CN221975447U - Heat recoverer assembly - Google Patents
Heat recoverer assembly Download PDFInfo
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- CN221975447U CN221975447U CN202420019826.1U CN202420019826U CN221975447U CN 221975447 U CN221975447 U CN 221975447U CN 202420019826 U CN202420019826 U CN 202420019826U CN 221975447 U CN221975447 U CN 221975447U
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 80
- 239000003507 refrigerant Substances 0.000 claims abstract description 32
- 238000011084 recovery Methods 0.000 claims abstract description 30
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 abstract description 16
- 230000005494 condensation Effects 0.000 abstract description 14
- 238000009833 condensation Methods 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 15
- 238000001816 cooling Methods 0.000 description 6
- 238000004781 supercooling Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000013526 supercooled liquid Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses a heat recoverer assembly, which is used on refrigeration cycle and comprises a condensation heat exchanger and a flow regulating valve; wherein the flow regulating valve is used for regulating the flow passing through the condensing heat exchanger after the condensing heat exchanger outlet. According to the heat recoverer assembly, the flow regulating valve is arranged at the outlet of the condensing heat exchanger, so that the heat exchange amount regulating effect of the refrigerant in the condensing heat exchanger is better; the condensing pressure regulating valve is arranged, so that the control accuracy and the condensing temperature are ensured to be relatively stable, the application range is wider, and the heating efficiency is improved; the heat recovery assembly outlet is arranged at the condenser inlet, which is beneficial to adapting to wider climatic conditions and keeping the state of the cold side relatively constant.
Description
Technical Field
The utility model relates to the field of refrigeration systems, in particular to a heat recoverer assembly.
Background
At present, a heat recovery coil is adopted in the enthalpy difference laboratory part, the exhaust heat of a compressor is utilized to heat a laboratory room, and a gas flow heat recoverer is controlled by the heat recovery coil through a split three-way valve at the outlet of the compressor, so that the heat recovery amount is changed.
Referring to fig. 1, in the prior patent 201010505235.8, a device comprising an indoor air tank, an outdoor air tank, an indoor condenser and an indoor compressor unit are arranged outside the indoor air tank, an outdoor condenser and an outdoor compressor unit are arranged outside the outdoor air tank, an indoor condensing heat exchanger is also arranged inside the indoor air tank, an outdoor condensing heat exchanger is arranged inside the outdoor air tank, and an electric three-way valve 13 (see fig. 1) is arranged between the indoor condenser and a communication pipeline of the indoor compressor unit and between the outdoor condenser and a communication pipeline of the outdoor compressor unit, so that the device in the patent can recover and reuse generated heat energy, and the cost is reduced while the electric energy is saved.
However, there are two problems in this way, the first is that the flow is controlled by controlling the flow dividing three-way valve at the inlet, and the heat exchanging area of the condensing pressure receiving condenser and the heat recoverer is affected together, so that the heat exchanging temperature difference is not constant, and thus the heat recovery heat is also not constant. Secondly, the heat recovery and the condenser are under the same pressure, if the environment temperature of the condenser is lower, the condensing pressure is lower, the heat recovery pressure is also reduced, at the moment, only the heat of the variation of the superheat degree of the refrigerant gas can be utilized, the condensing heat of the refrigerant cannot be utilized, and the heat recovery effect is greatly reduced.
Moreover, when heating is required in a laboratory, the temperature control precision of the laboratory is much higher than that of a normal room, the temperature control precision is generally required to be about +/-0.1K, otherwise, the uncertainty of unit performance evaluation can be increased, and the heat recovery device of the conventional enthalpy difference laboratory air conditioning system cannot generally meet the requirement of the temperature control precision of the laboratory.
Therefore, a technical solution capable of overcoming the above-mentioned problems is needed.
Disclosure of utility model
In order to overcome the defects in the prior art, the utility model aims to provide a heat recoverer assembly for solving the technical problems.
In order to achieve the purpose, the utility model adopts the following technical scheme: a heat recovery assembly comprising a condensing heat exchanger, a flow regulating valve and a condensing pressure regulating valve, wherein the flow regulating valve is used to regulate flow through the condensing heat exchanger after the condensing heat exchanger outlet;
The inlet of the condensing pressure regulating valve is connected with the inlet of the condensing heat exchanger, the outlet of the condensing pressure regulating valve is connected with the outlet of the flow regulating valve, the condensing pressure regulating valve is used for regulating the pressure of the inlet of the condensing heat exchanger to be not lower than a set threshold value;
the heat exchange medium in the heat recovery device component is refrigerant, the refrigerant at the inlet of the condensing heat exchanger is superheated gas, and the degree of superheat is more than 0K.
Preferably, the flow regulating valve is an electronic flow regulating valve.
Preferably, when the heat recoverer assembly is applied in a refrigeration cycle, the outlet of the flow regulating valve is connected with the inlet of a condenser in the refrigeration cycle.
Preferably, the condensation heat exchanger and the flow regulating valves form a first branch, the first branch is arranged in parallel in multiple groups, and each flow regulating valve independently regulates the flow of the corresponding condensation heat exchanger.
According to the heat recoverer assembly, the flow regulating valve is arranged at the outlet of the condensing heat exchanger, and the two-phase heat exchange area in the condensing heat exchanger is changed by regulating the flow, so that the regulation linearity is ensured; the condensing pressure regulating valve is used for limiting the inlet pressure of the condensing heat exchanger not to be lower than a limiting threshold value, so that the condensing pressure is not influenced by the environment and is relatively constant, the heat exchange temperature difference of the condensing heat exchanger is ensured, the condensing heat exchanger is ensured to keep phase change heat exchange, and the heat exchange efficiency of the heat recovery assembly is improved; by arranging the heat exchanger assembly at the condenser inlet, the influence of the heat recovery side on the cold supply side is isolated by the condenser.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings described below are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a structure of a prior art patent;
FIG. 2 is a schematic view of a heat recovery assembly according to the present utility model;
fig. 3 is a schematic structural view of a refrigeration cycle according to the present utility model.
In the figure: 1. a compressor; 3. a condenser; 4. an expansion valve; 5. an evaporator; 6. a condensing heat exchanger; 7. a flow regulating valve; 9. condensing pressure regulating valve.
Detailed Description
The present utility model will now be described in further detail with reference to the accompanying drawings, wherein the embodiments described are some, but not all embodiments of the utility model. 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 "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the above description, descriptions of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Fig. 2 is a schematic view of the overall structure of a heat recoverer assembly in accordance with the present utility model.
Referring to fig. 2, a heat recovery unit includes a condensing heat exchanger 6 and a flow rate adjusting valve 7 connected after an outlet of the condensing heat exchanger 6, the flow rate adjusting valve 7 being capable of adjusting a flow rate of the condensing heat exchanger 6 at the outlet of the condensing heat exchanger 6. When the heat recovery device is used, the heat exchange medium in the heat recovery device component is refrigerant, the refrigerant at the inlet of the condensing heat exchanger is superheated gas, and the degree of superheat is more than 0K.
The condensing heat exchanger also comprises a condensing pressure regulating valve 9, wherein the inlet of the condensing pressure regulating valve 9 is connected with the inlet of the condensing heat exchanger in parallel, and the outlet of the condensing pressure regulating valve 9 is connected with the outlet of the flow regulating valve in parallel. The condensing pressure regulating valve 9 is used to keep the pressure at the inlet of the condensing heat exchanger 6 not below a set threshold.
Preferably, the flow regulating valve 7 is an electronic flow regulating valve capable of stepless regulation, and the upper opening limit of the electronic flow regulating valve ensures that the supercooling degree of the outlet is more than 2K.
Preferably, when the heat recovery assembly is used in a refrigeration cycle, its outlet is connected to the inlet of a condenser in the refrigeration cycle.
The heat recoverer assembly can be used for refrigeration cycle, and the condensation heat exchanger 6 and the flow regulating valve 7 in the heat recoverer assembly form a first branch, the first branch can be used in parallel in a plurality of groups, and when the branches are used in parallel, each branch flow regulating valve 7 independently regulates the flow flowing through the inlet condensation heat exchanger 6.
The use of the heat recoverer assembly in a refrigeration cycle is exemplified below, but the structure of the refrigeration cycle to which the heat recoverer assembly of the present utility model is applied is not limited to the following structure.
Implementation case:
As shown in fig. 3, a refrigeration cycle, on which the above-described heat recoverer assembly is provided, includes a compressor 1, a condenser 3, an expansion valve 4, and an evaporator 5, wherein the compressor 1, the condenser 3, the expansion valve 4, and the evaporator 5 are sequentially connected, and can be used for a refrigerant condensing cycle.
The heat recoverer assembly is connected between the compressor 1 and the condenser 3, preferably, the condensing heat exchanger 6 of the heat recoverer assembly is connected between the outlet of the compressor 1 and the inlet of the condenser 3, the flow regulating valve 7 is arranged at the outlet of the condensing heat exchanger 6, namely, the condensing heat exchanger 6 and the flow regulating valve 7 are connected in series between the compressor 1 and the condenser 3, the compressor 1, the condensing heat exchanger 6, the flow regulating valve 7, the condenser 3, the expansion valve 4 and the evaporator 5 are sequentially connected to form a heating cycle, the refrigerant can enter the heat recoverer assembly as heat exchange medium, the refrigerant at the inlet of the condensing heat exchanger 6 is overheated gas, and the flow of the condensing heat exchanger 6 can be controlled by the flow regulating valve 7.
The inlet of the condensing pressure regulating valve 9 is connected with the inlet of the condensing heat exchanger 6 in parallel, the outlet of the condensing pressure regulating valve 9 is connected with the outlet of the flow regulating valve 7 in parallel, and when the condensing heat exchanger 6 is connected with the outlet of the compressor 1, the inlet of the condensing pressure regulating valve 9 is connected with the outlet of the compressor 1, and the outlet of the condensing pressure regulating valve 9 is connected with the inlet of the condenser 3.
The condensing pressure regulating valve 9 can keep the condensing pressure at the outlet of the compressor 1 not lower than a set threshold value, so that when the condensing heat exchanger 6 is arranged between the outlet of the compressor 1 and the inlet of the condenser 3, the condensing temperature of the refrigerant of the condensing heat exchanger 6 is ensured not to be lower than a set temperature, for example, a certain value of 45-60 ℃, and the normal operation of the condensing heat exchanger 6 in a higher temperature range is ensured. Specifically, in the present embodiment, the compressor 1, the condensing pressure adjusting valve 9, the condenser 3, the expansion valve 4, and the evaporator 5 are connected in this order, the condensing heat exchanger 6 inlet is provided between the compressor 1 outlet and the condensing pressure adjusting valve 9 inlet, and the pressure of the condensing heat exchanger 6 inlet, that is, the condensing pressure of the condensing heat exchanger 6 can be constant by the condensing pressure adjusting valve 9. Thus, when the flow of the condensing heat exchanger 6 is changed, the condensing temperature of the condensing heat exchanger 6 is basically maintained above 45 ℃, and the heating quantity is favorably adjusted.
The flow rate of the heating load (condensing heat exchanger 6) in the heating cycle is adjustable by a flow rate adjusting valve 7.
Preferably, the flow rate adjusting valve 7 is an electronic expansion valve, and can steplessly adjust the flow rate of the refrigerant flowing through the condensing heat exchanger 6, thereby changing the heat release amount of the condensing heat exchanger 6.
When the refrigerant circulates in the condensing heat exchanger 6, the high-temperature and high-pressure gaseous refrigerant at the surplus part of the outlet of the compressor 1 can be reduced in pressure through the condensing pressure regulating valve 9, is mixed with the outflow liquid of the condensing heat exchanger 6, is sent to the condenser 3 for cooling, becomes a liquid refrigerant with medium temperature and high pressure after cooling, enters the gas-liquid mixture (more liquid) with low temperature and low pressure through throttling and reducing pressure of the expansion valve 4 (throttling part), is gasified after absorbing heat in an environmental heat source through the evaporator 5, becomes a gaseous state, and then returns to the compressor 1 for continuous operation, and the refrigerant circulation is completed. During this process, the evaporator 5 can be used to absorb ambient heat (release excess cold in the cycle) for heating at the load side of the laboratory (condensing heat exchanger 6). When the refrigeration cycle is connected with other cooling loads, heat can be absorbed from the cooling loads, and heat recovery among the loads can be realized.
The superheat degree of the inlet of the condensing heat exchanger 6 is larger than 0K, so that the condensing heat exchanger 6 is in the process of condensing heat release in the heating cycle and can be used for heat recovery. Specifically, the inlet of the condensing heat exchanger 6 is connected to the outlet of the compressor 1, and the superheat degree is greater than 0K.
Further, in some embodiments, when the first branch circuits of the heat recoverer assembly are arranged in parallel, only one condensing pressure regulating valve 9 is provided, that is, the condensing pressure regulating valve is used as the second branch circuit, and the second branch circuit makes the condensing temperatures of the heating circuits of all the condensing heat exchangers 6 at the same temperature, so that simultaneous heating or heat recovery of a plurality of different loads can be realized.
In some embodiments, in some refrigeration cycles, an oil separator may be further connected to the rear of the compressor 1, a filter may be added to the inlet of the flow rate adjusting valve 7, and a maintenance valve may be further added to the first branch path formed by the condensation heat exchanger 6 and the condensation pressure adjusting valve 9 of the heat recoverer assembly, which is not limited in this case, so long as the flow rate adjusting valve 7 can adjust the flow rate of the condensation heat exchanger 6. Such as: a maintenance valve may be provided between the condensing heat exchanger 6 and the flow regulating valve 7, and a maintenance valve may be provided at the outlet of the flow regulating valve 7.
Further, in some other embodiments, when the oil separator is connected to the rear of the compressor 1, the inlet of the condensation heat exchanger 6 may be connected to the outlet of the oil separator, and the superheat degree is greater than 0K.
Working principle:
In the present embodiment, the condensation heat exchanger 6 is a heat recovery device for heating a laboratory room, and the compressor 1, the condensation heat exchanger 6, the condenser 3, the expansion valve 4, and the evaporator 5 form a heat pump cycle when the condensation heat exchanger 6 is operated. The refrigerant can be compressed in the compressor 1 to form high-pressure overheat gaseous refrigerant, a part of the high-temperature high-pressure gaseous refrigerant is sent into the condensing heat exchanger 6, the refrigerant is condensed and released in the condensing heat exchanger 6 and used for heating a certain load in a heating ventilation air conditioning test chamber, the outlet of the refrigerant is supercooled liquid, and then the refrigerant flows out through the flow regulating valve 7; the flow regulating valve 7 can regulate the flow of refrigerant through the condensing heat exchanger 6. When the opening of the flow regulating valve is smaller, more supercooled liquid is accumulated in the condenser heat exchanger 6, the temperature difference between the liquid temperature and the heat exchange medium at the other side is reduced and approaches to no temperature difference, and the heat exchange capacity is reduced; when the flow regulating valve is opened, the supercooled liquid flows out faster, the space occupied by the two phases and the overheated refrigerant in the condensing heat exchanger 6 rises, the temperature difference with the load increases, and accordingly the heat release capacity rises. Therefore, by adjusting the opening of the flow rate adjustment valve 7, the flow rate of the condensation heat exchanger can be changed, and the heating amount of the condensation heat exchanger 6 for a predetermined load can be changed. When the flow regulating valve 7 is continuously closed, the condensing heat exchanger is fully filled with liquid refrigerant and reaches a heat balance state with the heat exchange medium at the other side, so that the heat release amount is 0.
Furthermore, when the flow rate regulating valve is an electronic flow rate regulating valve, the heat exchange amount of the condensing heat exchanger 6 can be steplessly regulated. Too large an opening of the regulating valve may cause a decrease in the degree of supercooling of the outlet of the condensing heat exchanger 6, and when the outlet becomes a two-phase refrigerant, the heat exchange amount and the flow rate do not have a linear relationship, which may cause disturbance of the regulation control. Therefore, the upper limit opening of the flow rate regulating valve is limited by the supercooling degree, and when the supercooling degree is reduced to 2K, the upper limit of the opening of the regulating valve is reduced or the regulating valve is closed to secure the linearity of the regulation.
Since the flow rate is basically constant after the compressor 1 is started and the opening of the flow rate regulating valve 7 is variable, at this time, the high-temperature and high-pressure gaseous refrigerant in the surplus part of the outlet of the compressor 1 can flow out through the condensing pressure regulating valve 9, be mixed with the outflow liquid of the condensing heat exchanger 6, and be sent to the condenser 3 for cooling. The opening of the condensing pressure regulating valve only ensures that the condensing heat exchanger 6 inlet pressure is not below a specified threshold. The heat release amount of the condensing heat exchanger is small, the opening of the outlet flow regulating valve is reduced, at the moment, the opening of the condensing pressure regulating valve is increased, the amount of bypass gas discharged to the condenser is increased, and vice versa, so that the condensing temperature of the condensing heat exchanger can be constant due to the negative feedback relation between the condensing pressure regulating valve and the inlet pressure of the condensing heat exchanger 6, and the condensing temperature of the condensing heat exchanger is determined.
In the refrigeration cycle, the temperature of the refrigerant liquid flowing out of the flow rate regulating valve 7 is affected by the temperature of the heated load, and in order to avoid its influence on the capacity of the refrigeration cycle on the cold side, a heat recovery assembly is provided at the inlet of the condenser 3. Therefore, no matter how much heat is exchanged by the heat recovery component, all the refrigerant flows through the condenser 3, the temperature of the refrigerant liquid at the outlet of the condenser 3 is basically influenced by the temperature of the environment (cooling water), and is irrelevant to the load temperature and relatively constant, so that the capacity of the cold supply side of the refrigeration cycle is not influenced by the heat recovery side, and the refrigeration cycle is favorable for adapting to wider working conditions. For example, when the room temperature is high, the temperature of the liquid at the outlet of the condensing heat exchanger 6 may be high, if the liquid is mixed with the liquid at the outlet of the condenser 3, the evaporation or supercooling degree of part of the liquid may be reduced, and the flow rate at the inlet of the expansion valve 4 may be unstable; while at lower room temperatures, the liquid temperature at the outlet of the condensing heat exchanger 6 may be lower, resulting in a significant increase in the degree of subcooling at the inlet of the expansion valve 4, resulting in the degree of subcooling at the cold feed inlet being affected by the heating end. According to the embodiment, the heating load outlet liquid and the surplus gas at the outlet of the compressor are mixed and then enter the condenser 3, so that the outlet temperature is relatively constant, the stable operation of the cooling platform is facilitated, and the adaptability is wider.
What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (4)
1. A heat recovery assembly comprising a condensing heat exchanger, a flow regulating valve and a condensing pressure regulating valve, wherein:
The flow regulating valve is used for regulating the flow passing through the condensing heat exchanger after the condensing heat exchanger is at the outlet;
The inlet of the condensing pressure regulating valve is connected with the inlet of the condensing heat exchanger, the outlet of the condensing pressure regulating valve is connected with the outlet of the flow regulating valve, the condensing pressure regulating valve is used for regulating the pressure of the inlet of the condensing heat exchanger to be not lower than a set threshold value;
the heat exchange medium in the heat recovery device component is refrigerant, the refrigerant at the inlet of the condensing heat exchanger is superheated gas, and the degree of superheat is more than 0K.
2. A heat recuperator assembly as recited in claim 1, wherein the flow regulator valve is an electronic flow regulator valve.
3. A heat recovery unit assembly according to claim 2, wherein the heat recovery unit assembly outlet is connected to the inlet of a condenser in a refrigeration cycle.
4. A heat recovery unit assembly according to any one of claims 1-3, wherein the condensing heat exchanger and the flow regulating valves form a first branch, the first branch being arranged in parallel in groups, each of the flow regulating valves independently regulating the flow of the condensing heat exchanger corresponding thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420019826.1U CN221975447U (en) | 2024-01-03 | 2024-01-03 | Heat recoverer assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420019826.1U CN221975447U (en) | 2024-01-03 | 2024-01-03 | Heat recoverer assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221975447U true CN221975447U (en) | 2024-11-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420019826.1U Active CN221975447U (en) | 2024-01-03 | 2024-01-03 | Heat recoverer assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221975447U (en) |
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- 2024-01-03 CN CN202420019826.1U patent/CN221975447U/en active Active
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