CN210441383U - External ice melting cold accumulation refrigerating system - Google Patents
External ice melting cold accumulation refrigerating system Download PDFInfo
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- CN210441383U CN210441383U CN201921363572.0U CN201921363572U CN210441383U CN 210441383 U CN210441383 U CN 210441383U CN 201921363572 U CN201921363572 U CN 201921363572U CN 210441383 U CN210441383 U CN 210441383U
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Abstract
The utility model provides an external ice melting cold accumulation refrigeration system, which comprises a dual-working-condition refrigeration host machine, an ice accumulation groove, a heat exchanger, a cooling circulation device, a water return pipeline and a water supply pipeline; the dual-working-condition refrigeration main machine comprises a first evaporator and a first condenser; liquid flowing out of the first evaporator flows through the heat exchanger through the first pipeline and then flows back to the first evaporator, and flows through the ice storage tank through the second pipeline and then flows back to the first evaporator; liquid flowing out of the water return pipeline flows through the heat exchanger through a third pipeline and then flows into an ice storage tank, and the ice storage tank is communicated with a water supply pipeline; two ends of the first pipeline are respectively provided with a first valve, and two ends of the second pipeline are respectively provided with a second valve; the heat exchanger is used for exchanging heat between the liquid in the first pipeline and the liquid in the third pipeline; the cooling circulation device is connected with the first condenser and used for cooling and circulating the liquid in the first condenser. The utility model discloses an outer ice-melt cold-storage refrigerating system has solved and has adopted the high problem of double evaporator host computer cost investment among the outer ice-melt cold-storage system among the prior art.
Description
Technical Field
The utility model belongs to the technical field of the refrigeration, a outer ice-melt cold-storage refrigerating system is related to.
Background
Due to the industrial development and the improvement of the living standard of people's material culture, the popularization rate of the air conditioner is increased year by year, the power consumption is increased rapidly, the peak power is short, and the off-peak power cannot be fully applied. Therefore, how to shift peak power demand, "shift peak and fill valley", balance power supply, and improve effective utilization of electric energy becomes a problem that many countries pay attention to solve at present. The adoption of "time of use price" policies, as well as certain motivational policies, further drives the aggressiveness of using valley power. Therefore, the low valley cold accumulation technology is valued and developed. Among them, the heat and cold storage technologies are widely used in air conditioning systems and are relatively mature technologies, and the cold storage air conditioner is an important part of the air conditioning system, and is more and more paid attention to by people.
The cold accumulation air-conditioning system utilizes the night off-peak electricity for refrigeration, stores cold energy in the form of ice, cold water or a solidified phase-change material, and partially or completely utilizes the stored cold energy to supply cold to the air-conditioning system during the peak load period of the air conditioner, so as to achieve the purposes of reducing the installation capacity of refrigeration equipment, reducing the operation cost and cutting the peak and filling the valley of the electric power load.
Among various cold accumulation air-conditioning systems, the external ice melting and cold accumulation system has the advantages of low water outlet temperature and high ice melting rate because ice is directly contacted with air-conditioning water for cold release.
The existing external ice-melting cold-storage system usually adopts a double-evaporator refrigeration host machine, the host machine is provided with two evaporators, and one evaporator is connected to a secondary refrigerant loop and is used for making ice at night; and the other is connected to the air-conditioning water loop for daytime air-conditioning cooling.
Because the double-evaporator refrigeration main machine is provided with two evaporator components, the machine set occupies a large space of a machine room; the unit belongs to an industrial machine type, needs nonstandard design, has the selling price more than one time higher than that of a common double-working-condition host, and even if the investment of a plate heat exchanger can be saved and the economic benefit brought by improving the energy efficiency of a system is considered, the initial investment is still much higher and the cost is higher.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an outer ice-melt cold-storage refrigerating system to adopt the high problem of double evaporator host computer cost investment among the outer ice-melt cold-storage refrigerating system among the solution prior art.
In order to solve the technical problem, the utility model provides an external ice melting cold accumulation refrigerating system, which comprises a double-working-condition refrigerating host machine, an ice accumulation groove, a heat exchanger, a cooling circulating device, a water return pipeline and a water supply pipeline; the dual-working-condition refrigeration main machine comprises a first evaporator and a first condenser; liquid flowing out of the outlet end of the first evaporator flows through the heat exchanger through a first pipeline and then flows back to the inlet end of the first evaporator; the liquid flowing out of the outlet end of the first evaporator flows through the ice storage tank through a second pipeline and then flows back to the inlet end of the first evaporator; liquid flowing out of the water return pipeline flows into the ice storage tank after flowing through the heat exchanger through a third pipeline, a water supply port is formed in the ice storage tank, and the water supply pipeline is communicated with the water supply port; two ends of the first pipeline are respectively provided with a first valve, and two ends of the second pipeline are respectively provided with a second valve; the heat exchanger is used for heat exchange between the liquid in the first pipeline and the liquid in the third pipeline; the cooling circulation device is connected with the first condenser and used for cooling circulation of liquid in the first condenser.
Further, when two first valves on the first pipeline are opened, two second valves on the second pipeline are closed, the dual-working-condition refrigeration host outputs a first working condition, the refrigeration mode is started, and the temperature of liquid flowing out of the outlet end of the evaporator is T1; when a second valve on the second pipeline is opened, two first valves on the first pipeline are closed, the dual-working-condition refrigeration host outputs a second working condition, an ice making mode is started, and the temperature of liquid flowing out of the outlet end of the evaporator is T2; wherein T1 > T2.
Further, the outlet end of the first evaporator is connected with one end of a first connecting pipe, and the other end of the first connecting pipe is respectively connected with one end of the first pipeline and one end of the second pipeline; the inlet end of the first evaporator is connected with one end of a second connecting pipe, and the other end of the second connecting pipe is respectively connected with the other end of the first pipeline and the other end of the second pipeline; a first circulating pump is arranged on the first connecting pipe and/or the second connecting pipe.
Furthermore, the external ice-melting cold-storage refrigeration system also comprises a closed constant-pressure device, the closed constant-pressure device is connected with the second connecting pipe, and the closed constant-pressure device is used for supplementing secondary refrigerants into the first connecting pipe and the second connecting pipe and maintaining the pressure of liquid in the external ice-melting cold-storage refrigeration system to achieve the purpose of system constant pressure.
Furthermore, the ice storage tank comprises an ice storage tank body and an ice storage coil pipe, wherein the ice storage tank body is provided with an inner cavity, and the ice storage coil pipe is arranged in the inner cavity; the second pipeline comprises a first branch pipe and a second branch pipe, two ends of the ice storage coil pipe are respectively connected with one ends of the first branch pipe and the second branch pipe, and the other end of the first branch pipe and the other end of the second branch pipe are respectively two ends of the second pipeline; liquid flowing out of the water return pipeline flows into the inner cavity of the ice storage tank after flowing through the heat exchanger through a third pipeline, the ice storage tank body is provided with a water supply port communicated with the inner cavity, and the water supply pipeline is communicated with the water supply port.
Furthermore, liquid flowing out of the water return pipeline flows into the upper part of the inner cavity of the ice storage tank after flowing through the heat exchanger through a third pipeline, and the water supply port is communicated with the lower part of the inner cavity.
Furthermore, the third pipeline comprises a third branch pipe and a fourth branch pipe, the water return pipeline is connected with one end of the third branch pipe, the third branch pipe flows through the heat exchanger, the other end of the third branch pipe is connected with one end of the fourth branch pipe, and liquid flowing out of the other end of the fourth branch pipe flows into the ice storage tank.
Further, a third valve is arranged at the other end of the fourth branch pipe close to the fourth branch pipe.
Furthermore, one end of the third branch pipe is connected with one end of the fourth branch pipe through a third connecting pipe.
Furthermore, the fourth branch pipe is connected with the water supply pipeline through a fourth connecting pipe.
Furthermore, a fourth valve is arranged on the fourth connecting pipe.
Furthermore, a fifth valve is arranged on the water supply pipeline close to the water supply port.
Furthermore, a second circulating pump is arranged on the third pipeline, and a third circulating pump is arranged on the water supply pipeline.
Further, the external ice-melting cold-storage refrigeration system also comprises a conventional refrigeration host machine, wherein the conventional refrigeration host machine comprises a second evaporator and a second condenser; the liquid flowing out of the water return pipeline flows into the inlet end of the second evaporator through a fourth pipeline; the liquid flowing out of the outlet end of the second evaporator finally flows into the water supply pipeline; the cooling circulation device is also connected with the second condenser and used for cooling circulation of liquid in the second condenser.
Further, the outlet end of the second evaporator is communicated with the part of the third pipeline after flowing through the heat exchanger.
The utility model provides an external ice melting cold accumulation refrigerating system, which adopts a mode that a double-working-condition refrigerating host machine is connected with an ice storage tank in series, the temperature difference of the supply return water is jointly borne by the refrigerating host machine and the ice storage tank, and the temperature difference of the supply return water can be increased; the mode of the upper stream of the dual-working-condition refrigeration main machine and the lower stream of the ice storage tank is adopted, the water supply temperature of the air-conditioning refrigeration system is close to zero, the low-temperature water supply of the air-conditioning water system can be realized, and conditions are created for realizing low-temperature air supply. Besides, the large temperature difference water supply and return can save the investment of pipes and water system fittings, and the water system conveying energy consumption saved in daily operation is also considerable due to the reduction of water flow.
Moreover, with the utility model discloses a low temperature air supply system that refrigerating system allies oneself with uses can the low temperature cold source advantage that full play ice storage provided. Specifically, the initial investment can be reduced: the reduction of the air volume of the air conditioning system is the most fundamental, direct and effective way for reducing the initial investment; more energy-saving: the capacity of conveying equipment of the air conditioning system is reduced, so that the energy consumption of the conveying equipment is obviously reduced; comfort: because the air supply temperature is reduced, the dehumidification capacity is stronger, and the relative humidity of the indoor air can be controlled to be 30-45%, so that the indoor thermal comfort is improved.
Further, the utility model discloses still parallelly connected with the dual mode refrigeration host computer through with conventional refrigeration host computer, satisfied multiple demand mode for refrigerating system's range of application is wider.
Drawings
Fig. 1 is a schematic diagram of an overall structure of an external ice-melting cold-storage refrigeration system provided in a first embodiment of the present invention;
fig. 2 is a schematic diagram of the overall structure of an external ice-melting cold-storage refrigeration system provided by the second embodiment of the present invention;
wherein, 1-double working condition refrigeration host machine; 2-an ice storage tank; 3-a heat exchanger; 4-a cooling circulation device; 5-a water return pipeline; 6-water supply pipeline; 11-a first evaporator; 12-a first condenser; 101-a first conduit; 102-a second conduit; 103-a third conduit; 104-a fourth conduit; 20-water supply port; 21-an ice storage tank body; 22-ice storage coil pipe; 71-a first valve; 72-a second valve; 73-a third valve; 74-a fourth valve; 75-a fifth valve; 801-first connection pipe; 802-second connecting tube; 803-third connecting tube; 804-a fourth connecting tube; 91-a first circulation pump; 92-a second circulation pump; 93-a third circulation pump; 1000-closed constant pressure device; 1021-a first leg; 1022-a second branch pipe; 1033-third leg; 1034-fourth branch pipe; 200-conventional refrigeration host; 201-a second evaporator; 202-second condenser.
Detailed Description
The external ice-melting cold-storage refrigeration system provided by the invention is further described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the claims and the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.
Example one
Fig. 1 is a schematic diagram of an overall structure of an external ice-melting cold-storage refrigeration system provided in an embodiment of the present invention. Referring to fig. 1, an external ice-melting cold-storage refrigeration system includes a dual-working-condition refrigeration host 1, an ice storage tank 2, a heat exchanger 3, a cooling circulation device 4, a water return pipe 5 and a water supply pipe 6; the dual-working-condition refrigeration main machine 1 comprises a first evaporator 11 and a first condenser 12; the liquid flowing out of the outlet end of the first evaporator 11 flows back to the inlet end of the first evaporator 11 after flowing through the heat exchanger 3 through a first pipeline 101; the liquid flowing out of the outlet end of the first evaporator 11 flows back to the inlet end of the first evaporator 11 after flowing through the ice storage tank 2 through a second pipeline 102; the liquid flowing out of the water return pipeline 5 flows through the heat exchanger 3 through a third pipeline 103 and then flows into the ice storage tank 2, a water supply port 20 is formed in the ice storage tank 2, and the water supply pipeline 6 is communicated with the water supply port 20; two ends of the first pipeline 101 are respectively provided with a first valve 71, and two ends of the second pipeline 102 are respectively provided with a second valve 72; the heat exchanger 3 is used for heat exchange between the liquid in the first pipeline 101 and the liquid in the third pipeline 103; the cooling circulation device 4 is connected to the first condenser 12, and is configured to perform cooling circulation on the liquid in the first condenser 12.
In the present embodiment, the dual-mode main unit 1 has two operating modes, the first is an ice-making mode, and the second is a cooling mode. During the night electricity-using valley, the external ice-melting cold-storage refrigeration system starts an ice-making mode, in the ice-making mode, the two first valves 71 are closed, the two second valves 72 are opened, at this time, the temperature T2 of the liquid flowing out from the outlet end of the evaporator 11 is low, the liquid with the lower temperature flows out from the outlet end of the evaporator 11, flows through the second pipeline 102, flows through the ice storage tank 2, and then flows back to the inlet end of the evaporator 11, when the second pipeline 102 flows through the ice storage tank 2, because the temperature of the liquid in the second pipeline 102 is low, part of water originally existing in the ice storage tank 2 can be frozen into ice, so that the cold energy is stored in the ice storage tank 2 in the form of ice, and the purpose of 'utilizing the night valley electricity for refrigeration, and storing the cold energy in the form of ice, cold water or a solidified phase-change material' is achieved. During the daytime electricity peak, the external ice-melting cold-storage refrigeration system starts a refrigeration mode, in the refrigeration mode, two first valves 71 are opened, and two second valves 72 are closed, at this time, the temperature T1 of the liquid flowing out of the outlet end of the evaporator 11 of the dual-working-condition main machine 1 is higher than that of T2, and the liquid flowing out of the outlet end of the evaporator 11 flows back to the evaporator 11 after flowing through the heat exchanger 3 through the first pipeline 101.
In the heat exchanger 3, the liquid, such as water, in the water return pipe 5 flows through the heat exchanger 3 through the third pipe 103 and then flows into the ice storage tank 2, the water in the water return pipe 5 is subjected to primary heat exchange and temperature reduction in the heat exchanger 3, the water subjected to primary heat exchange and temperature reduction continuously flows into the ice storage tank 2 to be subjected to secondary heat exchange and temperature reduction with the ice stored in the ice making mode, the temperature of the water subjected to secondary temperature reduction is lower, the water subjected to secondary temperature reduction flows into the water supply pipe 6 through the water supply port 20 to supply water to the refrigeration system, so that the purpose of using the cold stored in the ice making mode at night at off-peak electricity price is achieved, and by means of the operation mode, the dual-working condition main machine and the ice melting under the refrigeration mode can supply cold at peak time in daytime, and the cooling operation cost is greatly saved, the installed capacity of the refrigeration host and the installed capacity of the power distribution equipment are reduced, and peak shifting and valley filling are realized. Moreover, because the temperature of the ice/water stored in the ice making mode is very low, when the ice/water is cooled secondarily in the daytime cooling mode, the temperature of the water supplied to the water supply pipeline 6 can be reduced to be very low, for example, to be as low as about 1 ℃, so that the temperature difference between the water in the water return pipeline 5 and the water in the water supply pipeline 6 can reach about 11 ℃, water supply with large temperature difference is realized, the circulating water quantity and the conveying energy consumption of a refrigeration system can be greatly reduced, the operating cost of a user is saved, and good economic benefit and social benefit are achieved.
Wherein the heat exchanger 3 may be a plate heat exchanger. The cooling circulation device 4 may be a cooling tower, a cooling water pump, a cooling water pipe, or the like, and is connected to the inlet and outlet of the first condenser 12 through pipes, respectively, to realize cooling circulation of the liquid in the first condenser 12. Preferably, a circulation pump may be provided in a connection pipe between the cooling cycle device 4 and the first condenser 12 to realize a cooling cycle.
As an implementation manner of the present invention, the outlet end of the first evaporator 11 is connected to one end of a first connecting pipe 801, and the other end of the first connecting pipe 801 is connected to one end of the first pipeline 101 and one end of the second pipeline 102 respectively; an inlet end of the first evaporator 11 is connected to one end of a second connection pipe 802, and the other end of the second connection pipe 802 is connected to the other end of the first pipe 101 and the other end of the second pipe 102, respectively; a first circulation pump 91 is provided on the first connection pipe 801 and/or the second connection pipe 802, and the purpose of the first circulation pump 91 is to drive the circulation of the liquid flowing out and in from the first evaporator 11.
Furthermore, the external ice-melting cold-storage refrigeration system further comprises a closed type constant pressure device 1000, the closed type constant pressure device 1000 is connected with an inlet of the first circulating pump 91, and the closed type constant pressure device 1000 is used for supplementing secondary refrigerants into the first connecting pipe and the second connecting pipe and maintaining the pressure of liquid in the external ice-melting cold-storage refrigeration system, so that the purpose of system constant pressure is achieved. Preferably, the coolant can be a glycol solution with a concentration of 25% by mass, and the freezing point of the aqueous solution after the glycol is added is lower, so that the coolant does not freeze at the subzero temperature, and the temperature of the liquid flowing out of the first evaporator 11 is lower in the ice making mode, which is more beneficial to storing cold in the ice storage tank 2.
Further, the ice storage tank 2 comprises an ice storage tank body 21 and an ice storage coil 22, the ice storage tank body 21 is provided with an inner cavity, and the ice storage coil 22 is arranged in the inner cavity; the second pipeline 102 comprises a first branch pipe 1021 and a second branch pipe 1022, two ends of the ice storage coil 22 are respectively connected with one ends of the first branch pipe 1021 and the second branch pipe 1022, and the other end of the first branch pipe 1021 and the other end of the second branch pipe 1022 are respectively two ends of the second pipeline 102; the liquid flowing out from the water return pipeline 5 flows into the inner cavity of the ice storage tank 2 after flowing through the heat exchanger through a third pipeline 103, the ice storage tank body 21 is provided with the water supply port 20 communicated with the inner cavity, and the water supply pipeline 6 is communicated with the water supply port 20.
Preferably, the liquid flowing out of the water return pipe 5 flows into the upper part of the inner cavity of the ice storage tank 2 after passing through the heat exchanger 3 through a third pipe 103, and the water supply port 20 is communicated with the lower part of the inner cavity. By this design, the liquid in the ice bank 2 can be prevented from flowing back into the third pipe 103. Preferably, a valve 73 may be further provided at an end of the third pipe 103 flowing into the ice bank 2 to prevent the liquid in the ice bank 2 from flowing back to the front pipe.
As an implementation manner of the present invention, the third pipeline 103 includes a third branch pipe 1033 and a fourth branch pipe 1034, the water return pipeline 5 is connected to one end of the third branch pipe 1033, the third branch pipe 1033 flows through the heat exchanger, the other end of the third branch pipe 1033 is connected to one end of the fourth branch pipe 1034, the liquid flowing out of the other end of the fourth branch pipe 1034 flows into the ice storage tank 2, preferably, the fourth branch pipe 1034 is provided near the other end thereof with the third valve 73.
Further, one end of the third branch pipe 1033 and one end of the fourth branch pipe 1034 are also connected by a third connection pipe 803. The third connecting pipe 803 is provided for directly melting ice and supplying cold without starting the dual-working-condition refrigeration host 1, the pump 91 and the pump 92 when the system needs little cold. After the third connection pipe 803 is additionally provided, the water flowing out of the water return pipe 5 passes through the ice storage tank 2 to be directly cooled, and then flows into the water supply pipe 6 through the water supply port 20 to supply water to the refrigeration system.
Further, the fourth branch pipe 1034 may be connected to the water supply pipe 6 through a fourth connection pipe 804. By adjusting valve 74, water flowing through 804 is mixed with the ice bank outlet water to prevent the ice bank outlet water temperature from being too low, thereby ensuring a stable water supply temperature.
Further, a fifth valve 75 may be provided at the water supply pipeline 6 near the water supply port 20, and in the ice making mode, cold accumulation may be performed by closing the third valve 73 and the fifth valve 75. When the valve is operated at ordinary times, the flow rate can be adjusted by the opening degree of the fifth valve 75.
Further, in order to enhance the liquid circulation in the pipeline, a second circulation pump 92 is disposed on the third pipeline 103, and a third circulation pump 93 is disposed on the water supply pipeline 6.
In this embodiment, all the valves can be automatically controlled by electric switch valves or electric control valves such as solenoid valves.
To sum up, the external ice-melting cold-storage refrigeration system provided by this embodiment 1 can realize the following four operation modes:
the dual-working-condition main machine single ice making mode: at night, when the electricity price is off-valley, the two first valves 71 can be closed, the two second valves 72 are opened, the dual-working-condition refrigeration host starts the ice making mode, at the moment, the system makes ice, and can freeze part of water originally existing in the ice storage tank 2 into ice, so that the cold energy is stored in the ice storage tank 2 in the form of ice, and the purpose of refrigerating by utilizing the off-valley electricity at night and storing the cold energy in the form of ice, cold water or a solidified phase change material is realized.
The single refrigeration mode of the dual-working-condition main machine is as follows: when the external cold quantity is required, the single-refrigerating mode of the dual-working-condition main machine can be started, the two second valves 72 can be closed, the two first valves 71 are opened, the third valve 73 and the fifth valve 75 are closed, the fourth valve 74 is opened, the dual-working-condition refrigerating main machine starts the refrigerating mode, at the moment, the liquid in the water return pipeline 5 flows through the heat exchanger 3 for heat exchange to cool, and the cooled liquid flows into the water supply pipeline 6 through the pipeline 804 to supply cold to the outside.
Ice melting single cooling mode: when the external cold demand is low, the dual-operating-condition main engine may not be started, and the cold accumulated in the ice storage tank is directly used for cooling, specifically, the second circulation pump 92 may not be started, the two first valves 71 and the two second valves 72 are closed, the third valve 73 and the fifth valve 75 are opened, at this time, the liquid in the water return pipe 5 directly flows into the ice storage tank 2 through the third connection pipe 803 and the fourth branch pipe 1034 to exchange heat with the ice stored in the ice storage tank 2, and the liquid after heat exchange flows into the water supply pipe 6 through the water supply port 20 to supply the cold to the outside.
The ice melting and double-working-condition refrigeration host machine combined cooling mode comprises the following steps: when the requirement for external cold is high, the ice melting and dual-working-condition refrigeration host combined cooling mode can be adopted, the dual-working-condition refrigeration host is started to refrigerate, the two first valves 71 are opened, the two second valves 72 are closed, the third valve 73 and the fifth valve 75 are opened, at this time, liquid in the water return pipeline 5 can flow through the heat exchanger 3, the liquid in the water return pipeline 5 can firstly carry out primary heat exchange cooling in the heat exchanger 3, water subjected to primary heat exchange cooling can continuously flow into the ice storage tank 2 to carry out secondary heat exchange cooling with ice stored in the ice making mode, the temperature of the liquid subjected to secondary cooling can be lower, and at this time, the liquid subjected to secondary cooling can flow into the water supply pipeline 6 through the water supply port 20 to supply cold for the outside.
In the embodiment, a mode that a dual-working-condition refrigeration main machine is connected with an ice storage tank in series is adopted, and the temperature difference between the supply water and the return water is jointly borne by the refrigeration main machine and the ice storage tank, so that the temperature difference between the supply water and the return water can be increased; the mode of the upper stream of the dual-working-condition refrigeration main machine and the lower stream of the ice storage tank is adopted, the water supply temperature of the air-conditioning refrigeration system is close to zero, the low-temperature water supply of the air-conditioning water system can be realized, and conditions are created for realizing low-temperature air supply. Besides, the large temperature difference water supply and return can save the investment of pipes and water system fittings, and the water system conveying energy consumption saved in daily operation is also considerable due to the reduction of water flow.
Moreover, with the utility model discloses a low temperature air supply system that refrigerating system allies oneself with uses can the low temperature cold source advantage that full play ice storage provided. Specifically, the initial investment can be reduced: the reduction of the air volume of the air conditioning system is the most fundamental, direct and effective way for reducing the initial investment; more energy-saving: the capacity of conveying equipment of the air conditioning system is reduced, so that the energy consumption of the conveying equipment is obviously reduced; comfort: because the air supply temperature is reduced, the dehumidification capacity is stronger, and the relative humidity of the indoor air can be controlled to be 30-45%, so that the indoor thermal comfort is improved.
Example 2
In the external ice-melting cold-storage refrigeration system in this embodiment 2, in addition to all the components mentioned in the above embodiment 1, a set of conventional refrigeration main machine working scheme is additionally arranged in parallel to cope with complex working conditions.
In this embodiment, the external ice-melting cold-storage refrigeration system further includes a conventional refrigeration host 200, where the conventional refrigeration host includes a second evaporator 201 and a second condenser 202; the liquid flowing out from the water return pipe 5 flows into the inlet end of the second evaporator 201 through a fourth pipe 104; the liquid flowing out of the outlet end of the second evaporator 202 eventually flows into the water supply pipeline 6; the cooling circulation device 4 is also connected to the second condenser 202, and is used for cooling and circulating the liquid in the second condenser 202.
In this embodiment, a working circuit of the conventional refrigeration main machine is connected in parallel to a working circuit of the original dual-condition refrigeration main machine 1, and the two working circuits can work cooperatively.
Particularly, during the night electricity consumption valley period, because the dual-working-condition refrigeration host 1 is in the ice making mode, if there is a cooling demand, then the working mode of the conventional refrigeration host can be started, at this time, the conventional refrigeration host 200 is started, water in the water return pipeline 5 flows through the second evaporator 201 to be cooled, and the cooled water directly flows into the water supply pipeline 6 through the fourth connecting pipe 804 and the fourth valve 74, so that the purpose that the whole system can also perform normal refrigeration work in the ice making mode is achieved.
In addition, if the amount of cold supplied in the daytime is increased, the requirement cannot be met only by the single ice melting and cold supplying mode provided in embodiment 1, the outlet end of the second evaporator 201 and the part of the third pipeline 103 after flowing through the heat exchanger 3 can be communicated and mixed, and then the water flowing out of the third pipeline 103 is cooled secondarily by the ice storage tank, so that the water temperature difference between the water supply pipeline 6 and the water return pipeline 5 is larger, and the cold supplying capacity is improved.
In addition, the conventional refrigeration main unit 200 can work in combination with any one of the four cooling modes provided in embodiment 1 to improve cooling capacity when the temperature is high in daytime.
To sum up, the utility model provides an external ice melting cold accumulation refrigerating system, which adopts the mode that a double-working condition refrigerating host machine is connected with an ice storage tank in series, the temperature difference of water supply and return is jointly borne by the refrigerating host machine and the ice storage tank, and the temperature difference of water supply and return can be increased; the mode of the upper stream of the dual-working-condition refrigeration main machine and the lower stream of the ice storage tank is adopted, the water supply temperature of the air-conditioning refrigeration system is close to zero, the low-temperature water supply of the air-conditioning water system can be realized, and conditions are created for realizing low-temperature air supply. Besides, the large temperature difference water supply and return can save the investment of pipes and water system fittings, and the water system conveying energy consumption saved in daily operation is also considerable due to the reduction of water flow.
Moreover, with the utility model discloses a low temperature air supply system that refrigerating system allies oneself with uses can the low temperature cold source advantage that full play ice storage provided. Specifically, the initial investment can be reduced: the reduction of the air volume of the air conditioning system is the most fundamental, direct and effective way for reducing the initial investment; more energy-saving: the capacity of conveying equipment of the air conditioning system is reduced, so that the energy consumption of the conveying equipment is obviously reduced; comfort: because the air supply temperature is reduced, the dehumidification capacity is stronger, and the relative humidity of the indoor air can be controlled to be 30-45%, so that the indoor thermal comfort is improved.
Further, the utility model discloses still parallelly connected with the dual mode refrigeration host computer through with conventional refrigeration host computer, satisfied multiple demand mode for refrigerating system's range of application is wider.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
Claims (10)
1. An external ice melting cold accumulation refrigeration system is characterized by comprising a dual-working-condition refrigeration host machine, an ice accumulation groove, a heat exchanger, a cooling circulation device, a water return pipeline and a water supply pipeline;
the dual-working-condition refrigeration main machine comprises a first evaporator and a first condenser;
liquid flowing out of the outlet end of the first evaporator flows through the heat exchanger through a first pipeline and then flows back to the inlet end of the first evaporator;
the liquid flowing out of the outlet end of the first evaporator flows through the ice storage tank through a second pipeline and then flows back to the inlet end of the first evaporator;
liquid flowing out of the water return pipeline flows into the ice storage tank after flowing through the heat exchanger through a third pipeline, a water supply port is formed in the ice storage tank, and the water supply pipeline is communicated with the water supply port;
two ends of the first pipeline are respectively provided with a first valve, and two ends of the second pipeline are respectively provided with a second valve;
the heat exchanger is used for heat exchange between the liquid in the first pipeline and the liquid in the third pipeline;
the cooling circulation device is connected with the first condenser and used for cooling circulation of liquid in the first condenser.
2. The external ice-melt cold-storage refrigeration system according to claim 1, wherein when two first valves on the first pipeline are opened, two second valves on the second pipeline are closed, the dual-working condition refrigeration host machine starts the refrigeration mode, and the temperature of the liquid flowing out of the outlet end of the evaporator is T1; when a second valve on the second pipeline is opened, two first valves on the first pipeline are closed, the dual-working-condition refrigeration host starts an ice making mode, and the temperature of liquid flowing out of the outlet end of the evaporator is T2; wherein T1 > T2.
3. The external ice-melting cold-storage refrigerating system as claimed in claim 1, wherein the outlet end of the first evaporator is connected with one end of a first connecting pipe, and the other end of the first connecting pipe is respectively connected with one end of the first pipeline and one end of the second pipeline;
the inlet end of the first evaporator is connected with one end of a second connecting pipe, and the other end of the second connecting pipe is respectively connected with the other end of the first pipeline and the other end of the second pipeline;
a first circulating pump is arranged on the first connecting pipe and/or the second connecting pipe.
4. The external ice-melting cold-storage refrigeration system according to claim 3, further comprising a closed constant pressure device connected to the inlet end of the first circulating pump, wherein the closed constant pressure device is used for supplementing the coolant to the first connecting pipe and the second connecting pipe and maintaining the pressure of the liquid in the external ice-melting cold-storage refrigeration system.
5. The external ice melt cold storage refrigeration system of claim 1 wherein said ice storage tank comprises an ice storage tank body having an internal cavity and an ice storage coil disposed within said internal cavity;
the second pipeline comprises a first branch pipe and a second branch pipe, two ends of the ice storage coil pipe are respectively connected with one ends of the first branch pipe and the second branch pipe, and the other end of the first branch pipe and the other end of the second branch pipe are respectively two ends of the second pipeline;
liquid flowing out of the water return pipeline flows into the inner cavity of the ice storage tank after flowing through the heat exchanger through a third pipeline, the ice storage tank body is provided with a water supply port communicated with the inner cavity, and the water supply pipeline is communicated with the water supply port.
6. The external ice-melting cold-storage refrigerating system as claimed in claim 1, wherein the third pipeline comprises a third branch pipe and a fourth branch pipe, the water return pipeline is connected with one end of the third branch pipe, the third branch pipe flows through the heat exchanger, the other end of the third branch pipe is connected with one end of the fourth branch pipe, the liquid flowing out of the other end of the fourth branch pipe flows into the ice storage tank, and a third valve is arranged at the fourth branch pipe close to the other end of the fourth branch pipe.
7. The external ice-melting cold-storage refrigeration system according to claim 6, wherein one end of the third branch pipe is connected with one end of the fourth branch pipe through a third connecting pipe, the fourth branch pipe is connected with the water supply pipeline through a fourth connecting pipe, and the fourth connecting pipe is provided with a fourth valve.
8. The external ice-melting cold-storage refrigeration system as claimed in claim 1, wherein a second circulation pump is disposed on the third pipeline, and a third circulation pump is disposed on the water supply pipeline.
9. The external ice-melting cold-storage refrigeration system according to any one of claims 1 to 8, further comprising a conventional refrigeration host machine, wherein the conventional refrigeration host machine comprises a second evaporator and a second condenser;
the liquid flowing out of the water return pipeline flows into the inlet end of the second evaporator through a fourth pipeline; the cooling circulation device is also connected with the second condenser and used for cooling circulation of liquid in the second condenser.
10. The external ice-melting cold-storage refrigeration system according to claim 9, wherein the outlet end of the second evaporator is communicated with the part of the third pipeline after flowing through the heat exchanger.
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| CN201921363572.0U CN210441383U (en) | 2019-08-21 | 2019-08-21 | External ice melting cold accumulation refrigerating system |
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| CN201921363572.0U CN210441383U (en) | 2019-08-21 | 2019-08-21 | External ice melting cold accumulation refrigerating system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608092A (en) * | 2022-02-15 | 2022-06-10 | 欧丰科技(深圳)有限公司 | Parallel ice storage system with heat recovery unit |
| CN114698327A (en) * | 2020-12-31 | 2022-07-01 | 河北思达歌数据科技投资有限公司 | Multistage refrigeration system and refrigeration method |
| CN115013895A (en) * | 2022-06-14 | 2022-09-06 | 河北工程大学 | Transverse heat exchange ice energy storage heat exchanger |
| CN115574392A (en) * | 2022-11-02 | 2023-01-06 | 香港华艺设计顾问(深圳)有限公司 | External ice melting open type primary pump system, cold supply method, medium and equipment thereof |
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2019
- 2019-08-21 CN CN201921363572.0U patent/CN210441383U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114698327A (en) * | 2020-12-31 | 2022-07-01 | 河北思达歌数据科技投资有限公司 | Multistage refrigeration system and refrigeration method |
| CN114608092A (en) * | 2022-02-15 | 2022-06-10 | 欧丰科技(深圳)有限公司 | Parallel ice storage system with heat recovery unit |
| CN115013895A (en) * | 2022-06-14 | 2022-09-06 | 河北工程大学 | Transverse heat exchange ice energy storage heat exchanger |
| CN115013895B (en) * | 2022-06-14 | 2023-05-26 | 河北工程大学 | Transverse heat exchange ice energy storage heat exchanger |
| CN115574392A (en) * | 2022-11-02 | 2023-01-06 | 香港华艺设计顾问(深圳)有限公司 | External ice melting open type primary pump system, cold supply method, medium and equipment thereof |
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