CN112880227B - Cold and heat source supply system for whole year in special technological environment of hospital and operation method thereof - Google Patents
Cold and heat source supply system for whole year in special technological environment of hospital and operation method thereof Download PDFInfo
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- CN112880227B CN112880227B CN202110096118.9A CN202110096118A CN112880227B CN 112880227 B CN112880227 B CN 112880227B CN 202110096118 A CN202110096118 A CN 202110096118A CN 112880227 B CN112880227 B CN 112880227B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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Abstract
The invention discloses a year-round cold and heat source supply system for a special technological environment of a hospital and an operation method thereof, wherein the year-round cold and heat source supply system comprises a cold water side heat exchanger and at least one pump assembly; the cold water side heat exchanger is provided with two cold water interfaces connected with a cold water pipeline of the air conditioner and at least one medium port group arranged corresponding to the pump assembly, and the medium port group comprises a first medium port and a second medium port; the pump assembly comprises a hot water side heat exchanger, a four-way valve, a compressor, a liquid storage tank, an auxiliary heat exchanger, a first throttling device, a second throttling device and a domestic hot water heat exchanger; the hot water side heat exchanger is provided with a first heat exchange medium port, a second heat exchange medium port and two hot water interfaces connected with an air conditioner hot water pipeline; two medium flowing ports of the domestic hot water heat exchanger are connected with an air-conditioning hot water pipeline. The water supply system for the domestic hot water in the hospital is heated by utilizing the redundant heating capacity of the four-pipe heating pump unit except for meeting the heating heat load requirement of the air conditioning system in the special technical place of the hospital, so that the load of the hot water boiler is greatly reduced, and the energy-saving effect is achieved.
Description
Technical Field
The invention relates to a cold and heat source supply system for a hospital in a special technological environment all year round and an operation method thereof.
Background
The requirement of comfortable air conditioning is required in general wards and office places of hospitals, and the requirement is generally solved by the following modes:
1. in summer, the hospital generally has a refrigeration machine room in the design of basement, adopts cooling water set to provide the required refrigerated water of the cooling of the air conditioning system of whole institute, and the refrigerated principle of this refrigerating unit is exactly through the reverse acting of unit compressor, takes out the heat of refrigerated water, and the natural evaporation of the cooling tower circulating water system that sets up through the roof is to outdoor heat dissipation, makes the refrigerated water temperature reduce, and this needs a large amount of water resources of consumption on the one hand, also is to the heat extraction of a large amount of atmospheric environment simultaneously. Therefore, the water chilling unit, the cooling tower and the matched water pump system are combined, and the comprehensive energy efficiency ratio SCOP value of the system can reach about 4.0.
2. In winter, an air conditioning system needs a heat supply source, a water chilling unit cannot provide heat, the problem is generally solved by additionally designing a set of hot water boiler system to produce hot water, the hot water supply temperature required by the air conditioning system for heating is 45 ℃, and the return water temperature is 40 ℃; the energy efficiency ratio COP value of this process is about 0.8.
3. Meanwhile, the domestic hot water is required in the ward of the hospital all the year round, the general design is also provided by water produced by a hot water boiler, and the water temperature of the hot water is generally required to be above 60 ℃ for preventing the legionella pollution.
The special technological places of the hospital refer to places with annual constant temperature and humidity requirements and annual refrigeration requirements on the working environment in the hospital, and with the continuous development of hospital construction, the special technological places of the hospital are more and more at present and specifically have the following areas: 1. a central supply chamber; 2. a vein placement center; 3. biological laboratories of clinical laboratories; 4. an operation section; 5. an ICU intensive care unit; 6. NICU neonatal ward; 7. a delivery room; 8. BICU burn department intensive care unit; CCU intensive care unit of cardiology; 9. purifying the blood ward; 10. animal laboratories; 11. nuclear medicine examination rooms, and the like.
Air conditioning systems in the places have the requirement of simultaneously supplying cold and heat all the year round, but the quantity of the simultaneously supplied cold and heat is different due to different seasons; but the general features are: except in winter, the demand of cold source supply is far greater than that of heat source supply, so the selection of cold and heat source equipment is entirely selected according to the refrigeration demand in summer. The current design is generally solved by the following methods:
1. in summer, a central air-conditioning refrigerator of the building is adopted to provide a cold source, and the cold source generally starts from the middle of 5 months to the end of 10 months every year; in winter, a building hot water boiler is adopted to provide a heat source, and the beginning of the middle 11 months of each year is finished to the end of the 3 months of the next year; in the middle months, because the refrigerating unit is stopped, in order to solve the refrigeration requirement of the technical air conditioner in special occasions, the heat pump unit is required to be separately configured for the occasions to provide a cold source.
2. Cold and heat sources are all provided by two-pipe heating pump units all year round, and the units can provide cold sources or heat sources, so that the simultaneous cooling and heating cannot be realized; the air conditioning system in a special technical place has dehumidification requirements in summer working conditions, dehumidification adopts a cooling and dehumidifying mode, cooling utilizes a cold source provided by a heat pump unit in two management systems, heating of the dehumidified air can be completed only by electric heating or hot water provided by a hot water boiler, the energy efficiency ratio of the heating process is low, and the COP value is not more than 0.8 at most.
Based on this, the cold and heat sources of special technological places are gradually and intensively provided by four-pipe air-cooled heat pump units in the whole year in the construction design of new hospitals in China and south China at present, and are separated from the refrigerating units of buildings; not only improves the comfort level of each special technical place of the hospital, but also greatly saves the operating cost. However, the four-tube air-cooled heat pump unit in the prior art has the following disadvantages:
1. the heating capacity of a general four-pipe heating pump unit is greater than the refrigerating capacity, and the power of a compressor is generally increased; the cold demand load of the air conditioning system in the special technical place of the hospital is far greater than the heat demand load (except the environment after the lowest outdoor temperature is lower than 0 ℃ in winter), and the general situation reaches about 2-3 times. In the special places like the nuclear medicine examination room, the heat dissipation of indoor equipment is large, so that the whole year refrigeration is needed, and in other places, the heating capacity of the system is larger than the refrigeration capacity generally only when the lowest outdoor temperature is lower than 0 ℃.
2. Therefore, a problem is caused, the heat which is recovered by the four-pipe heating pump unit cannot be used by the air conditioning system, and the heat has to be discharged to the atmosphere through the unit balance heat exchanger in order to ensure the cold and heat balance, so that the energy is greatly wasted.
3. Meanwhile, hospitals are places with large heat demands, domestic hot water is needed in wards and offices and working places every day, and the domestic hot water is generally made by adopting a hot water boiler, namely, the hot water is made at the expense.
As can be seen from the above description, in a hospital as well, on one hand, the recovered heat is not used for discharging, and on the other hand, hot water is prepared by a hot water boiler with poor energy efficiency ratio (about 3 times difference) to meet application requirements; how to combine the two, namely, huge economic efficiency and social benefit can be generated immediately; this is in fact the current situation in hospitals where four-tube heat pump units have been used.
4. The hot water generated by the four-pipe heat pump unit is below 60 ℃, the temperature difference of 3 ℃ is required for heating the domestic hot water by the plate exchange system, and the actually generated hot water cannot directly meet the requirement of the domestic hot water above 65 ℃, so that the hot water can not directly replace a hot water boiler in the current application, but can only be used as intermediate equipment for providing heating for a water supply system of the hot water boiler, and the hot water heating temperature difference of the hot water boiler can be reduced by about 25-30 ℃.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a cold and heat source supply system for a special technological environment of a hospital all year round, which utilizes redundant heating capacity of a four-pipe heating pump unit outside the requirement of meeting the heating heat load of an air conditioning system in a special technological place of the hospital to heat a water supply system for domestic hot water in the hospital, greatly reduces the load of a hot water boiler, achieves the effect of energy saving, simultaneously reduces the heat emission of the hospital to the atmospheric environment and realizes huge social benefits.
In order to solve the technical problems, the technical scheme of the invention is as follows: a cold and heat source supply system for a hospital in a special process environment all year round comprises a cold water side heat exchanger and at least one pump assembly;
the cold water side heat exchanger is provided with two cold water interfaces connected with a cold water pipeline of the air conditioner and at least one medium port group arranged corresponding to the pump assembly, and the medium port group comprises a first medium port and a second medium port;
the pump assembly comprises a hot water side heat exchanger, a four-way valve, a compressor, a liquid storage tank, an auxiliary heat exchanger, a first throttling device, a second throttling device and a domestic hot water heat exchanger; wherein the content of the first and second substances,
the hot water side heat exchanger is provided with a first heat exchange medium port, a second heat exchange medium port and two hot water interfaces connected with an air conditioner hot water pipeline;
the two medium flow ports of the domestic hot water heat exchanger are connected with an air-conditioning hot water pipeline, and the domestic hot water heat exchanger is suitable for exchanging heat for domestic water to form domestic hot water which is supplied to the domestic hot water pipeline;
the four-way valve comprises four connecting ports which are respectively a first connecting port, a second connecting port, a third connecting port and a fourth connecting port, and the four-way valve is suitable for being actuated to at least have a simultaneous heat and cold supply state, an independent cold supply state and an independent heat supply state; when the four-way valve is actuated to a state of simultaneously supplying heat and cold, the second connecting port is communicated with the fourth connecting port, and the other connecting ports are not communicated; when the four-way valve is actuated to an independent cooling state, the second connecting port is communicated with the first connecting port, and the other connecting ports are not communicated; when the four-way valve is actuated to an independent heat supply state, the second connecting port is communicated with the fourth connecting port, the first connecting port is communicated with the third connecting port, and the other connecting ports are not communicated;
the compressor has a compressed gas outlet and a gas inlet;
the liquid storage tank is provided with a liquid inlet and a liquid outlet;
the auxiliary heat exchanger is provided with a first auxiliary medium port and a second auxiliary medium port;
the first auxiliary medium port is communicated with the second heat exchange medium port, and the second auxiliary medium port is communicated with the first connecting port;
the compressed gas outlet is communicated with the second connecting port, and the gas inlet is respectively communicated with the third connecting port and the second medium port;
the liquid inlet is communicated with a pipeline between the first auxiliary medium port and the second heat exchange medium port, and the liquid outlet is connected with the first medium port after being connected with the second throttling device;
one end of the first throttling device is communicated with a pipeline between the first auxiliary medium port and the second heat exchange medium port, and the other end of the first throttling device is communicated with a pipeline between the liquid outlet and the second throttling device;
the first throttling device is suitable for being closed in a simultaneous heating and cooling state and an independent cooling state and working in an independent heating state;
the second throttling means is adapted to being operated in a simultaneous heating and cooling state and an individual cooling state and to being closed in an individual heating state.
Further, the auxiliary heat exchanger is an air-cooled heat exchanger.
Further, the first throttling device and/or the second throttling device is an electronic expansion valve.
Further, the pump assembly is provided with two.
Further, the cold and heat source supply system for the special process environment of the hospital all year round further comprises a cold and heat detecting device, and the cold and heat detecting device comprises:
the cold water flow detector is arranged on each cold water branch main pipe corresponding to each place in the cold water pipeline of the air conditioner and is used for collecting cold water flow;
the hot water flow detector is arranged on each hot water branch main pipe corresponding to each place in the air conditioner hot water pipeline and is used for collecting the hot water flow;
and the service controller is respectively connected with the cold water flow detector and the hot water flow detector so as to receive the cold water flow collected by the cold water flow detector and/or the hot water flow collected by the hot water flow detector.
Further, the cold and heat detecting device further comprises a display module connected with the service controller, wherein the display module is suitable for displaying relevant information transmitted by the service controller, and the relevant information comprises cold water flow and/or hot water flow.
Further, the system also comprises a user terminal connected with the service controller, wherein the user terminal is suitable for displaying relevant information transmitted by the service controller, and the relevant information comprises cold water flow and/or hot water flow.
The invention also provides an operation method of the annual cold and heat source supply system in the special process environment of the hospital, which comprises three operation modes:
when in simultaneous heating and cooling mode: the gas compressed by the compressor enters the hot water side heat exchanger through the four-way valve to be condensed and released, the gas exchanges heat with a backflow medium in the air-conditioning hot water pipeline to form a heat source for the air-conditioning hot water pipeline, liquid formed by gas condensation passes through the liquid storage tank, then passes through the second throttling device to be throttled and depressurized, enters the cold water side heat exchanger to evaporate and absorb heat to cool the backflow medium in the air-conditioning cold water pipeline to form a cold source for the air-conditioning cold water pipeline, and the gas after heat exchange enters the compressor to be compressed; wherein, at least part of the heat source is suitable for exchanging heat with return water in the domestic hot water pipeline in the domestic hot water heat exchanger to form domestic hot water to be supplied to the domestic hot water pipeline;
when in the cooling only mode: the gas compressed by the compressor enters the auxiliary heat exchanger through the four-way valve to be condensed and released heat, the liquid formed after condensation passes through the liquid storage tank, is throttled and depressurized through the second throttling device, then enters the cold water side heat exchanger to be evaporated and absorb heat to cool a reflux medium in the cold water pipeline of the air conditioner so as to form a cold source supplied to the cold water pipeline of the air conditioner, and the gas after heat exchange enters the compressor to be compressed;
in an independent heat supply mode, gas compressed by the compressor enters the hot water side heat exchanger through the four-way valve to be condensed and released heat, the gas exchanges heat with a reflux medium in the air-conditioning hot water pipeline to form a heat source for the air-conditioning hot water pipeline, liquid formed after the gas condensation passes through the liquid storage tank, then enters the auxiliary heat exchanger to be evaporated and absorb heat after being throttled and depressurized by the first throttling device, and the gas after heat exchange enters the compressor through the four-way valve to be compressed; wherein, at least part of the heat source is suitable for exchanging heat with return water in the domestic hot water pipeline in the domestic hot water heat exchanger to form domestic hot water to be supplied to the domestic hot water pipeline.
After the technical scheme is adopted, the invention has the following beneficial effects:
1. the air conditioning equipment at the tail end of the special technological place of the hospital is designed according to four pipes, cold and heat sources all year round are provided by the cold and heat source supply system of the special technological environment of the hospital all year round, and the cold and heat source supply system of the special technological environment of the hospital all year round can provide three operation modes: the single cold, single heat and cold and heat can be simultaneously operated, and the provided cold and heat can be adjusted by 12.5-100 percent, so the cold and heat supply device is very suitable for being used as a supply device of a cold and heat source in a special technological place of a hospital all the year round;
2. the hot water of the annual cold and heat source supply system in the special process environment of the hospital can be used for heating a domestic hot water supply system in a domestic hot water heat exchanger;
3. a cold water quantity detector and a hot water quantity detector are respectively added to each cold water branch main pipe and each hot water branch main pipe of each technical place to detect the instant cold and heat quantity requirement of each place, a special technical place cold and heat load requirement monitoring screen (namely a display module and a service controller) is established in a hospital control room, and the acquired data is displayed for a hospital manager to watch.
4. And the observation function of the user terminal (such as a mobile phone and a tablet) can be realized in an internet and cloud service mode.
Drawings
FIG. 1 is a schematic connection diagram of a year-round cold and heat source supply system for a special process environment of a hospital according to the present invention;
FIG. 2 is a schematic view of a mode of simultaneous heating and cooling of a cold and heat source supply system of a hospital special process environment of the present invention throughout the year;
FIG. 3 is a schematic view of an independent cooling mode of a year round cold and heat source supply system in a special process environment of a hospital according to the present invention;
FIG. 4 is a schematic view of an individual heating mode of a cold and heat source supply system of a hospital in a special process environment of the invention all year round;
fig. 5 is a schematic block diagram of a cold and heat detecting device according to the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 to 5, a year round cold and heat source supply system for a special process environment of a hospital comprises a cold water side heat exchanger 1 and at least one pump assembly;
the cold water side heat exchanger 1 is provided with two cold water interfaces 13 connected with a cold water pipeline of an air conditioner and at least one medium port group arranged corresponding to the pump assembly, and the medium port group comprises a first medium port 11 and a second medium port 12; one of the cold water interfaces 13 is connected with return water in the cold water pipeline of the air conditioner; the other cold water interface 13 outputs a cold source required by air conditioning refrigeration;
the pump assembly comprises a hot water side heat exchanger 2, a four-way valve 3, a compressor 4, a liquid storage tank 5, an auxiliary heat exchanger 6, a first throttling device 7, a second throttling device 8 and a domestic hot water heat exchanger; wherein the content of the first and second substances,
the hot water side heat exchanger 2 is provided with a first heat exchange medium port 21, a second heat exchange medium port 22 and two hot water interfaces 23 connected with an air-conditioning hot water pipeline; one of the hot water interfaces 23 is connected with return water of a hot water pipeline of the air conditioner, and the other hot water interface 23 outputs a heat source for air conditioning heat or a heat source for domestic hot water heat exchange;
two medium flow ports of the domestic hot water heat exchanger are connected with an air-conditioning hot water pipeline, and the domestic hot water heat exchanger is suitable for exchanging heat for domestic water to form domestic hot water which is supplied to the domestic hot water pipeline;
the four-way valve 3 includes four connection ports, which are a first connection port 31, a second connection port 32, a third connection port 33, and a fourth connection port 34, respectively, and the four-way valve 3 is adapted to be actuated to have at least a simultaneous heat and cold supplying state, an individual cold supplying state, and an individual heat supplying state; when the four-way valve 3 is actuated to a state of supplying heat and cooling at the same time, the second connection port 32 and the fourth connection port 34 are communicated, and the other connection ports are not communicated; when the four-way valve 3 is actuated to the independent cooling state, the second connection port 32 is communicated with the first connection port 31, and the other connection ports are not communicated; when the four-way valve 3 is actuated to the single heating state, the second connection port 32 and the fourth connection port 34 are communicated, the first connection port 31 and the third connection port 33 are communicated, and the remaining connection ports are not communicated;
the compressor 4 has a compressed gas outlet 41 and a gas inlet 42;
the reservoir 5 has a fluid inlet 51 and a fluid outlet 52;
the auxiliary heat exchanger 6 has a first auxiliary medium port 61 and a second auxiliary medium port 62;
the first auxiliary medium port 61 is communicated with the second heat exchange medium port 22, and the second auxiliary medium port 62 is communicated with the first connection port 31;
the compressed gas outlet 41 is communicated with the second connecting port 32, and the gas inlet 42 is respectively communicated with the third connecting port 33 and the second medium port 12;
the liquid inlet 51 is communicated with a pipeline between the first auxiliary medium port 61 and the second heat exchange medium port 22, and the liquid outlet 52 is connected with the first medium port 11 after being connected with the second throttling device 8;
one end of the first throttling device 7 is communicated with a pipeline between the first auxiliary medium port 61 and the second heat exchange medium port 22, and the other end of the first throttling device 7 is communicated with a pipeline between the liquid outlet 52 and the second throttling device 8;
the first throttling means 7 are adapted to be closed in the simultaneous cooling and heating states and in the separate cooling and heating states;
the second throttle means 8 is adapted to be operated in a simultaneous heating and cooling state and in an individual cooling state and to be closed in an individual heating state.
Specifically, as shown in fig. 1 to 4, the auxiliary heat exchanger 6 may be an air-cooled heat exchanger.
As shown in fig. 1 to 4, the first throttle device 7 and the second throttle device 8 may be electronic expansion valves, or may be throttle capillary tubes.
As shown in fig. 1 to 4, two pump assemblies are provided, and the other pump assembly can complement the gap of heat under the condition of insufficient heat source.
As shown in fig. 5, the annual cold and heat source supply system in the special process environment of the hospital further comprises a cold and heat detecting device, and the cold and heat detecting device comprises:
a cold water flow detector 91 disposed on each cold water branch header pipe corresponding to each place in the cold water pipeline of the air conditioner and used for collecting cold water flow;
a hot water flow detector 92 provided on each hot water branch main pipe corresponding to each place in the air conditioner hot water pipeline and used for collecting hot water flow;
the service controller 93 and the service controller 93 are respectively connected with the cold water flow detector 91 and the hot water flow detector 92 to receive the cold water flow collected by the cold water flow detector 91 and/or the hot water flow collected by the hot water flow detector 92.
The cold and heat detecting device further includes a display module 94 connected to the service controller 93, and the display module 94 is adapted to display the related information transmitted by the service controller 93, wherein the related information includes cold water flow and hot water flow.
Also included is a user terminal connected to the service controller 93, the user terminal being adapted to display relevant information transmitted by the service controller 93, the relevant information including cold water flow and hot water flow. In this embodiment, the user terminal may be a mobile phone or a tablet.
The operation method of the annual cold and heat source supply system in the special process environment of the hospital comprises three operation modes:
when in simultaneous heating and cooling mode: the gas compressed by the compressor 4 enters the hot water side heat exchanger 2 through the four-way valve 3 to be condensed and released heat, the gas exchanges heat with a reflux medium in a hot water pipeline of the air conditioner to form a heat source for the hot water pipeline of the air conditioner, the liquid formed by the condensation of the gas passes through the liquid storage tank 5, then is throttled and depressurized by the second throttling device 8, enters the cold water side heat exchanger 1 to evaporate and absorb heat to cool the reflux medium in a cold water pipeline of the air conditioner to form a cold source for the cold water pipeline of the air conditioner, and the gas after heat exchange enters the compressor 4 to be compressed; wherein, at least part of the heat source is suitable for exchanging heat with return water in the domestic hot water pipeline in the domestic hot water heat exchanger to form domestic hot water to be supplied to the domestic hot water pipeline;
when in the cooling only mode: the gas compressed by the compressor 4 enters the auxiliary heat exchanger 6 through the four-way valve 3 to be condensed and released heat, the liquid formed after condensation passes through the liquid storage tank 5, is throttled and depressurized through the second throttling device 8, then enters the cold water side heat exchanger 1 to be evaporated and absorbed to cool the reflux medium in the cold water pipeline of the air conditioner so as to form a cold source supplied to the cold water pipeline of the air conditioner, and the gas after heat exchange enters the compressor to be compressed;
in an independent heat supply mode, gas compressed by a compressor 4 enters a hot water side heat exchanger 2 through a four-way valve 3 to be condensed and released heat, the gas exchanges heat with a return medium in an air-conditioning hot water pipeline to form a heat source for the air-conditioning hot water pipeline, liquid formed after the gas condensation passes through a liquid storage tank 5, then is throttled and depressurized through a first throttling device 7 and then enters an auxiliary heat exchanger 6 to be evaporated and absorbed heat, and the gas after heat exchange enters the compressor 4 through the four-way valve 3 to be compressed; wherein, at least part of the heat source is suitable for exchanging heat with return water in the domestic hot water pipeline in the domestic hot water heat exchanger to form domestic hot water to be supplied to the domestic hot water pipeline.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, 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 present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (8)
1. A cold and heat source supply system for a hospital in a special process environment all year round is characterized by comprising a cold water side heat exchanger (1) and at least one pump assembly;
the cold water side heat exchanger (1) is provided with two cold water interfaces (13) connected with a cold water pipeline of an air conditioner and at least one medium port group arranged corresponding to the pump assembly, and the medium port group comprises a first medium port (11) and a second medium port (12);
the pump assembly comprises a hot water side heat exchanger (2), a four-way valve (3), a compressor (4), a liquid storage tank (5), an auxiliary heat exchanger (6), a first throttling device (7), a second throttling device (8) and a domestic hot water heat exchanger; wherein the content of the first and second substances,
the hot water side heat exchanger (2) is provided with a first heat exchange medium port (21), a second heat exchange medium port (22) and two hot water interfaces (23) connected with an air conditioner hot water pipeline;
the two medium flow ports of the domestic hot water heat exchanger are connected with an air-conditioning hot water pipeline, and the domestic hot water heat exchanger is suitable for exchanging heat for domestic water to form domestic hot water which is supplied to the domestic hot water pipeline;
the four-way valve (3) comprises four connecting ports which are respectively a first connecting port (31), a second connecting port (32), a third connecting port (33) and a fourth connecting port (34), and the four-way valve (3) is suitable for being actuated to at least have a simultaneous heat and cold supply state, an independent cold supply state and an independent heat supply state; when the four-way valve (3) is actuated to a state of supplying heat and cooling at the same time, the second connecting port (32) is communicated with the fourth connecting port (34), and the other connecting ports are not communicated; when the four-way valve (3) is actuated to a single cold supply state, the second connecting port (32) is communicated with the first connecting port (31), and the other connecting ports are not communicated; when the four-way valve (3) is actuated to an independent heating state, the second connecting port (32) is communicated with the fourth connecting port (34), the first connecting port (31) is communicated with the third connecting port (33), and the rest connecting ports are not communicated;
the compressor (4) having a compressed gas outlet (41) and a gas inlet (42);
the liquid storage tank (5) is provided with a liquid inlet (51) and a liquid outlet (52);
the auxiliary heat exchanger (6) has a first auxiliary medium port (61) and a second auxiliary medium port (62);
the first auxiliary medium port (61) is communicated with the second heat exchange medium port (22), and the second auxiliary medium port (62) is communicated with the first connecting port (31);
the compressed gas outlet (41) is communicated with the second connecting port (32), and the gas inlet (42) is respectively communicated with the third connecting port (33) and the second medium port (12);
the liquid inlet (51) is communicated with a pipeline between the first auxiliary medium port (61) and the second heat exchange medium port (22), and the liquid outlet (52) is connected with the first medium port (11) after being connected with the second throttling device (8);
one end of the first throttling device (7) is communicated with a pipeline between the first auxiliary medium port (61) and the second heat exchange medium port (22), and the other end of the first throttling device (7) is communicated with a pipeline between the liquid outlet (52) and the second throttling device (8);
the first throttling means (7) are adapted to be closed in a simultaneous heating and cooling state and in an individual cooling state and to operate in an individual heating state;
the second throttling means (8) are adapted to operate in a simultaneous heating and cooling state and in an individual cooling state and to be closed in an individual heating state;
a fourth connection port (34) of the four-way valve (3) is communicated with a first heat exchange medium port (21) of the hot water side heat exchanger (2).
2. The system for supplying cold and heat sources of hospital special process environment year round according to claim 1,
the auxiliary heat exchanger (6) is an air-cooled heat exchanger.
3. The system for supplying cold and heat sources of hospital special process environment year round according to claim 1,
the first throttle device (7) and/or the second throttle device (8) is/are electronic expansion valves.
4. The system for supplying cold and heat sources of hospital special process environment year round according to claim 1,
the pump machine component is provided with two.
5. The system for supplying cold and heat sources of hospital special process environment year round according to claim 1,
still include cold and heat volume detection device, cold and heat volume detection device includes:
a cold water flow detector (91) which is arranged on each cold water branch main pipe corresponding to each place in the cold water pipeline of the air conditioner and is used for collecting cold water flow;
a hot water flow detector (92) which is arranged on each hot water branch main pipe corresponding to each place in the air conditioner hot water pipeline and is used for collecting the hot water flow;
the service controller (93), the service controller (93) is respectively connected with the cold water flow detector (91) and the hot water flow detector (92) to receive the cold water flow collected by the cold water flow detector (91) and/or the hot water flow collected by the hot water flow detector (92).
6. The system for supplying cold and heat sources of hospital special process environment year round according to claim 5,
the cold and heat detection device further comprises a display module (94) connected with the service controller (93), wherein the display module (94) is suitable for displaying relevant information transmitted by the service controller (93), and the relevant information comprises cold water flow and/or hot water flow.
7. The system for supplying cold and heat sources of hospital special process environment year round according to claim 6,
the system also comprises a user terminal connected with the service controller (93), wherein the user terminal is suitable for displaying relevant information transmitted by the service controller (93), and the relevant information comprises cold water flow and/or hot water flow.
8. An operation method of the year round cold and heat source supply system for the special technological environment of the hospital as claimed in any one of claims 1 to 7, characterized in that the operation method comprises three operation modes:
when in simultaneous heating and cooling mode: gas compressed by the compressor (4) enters the hot water side heat exchanger (2) through the four-way valve (3) to be condensed and released heat, the gas exchanges heat with a reflux medium in the air-conditioning hot water pipeline to form a heat source for the air-conditioning hot water pipeline, liquid formed by gas condensation passes through the liquid storage tank (5), then is throttled and depressurized through the second throttling device (8), enters the cold water side heat exchanger (1) to evaporate and absorb heat to cool the reflux medium in the air-conditioning cold water pipeline to form a cold source for the air-conditioning cold water pipeline, and the gas after heat exchange enters the compressor (4) to be compressed; wherein, at least part of the heat source is suitable for exchanging heat with return water in the domestic hot water pipeline in the domestic hot water heat exchanger to form domestic hot water to be supplied to the domestic hot water pipeline;
when in the cooling only mode: gas compressed by the compressor (4) enters the auxiliary heat exchanger (6) through the four-way valve (3) to be condensed and released heat, liquid formed after condensation passes through the liquid storage tank (5), then is throttled and depressurized through the second throttling device (8), enters the cold water side heat exchanger (1) to be evaporated and absorbed heat to cool a backflow medium in the cold water pipeline of the air conditioner to form a cold source supplied to the cold water pipeline of the air conditioner, and the gas after heat exchange enters the compressor to be compressed;
in an independent heat supply mode, gas compressed by the compressor (4) enters the hot water side heat exchanger (2) through the four-way valve (3) to be condensed and released heat, the gas exchanges heat with a reflux medium in the air-conditioning hot water pipeline to form a heat source for the air-conditioning hot water pipeline, liquid formed after the gas condensation passes through the liquid storage tank (5), then is throttled and depressurized through the first throttling device (7), then enters the auxiliary heat exchanger (6) to be evaporated and absorbed heat, and the gas after heat exchange enters the compressor (4) through the four-way valve (3) to be compressed; wherein, at least part of the heat source is suitable for exchanging heat with return water in the domestic hot water pipeline in the domestic hot water heat exchanger to form domestic hot water to be supplied to the domestic hot water pipeline.
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| CN202110096118.9A CN112880227B (en) | 2021-01-25 | 2021-01-25 | Cold and heat source supply system for whole year in special technological environment of hospital and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110096118.9A CN112880227B (en) | 2021-01-25 | 2021-01-25 | Cold and heat source supply system for whole year in special technological environment of hospital and operation method thereof |
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| CN112880227B true CN112880227B (en) | 2021-11-30 |
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| CN114413357B (en) * | 2021-12-22 | 2023-05-16 | 珠海格力电器股份有限公司 | Parameter determining method and related equipment for four-pipe system for air conditioner |
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| CN107560230A (en) * | 2017-08-07 | 2018-01-09 | 珠海格力电器股份有限公司 | Heat pump, Analysis of Heat Pump Drying System and its control method |
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| KR20100110967A (en) * | 2009-04-06 | 2010-10-14 | 이진선 | Self cooling circle heat pump |
| EP3001123A1 (en) * | 2013-08-02 | 2016-03-30 | O.Y.L. Research & Development Centre Sdn Bhd | Heat reclaim for a multifunction heat pump and a muntifunction air conditioner |
| CN107388625A (en) * | 2017-08-07 | 2017-11-24 | 珠海格力电器股份有限公司 | Heat pump, Analysis of Heat Pump Drying System and its control method |
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