Evaporator refrigerant control system and adsorption refrigeration device

Abstract

This invention discloses an evaporator refrigerant control system, comprising: an evaporator having an evaporation chamber and a refrigeration fluid channel capable of exchanging heat with the liquid refrigerant in the evaporation chamber; a receiver for storing liquid refrigerant; a control valve and a pump, one of which can introduce liquid refrigerant from the receiver into the evaporation chamber, and the other can introduce liquid refrigerant from the evaporation chamber into the receiver. By configuring the receiver, control valve, and pump, the liquid level of the liquid refrigerant in the evaporation chamber can be better controlled, ensuring that the evaporation chamber is always in a better evaporation state. This is especially beneficial when the gaseous adsorbent discharge efficiency in the evaporation chamber is low, resulting in better evaporation performance. In summary, this evaporator refrigerant control system effectively solves the problem of uncontrollable evaporation performance in current evaporators. This invention also discloses an adsorption refrigeration device.

Description

Technical Field

[0001] This invention relates to the field of refrigeration, and more specifically, to an evaporator refrigerant control system, and also to an adsorption refrigeration device including the above-mentioned evaporator refrigerant control system. Background Technology

[0002] Currently, data center air conditioning units primarily rely on the traditional method of converting electrical energy into mechanical energy for cooling. This fails to fully utilize the high power consumption and heat generated by data centers, as well as the inexhaustible natural cooling sources. This waste heat recovery cooling solution can fully utilize the heat of the data center, eliminating the need for compressors while still providing the required cooling capacity. Evaporators are frequently used in data center temperature control technology; these can be evaporators from compression refrigeration systems, absorption refrigeration systems, or adsorption refrigeration systems.

[0003] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems: the current evaporator has the problem of uncontrollable evaporation effect. Summary of the Invention

[0004] In view of this, the first objective of the present invention is to provide an evaporator refrigerant control system that can effectively solve the problem of uncontrollable evaporation effect in current evaporators. The second objective of the present invention is to provide an adsorption refrigeration device including the above-mentioned evaporator refrigerant control system.

[0005] To achieve the first objective mentioned above, the present invention provides the following technical solution:

[0006] An evaporator refrigerant control system, comprising:

[0007] An evaporator having an evaporation chamber and a refrigeration fluid passage capable of exchanging heat with the liquid refrigerant within the evaporation chamber;

[0008] A liquid receiver is used to store liquid refrigerant.

[0009] The system includes a control valve and a pump, one of which can introduce liquid refrigerant from the receiver into the evaporator, and the other can introduce liquid refrigerant from the evaporator into the receiver.

[0010] In the aforementioned evaporator refrigerant control system, if the liquid level in the evaporator is too low, either a control valve or a pump can be used to allow liquid refrigerant in the receiver to flow into the evaporator chamber, replenishing it and ensuring sufficient liquid refrigerant for evaporation, thus guaranteeing efficient heat exchange. Conversely, if the liquid refrigerant level in the evaporator chamber is too high, it will affect the difficulty and height of bubble rise at the bottom, significantly impacting evaporation efficiency. Therefore, the pump can be activated to extract a portion of the liquid refrigerant from the evaporator chamber back into the receiver. By using the receiver, control valve, and pump, the liquid refrigerant level in the evaporator chamber can be better controlled, ensuring the evaporator chamber is always in a better evaporation state. This is especially beneficial when the gaseous adsorbent discharge efficiency in the evaporator chamber is low, resulting in better evaporation performance. In conclusion, this evaporator refrigerant control system effectively solves the problem of uncontrollable evaporation performance in current evaporators.

[0011] In some technical solutions, the fluid interface of the liquid receiver is connected to the evaporation chamber via a control valve, so that liquid refrigerant can be added to the evaporation chamber when the control valve is in the liquid replenishment state; when the pump is turned on, it can pump the liquid refrigerant in the evaporation chamber to the liquid receiver.

[0012] In some technical solutions, a controller is also included. When the liquid refrigerant level in the evaporation chamber is lower than a first preset value, the controller can control the control valve to switch to the liquid replenishment state to achieve liquid replenishment. When the liquid refrigerant level in the evaporation chamber is higher than a second preset value, the controller can control the pump to start to achieve liquid extraction.

[0013] Some technical solutions also include a level gauge for detecting the liquid refrigerant level in the evaporation chamber.

[0014] In some technical solutions, a detector is also included to monitor whether the evaporation chamber is overheated, and the controller can control the control valve to switch to the liquid replenishment state when the evaporation chamber is overheated.

[0015] In some technical solutions, an expansion valve is provided between the outlet of the liquid reservoir and the evaporation chamber, so that the fluid flowing out of the outlet of the liquid reservoir can flow into the evaporation chamber after being throttled by the expansion valve.

[0016] In some technical solutions, the control valve's replenishment state includes a first replenishment state and a second replenishment state. When the control valve is in the first replenishment state, the fluid interface of the liquid reservoir bypasses the pump and connects to the inlet of the expansion valve. When the control valve is in the second replenishment state, the inlet of the pump connects to the fluid interface of the liquid reservoir, and the outlet connects to the inlet of the expansion valve, so that the pump can pressurize and supply the liquid in the liquid reservoir to the expansion valve. The control valve's operating state also includes a pumping state. When the control valve is in the pumping state, the inlet of the pump connects to the evaporation chamber, and the outlet connects to the chamber of the liquid reservoir, so that the pump can pump the liquid refrigerant in the evaporation chamber to the liquid storage chamber of the liquid reservoir.

[0017] In some technical solutions, the control valve includes a first switching valve, a second switching valve, and a third switching valve, the outlet of the pump is connected to the inlet of the expansion valve, and the outlet of the expansion valve is connected to the evaporation chamber;

[0018] One end of the first switching valve is connected to the fluid interface of the reservoir, and the other end is connected between the outlet of the pump and the inlet of the expansion valve.

[0019] One end of the second switching valve is connected to the fluid interface of the reservoir, and the other end is connected to the inlet of the pump.

[0020] One end of the third switching valve is connected to the inlet of the pump, and the other end is connected to the evaporation chamber so that liquid refrigerant can be obtained from the evaporation chamber.

[0021] In some technical solutions, the liquid reservoir is provided with a replenishment port and a return port, and the return port is used to connect to the condenser.

[0022] To achieve the second objective mentioned above, the present invention also provides an adsorption refrigeration device, which includes any of the aforementioned evaporator refrigerant control systems, comprising an adsorption bed, wherein the adsorption chamber of the adsorption bed is provided with an adsorbent to exchange heat with a heat exchange channel, and the evaporation chamber of the evaporator refrigerant control system is used to communicate with the adsorption chamber in the adsorption state. Since the aforementioned evaporator refrigerant control system has the above-mentioned technical effects, the adsorption refrigeration device having this evaporator refrigerant control system should also have corresponding technical effects.

[0023] In some technical solutions, a condenser is also included; the evaporation chamber of the evaporator is optionally connected to the adsorption chambers corresponding to different adsorptions in the plurality of adsorption beds via a first valve group; the evaporator is also provided with a refrigeration fluid channel for heat exchange with the liquid refrigerant in the evaporation chamber, the inlet end of the refrigeration fluid channel is connected to a refrigeration fluid return port, and the outlet end is connected to a refrigeration fluid outlet; the condensation chamber of the condenser is optionally connected to the adsorption chambers corresponding to different adsorption beds in the plurality of adsorption beds via a second valve group; the condenser is also provided with a cooling fluid channel for heat exchange with the gaseous refrigerant in the condensation chamber, the inlet of the cooling fluid channel is connected to a cooling fluid inlet port, and the inlet of the cooling fluid channel is connected to a cooling fluid outlet port; one end of each heat exchange channel is optionally connected to the heat source fluid inlet port via a first multi-way valve, and the other end of each heat exchange channel is optionally connected to the heat source fluid outlet port via a second multi-way valve; one end of each heat exchange channel is optionally connected to the cooling fluid inlet port via a third multi-way valve, and the other end of each heat exchange channel is optionally connected to the cooling fluid outlet port via a fourth multi-way valve. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of an evaporator refrigerant control system provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of another evaporator refrigerant control system provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the adsorption refrigeration device provided in an embodiment of the present invention.

[0028] The following labels are shown in the attached diagram:

[0029] Heat source fluid inlet 1, heat source fluid outlet 2, cooling fluid inlet 3, cooling fluid outlet 4, chilled fluid return outlet 5, chilled fluid outlet 6, adsorption bed 7, evaporator 8, condenser 9, first valve group 10, second valve group 11, first multi-way valve 12, second multi-way valve 13, third multi-way valve 14, fourth multi-way valve 15, heat exchange channel 16, chilled fluid channel 17, cooling fluid channel 18, control valve 19, expansion valve 20, pump 21, level gauge 22, evaporation chamber 23, liquid receiver 24, replenishment port 25, return port 26;

[0030] First switching valve 191, second switching valve 192, third switching valve 193. Detailed Implementation

[0031] This invention discloses an evaporator refrigerant control system, which can effectively solve the problem of uncontrollable evaporation effect in current evaporators.

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-3 , Figure 1 A schematic diagram of the structure of an evaporator refrigerant control system provided in an embodiment of the present invention; Figure 2 A schematic diagram of another evaporator refrigerant control system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the adsorption refrigeration device provided in an embodiment of the present invention.

[0034] In some embodiments, this embodiment provides an evaporator refrigerant control system, mainly including an evaporator 8, a liquid receiver 24, and a condenser pump. The liquid receiver 24 and the condenser pump can control the liquid level of the liquid refrigerant in the evaporation chamber 23 of the evaporator 8, thereby regulating the refrigerant in the evaporation chamber 23 to obtain a better evaporation heat absorption state. The evaporator 8 can be an evaporator 8 in a compression refrigeration system, an evaporator 8 in an absorption refrigeration system, an evaporator 8 in an adsorption refrigeration system, or an evaporator 8 in other refrigeration systems. Of course, the evaporator 8 can also be used in non-refrigeration systems.

[0035] The evaporator 8 has an evaporation chamber 23 and a cryogenic fluid channel 17 that exchanges heat with the liquid refrigerant in the evaporation chamber 23. The liquid refrigerant absorbs heat from the fluid in the cryogenic fluid channel 17 and then evaporates, primarily through boiling evaporation. The outer wall of the cryogenic fluid channel 17 contains liquid refrigerant. After absorbing heat, the liquid refrigerant evaporates to form a gaseous refrigerant, which carries away the heat, resulting in a lower outlet temperature than inlet temperature for preparing cryogenic fluid. The evaporator 8 typically includes cryogenic fluid heat exchange tubes through which cryogenic fluid flows. These tubes are submerged in the liquid refrigerant within the evaporation chamber 23. Alternatively, the evaporator 8 can have refrigerant heat exchange tubes, with the tube cavity forming the evaporation chamber 23. The refrigerant heat exchange tubes and the cryogenic fluid heat exchange tubes are in contact with each other for heat exchange. Further details regarding the arrangement of the evaporation chamber 23 and the cryogenic fluid channel 17 can be found in existing technologies.

[0036] Of the control valve 19 and the pump 21, one can introduce liquid refrigerant from the receiver 24 into the evaporator 23, and the other can draw liquid refrigerant from the evaporator 23 into the receiver 24. This can be categorized into at least two cases.

[0037] In the first scenario, if the liquid refrigerant level in the receiver 24 is relatively lower than that in the evaporator 8, then when the pump 21 is turned on, the liquid refrigerant in the receiver 24 can overcome gravity and be introduced into the evaporator 23. A valve port in the control valve 19 is connected between the evaporator 23 and the receiver 24, so that when the valve port is opened, the liquid refrigerant in the evaporator 8 evaporator 23 can flow into the receiver 24 under the action of gravity.

[0038] In the second scenario, if the liquid refrigerant level in the receiver 24 is higher than that in the evaporator 8, then when the pump 21 is turned on, the liquid refrigerant in the evaporator 8 can overcome gravity and be introduced into the receiver 24. A valve port in the control valve 19 connects the evaporator chamber 23 and the receiver 24, allowing the liquid refrigerant in the receiver 24 to flow into the evaporator chamber 23 of the evaporator 8 under gravity when the valve port is open. That is, the outlet of the receiver 24 is connected to the evaporator chamber 23 via the control valve 19, allowing liquid refrigerant to be added to the evaporator chamber 23 when the control valve 19 is in a replenishing state; and when the pump 21 is turned on, it can pump the liquid refrigerant from the evaporator chamber 23 into the receiver 24.

[0039] The form of the control valve 19 is not required. A simple control valve 19 can be equipped with a switching valve to connect the outlet of the liquid reservoir 24 and the inlet of the evaporation chamber 23. Of course, it can also be other valve devices, such as a reversing valve.

[0040] The pump 21 is a liquid pump that, when activated, pressurizes and draws the inlet liquid refrigerant to the outlet, thereby enabling the pumping of liquid refrigerant with lower gravitational potential energy to a position with higher gravitational potential energy, thus obtaining liquid refrigerant with higher gravitational potential energy. Of course, under the control of the control valve 19, if the gravitational potential energy difference is small, or if a reverse situation occurs, the pump 21 or other liquid pumps can be used to further guide the liquid flow.

[0041] In the aforementioned evaporator refrigerant control system, if the liquid level in the evaporator 8 is too low during operation, either the control valve 19 or the pump 21 can be used to allow the liquid refrigerant in the receiver 24 to flow into the evaporator chamber 23, replenishing it with sufficient liquid refrigerant to ensure adequate evaporation and thus maintain the evaporative heat exchange effect. Conversely, if the liquid refrigerant level in the evaporator chamber 23 is too high, it will affect the difficulty and height of the bubbles rising from the bottom, significantly impacting evaporation efficiency. Therefore, the pump 21 can be activated to extract a portion of the liquid refrigerant from the evaporator chamber 23 back into the receiver 24. By using the receiver 24, control valve 19, and pump 21, the liquid refrigerant level in the evaporator chamber 23 can be better controlled, ensuring that the evaporator chamber 23 is always in a better evaporation state. This is especially beneficial when the gaseous adsorbent discharge efficiency in the evaporator chamber 23 is low, resulting in better evaporation performance for the evaporator 8. In summary, this evaporator refrigerant control system can effectively solve the problem of uncontrollable evaporation effect in the current evaporator 8.

[0042] In some embodiments, for convenient automatic control, a controller can be further provided. When the liquid refrigerant volume in the evaporator chamber 23 is lower than a first preset value, the controller can control the control valve 19 to switch to a liquid replenishment state to replenish the liquid and raise the liquid refrigerant level. Furthermore, when the liquid refrigerant volume in the evaporator chamber 23 is higher than a second preset value, the controller can control the pump 21 to start to pump liquid and lower the liquid refrigerant level in the evaporator chamber 23. This ensures that the liquid refrigerant level in the evaporator chamber 23 is always between the first and second preset values. The smaller the difference between the first and second preset values, the better the evaporation effect; however, if the difference is too small, it will cause the pump 21 and control valve 19 to start frequently, resulting in higher energy consumption. Conversely, the larger the difference between the first and second preset values, the worse the evaporation effect, but it can reduce the frequency of starting the pump 21 and control valve 19. Specifically, the appropriate range can be selected according to the actual situation. Generally, when the liquid level is at the first preset value, it is slightly higher than the uppermost end of the refrigerant fluid channel 17.

[0043] In some embodiments, a level gauge 22 may be further included for detecting the liquid refrigerant level in the evaporation chamber 23, so that the liquid level in the evaporation chamber 23 can be directly reflected by the level gauge 22.

[0044] In some embodiments, the system may further include a detector for monitoring whether the evaporator chamber 23 is overheated. The controller can control the control valve 19 to switch to a liquid replenishment state when the evaporator chamber 23 is overheated. The liquid level of the liquid refrigerant in the evaporator chamber 23 can be determined by checking whether it is overheated. Whether the evaporator chamber 23 is overheated can be determined by the temperature difference between the inlet and outlet of the refrigerant fluid; generally, the smaller the temperature difference, the more likely the evaporator chamber 23 is to be overheated. Alternatively, the pressure in the evaporator chamber 23 can also be used for determination.

[0045] In some embodiments, considering that the liquid receiver 24 is mainly connected to the condenser 9, its internal pressure is generally higher than that of the evaporator 23. Therefore, an expansion valve 20 can be installed between the outlet of the liquid receiver 24 and the evaporator 23, allowing the fluid flowing out of the outlet of the liquid receiver 24 to flow into the evaporator 23 after being throttled by the expansion valve 20. That is, in application, when liquid replenishment is required, the liquid refrigerant flowing out of the liquid receiver 24 will first pass through the expansion valve 20. Under the action of the pressure difference, it will pass through the expansion valve 20, expand and cool down at the expansion valve 20, and then flow into the evaporator 23, thereby lowering the temperature of the liquid refrigerant entering the evaporator 23.

[0046] In some embodiments, considering that a larger pressure differential for the expansion valve 20 results in a larger inlet and outlet temperature difference, the evaporator chamber 23 may be too hot in some applications, leading to poor cooling performance. Therefore, the liquid refrigerant entering the expansion valve 20 can be pressurized before flowing into the valve for throttling and expansion, thus achieving better cooling.

[0047] Specifically, the control valve 19 can be configured to have two replenishment states: a first replenishment state and a second replenishment state. When the control valve 19 is in the first replenishment state, the fluid interface of the receiver 24 can bypass the pump 21 and connect to the inlet of the expansion valve 20. That is, the fluid in the receiver 24 can flow out through the fluid interface and flow to the inlet of the expansion valve 20 without passing through the pump 21. If it flows directly to the inlet of the expansion valve 20 through the channel, under the action of pressure difference, the liquid refrigerant enters the expansion valve 20 from the inlet and then flows out from the outlet of the expansion valve 20 into the evaporator chamber 23.

[0048] When the control valve 19 is in the second replenishment state, the inlet of the pump 21 is connected to the fluid interface of the receiver 24, and the outlet is connected to the inlet of the expansion valve 20. This allows the pump 21 to pressurize the liquid in the receiver 24 and supply it to the expansion valve 20. In other words, when the control valve 19 is in the second replenishment state, the liquid in the receiver 24 no longer bypasses the pump 21, but instead passes through it. When the pump 21 is activated, the incoming liquid refrigerant is pressurized and output, resulting in a larger pressure difference between the inlet and outlet of the expansion valve 20, which in turn lowers the temperature of the liquid refrigerant at the outlet of the expansion valve 20.

[0049] Correspondingly, the operating states of control valve 19 also include a liquid extraction state. When control valve 19 is in the liquid extraction state, the inlet of pump 21 is connected to the evaporator 23, and the outlet is connected to the chamber of the liquid receiver 24, so that pump 21 can pump the liquid refrigerant in the evaporator 23 to the liquid receiver chamber. That is, the connection relationship of pump 21 in the liquid extraction state and the second liquid replenishment state of control valve 19 is opposite, and the liquid extraction state avoids the expansion valve 20 to avoid the influence of the expansion valve 20. The above pressurization can be achieved by using pump 21, which takes advantage of the asynchronous nature of liquid replenishment and liquid extraction in the evaporator 23, allowing pump 21 to be used interchangeably.

[0050] The control valve 19 can be a valve group, which includes multiple individual valves; the control valve 19 can also be a directional valve.

[0051] In some embodiments, for ease of installation, the control valve 19 preferably includes a first switching valve 191, a second switching valve 192, and a third switching valve 193. The outlet of the pump 21 is connected to the inlet of the expansion valve 20, and the outlet of the expansion valve 20 is connected to the evaporator chamber 23. One end of the first switching valve 191 is connected to the fluid interface of the liquid receiver 24, and the other end is connected between the outlet of the pump 21 and the inlet of the expansion valve 20; one end of the second switching valve 192 is connected to the fluid interface of the liquid receiver 24, and the other end is connected to the inlet of the pump 21; one end of the third switching valve 193 is connected to the inlet of the pump 21, and the other end is connected to the evaporator chamber 23 to obtain liquid refrigerant from the evaporator chamber 23.

[0052] When the control valve 19 is in the first liquid replenishment state, the first switch valve 191 is open, and the second switch valve 192 and the third switch valve 193 are closed. At this time, the liquid refrigerant in the liquid receiver 24 can flow through the first switch valve 191 to the inlet of the expansion valve 20, and then flow through the expansion valve 20 to the evaporation chamber 23 for atmospheric pressure liquid replenishment.

[0053] When control valve 19 is in the second liquid replenishment state, the second switch valve 192 is opened, and the first switch valve 191 and the third switch valve 193 are closed. At this time, the liquid refrigerant in the liquid receiver 24 enters the inlet of the pump 21 through the second switch valve 192, and then is pressurized by the pump 21 and delivered to the inlet of the expansion valve 20, and then flows into the evaporator chamber 23 through the expansion valve 20 for pressurization and liquid replenishment.

[0054] When control valve 19 is in the liquid extraction state, the second switch valve 192 and expansion valve 20 are both closed, and the first switch valve 191 and third switch valve 193 are open. At this time, under the pumping pressure of pump 21, the liquid refrigerant in evaporation chamber 23 enters the inlet end of pump 21 through the third switch valve 193, and then flows from the outlet end of pump 21 to the first switch valve 191 under the pumping pressure of pump 21, and then flows into liquid receiver 24 through the first switch valve 191.

[0055] In some embodiments, the receiver 24 may be equipped with a replenishment port 25 for adding liquid refrigerant. This allows liquid refrigerant to be added to the receiver 24 when the refrigerant content in the circulation system is insufficient. Compared to directly adding liquid refrigerant to the evaporator 8 and condenser 9, this avoids the impact of liquid replenishment on the system. Specifically, the replenishment port 25 may be equipped with a diaphragm valve. Generally, the receiver 24 also has a return port 26, which connects to the condenser 9 to introduce liquid refrigerant into the condenser 9.

[0056] Based on the evaporator refrigerant control system provided in the above embodiments, the present invention also provides an adsorption refrigeration device. This adsorption refrigeration device includes any one of the evaporator refrigerant control systems described in the above embodiments, comprising an adsorption bed 7. The adsorption chamber of the adsorption bed 7 is provided with an adsorbent to exchange heat with the heat exchange channel 16. The evaporation chamber 23 of the evaporator refrigerant control system is used to communicate with the adsorption chamber in the adsorption state. Since this adsorption refrigeration device uses the evaporator refrigerant control system described in the above embodiments, the beneficial effects of this adsorption refrigeration device are explained in the above embodiments.

[0057] In some embodiments, the adsorption refrigeration device preferably further includes a condenser 9.

[0058] The adsorption bed 7 includes an adsorption chamber containing adsorbent and a heat exchange channel 16 for exchanging heat with the adsorbent in the adsorption chamber. When heat source fluid is introduced into the heat exchange channel 16 through the heat source fluid inlet 1, the adsorbent begins to desorb gaseous refrigerant. The desorbed gaseous refrigerant enters the condenser 9, while the heat source fluid, after releasing heat in the adsorption bed 7, flows out from the heat source fluid outlet 2. When cooling fluid is introduced through the cooling fluid inlet 3, the adsorbent cools down to begin adsorbing the refrigerant, and then forms a suction force on the gaseous refrigerant in the evaporator 8, causing the evaporator 8 to continue evaporating to form gaseous refrigerant, thereby carrying away heat; while the cooling fluid, after absorbing heat in the heat exchange channel 16, flows out from the cooling fluid outlet 4.

[0059] The evaporation chamber 23 of the evaporator 8 is optionally connected to the adsorption chambers corresponding to different adsorption processes in the multiple adsorption beds 7 via the first valve group 10. This allows the adsorption chambers of some adsorption beds 7 to be connected to the evaporation chamber 23 during the adsorption phase, while disconnecting from the condensation chamber. The evaporator 8 also includes a refrigerant channel 17 for heat exchange with the liquid refrigerant in the evaporation chamber 23. The inlet of the refrigerant channel 17 is connected to a refrigerant return port 5, and the outlet is connected to a refrigerant outlet port 6. This allows the liquid refrigerant remaining in the evaporation chamber 23 to continue evaporating after the gaseous refrigerant is drawn away from the adsorption chamber during the adsorption phase. During evaporation, the refrigerant absorbs heat, resulting in the temperature of the refrigerant outlet port 5 being lower than that of the refrigerant inlet port.

[0060] The condenser 9's condensing chamber is optionally connected to the adsorption chambers of different adsorption beds 7 through a second valve group 11. This allows the adsorption chamber of a portion of the adsorption beds 7 to be connected to the condensing chamber while disconnected from the evaporation chamber 23 during the desorption phase. The condenser 9 also includes a cooling fluid channel 18 for heat exchange with the gaseous refrigerant in the condensing chamber. The inlet of the cooling fluid channel 18 is connected to the cooling fluid inlet 3, and the inlet of the cooling fluid channel 18 is connected to the cooling fluid outlet 4. This allows the condensing chamber to receive the gaseous refrigerant as it exits the adsorption chamber during the desorption phase, transferring heat to the cooling fluid in the cooling fluid channel 18, thus raising the temperature of the cooling fluid entering the cooling fluid channel 18 before it exits from the outlet. The condensed liquid refrigerant in the condensing chamber can be transferred to the liquid receiver 24. The cooling fluid channel 18 and the heat exchange channel 16 through which the cooling fluid flows can be connected in series or in parallel between the cooling fluid inlet 3 and the cooling fluid outlet 4.

[0061] Each of the heat exchange channels 16 has one end optionally connected to the heat source fluid inlet 1 via a first multi-way valve 12, and the other end optionally connected to the heat source fluid outlet 2 via a second multi-way valve 13. This allows heat source fluid from the heat source fluid inlet 1 to be introduced through the first multi-way valve 12 when the corresponding adsorption bed 7 enters the desorption stage, and the heat source fluid, after releasing heat, is discharged from the heat source fluid outlet 2 through the second multi-way valve 13.

[0062] Each heat exchange channel 16 has one end optionally connected to the cooling fluid inlet 3 via a third multi-way valve 14, and the other end optionally connected to the cooling fluid outlet 4 via a fourth multi-way valve 15. This allows cooling fluid to be introduced from the cooling fluid inlet 3 through the third multi-way valve 14 when the corresponding adsorption bed 7 enters the adsorption stage, and then discharged from the cooling fluid outlet 4 through the fourth multi-way valve 15 after the cooling fluid releases heat.

[0063] In some embodiments, the connection method between the condenser 9, adsorption bed 7, and evaporator 8 in the adsorption refrigeration device can refer to current regenerative cycles, thermal wave cycles, and multi-stage cycles. The adsorption refrigeration device may have one or more adsorption beds 7. As shown in the attached figure, two adsorption beds 7 can be provided to alternately perform desorption and adsorption.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0065] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An evaporator refrigerant control system, characterized in that, include: Evaporator (8) has an evaporation chamber (23) and a refrigeration fluid passage (17) capable of exchanging heat with the liquid refrigerant in the evaporation chamber (23). Receiver (24) is used to store liquid refrigerant; The control valve (19) and the pump (21) are respectively capable of introducing liquid refrigerant from the receiver (24) into the evaporator (23) and the pump (21) can introduce liquid refrigerant from the evaporator (23) into the receiver (24).

2. The evaporator refrigerant control system according to claim 1, characterized in that, The fluid interface of the liquid receiver (24) is connected to the evaporation chamber (23) through the control valve (19) so that liquid refrigerant can be added to the evaporation chamber (23) when the control valve (19) is in the liquid replenishment state; when the pump (21) is turned on, it can pump the liquid refrigerant in the evaporation chamber (23) to the liquid receiver (24).

3. The evaporator refrigerant control system according to claim 2, characterized in that, It also includes a controller, which can control the control valve (19) to switch to the liquid replenishment state to achieve liquid replenishment when the liquid refrigerant level in the evaporation chamber (23) is lower than the first preset value; and can control the pump (21) to start to achieve liquid extraction when the liquid refrigerant level in the evaporation chamber (23) is higher than the second preset value.

4. The evaporator refrigerant control system according to claim 3, characterized in that, It also includes a level gauge (22) for detecting the liquid refrigerant level in the evaporation chamber (23).

5. The evaporator refrigerant control system according to claim 3, characterized in that, It also includes a detector for monitoring whether the evaporation chamber (23) is overheated, and the controller can control the control valve (19) to switch to the liquid replenishment state when the evaporation chamber (23) is overheated.

6. The evaporator refrigerant control system according to any one of claims 1-5, characterized in that, An expansion valve (20) is provided between the outlet of the liquid reservoir (24) and the evaporation chamber (23) so that the fluid flowing out of the outlet of the liquid reservoir (24) can flow into the evaporation chamber (23) after being throttled by the expansion valve (20).

7. The evaporator refrigerant control system according to claim 6, characterized in that, The control valve (19) has two replenishment states: a first replenishment state and a second replenishment state. When the control valve (19) is in the first replenishment state, the fluid interface of the reservoir (24) can bypass the pump (21) to connect to the inlet of the expansion valve (20). When the control valve (19) is in the second replenishment state, the inlet of the pump (21) is connected to the fluid interface of the reservoir (24), and its outlet is connected to the inlet of the expansion valve (20), so that the fluid interface can be connected to the pump (21). The pump (21) can pressurize and supply the liquid in the reservoir (24) to the expansion valve (20); the operating state of the control valve (19) also includes the liquid pumping state. When the control valve (19) is in the liquid pumping state, the inlet of the pump (21) is connected to the evaporation chamber (23) and the outlet is connected to the chamber of the reservoir (24), so that the pump (21) can pump the liquid refrigerant in the evaporation chamber (23) to the liquid storage chamber of the reservoir.

8. The evaporator refrigerant control system according to claim 7, characterized in that, The control valve (19) includes a first switching valve (191), a second switching valve (192) and a third switching valve (193). The outlet of the pump (21) is connected to the inlet of the expansion valve (20), and the outlet of the expansion valve (20) is connected to the evaporation chamber (23). One end of the first switching valve (191) is connected to the fluid interface of the reservoir (24), and the other end is connected between the outlet of the pump (21) and the inlet of the expansion valve (20); One end of the second switching valve (192) is connected to the fluid interface of the reservoir (24), and the other end is connected to the inlet of the pump (21); One end of the third switching valve (193) is connected to the inlet of the pump (21), and the other end is connected to the evaporation chamber (23) so that liquid refrigerant can be obtained from the evaporation chamber (23).

9. The evaporator refrigerant control system according to claim 1, characterized in that, The liquid reservoir (24) is provided with a replenishment port (25) and a return port (26), the return port (26) being used to connect to the condenser (9).

10. An adsorption refrigeration device, comprising an adsorption bed (7), wherein the adsorption chamber of the adsorption bed (7) is provided with an adsorbent to exchange heat with a heat exchange channel (16), characterized in that, The evaporator (8) refrigerant control system as described in any one of claims 1-9 is included, wherein the evaporation chamber (23) of the evaporator (8) refrigerant control system is used to communicate with the adsorption chamber in the adsorption state.

11. The adsorption refrigeration device according to claim 10, characterized in that, It also includes a condenser (9); The evaporation chamber (23) of the evaporator (8) is optionally connected to the adsorption chambers corresponding to different adsorptions in the multiple adsorption beds (7) through the first valve group (10). The evaporator (8) is also provided with a refrigeration fluid channel (17) for exchanging heat with the liquid refrigerant in the evaporation chamber (23). The inlet end of the refrigeration fluid channel (17) is connected to the refrigeration fluid return port (5), and the outlet end is connected to the refrigeration fluid outlet (6). The condensing chamber of the condenser (9) is optionally connected to the adsorption chambers of different adsorption beds (7) in the plurality of adsorption beds (7) through the second valve group (11). The condenser (9) is also provided with a cooling fluid channel (18) for exchanging heat with the gaseous refrigerant in the condensing chamber. The inlet of the cooling fluid channel (18) is connected to the cooling fluid inlet (3), and the inlet of the cooling fluid channel (18) is connected to the cooling fluid outlet (4). One end of each of the heat exchange channels (16) is optionally connected to the heat source fluid inlet (1) via a first multi-way valve (12), and the other end of each of the heat exchange channels (16) is optionally connected to the heat source fluid outlet via a second multi-way valve (13). One end of each of the heat exchange channels (16) is optionally connected to the cooling fluid inlet (3) via a third multi-way valve (14), and the other end of each of the heat exchange channels (16) is optionally connected to the cooling fluid outlet (4) via a fourth multi-way valve (15).

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