, 2B-throttling element at inlet of indoor natural convection heat exchange unit, 3A, 3B-stop valve at inlet of indoor natural convection heat exchange unit, 4-supply three-way valve, 5-bypass valve, 6-four-way valve, 7-compressor, 8-outdoor heat exchanger, 9-heating throttling element, 10-natural subcooler, 11-distribution three-way valve, 12-double-flow-direction flash evaporator, 13-air-cooled heat pump cold and hot water unit
Detailed Description
Example one
Referring to fig. 1 and 2, this embodiment is a single-stage compression heat pump system with two modular indoor natural convection heat exchange units connected in parallel.
The heat pump system is used by connecting two indoor natural convection heat exchange units 1A and 1B in parallel, the indoor natural convection heat exchange units are of similar modular structures and comprise a pipe 1A rolled by a thin steel plate and a plurality of heat dissipation strips 1B, the pipe 1A is bent into a snake-shaped pipe shape, the heat dissipation strips 1B are welded on two sides of the pipe 1A at certain intervals, and the pipe 1A is welded at the joint of the heat dissipation strips 1B and the pipe 1A.
The heat pump system comprises an indoor natural convection heat exchange unit 1A, a throttling element 2A and a stop valve 3A at an inlet of the indoor natural convection heat exchange unit, an indoor natural convection heat exchange unit 1B, a throttling element 2B and a stop valve 3B at an inlet of the indoor natural convection heat exchange unit, a supply three-way valve 4, a bypass valve 5, a four-way valve 6, a compressor 7, an outdoor heat exchanger 8, a heating throttling element 9, a natural subcooler 10, a distribution three-way valve 11 and the like; the pipeline formed by connecting the throttling element 2A and the stop valve 3A in parallel at the inlet of the indoor heat exchange unit 1A and the pipeline formed by connecting the throttling element 2B and the stop valve 3B in parallel at the inlet of the indoor heat exchange unit 1B are combined together and connected to the port e of the three-way valve 4; after the outlet pipelines of the indoor heat exchange unit 1A and the indoor heat exchange unit 1B are converged, the converged pipelines are connected to an i port of the distribution three-way valve 11; the g port of the distribution three-way valve 11 is converged with the q port of the supply three-way valve 4 and then connected to the n port of the four-way valve 6, the m port of the distribution three-way valve 11 is connected with the o port of the natural subcooler 10, the p port of the natural subcooler 10 is connected to the h port of the outdoor heat exchanger 8 after passing through the heating throttling element 9, and meanwhile, the h port of the outdoor heat exchanger 8 is also connected to the y port of the supply three-way valve 4; an s port of the four-way valve 6 is connected with an air inlet of the compressor, a d port thereof is connected with an air outlet of the compressor, and a w port thereof is connected with an f port of the outdoor heat exchanger 8; the bypass valve 5 is connected in parallel between the n port of the four-way valve 6 and the h port of the outdoor heat exchanger 8.
When the heat pump operates in the heating mode, the shutoff valves 3A and 3B are opened, the q port and the e port of the supply three-way valve 4 are communicated, the m port and the i port of the distribution three-way valve 11 are communicated, and the d port and the n port and the s port and the w port of the four-way valve 6 are communicated, respectively. High-temperature and high-pressure working medium gas discharged by a compressor 7 enters the indoor heat exchange units 1A and 1B through the four-way valve 6 and the supply three-way valve 4, the working medium is changed into liquid after being radiated to indoor air, the working medium flows through the distribution three-way valve 11 after being converged at the outlets of the indoor heat exchange units 1A and 1B, the working medium enters the natural subcooler 10, the working medium is changed into subcooled liquid after being radiated to outdoor air, the working medium is reduced in pressure through the heating throttling element 9 and then enters the outdoor heat exchanger 8, the working medium is changed into superheated gas after absorbing the heat of the outdoor air, and the superheated gas is sucked by the compressor 7 through the four-way valve 6, so that the heating working cycle is completed. The air after heat exchange by the natural subcooler 10 is sucked by the outdoor heat exchanger 8, so that the heat of the air is subcooled and dissipated by the working medium, and the air is recycled in the outdoor heat exchanger 8.
When the heat pump is operated in the cooling mode, the shutoff valves 3A and 3B are closed, the y port and the e port of the supply three-way valve 4 are communicated, the g port and the i port of the distribution three-way valve 11 are communicated, and the d port and the w port and the s port and the n port of the four-way valve 6 are communicated, respectively. High-temperature and high-pressure working medium gas discharged by a compressor 7 enters an outdoor heat exchanger 8 through a four-way valve 6, the working medium is changed into liquid after being radiated for outdoor air, and is changed into superheated gas after absorbing indoor air heat through a three-way valve 4 and then enters indoor heat exchange units 1A and 1B after being throttled and reduced in pressure through throttling elements 2A and 2B respectively, the working medium is converged at outlets of the indoor heat exchange units 1A and 1B and then flows through a distribution three-way valve 11, and the superheated gas is sucked by the compressor 7 through the four-way valve 6, so that the refrigeration working cycle is completed.
The on-off of the bypass valve of the heat pump system is controlled by the high pressure of the system, when the high pressure of the system is higher than a set value, the bypass valve is opened, and working medium on the high pressure side is quickly discharged to the low pressure side, so that the high pressure of the system is prevented from being overhigh, and the running safety of the system is ensured; the start-up and shut-down or energy regulation of the compressor of the heat pump system is controlled by the indoor temperature, when the indoor temperature reaches a set value, the compressor is stopped or in an energy regulation running state, otherwise, the compressor is started or in a normal running state; the natural subcooler of the heat pump system can utilize an atmospheric natural cold source to enable the working medium to generate larger supercooling degree before entering the expansion valve, and the running performance of the system is improved.
Example two
Referring to fig. 3, this embodiment is a single-stage compression heat pump system with a centralized throttling element at the inlet of the indoor natural convection heat exchange unit. Compared with the first embodiment, the throttling element 2A at the inlet of the indoor heat exchange unit 1A, the throttling element 2B at the inlet of the indoor heat exchange unit 1B and the like are combined into the throttling element 2, and the throttling element 2 is moved to a front pipeline of a y port of the supply three-way valve 4; while omitting the natural supercooler 10. The rest is the same as the first embodiment.
EXAMPLE III
Referring to fig. 4, the embodiment is a two-stage compression heat pump system with two modular indoor natural convection heat exchange units connected in parallel. Compared with the two embodiments, the compressor 7 adopts a single-machine two-stage compressor or a compressor with an air supplement port, and a two-flow flash evaporator 12 is additionally arranged; the k port of the flash device 12 is connected with the air supplement port of the compressor, the throttling element 2 is moved to a pipeline between the r port of the flash device 12 and the h port of the outdoor heat exchanger 8, and the s port of the flash device 12 is respectively connected with the y port of the supply three-way valve 4 and the m port of the distribution three-way valve 11 after passing through the throttling element 9. The rest is the same as the embodiment.
Example four
Referring to fig. 5, the embodiment is a heat pump heating system in which modular indoor natural convection heat exchange units with air-cooled heat pump cold and hot water units as cold and heat sources are connected in parallel. Compared with the first embodiment, the air-cooled heat pump cold and hot water unit 13 is used for replacing the part of the heat pump system for supplying the working medium to the indoor natural convection heat exchange unit 1, and the heat exchange medium in the pipe of the indoor natural convection heat exchange unit 1 is water instead of the working medium. Two or more indoor natural convection heat exchange units are connected in parallel and then are respectively connected with a water supply pipe and a water return pipe of the air-cooled heat pump cold and hot water unit 13.
Claims (10)
1. The utility model provides a heat pump system of indoor natural convection heat transfer unit of modular which characterized in that: the heat pump system comprises a plurality of indoor natural convection heat exchange modules, a supply three-way valve and a distribution three-way valve which are connected in parallel; each indoor natural convection heat exchange module comprises an indoor natural convection heat exchange unit, a throttling element and a stop valve; in each indoor natural convection heat exchange module, one end of a pipeline in which a throttling element and a stop valve are connected in parallel is connected with an inlet of an indoor natural convection heat exchange unit, and the other end of the pipeline is converged on a supply three-way valve together with the throttling element and the stop valve of other indoor natural convection heat exchange modules connected in parallel; the outlet ends of the indoor natural convection heat exchange units of each indoor natural convection heat exchange module are converged on the distribution three-way valve;
the indoor natural convection heat exchange unit consists of a thin steel plate rolled pipe and a plurality of heat dissipation strips, and the thin steel plate rolled pipe is in a snake-shaped tubular shape; the plurality of radiating strips are arranged on two sides or one side of the tube rolled by the thin steel plate and are tightly connected with the surface of the tube rolled by the thin steel plate.
2. The heat pump system of a modular indoor natural convection heat exchange unit of claim 1, wherein: the joint of the heat dissipation strip and the pipe rolled by the thin steel plate is connected through welding materials or sealing materials.
3. The heat pump system of a modular indoor natural convection heat exchange unit of claim 1, wherein: the heat pump system also comprises a bypass valve, a four-way valve, a compressor, an outdoor heat exchanger, a heating throttling element and a natural subcooler; the distributing three-way valve is converged with the supplying three-way valve and then connected to the four-way valve; the distribution three-way valve is also connected with a natural subcooler, the natural subcooler is connected to an outdoor heat exchanger after passing through a heating throttling element, and the outdoor heat exchanger is connected to the supply three-way valve; the four-way valve is connected with the air inlet of the compressor and the air outlet of the compressor and is also connected to the outdoor heat exchanger; the bypass valve is connected in parallel between the four-way valve and the outdoor heat exchanger.
4. The heat pump system of a modular indoor natural convection heat exchange unit of claim 1, wherein: the number of the indoor natural convection heat exchange units of each indoor natural convection heat exchange module is one or more, and the indoor natural convection heat exchange units are connected in parallel, in series or in series-parallel.
5. The heat pump system of modular indoor natural convection heat exchange unit of claim 4, wherein: when more than two indoor natural convection heat exchange units of the heat pump system are connected in parallel, the throttling elements are distributed at the inlet of each indoor natural convection heat exchange unit or are intensively arranged on a pipeline for supplying a three-way valve.
6. The heat pump system of a modular indoor natural convection heat exchange unit according to claim 1, 4 or 5, wherein: the indoor natural convection heat exchange unit and the throttling element of the heat pump system can be arranged separately, or combined into a whole.
7. The heat pump system of a modular indoor natural convection heat exchange unit of claim 3, wherein: the bypass valve of the heat pump system can be omitted.
8. The heat pump system of a modular indoor natural convection heat exchange unit of claim 3, wherein: the compressor of the heat pump system is a single-stage compressor, or a compressor with an air supplement port or a single-machine two-stage compressor; if the compressor is provided with an air supplement port or a single-machine secondary compressor, the heat pump needs to be matched with an air supplement flow path.
9. The heat pump system of a modular indoor natural convection heat exchange unit of claim 3, wherein: the natural subcooler of the heat pump system can be omitted.
10. The heat pump system of a modular indoor natural convection heat exchange unit of claim 1, wherein: the heat pump system can replace the part for supplying working medium to the indoor natural convection heat exchange unit by an air-cooled heat pump cold and hot water unit.
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| CN202120055069.XU CN216048463U (en) | 2021-01-08 | 2021-01-08 | Heat pump system of modular indoor natural convection heat exchange unit |
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| CN202120055069.XU CN216048463U (en) | 2021-01-08 | 2021-01-08 | Heat pump system of modular indoor natural convection heat exchange unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115235145A (en) * | 2022-07-21 | 2022-10-25 | 北京工业大学 | Heat pump system with sleeve pipe fin type heat exchanger |
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2021
- 2021-01-08 CN CN202120055069.XU patent/CN216048463U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115235145A (en) * | 2022-07-21 | 2022-10-25 | 北京工业大学 | Heat pump system with sleeve pipe fin type heat exchanger |
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