Energy recovery system

Abstract

The utility model provides an energy recovery system. The energy recovery system comprises a cooling tower; the heat recovery refrigerator comprises a first heating medium pipe and a second heating medium pipe; the cooling air conditioner comprises a heating unit; the first connecting pipeline group comprises a first pipeline and a second pipeline, the first pipeline is connected with one end of the first heating medium pipe and an inlet of the cooling tower, and the second pipeline is connected with the other end of the first heating medium pipe and an outlet of the cooling tower; the second connecting pipeline group is connected with the second heating medium pipe and the heating unit; the temperature sensor is used for testing the temperature of the second connecting pipeline group; the pump is located in the second pipeline, the pump comprises a motor and a frequency converter, and the frequency converter is used for adjusting the rotating speed of the motor; and the frequency controller is used for controlling the frequency of the frequency converter according to the temperature tested by the temperature sensor. The operation stability of the cooling air conditioner in the energy recovery system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat recovery equipment field, concretely relates to an energy recovery system. BACKGROUND

[0002] With the rapid development of society, energy problem has been paid more and more attention. At present, the heat in the refrigerant pipe of heat recovery chiller is released to the heat medium pipe through the heat recovery condenser, and the heat in the heat medium pipe is dissipated through the cooling tower, and the heat in the heat medium pipe can also be recycled and utilized, for example, the heat in the heat medium pipe is transmitted to the industrial air conditioner for preheating. SUMMARY

[0003] The technical problem to be solved by the utility model is how to improve the cooling air conditioner operation stability in the energy recovery system.

[0004] In order to solve the above technical problem, the utility model provides an energy recovery system, comprising: a cooling tower; a heat recovery chiller comprising a first heat medium pipe and a second heat medium pipe; a cooling air conditioner comprising a heating unit; a first connecting pipe group comprising a first pipe and a second pipe, the first pipe is connected with one end of the first heat medium pipe and the inlet of the cooling tower, and the second pipe is connected with the other end of the first heat medium pipe and the outlet of the cooling tower; a second connecting pipe group connecting the second heat medium pipe and the heating unit; a temperature sensor for testing the temperature of the second connecting pipe group; a pump located in the second pipe, the pump comprising a motor and a frequency converter, the frequency converter is used for adjusting the rotating speed of the motor; a frequency controller for controlling the frequency of the frequency converter according to the temperature tested by the temperature sensor.

[0005] Optionally, the frequency controller comprises a reference frequency setting unit, a reference temperature setting unit, a temperature comparator and a frequency compensation unit, the reference frequency setting unit is used for setting the reference frequency, the reference temperature setting unit is used for setting the reference temperature, the temperature comparator is used for obtaining the temperature difference between the temperature tested by the temperature sensor and the reference temperature, and the frequency compensation unit is used for setting the frequency of the frequency converter according to the reference frequency and the temperature difference.

[0006] Optionally, the heat recovery chiller further comprises a heat recovery condenser and a refrigerant pipe, and the heat in the refrigerant pipe is released into the first heat medium pipe and the second heat medium pipe through the heat recovery condenser.

[0007] Optionally, the heating unit comprises a heating pipeline; the second connecting pipeline set comprises a third pipeline and a fourth pipeline, the third pipeline connects an inlet of the heating pipeline and one end of the second heat medium pipeline, and the fourth pipeline connects an outlet of the heating pipeline and the other end of the second heat medium pipeline; wherein the temperature sensor is used for testing the temperature of the third pipeline.

[0008] Optionally, the system further comprises a first automatic valve in the first pipeline.

[0009] Optionally, the first automatic valve is used for adjusting the flow of the first pipeline according to the temperature tested by the temperature sensor.

[0010] Optionally, the system further comprises a connecting pipeline, one end of the connecting pipeline is connected to the first pipeline, and the other end of the connecting pipeline is connected to the second pipeline; a second automatic valve is in the connecting pipeline; wherein the pump is located between the connection of the connecting pipeline and the second pipeline and the first heat medium pipeline.

[0011] Optionally, the second automatic valve is used for adjusting the flow of the connecting pipeline according to the temperature tested by the temperature sensor.

[0012] Optionally, the cooling air conditioner comprises a cooling unit, and the cooling unit comprises a cooling pipeline; wherein the energy recovery system further comprises a third connecting pipeline set connecting the refrigerant pipeline and the cooling pipeline.

[0013] Optionally, the third connecting pipeline set comprises a fifth pipeline and a sixth pipeline, the fifth pipeline connects one end of the refrigerant pipeline and an inlet of the cooling pipeline, and the sixth pipeline connects the other end of the refrigerant pipeline and an outlet of the cooling pipeline.

[0014] Optionally, the adjustment precision of the first automatic valve on the flow of the first pipeline is less than the adjustment precision of the pump on the flow of the second pipeline.

[0015] Optionally, the adjustment precision of the second automatic valve on the flow of the connecting pipeline is less than the adjustment precision of the pump on the flow of the second pipeline.

[0016] The utility model at least has following beneficial effects:

[0017] The energy recovery system provided in the technical scheme of the utility model, set frequency controller, frequency controller is used for controlling frequency converter's frequency according to temperature sensor's temperature testing, frequency converter is used for adjusting motor's rotating speed, frequency converter's rotating speed is different to motor at different frequencies, and motor's rotating speed influences pump's flow adjustment to second pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in prior art, the drawings needed in the specific embodiment or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.

[0019] Figure 1 The schematic diagram of the energy recovery system in an embodiment of the application;

[0020] Figure 2 The schematic diagram of the frequency controller in an embodiment of the application. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, and obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the limitation of the utility model. In addition, the term "first", "second", "third" is only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it needs to explain, unless otherwise specified and limited, the term "installation", "connection", "connection" should be broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through the intermediate medium, can also be the communication between two elements, can be wireless connection, can also be wired connection. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0025] An embodiment of the utility model provides an energy recovery system, referring to Figure 1 , comprising:

[0026] Cooling tower 100;

[0027] Heat recovery chiller 120, comprising first heat medium pipe 121 and second heat medium pipe 122;

[0028] Cooling air conditioner 180, the cooling air conditioner comprises heating unit 181;

[0029] First connecting pipe group, comprising first pipe 131 and second pipe 132, the first pipe 131 is connected one end of the first heat medium pipe 121 and the inlet of the cooling tower 100, and the second pipe 132 is connected the other end of the first heat medium pipe 121 and the outlet of the cooling tower 100;

[0030] Second connecting pipe group, connecting the second heat medium pipe 122 and the heating unit 181;

[0031] Temperature sensor 110 for testing the temperature of the second connecting pipe group;

[0032] A pump 190 is arranged in the second pipeline 132, the pump 190 comprises a motor and a frequency converter, the frequency converter is used to adjust the rotating speed of the motor.

[0033] A frequency controller 170 is arranged, the frequency controller 170 is used to control the frequency of the frequency converter according to the temperature tested by the temperature sensor 110.

[0034] In the embodiment, the frequency controller 170 is arranged, the frequency controller 170 is used to control the frequency of the frequency converter according to the temperature tested by the temperature sensor 110, the frequency converter is used to adjust the rotating speed of the motor, the rotating speed of the motor is different at different frequencies of the frequency converter, and the rotating speed of the motor affects the adjustment of the flow of the second pipeline 132 by the pump 190. The frequency controller 170 is used to control the frequency of the frequency converter according to the temperature tested by the temperature sensor 110, so that the adjustment accuracy of the frequency of the frequency converter is improved. The frequency of the frequency converter is adjusted to realize accurate control of the rotating speed of the motor, and then the adjustment accuracy of the flow of the second pipeline 132 is improved. The flow of the second pipeline 132 affects the heat dissipation capacity of the cooling tower 100 to the fluid in the first pipeline 131. When the temperature of the second connection pipeline group increases, the frequency controller 170 controls the frequency of the frequency converter to increase, and then the rotating speed of the motor increases, so that the cooling capacity of the cooling tower 100 to the fluid in the first pipeline 131 is improved. When the temperature of the second connection pipeline group decreases, the frequency controller 170 controls the frequency of the frequency converter to decrease, and then the rotating speed of the motor decreases, so that the cooling capacity of the cooling tower 100 to the fluid in the first pipeline 131 is weakened. The adjustment of the heat of the cooling tower 100 to the first connection pipeline group can stabilize the temperature of the second connection pipeline group, so that the temperature of the fluid provided by the second connection pipeline group to the heating unit 181 is relatively stable.

[0035] The fluid in the first pipeline 131 enters the cooling tower 100 to dissipate heat, and the fluid in the cooling tower 100 exchanges heat with air, so that the temperature of the second pipeline 132 is less than the temperature of the first pipeline 131.

[0036] Reference Figure 2 The frequency controller 170 comprises a reference frequency setting unit, a reference temperature setting unit, a temperature comparator and a frequency compensation unit, the reference frequency setting unit is used to set a reference frequency, the reference temperature setting unit is used to set a reference temperature, the temperature comparator is used to obtain a temperature difference between the temperature tested by the temperature sensor 110 and the reference temperature, and the frequency compensation unit is used to set the frequency of the frequency converter according to the reference frequency and the temperature difference.

[0037] When the temperature difference between the temperature tested by the temperature sensor 110 and the reference temperature is greater than zero, the frequency of the frequency converter is greater than the reference frequency; when the temperature difference between the temperature tested by the temperature sensor 110 and the reference temperature is less than zero, the frequency of the frequency converter is less than the reference frequency.

[0038] Reference Figure 1 The heat recovery chiller 120 further comprises a heat recovery condenser and a refrigerant pipe 123, and the heat in the refrigerant pipe 123 is released into the first heat medium pipe 121 and the second heat medium pipe 122 through the heat recovery condenser.

[0039] The temperature fluctuation of the first connection pipe group is small, and the temperature fluctuation of the second connection pipe group is small, so that the pressure fluctuation of the heat recovery condenser is small, and the shutdown risk of the heat recovery chiller 120 is reduced.

[0040] The heat recovery condenser is a device for recovering refrigeration. The main function of the heat recovery condenser is to effectively transfer the heat released in the refrigerant pipe 123 during the condensation process to the first heat medium pipe 121 and the second heat medium pipe 122, thereby realizing the recovery and utilization of heat energy. By recovering and utilizing the heat released during condensation, the heat recovery condenser can significantly improve the energy efficiency of the system, reduce energy consumption, and reduce the impact on the environment.

[0041] Reference Figure 1 The heating unit 181 comprises a heating pipe. The second connection pipe group comprises a third pipe 141 and a fourth pipe 142, the third pipe 141 connects the inlet of the heating pipe and one end of the second heat medium pipe 122, and the fourth pipe 142 connects the outlet of the heating pipe and the other end of the second heat medium pipe 122. The temperature sensor 110 is used to test the temperature of the third pipe 141.

[0042] The cooling air conditioner 180 needs to be preheated before refrigeration when the ambient temperature is low. The preheating function of the cooling air conditioner 180 is realized by the heating unit 181. For example, in winter, the ambient temperature is low, and the cooling air conditioner 180 needs to be preheated before refrigeration.

[0043] When the cooling air conditioner 180 performs the dehumidification function, the temperature of the cooling air conditioner 180 itself is low, and the preheating of the cooling air conditioner 180 needs to be realized by the heating unit 181, and then the cooling air conditioner 180 is placed into the clean room.

[0044] Reference Figure 1The energy recovery system further comprises a first automatic valve 161 located in the first pipeline 131. The first automatic valve 161 is used to adjust the flow of the first pipeline 131 according to the temperature tested by the temperature sensor 110. That is, the opening degree of the first automatic valve 161 is adjusted according to the temperature tested by the temperature sensor 110, so as to adjust the flow of the first pipeline 131. When the temperature tested by the temperature sensor 110 increases, the flow of the first pipeline 131 is adjusted to increase; when the temperature tested by the temperature sensor 110 decreases, the flow of the first pipeline 131 is adjusted to decrease.

[0045] The opening degree of the first automatic valve 161 can be adjusted according to the ambient temperature of the energy recovery system. For example, when the ambient temperature of the energy recovery system is high, such as in summer, the opening degree of the first automatic valve 161 can be appropriately increased, so as to adjust the flow of the first pipeline 131 to increase, and the heat dissipation capacity of the fluid in the first pipeline 131 is increased. When the ambient temperature of the energy recovery system is low, such as in winter, the opening degree of the first automatic valve 161 can be appropriately decreased, so as to adjust the flow of the first pipeline 131 to decrease, and the heat dissipation capacity of the fluid in the first pipeline 131 is decreased.

[0046] In the embodiment, the adjustment precision of the first automatic valve 161 on the flow of the first pipeline 131 is less than the adjustment precision of the pump 190 on the flow of the second pipeline 132.

[0047] Reference Figure 1 The energy recovery system further comprises a connecting pipeline 133, one end of the connecting pipeline 133 is connected to the first pipeline 131, and the other end of the connecting pipeline 133 is connected to the second pipeline 132; a second automatic valve 162 located in the connecting pipeline 133; wherein the pump 190 is located between the connecting pipeline 133 and the second pipeline 132 and between the first heat medium pipe 121.

[0048] The second automatic valve 162 is used to adjust the flow of the connecting pipeline 133 according to the temperature tested by the temperature sensor 110.

[0049] When the first automatic valve 161 is damaged in the working process, for example, the first automatic valve 161 cannot be switched from the closed state to the open state, the second automatic valve 162 can be opened to form a circulating loop of the first pipeline 131, the connecting pipeline 133, the second pipeline 132 and the first heat medium pipe 121, so as to avoid the damage of the pump 190 due to excessive pressure.

[0050] In the embodiment, the adjustment precision of the second automatic valve 162 on the flow of the connecting pipeline 133 is less than the adjustment precision of the pump 190 on the flow of the second pipeline 132.

[0051] With reference to Figure 1 The cooling air conditioner 180 comprises a cooling unit 182, and the cooling unit 182 comprises a cooling pipeline; wherein the energy recovery system further comprises a third connecting pipeline group connecting the refrigerant pipeline 123 and the cooling pipeline.

[0052] With reference to Figure 1 The third connecting pipeline group comprises a fifth pipeline 151 and a sixth pipeline 152, the fifth pipeline 151 connects one end of the refrigerant pipeline 123 and an inlet of the cooling pipeline, and the sixth pipeline 152 connects the other end of the refrigerant pipeline 123 and an outlet of the cooling pipeline.

[0053] In the embodiment, the pump 190 can be a water pump, which is a machine that delivers or pressurizes a fluid. The pump 190 transmits mechanical energy of the motor to the fluid, so that the fluid energy is increased. The fluid includes water.

[0054] In the embodiment, the pump 190 further comprises a fluid driving member, and the rotating speed of the motor controls the mechanical energy of the fluid driving member. The fluid driving member can be a vane, for example.

[0055] Obviously, the above embodiment is only an example for clearly illustrating, but not a limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An energy recovery system, characterized by, The energy recovery system comprises: a cooling tower; a heat recovery chiller comprising a first heat medium pipe and a second heat medium pipe; a cooling air conditioner, the cooling air conditioner comprising a heating unit; a first connecting pipe group comprising a first pipe and a second pipe, the first pipe connecting one end of the first heat medium pipe and an inlet of the cooling tower, and the second pipe connecting the other end of the first heat medium pipe and an outlet of the cooling tower; a second connecting pipe group connecting the second heat medium pipe and the heating unit; a temperature sensor for testing the temperature of the second connecting pipe group; a pump located in the second pipe, the pump comprising a motor and a frequency converter, the frequency converter being used to adjust the rotating speed of the motor; a frequency controller for controlling the frequency of the frequency converter according to the temperature tested by the temperature sensor.

2. The energy recovery system of claim 1, wherein, The frequency controller comprises a reference frequency setting unit, a reference temperature setting unit, a temperature comparator and a frequency compensation unit, the reference frequency setting unit being used to set a reference frequency, the reference temperature setting unit being used to set a reference temperature, the temperature comparator being used to obtain the temperature difference between the temperature tested by the temperature sensor and the reference temperature, and the frequency compensation unit being used to set the frequency of the frequency converter according to the reference frequency and the temperature difference.

3. The energy recovery system of claim 1, wherein, The heat recovery chiller further comprises a heat recovery condenser and a refrigerant pipe, and the heat in the refrigerant pipe is released into the first heat medium pipe and the second heat medium pipe through the heat recovery condenser.

4. The energy recovery system of claim 1, wherein, The heating unit comprises a heating pipe; the second connecting pipe group comprises a third pipe and a fourth pipe, the third pipe connecting an inlet of the heating pipe and one end of the second heat medium pipe, and the fourth pipe connecting an outlet of the heating pipe and the other end of the second heat medium pipe; wherein the temperature sensor is used to test the temperature of the third pipe.

5. The energy recovery system of claim 1, wherein, Further comprising: a first automatic valve located in the first pipe.

6. The energy recovery system of claim 5, wherein, The first automatic valve is used to adjust the flow of the first pipe according to the temperature tested by the temperature sensor.

7. The energy recovery system of claim 1, wherein, Further comprising: a connecting pipe, one end of the connecting pipe being connected to the first pipe, and the other end of the connecting pipe being connected to the second pipe; a second automatic valve located in the connecting pipe; wherein the pump is located between the connection of the connecting pipe and the second pipe and the first heat medium pipe.

8. The energy recovery system of claim 7, wherein, The second automatic valve is used to adjust the flow of the connecting pipe according to the temperature tested by the temperature sensor.

9. The energy recovery system of claim 3, wherein, The cooling air conditioner comprises a cooling unit, and the cooling unit comprises a cooling pipe; wherein the energy recovery system further comprises a third connecting pipe group connecting the refrigerant pipe and the cooling pipe.

10. The energy recovery system of claim 9, wherein, The third connecting pipe group comprises a fifth pipe and a sixth pipe, the fifth pipe connecting one end of the refrigerant pipe and an inlet of the cooling pipe, and the sixth pipe connecting the other end of the refrigerant pipe and an outlet of the cooling pipe.

11. The energy recovery system of claim 5 or 6, wherein, The adjustment accuracy of the first automatic valve on the flow of the first pipe is less than the adjustment accuracy of the pump on the flow of the second pipe.

12. The energy recovery system of claim 7 or 8, wherein, The adjustment accuracy of the second automatic valve on the flow of the connecting pipe is less than the adjustment accuracy of the pump on the flow of the second pipe.

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