CN112665205A - Nested double-overlapping cold-hot combined supply system - Google Patents
Nested double-overlapping cold-hot combined supply system Download PDFInfo
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- CN112665205A CN112665205A CN202011528863.8A CN202011528863A CN112665205A CN 112665205 A CN112665205 A CN 112665205A CN 202011528863 A CN202011528863 A CN 202011528863A CN 112665205 A CN112665205 A CN 112665205A
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Abstract
The invention belongs to the field of refrigeration and heating systems, and particularly discloses a nested double-cascade combined cooling and heating system which comprises a compressor A, a compressor B, an evaporator A, an evaporator B, an evaporative condenser A, an evaporative condenser B, a condenser A and a condenser B; the outlet end of the evaporator A is sequentially connected with the inlet end of the heat regenerator and the inlet end of the compressor B through pipelines; the outlet end of the compressor B is respectively connected with the inlet end of the condenser A and the inlet end of the evaporative condenser B through pipelines; the outlet end of the evaporative condenser B is sequentially connected with the compressor A and the condenser B through pipelines; the outlet ends of the condenser A and the evaporative condenser B are connected with a gas-liquid separator through pipelines; the top end of the gas-liquid separator is connected with the top end of the evaporative condenser A through a pipeline, and the bottom end of the gas-liquid separator is connected with a high-boiling-point refrigerant liquid storage device through a pipeline; the invention can realize the comprehensive and efficient utilization of cold and heat and achieve the aim of energy saving.
Description
Technical Field
The invention relates to the field of refrigeration and heating systems, in particular to a nested double-overlapping cold and heat combined supply system.
Background
The self-cascade refrigerating system is a refrigerating system using multi-element non-azeotropic mixed refrigerant, it uses a single compressor, the mixed refrigerant is compressed and passed through once or several times of throttling and separation in the course of circulation, so that the mixed refrigerant with more than two components can be flowed and transferred energy simultaneously in the whole refrigerating cycle, and the cascade can be implemented between high boiling point component and low boiling point component, so that the goal of preparing low temp. can be reached, and the quantity of heat produced by it can be very considerable, if it can be effectively recovered, the goal of high-efficiency utilization of cold and heat quantity can be reached.
The existing self-cascade refrigeration system has the following problems during operation:
(1) the heat generated by the operation of a self-cascade refrigeration system is mostly discharged into the air, causing heat waste and exacerbating the heat island effect.
(2) If the condensation end of the auto-cascade refrigeration system is directly used for preparing hot water with higher temperature, the condensation temperature needs to be increased, and the increase of the condensation temperature can reduce the refrigeration coefficient, so that the system is poor in economical efficiency.
Disclosure of Invention
The present invention provides a nested dual-stacked cooling and heating combined supply system to solve the problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a nested double-cascade combined cooling and heating system comprises a compressor A, a compressor B, an evaporator A, an evaporator B, an evaporative condenser A, an evaporative condenser B, a condenser A and a condenser B;
the outlet end of the evaporator A is sequentially connected with the inlet end of the heat regenerator and the inlet end of the compressor B through pipelines;
the outlet end of the compressor B is respectively connected with the inlet end of the condenser A and the inlet end of the evaporative condenser B through pipelines;
the outlet end of the evaporative condenser B is sequentially connected with the compressor A and the condenser B through pipelines;
the outlet ends of the condenser A and the evaporative condenser B are connected with a gas-liquid separator through pipelines;
the top end of the gas-liquid separator is connected with the top end of the evaporative condenser A through a pipeline, the bottom end of the gas-liquid separator is connected with a high-boiling-point refrigerant liquid storage device through a pipeline, and the high-boiling-point refrigerant liquid storage device is connected with the bottom end of the evaporative condenser A through a pipeline;
the bottom end of the evaporative condenser A is sequentially connected with the low-boiling-point refrigerant reservoir, the heat regenerator and the evaporator A, and the top end of the evaporative condenser A is connected with the evaporator B.
Preferably, an expansion valve A is arranged in a pipeline connecting the high-boiling-point refrigerant reservoir and the evaporative condenser A; an expansion valve B is arranged in a pipeline connecting the heat regenerator and the evaporator A; the outlet end of the condenser B is connected with the evaporative condenser B through a pipeline, and an expansion valve C is arranged in the pipeline.
Preferably, a stop valve A is arranged in a pipeline connecting the compressor B and the condenser A; a stop valve B is arranged in a pipeline connecting the evaporative condenser A and the evaporator B; the evaporative condenser A and the compressor B are connected through a pipeline, and a stop valve C is arranged in the pipeline.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention overcomes the defect that the refrigerating capacity is reduced when the condensation temperature of the auto-cascade refrigeration cycle is higher by adding the left-end refrigeration cycle, and improves the system performance.
2. The invention has less influence by outside air parameters during operation, has more stable operation, can obtain hot water with higher temperature, can supply heat for the personnel activity room in winter and refrigerate in summer, and can fully utilize the energy in the system.
3. The invention improves the evaporation temperature of the left-end refrigeration cycle by utilizing the condensation heat of the auto-cascade refrigeration cycle system, does not have the phenomenon of frosting on an evaporator compared with a single air source heat pump, simultaneously utilizes the cold and heat in the system, realizes the comprehensive and efficient utilization of the cold and heat, and further achieves the purpose of energy conservation.
Drawings
FIG. 1 is a schematic diagram of a refrigeration cycle of the present invention;
FIG. 2 is a schematic diagram of a winter mode of the present invention;
FIG. 3 is a schematic diagram of a summer mode of the present invention;
fig. 4 is a schematic diagram of a transitional seasonal mode of the present invention.
In the figure: 1-evaporator A; 2-a heat regenerator; 3-a low boiling point refrigerant reservoir; 4-evaporative condenser A; 5-high boiling point refrigerant reservoir; 6-gas-liquid separator; 7-evaporator B; 8-condenser A; 9-evaporative condenser B; 10-condenser B; 11-compressor a; 12-compressor B; 13-stop valve a; 14-stop valve B; 15-stop valve C; 16-expansion valve a; 17-expansion valve B; 18-expansion valve C; a-a personnel activity room; b-a cold storage.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-4, the present invention provides a technical solution: a nested double-cascade combined cooling and heating system comprises a compressor A11, a compressor B12, an evaporator A1, an evaporator B7, an evaporative condenser A4, an evaporative condenser B9, a condenser A8 and a condenser B10;
the outlet end of the evaporator A1 is sequentially connected with the inlet end of the heat regenerator 2 and the inlet end of the compressor B12 through pipelines;
the outlet end of the compressor B12 is respectively connected with the inlet end of a condenser A8 and the inlet end of an evaporative condenser B9 through pipelines;
the outlet end of the evaporative condenser B9 is sequentially connected with a compressor A11 and a condenser B10 through pipelines;
the outlet ends of the condenser A8 and the evaporative condenser B9 are connected with the gas-liquid separator 6 through pipelines;
the top end of the gas-liquid separator 6 is connected with the top end of the evaporative condenser A4 through a pipeline, the bottom end of the gas-liquid separator 6 is connected with the high-boiling-point refrigerant liquid accumulator 5 through a pipeline, and the high-boiling-point refrigerant liquid accumulator 5 is connected with the bottom end of the evaporative condenser A4 through a pipeline;
the bottom end of the evaporative condenser A4 is sequentially connected with the low-boiling-point refrigerant reservoir 3, the heat regenerator 2 and the evaporator A1, and the top end of the evaporative condenser A4 is connected with the evaporator B7.
Further, an expansion valve a16 is arranged inside a pipeline connecting the high-boiling-point refrigerant reservoir 5 and the evaporative condenser a 4; an expansion valve B17 is arranged in a pipeline connecting the heat regenerator 2 and the evaporator A1; the outlet end of the condenser B10 is connected with an evaporative condenser B9 through a pipeline, and an expansion valve C18 is arranged inside the pipeline.
Further, a stop valve A13 is arranged inside a pipeline connecting the compressor B12 and the condenser A8; a stop valve B14 is arranged in a pipeline connecting the evaporative condenser A4 and the evaporator B7; the evaporative condenser A4 and the compressor B12 are connected through a pipeline, and a stop valve C15 is arranged inside the pipeline.
Fig. 1 is a schematic diagram of a refrigeration cycle of the present invention, which is divided into a winter mode, a summer mode, and a transitional season mode. Fig. 2, 3, and 4 are schematic diagrams of the three modes, respectively.
Fig. 2 is a schematic diagram of a winter mode of the present invention, in winter, the stop valves 13 and 15 are opened, the stop valve 14 (as shown in fig. 2) is closed, and after the refrigerant is compressed by the compressor 12, most of the refrigerant reaches the evaporative condenser 9 to exchange heat with the left-end refrigerant, and the heat is transferred to the condenser 10 to prepare hot water for daily use. A small part of refrigerant reaches a condenser 8 to exchange heat with air in a room to raise the temperature of the room, the refrigerant enters a gas-liquid separator 6 after being mixed, the high-boiling-point refrigerant is throttled by an expansion valve 16 after becoming liquid, then exchanges heat with the low-boiling-point refrigerant in an evaporative condenser 4 to make the low-boiling-point refrigerant become liquid and enter a liquid reservoir 3, the refrigeration house is refrigerated by a heat regenerator 2 and an expansion valve 17, and then the refrigerant is mixed with the high-boiling-point refrigerant from the evaporative condenser 4 through the heat regenerator 2 and then enters a compressor 12 to complete circulation. Thus, the residual heat of the operation of the refrigeration house is fully utilized;
fig. 3 is a schematic diagram of a summer mode of the present invention, in summer, the stop valves 13 and 15 are closed, the stop valve 14 (as shown in fig. 3) is opened, and after the refrigerant is compressed by the compressor 12, the refrigerant completely reaches the evaporative condenser 9 to exchange heat with the refrigerant at the left end, and the heat is transferred to the condenser 10 to prepare hot water for daily use. Then the refrigerant enters a gas-liquid separator 6, after the high-boiling-point refrigerant becomes liquid, the refrigerant is throttled by an expansion valve 16 and then exchanges heat with the low-boiling-point refrigerant in an evaporative condenser 4 to enable the low-boiling-point refrigerant to become liquid, the liquid enters a liquid accumulator 3, and the refrigeration of the refrigeration house is carried out through a heat regenerator 2 and an expansion valve 17. And the high boiling point refrigerant supplies residual cold to the room for refrigeration, which is equivalent to the same way of returning heat to the high boiling point refrigerant. Then mixed with the low boiling point refrigerant and enters the compressor 12 to complete the cycle. The difference with winter is that the condenser 8 stops supplying heat to the personnel activity room, but the evaporator 7 exchanges heat with the air in the personnel activity room to refrigerate the room. Thus, the residual cold of the refrigerator operation is fully utilized;
fig. 4 is a schematic diagram of a transitional seasonal mode of the present invention, during the transitional season, the stop valves 13 and 14 are closed, the stop valve 15 is opened, and cooling and heating to the room are stopped (as shown in fig. 4), when the refrigerant is compressed by the compressor 12, the refrigerant completely reaches the evaporative condenser 9 to exchange heat with the refrigerant at the left end, and the heat is transferred to the condenser 10 to prepare hot water for daily use. Then the refrigerant enters a gas-liquid separator 6, after the high boiling point refrigerant becomes liquid, the refrigerant is throttled by an expansion valve 16, then exchanges heat with the low boiling point refrigerant in an evaporative condenser 4 to enable the low boiling point refrigerant to become liquid, the liquid enters a liquid accumulator 3, and the refrigerant is refrigerated by a heat regenerator 2 and an expansion valve 17, then is mixed with the high boiling point refrigerant, and then enters a compressor 12 to complete circulation.
It is worth noting that: the whole device is controlled by the master control button, and the equipment matched with the control button is common equipment, so that the device belongs to the prior art, and the electrical connection relation and the specific circuit structure of the device are not repeated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a cold and hot antithetical couplet of nested formula is supplied system of overlapping which characterized in that: comprises a compressor A (11), a compressor B (12), an evaporator A (1), an evaporator B (7), an evaporative condenser A (4), an evaporative condenser B (9), a condenser A (8) and a condenser B (10);
the outlet end of the evaporator A (1) is sequentially connected with the inlet end of the heat regenerator (2) and the inlet end of the compressor B (12) through pipelines;
the outlet end of the compressor B (12) is respectively connected with the inlet end of the condenser A (8) and the inlet end of the evaporative condenser B (9) through pipelines;
the outlet end of the evaporative condenser B (9) is sequentially connected with the compressor A (11) and the condenser B (10) through pipelines;
the outlet ends of the condenser A (8) and the evaporative condenser B (9) are connected with the gas-liquid separator (6) through pipelines;
the top end of the gas-liquid separator (6) is connected with the top end of the evaporative condenser A (4) through a pipeline, the bottom end of the gas-liquid separator (6) is connected with the high-boiling-point refrigerant liquid accumulator (5) through a pipeline, and the high-boiling-point refrigerant liquid accumulator (5) is connected with the bottom end of the evaporative condenser A (4) through a pipeline;
the bottom end of the evaporative condenser A (4) is sequentially connected with the low-boiling-point refrigerant liquid reservoir (3), the heat regenerator (2) and the evaporator A (1), and the top end of the evaporative condenser A (4) is connected with the evaporator B (7).
2. The nested double-cascade combined cooling and heating system as claimed in claim 1, wherein: an expansion valve A (16) is arranged in a pipeline connecting the high-boiling-point refrigerant liquid storage device (5) and the evaporative condenser A (4); an expansion valve B (17) is arranged in a pipeline connecting the heat regenerator (2) and the evaporator A (1); the outlet end of the condenser B (10) is connected with the evaporative condenser B (9) through a pipeline, and an expansion valve C (18) is arranged in the pipeline.
3. The nested double-cascade combined cooling and heating system as claimed in claim 1, wherein: a stop valve A (13) is arranged in a pipeline connecting the compressor B (12) and the condenser A (8); a stop valve B (14) is arranged in a pipeline connecting the evaporative condenser A (4) and the evaporator B (7); the evaporative condenser A (4) is connected with the compressor B (12) through a pipeline, and a stop valve C (15) is arranged in the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011528863.8A CN112665205A (en) | 2020-12-22 | 2020-12-22 | Nested double-overlapping cold-hot combined supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011528863.8A CN112665205A (en) | 2020-12-22 | 2020-12-22 | Nested double-overlapping cold-hot combined supply system |
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| CN112665205A true CN112665205A (en) | 2021-04-16 |
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| CN202011528863.8A Pending CN112665205A (en) | 2020-12-22 | 2020-12-22 | Nested double-overlapping cold-hot combined supply system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526279A (en) * | 2009-03-31 | 2009-09-09 | 西安交通大学 | Cold recovery double-mode overlapping low-temperature refrigerator |
| US20120117996A1 (en) * | 2010-11-17 | 2012-05-17 | Hill Phoenix, Inc. | Cascade refrigeration system with modular ammonia chiller units |
| CN203274344U (en) * | 2013-03-26 | 2013-11-06 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving cascade refrigerating system |
| CN106642808A (en) * | 2016-12-23 | 2017-05-10 | 燕园德普科技（北京）有限公司 | Heating heat pump system used in ultralow-temperature environment |
| CN211476368U (en) * | 2019-12-30 | 2020-09-11 | 苏州苏净布什冷冻设备有限公司 | Low-ring-temperature self-overlapping type heat supply heat pump |
-
2020
- 2020-12-22 CN CN202011528863.8A patent/CN112665205A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526279A (en) * | 2009-03-31 | 2009-09-09 | 西安交通大学 | Cold recovery double-mode overlapping low-temperature refrigerator |
| US20120117996A1 (en) * | 2010-11-17 | 2012-05-17 | Hill Phoenix, Inc. | Cascade refrigeration system with modular ammonia chiller units |
| CN203274344U (en) * | 2013-03-26 | 2013-11-06 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving cascade refrigerating system |
| CN106642808A (en) * | 2016-12-23 | 2017-05-10 | 燕园德普科技（北京）有限公司 | Heating heat pump system used in ultralow-temperature environment |
| CN211476368U (en) * | 2019-12-30 | 2020-09-11 | 苏州苏净布什冷冻设备有限公司 | Low-ring-temperature self-overlapping type heat supply heat pump |
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Application publication date: 20210416 |
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