阅读说明：本技术 一种蓄能式换热系统及蓄能式换热系统的换热方法 (Energy storage type heat exchange system and heat exchange method of energy storage type heat exchange system ) 是由 黄进 黄绍新 黄慷 赵庆珠 于 2020-05-20 设计创作，主要内容包括：本发明公开一种蓄能式换热系统及蓄能式换热系统的换热方法,其中,该蓄能式换热系统包括换热机和蓄能装置,所述蓄能装置内设有蓄能介质,所述换热机具有蒸发器和冷凝器,所述蒸发器和所述冷凝器中的一者与用户侧的换热部件通过管路相连；所述蓄能装置与所述蒸发器和所述冷凝器中的一者以及所述换热部件均通过管路相连,所述蓄能装置还与所述蒸发器和所述冷凝器中的另一者通过管路相连；释能工况下,所述蓄能装置先与所述换热部件连通,直至所述蓄能装置无法为所述换热部件供能,然后,所述蓄能装置与所述蒸发器和所述冷凝器中的另一者连通。本发明所提供蓄能式换热系统可以实现蓄能装置能量的二次释放,使得蓄能装置内能量的利用更为彻底。(The invention discloses an energy storage type heat exchange system and a heat exchange method of the energy storage type heat exchange system, wherein the energy storage type heat exchange system comprises a heat exchanger and an energy storage device, an energy storage medium is arranged in the energy storage device, the heat exchanger is provided with an evaporator and a condenser, and one of the evaporator and the condenser is connected with a heat exchange part at a user side through a pipeline; the energy storage device is connected with one of the evaporator and the condenser and the heat exchange component through pipelines, and the energy storage device is also connected with the other of the evaporator and the condenser through pipelines; under the energy release working condition, the energy storage device is communicated with the heat exchange component firstly until the energy storage device cannot supply energy to the heat exchange component, and then the energy storage device is communicated with the other one of the evaporator and the condenser. The energy storage type heat exchange system provided by the invention can realize secondary release of energy of the energy storage device, so that the energy in the energy storage device is utilized more thoroughly.)

1. An energy storage type heat exchange system comprises a heat exchanger (1) and an energy storage device (2), wherein an energy storage medium is arranged in the energy storage device (2), the heat exchanger (1) is provided with an evaporator (11) and a condenser (12), one of the evaporator (11) and the condenser (12) is connected with a heat exchange part (31) of a user side (3) through a pipeline, the energy storage device (2) is connected with one of the evaporator (11) and the condenser (12) and the heat exchange part (31) through pipelines, and the energy storage device (2) is also connected with the other of the evaporator (11) and the condenser (12) through a pipeline;

under the energy release working condition, the energy storage device (2) is communicated with the heat exchange component (31) firstly until the energy storage device (2) cannot supply energy to the heat exchange component (31), and then the energy storage device (2) is communicated with the other one of the evaporator (11) and the condenser (12).

2. The recuperative heat exchange system according to claim 1, characterized in that a first heat exchange circuit (a1) is provided between the heat exchanger (1) and the heat exchange element (31), the energy storage device (2) is provided with an outlet flow line (21) and an inlet flow line (22), and the outlet flow line (21) and the inlet flow line (22) are connected to the first heat exchange circuit (a 1).

3. The accumulator heat exchange system according to claim 2, characterized in that the outlet flow line (21) is connected to the first heat exchange circuit (a1) through a first on-off valve (211a), and the inlet flow line (22) is connected to the first heat exchange circuit (a1) through a second on-off valve (221 a).

4. The energy-accumulating heat exchange system according to claim 2, further comprising a heat exchange tower (4), wherein a second heat exchange loop (a2) is arranged between the heat exchanger (1) and the heat exchange tower (4), and the outlet flow line (21) and the inlet flow line (22) are connected to the second heat exchange loop (a 2).

5. The recuperative heat exchange system according to claim 4, characterized in that the outlet flow line (21) is connected to the second heat exchange circuit (A2) via a third on/off valve (212a), and the inlet flow line (22) is connected to the second heat exchange circuit (A2) via a fourth on/off valve (222 a).

6. The stored energy heat exchange system according to claim 4, wherein the outlet flow line (21) comprises a first outlet flow path (211) and a second outlet flow path (212), the inlet flow line (22) comprises a first inlet flow path (221) and a second inlet flow path (222), the first outlet flow path (211) and the first inlet flow path (221) are connected to the first heat exchange loop (A1), one end of the second outlet flow path (212) is connected to the first outlet flow path (211) through a fifth switch valve (211b), the other end of the second outlet flow path is connected to the second heat exchange loop (A2), one end of the second inlet flow path (222) is connected to the first inlet flow path (221) through a sixth switch valve (221b), and the other end of the second inlet flow path is connected to the second heat exchange loop (A2).

7. The energy storing heat exchange system according to any one of claims 1 to 6, further comprising a temperature sensor for monitoring the medium temperature of the energy storage medium of the energy storage means (2);

under the energy releasing working condition, when the medium temperature is lower than a first set temperature, the energy storage device (2) is continuously communicated with the heat exchange component (31), and when the medium temperature is higher than or equal to the first set temperature and lower than a second set temperature, the energy storage device (2) is continuously communicated with the other one of the evaporator (11) and the condenser (12);

under the working condition of energy storage, when the medium temperature is higher than a third set temperature, the energy storage device (2) is continuously communicated with one of the evaporator (11) and the condenser (12);

wherein the third set temperature < the first set temperature < the second set temperature.

8. The energy accumulating heat exchange system of claim 7, further comprising a controller in signal connection with the temperature sensor, the controller being capable of controlling the connection or disconnection of the energy accumulating means (2) to other components depending on the medium temperature.

9. An energy accumulating heat exchange system according to any one of claims 1-6, wherein the heat exchanger (1) is a refrigerator or a heat pump; and/or the presence of a gas in the gas,

the energy storage medium is water, ice or molten salt.

10. A heat exchange method of an energy storage type heat exchange system, comprising a heat exchanger (1) and an energy storage device (2), wherein an energy storage medium is arranged in the energy storage device (2), the heat exchanger (1) is provided with an evaporator (11) and a condenser (12), one of the evaporator (11) and the condenser (12) is connected with a heat exchange part (31) of a user side (3) through a pipeline, and the heat exchange method is characterized by comprising an energy release step, and the energy release step comprises:

step S1, controlling the energy storage device (2) to be communicated with the heat exchange component (31) until the energy storage device (2) cannot supply energy to the heat exchange component (31);

step S2, controlling the energy storage device (2) to be communicated with the other one of the evaporator (11) and the condenser (12).

11. The heat exchange method of the energy storage type heat exchange system according to claim 10, wherein the step S1 specifically comprises:

step S11, acquiring the medium temperature of the energy storage medium of the energy storage device (2);

step S12, comparing the medium temperature with a first set temperature, and if the medium temperature is less than the first set temperature, executing the step S13;

and step S13, controlling the energy storage device (2) to be communicated with the heat exchange component (31).

12. The heat exchange method of the energy storage type heat exchange system according to claim 11, wherein in the step S12, if the medium temperature is greater than or equal to the first set temperature, the step S14 is executed;

step S14, comparing the medium temperature with a second set temperature, and if the medium temperature is less than the second set temperature, executing step S2.

13. The method of exchanging heat of an accumulating heat exchange system of any one of claims 10-12 further comprising the step of accumulating energy comprising:

step S3, controlling the energy storage device (2) to be communicated with one of the evaporator (11) and the condenser (12).

14. The heat exchange method of the energy storage type heat exchange system according to claim 13, wherein the step S3 is preceded by:

step S11, acquiring the medium temperature of the energy storage medium of the energy storage device (2);

step S15, comparing the medium temperature with a third set temperature, and if the medium temperature is greater than the third set temperature, executing step S3.

Technical Field

The invention relates to the technical field of heat exchange systems, in particular to an energy storage type heat exchange system and a heat exchange method of the energy storage type heat exchange system.

Background

Generally speaking, the technical purpose of the chilled water storage air conditioning system is to utilize the policy of time-of-use electricity price of a power grid and combine the day and night load characteristics (the load is mainly in the daytime, and no load or little load is applied at night) of the air conditioning system, and adopt the technical measures of adding a chilled water tank to store cold for the chilled water tank through a refrigerator at night, and then directly supply cold through the chilled water tank or jointly supply cold with the refrigerator at the daytime, so that part of the power consumption is transferred from the daytime to the nighttime, thereby realizing the operation purpose of 'peak shifting and valley filling' of the power grid at the user side, and enabling the user to enjoy the economic benefit of time-of electricity price.

However, the existing chilled water storage air conditioning system does not completely utilize the cooling capacity in the chilled water tank, and therefore, how to provide a scheme to more fully utilize the cooling capacity in the chilled water tank still remains a technical problem to be solved by technical personnel in the field.

Disclosure of Invention

The invention aims to provide an energy storage type heat exchange system and a heat exchange method of the energy storage type heat exchange system, wherein the energy storage type heat exchange system can realize secondary release of energy of an energy storage device, so that the energy in the energy storage device is utilized more thoroughly.

In order to solve the technical problem, the invention provides an energy storage type heat exchange system which comprises a heat exchanger and an energy storage device, wherein an energy storage medium is arranged in the energy storage device, the heat exchanger is provided with an evaporator and a condenser, and one of the evaporator and the condenser is connected with a heat exchange part at a user side through a pipeline; the energy storage device is connected with one of the evaporator and the condenser and the heat exchange component through pipelines, and the energy storage device is also connected with the other of the evaporator and the condenser through pipelines; under the energy release working condition, the energy storage device is communicated with the heat exchange component firstly until the energy storage device cannot supply energy to the heat exchange component, and then the energy storage device is communicated with the other one of the evaporator and the condenser.

So set up, the energy in the energy storage device can also participate in the inside cryogen circulation of heat exchanger after releasing in the heat transfer part of user side to carry out the secondary release of energy, make the utilization of energy in the energy storage device can be more thorough.

Optionally, a first heat exchange loop is arranged between the heat exchanger and the heat exchange component, the energy storage device is provided with an outflow pipeline and an inflow pipeline, and the outflow pipeline and the inflow pipeline are both connected to the first heat exchange loop.

Optionally, the outlet pipeline is connected to the first heat exchange loop through a first switch valve, and the inlet pipeline is connected to the first heat exchange loop through a second switch valve.

Optionally, the heat exchanger further comprises a heat exchange tower, a second heat exchange loop is arranged between the heat exchanger and the heat exchange tower, and the outflow pipeline and the inflow pipeline are both connected to the second heat exchange loop.

Optionally, the outlet pipeline is connected to the second heat exchange loop through a third switch valve, and the inlet pipeline is connected to the second heat exchange loop through a fourth switch valve.

Optionally, the outflow pipeline includes a first outflow channel and a second outflow channel, the inflow pipeline includes a first inflow channel and a second inflow channel, the first outflow channel and the first inflow channel are connected to the first heat exchange loop, one end of the second outflow channel is connected to the first outflow channel through a fifth switch valve, the other end of the second outflow channel is connected to the second heat exchange loop, one end of the second inflow channel is connected to the first inflow channel through a sixth switch valve, and the other end of the second inflow channel is connected to the second heat exchange loop.

Optionally, the system further comprises a temperature sensor for monitoring the medium temperature of the energy storage medium of the energy storage device; under the energy releasing working condition, when the medium temperature is lower than a first set temperature, the energy storage device is continuously communicated with the heat exchange component, and when the medium temperature is higher than or equal to the first set temperature and lower than a second set temperature, the energy storage device is continuously communicated with the other one of the evaporator and the condenser; under the working condition of energy storage, when the temperature of the medium is higher than a third set temperature, the energy storage device is continuously communicated with one of the evaporator and the condenser; wherein the third set temperature < the first set temperature < the second set temperature.

Optionally, the system further comprises a controller, wherein the controller is in signal connection with the temperature sensor, and the controller can control the connection or disconnection of the energy storage device and other components according to the temperature of the medium.

Optionally, the heat exchanger is a refrigerator or a heat pump; and/or the energy storage medium is water, ice or molten salt.

The invention also provides a heat exchange method of the energy storage type heat exchange system, which comprises a heat exchanger and an energy storage device, wherein an energy storage medium is arranged in the energy storage device, the heat exchanger is provided with an evaporator and a condenser, and one of the evaporator and the condenser is connected with a heat exchange part at a user side through a pipeline; the heat exchange method comprises an energy releasing step, wherein the energy releasing step comprises the following steps: step S1, controlling the energy storage device to be communicated with the heat exchange component until the energy storage device cannot supply energy to the heat exchange component; step S2, controlling the energy storage device to be communicated with the other one of the evaporator and the condenser.

By adopting the method, the energy in the energy storage device can also participate in the refrigerant circulation in the heat exchanger after being released in the heat exchange component at the user side so as to carry out secondary release of the energy, so that the energy in the energy storage device can be more thoroughly utilized.

Optionally, the step S1 specifically includes: step S11, acquiring the medium temperature of the energy storage medium of the energy storage device; step S12, comparing the medium temperature with a first set temperature, and if the medium temperature is less than the first set temperature, executing the step S13; and step S13, controlling the energy storage device to be communicated with the heat exchange component.

Optionally, in the step S12, if the medium temperature is greater than or equal to the first set temperature, the step S14 is executed; step S14, comparing the medium temperature with a second set temperature, and if the medium temperature is less than the second set temperature, executing step S2.

Optionally, the heat exchange method further comprises an energy storage step, wherein the energy storage step comprises: step S3, controlling the energy storage device to be communicated with one of the evaporator and the condenser.

Optionally, before the step S3, the method further includes: step S11, acquiring the medium temperature of the energy storage medium of the energy storage device; step S15, comparing the medium temperature with a third set temperature, and if the medium temperature is greater than the third set temperature, executing step S3.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of an energy storage heat exchange system provided by the present invention;

fig. 2 is a flow chart of a heat exchange method of the energy storage type heat exchange system provided by the invention.

The reference numerals in fig. 1-2 are illustrated as follows:

1 heat exchanger, 11 evaporator, 12 condenser;

2, an energy storage device, a 21 outlet pipeline, a 211 first outlet channel, a 211a first switch valve, a 211b fifth switch valve, 212 second outlet channel, 212a third switch valve, 22 inlet pipeline, 221 first inlet channel, 221a second switch valve, 221b sixth switch valve, 222 second inlet channel and 222a fourth switch valve;

3 user side, 31 heat exchange components;

4, a heat exchange tower;

a1 first heat exchange loop, a2 second heat exchange loop.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The terms "first", "second", and the like, as used herein, are used for convenience only to describe two or more structures or components that are identical or similar in structure and/or function, and do not denote any particular limitation on the order.

Example one

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an energy storage type heat exchange system provided in the present invention.

As shown in fig. 1, the present invention provides an energy storage type heat exchange system, which includes a heat exchanger 1 and an energy storage device 2, an energy storage medium is arranged in the energy storage device 2, the heat exchanger 1 has an evaporator 11 and a condenser 12, one of the evaporator 11 and the condenser 12 is connected with a heat exchange component 31 of a user side 3 through a pipeline; moreover, the energy storage device 2 is connected with one of the evaporator 11 and the condenser 12 and the heat exchange part 31 through pipelines, and the energy storage device 2 is also connected with the other of the evaporator 11 and the condenser 12 through pipelines; under the energy release working condition, the energy storage device 2 is firstly communicated with the heat exchange component 31 until the energy storage device 2 cannot supply energy to the heat exchange component 31, and then the energy storage device 2 is communicated with the other one of the evaporator 11 and the condenser 12.

With the arrangement, after the energy in the energy storage device 2 is released in the heat exchange component 31 of the user side 3, the energy can also participate in the refrigerant circulation in the heat exchanger 1 to release the energy for the second time, so that the energy in the energy storage device 2 can be used more thoroughly.

The heat exchanger 1 may be a refrigerator, such as a magnetic suspension centrifuge, or a heat pump. In other words, the energy storage type heat exchange system provided by the invention can be a refrigerating system or a heating system.

Taking the scheme of adopting the refrigerator as an example, at this time, the refrigerator is communicated with the heat exchange component 31 of the user side 3 through the evaporator 11, the structure of the heat exchange component 31 is not limited herein, the energy stored in the energy storage device 2 is the cold quantity, and taking the water storage as an example, the water in the energy storage device 2 is generally about 4-5 degrees, and the water is assumed to be 4 degrees below. In a traditional scheme, water in the energy storage device 2 only participates in circulation of the user side 3, and specifically, the water can be used alone or jointly with a refrigerator, after a period of time, the temperature of the water in the energy storage device 2 is consistent with the temperature of water discharged from the user side 3, the temperature is generally 12 degrees, at this time, the water in the energy storage device 2 cannot provide cold energy for the user side 3 any more, the water in the energy storage device 2 does not participate in circulation any more and is in an idle state, and the cold energy is stored in the energy storage device 2 again until the refrigerating machine at night (idle time). Analysis shows that the utilization of the cold energy in the energy storage device 2 by the traditional scheme is 8-degree temperature difference, and the electric quantity for shifting the peak and filling the valley is the electric quantity consumed by making up the 8-degree temperature difference when the refrigerator is started at night.

After the scheme provided by the invention is adopted, the water with the temperature of 12 ℃ in the energy storage device 2 is not left unused and can be introduced into the condenser 12 of the heat exchanger 1 to participate in circulation, and generally, through the circulation, the water in the energy storage device 2 can finally reach 25 ℃, namely, the utilization of the cold energy in the energy storage device 2 can be improved from the original temperature difference of 8 ℃ to the temperature difference of 21 ℃, and the utilization of the cold energy in the energy storage device 2 can be more thorough; moreover, for the refrigerator, water at 12 degrees is introduced into the condenser 12, so that the cop (coefficient of performance) value of the refrigerator is greatly improved, the efficiency of the refrigerator can be improved, and the power consumption of the refrigerator in the daytime can be reduced; the electric quantity for peak shifting and valley filling at night is the electric quantity consumed by the temperature difference of 21 degrees, and compared with the traditional scheme, the electric quantity for peak shifting and valley filling can be more, so that a user can more fully enjoy the benefits brought by the national time-of-use electricity price.

In addition, since the energy storage device 2 releases less energy in the conventional solution, if the amount of energy release is increased, the volume of the energy storage device 2 can only be increased, which results in an excessive space occupation of the energy storage device 2. After the scheme is adopted, because the utilization of the energy in the energy storage medium is more thorough, the energy storage medium with the same volume can release more energy, the volume requirement on the energy storage device 2 can be reduced, and the occupied space of the energy storage device 2 can be reduced.

The above description has been given by taking the heat exchanger 1 as an example of a refrigerator, and when the heat exchanger 1 is a heat pump, it can be connected to the heat exchange part 31 on the user side 3 through the condenser 12.

The energy storage medium in the energy storage device 2 may be ice, molten salt, or the like in addition to the aforementioned water, and the ice stores and releases more energy than water, but the structure of the energy storage device 2 is relatively complicated because of the phase change involved. After the scheme provided by the invention is adopted, the energy released by water energy storage can be greatly improved, ice energy storage can be replaced to a certain extent, meanwhile, the structural complexity of the energy storage device 2 is not increased, and the popularization and the application of the water energy storage are facilitated.

A first heat exchange loop a1 may be provided between the heat exchanger 1 and the heat exchange component 31, the energy storage device 2 may be provided with an outlet flow pipeline 21 and an inlet flow pipeline 22, and both the outlet flow pipeline 21 and the inlet flow pipeline 22 may be connected to the first heat exchange loop a 1. When the user side 3 is powered, the energy storage device 2 can be powered alone, or the energy storage device 2 and the heat exchanger 1 can be powered jointly, and the determination can be specifically combined with the actual situation.

In detail, the outflow pipeline 21 may be connected to the first heat exchange circuit a1 through the first switch valve 211a, the inflow pipeline 22 may be connected to the first heat exchange circuit a1 through the second switch valve 221a, and both the first switch valve 211a and the second switch valve 221a may be three-way valves, so that the communication states of the heat exchanger 1, the accumulator 2, and the heat exchange component 31 may be switched by one valve body, which is beneficial to simplifying the pipeline structure.

The on position of the first on-off valve 211a may not be the connection point of the outlet flow line 21 and the first heat exchange circuit a1, for example, the first on-off valve 211a may also be connected to the outlet flow line 21, in which case the first on-off valve 211a may be a general two-way valve. Similarly, the position of the second on-off valve 221a may not be a connection point between the inlet line 22 and the first heat exchange circuit a1, and for example, the second on-off valve 221a may be connected to the inlet line 22, and in this case, the second on-off valve 221a may be a normal two-way valve.

Further, a heat exchange tower 4 can be further included, and a second heat exchange loop A2 can be arranged between the heat exchanger 1 and the heat exchange tower 4 to form a refrigerant circulation loop of the heat exchanger 1 in a normal state in a combination manner; both the outlet flow line 21 and the inlet flow line 22 may be connected to the second heat exchange circuit a2, so that the energy storage medium in the energy storage device 2 is introduced into the second heat exchange circuit a2 when necessary, thereby performing secondary release of the energy stored in the energy storage medium. Likewise, the energy storage device 2 may be in communication with the other of the evaporator 11 and the condenser 12 alone, or the energy storage device 2 may be in communication with the other of the evaporator 11 and the condenser 12 in combination with the heat exchange tower 4. The heat exchange tower 4 may be an open heat exchange tower or a closed heat exchange tower.

Similar to the connection structure of the outlet pipe 21, the inlet pipe 22 and the first heat exchange circuit a1, the outlet pipe 21 may be connected to the second heat exchange circuit a2 through a third on/off valve 212a, and the inlet pipe 22 may be connected to the second heat exchange circuit a2 through a fourth on/off valve 222a, in which case, both the third on/off valve 212a and the fourth on/off valve 222a may be three-way valves. Of course, the third on-off valve 212a and the fourth on-off valve 222a may also adopt other valve body structures, which are specifically related to their installation positions and the like.

With continued reference to fig. 1, the outflow pipeline 21 may include a first outflow pipeline 211 and a second outflow pipeline 212, the inflow pipeline 22 may include a first inflow pipeline 221 and a second inflow pipeline 222, the first outflow pipeline 211 and the first inflow pipeline 221 may be connected to the first heat exchange circuit a1, one end of the second outflow pipeline 212 may be connected to the first outflow pipeline 211 through a fifth switch valve 211b, the other end of the second outflow pipeline may be connected to the second heat exchange circuit a2, one end of the second inflow pipeline 222 may be connected to the first inflow pipeline 221 through a sixth switch valve 221b, the other end of the second inflow pipeline may be connected to the second heat exchange circuit a2, and both the fifth switch valve 211b and the sixth switch valve 221b may be three-way valves.

The second outlet flow path 212 is connected to the first outlet flow path 211, and the second inlet flow path 222 is connected to the first inlet flow path 221, so that the energy storage device 2 may have only one inlet and outlet, or in addition, the second outlet flow path 212 and the second inlet flow path 222 may be directly connected to the energy storage device 2, and in this case, the energy storage device 2 may have two inlets and two outlets.

The timing of the energy storage means 2 for supplying energy to the heat exchanger 1 may be determined empirically, for example, it may be determined empirically how long it takes for the energy storage means 2 to supply energy to the user side 3, for example, 3 hours, and then after 3 hours, the energy storage means 2 may be controlled to communicate with the other of the evaporator 11 and the condenser 12.

In order to increase the accuracy of the control, a temperature sensor (not shown) may also be provided for monitoring the medium temperature of the energy storage medium of the energy storage device 2, in particular the medium temperature at the outlet side or in the interior of the energy storage device 2.

Then, a first set temperature, a second set temperature, and a third set temperature may be set, the first set temperature may be the outlet water temperature of the user side 3, the second set temperature may be the outlet water temperature of the other of the evaporator 11 and the condenser 12, the third set temperature may be the energy storage temperature of the energy storage device 2, generally speaking, the third set temperature < the first set temperature < the second set temperature, taking the heat exchanger 1 as a refrigerator as an example, the first set temperature may be the aforementioned 12 degrees, the second set temperature may be the aforementioned 25 degrees, and the third set temperature may be the aforementioned 4 degrees.

Under the energy releasing working condition, when the medium temperature is lower than the first set temperature, the energy storage device 2 can be continuously communicated with the heat exchange component 31 to continuously supply energy to the heat exchange component 31 of the user side 3; when the medium temperature is greater than or equal to the first set temperature and less than the second set temperature, the energy storage device 2 cannot continue to supply energy to the user side 3, and the energy storage device 2 may be continuously communicated with the other of the evaporator 11 and the condenser 12 to participate in the refrigerant cycle of the heat exchanger 1, thereby achieving secondary release of energy.

In the energy storage condition, when the medium temperature is higher than the third set temperature, the energy storage device 2 and one of the evaporator 11 and the condenser 12 can be continuously communicated to continuously store energy in the energy storage device 2. The energy storage working condition can be known, the energy storage time can be judged by experience, and then the heat exchanger 1 is controlled to be started and disconnected.

After the medium temperature is measured, the communication state of each of the aforementioned on-off valves may be manually switched by a worker. Or, a controller can be further arranged, the controller can be in signal connection with the temperature sensor and the switch valves, and the controller can control the on-off state of the corresponding switch valve according to the medium temperature measured by the temperature sensor, so that the energy storage device 2 is controlled to be connected with or disconnected from other components, and automatic switching of different working states is achieved.

Example two

Referring to fig. 2, fig. 2 is a flow chart of a heat exchange method of an energy storage type heat exchange system according to an embodiment of the present invention.

As shown in fig. 2, the present invention further provides a heat exchange method of an energy storage type heat exchange system, which includes a heat exchanger 1 and an energy storage device 2, an energy storage medium is disposed in the energy storage device 2, the heat exchanger 1 has an evaporator 11 and a condenser 12, one of the evaporator 11 and the condenser 12 is connected to a heat exchange component 31 on a user side 3 through a pipeline; the heat exchange method comprises an energy releasing step, wherein the energy releasing step comprises the following steps: step S1, the energy storage device 2 is controlled to be communicated with the heat exchange component 31 until the energy storage device 2 cannot supply energy to the heat exchange component 31; step S2, the energy storage device 2 is controlled to communicate with the other of the evaporator 11 and the condenser 12.

By adopting the method, the energy in the energy storage device 2 can also participate in the refrigerant circulation in the heat exchanger 1 after being released in the heat exchange part 31 at the user side 3 so as to carry out secondary release of the energy, so that the energy in the energy storage device 2 can be more thoroughly utilized.

Specifically, step S1 may include: step S11, acquiring a medium temperature of the energy storage medium of the energy storage device 2; step S12, comparing the medium temperature with the first set temperature, if the medium temperature is less than the first set temperature, executing step S13; and step S13, controlling the energy storage device 2 to be communicated with the heat exchange part 31.

The medium temperature of the energy storage medium can be obtained by arranging a temperature sensor, and the arrangement position of the temperature sensor can be the outlet side of the energy storage device 2 or the inside of the energy storage device 2; the first set temperature may be a critical temperature for whether the energy storage device 2 can supply energy to the user side 3, and specifically may be a water outlet temperature of the heat exchanging component 31, for example, 12 degrees as shown in the first embodiment, before the medium temperature reaches 12 degrees, the energy storage medium in the energy storage device 2 may be introduced into the heat exchanging component 31 to participate in the energy supply of the user side 3. It can be appreciated that the energy storage means 2 can be operated independently of the energy supply to the user side 3 and can be operated in conjunction with the heat exchanger 1.

In step S12, if the medium temperature is greater than or equal to the first set temperature, go to step S14; step S14, comparing the medium temperature with the second set temperature, and if the medium temperature is less than the second set temperature, executing step S2.

The second set temperature may be a critical temperature at which the energy storage device 2 can participate in the refrigerant cycle of the heat exchanger 1, and specifically may be a leaving water temperature of the other of the evaporator 11 and the condenser 12, and as shown in the first embodiment at 25 degrees, before the medium temperature reaches 25 degrees, the energy storage medium in the energy storage device 2 may be introduced into the other of the evaporator 11 and the condenser 12 to participate in the refrigerant cycle of the heat exchanger 1 itself.

In addition to the arrangement of the temperature sensor, the steps S1 and S2 may be performed empirically, for example, it may be determined empirically how long the energy storage device 2 needs to supply energy to the user side 3, for example, 3 hours, and then after 3 hours, the energy storage device 2 may be controlled to communicate with the other of the evaporator 11 and the condenser 12.

Further, the heat exchange method may further include an energy storage step, and the energy storage step may include: step S3, the energy storage device 2 is controlled to communicate with one of the evaporator 11 and the condenser 12. The energy storage device 2 is configured to store energy at night (idle time).

Step S3 may be preceded by: step S11, acquiring a medium temperature of the energy storage medium of the energy storage device 2; step S15, comparing the medium temperature with the third setting temperature, and if the medium temperature is higher than the third setting temperature, executing step S3.

The third set temperature is the charging temperature of the energy storage means 2, e.g. 4 degrees in the first embodiment, before the medium temperature is reduced to 4 degrees, the heat exchanger 1 may be continuously opened to store sufficient energy for the charging medium in the energy storage means 2.

Similarly, the step S3 may be performed empirically, for example, it may be determined empirically how long it will generally take to complete the energy storage, and then the heat exchanger 1 may be controlled to operate for a correspondingly long time at night.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.