Refrigerating device

Abstract

To provide a refrigerating device whose ability can be adjusted.SOLUTION: A refrigerating device comprises a compressor, a first adsorption region, a second adsorption region, a switching mechanism, a refrigerant flow passage, and a control unit. A refrigerant flows through the refrigerant flow passage. The control unit changes an operation mode. The compressor sucks and compresses a low-pressure refrigerant, and discharges it as a high-pressure refrigerant. The first adsorption region and the second adsorption region each comprise an adsorbent. The adsorbent adsorbs and desorbs the refrigerant in accordance with a pressure change of the refrigerant. The switching mechanism can switch the refrigerant flow passage between a first state and a second state. The operation mode includes a first operation mode and a second operation mode. In the first operation mode, an adsorption area of the adsorbent in the first adsorption region or the second adsorption region is a first value. In the second operation mode, the adsorption area is a second value different from the first value.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] Regarding refrigeration equipment. [Background technology]

[0002] Conventionally, refrigeration systems equipped with an adsorption refrigeration cycle have been used. Patent Document 1 (U.S. Patent Application Publication No. 2023 / 0417459) discloses an example of such a refrigeration system, which includes a heat source circuit having a pair of adsorbers that alternately adsorb and desorb a refrigerant, and a user circuit through which a heat medium circulates to recover the heat of adsorption or desorption of the refrigerant. The heat source circuit alternates between a mode in which the refrigerant is adsorbed by one adsorber and desorbed by the other adsorber, and a mode in which the refrigerant is desorbed by the one adsorber and adsorbed by the other adsorber. This allows the user circuit to continuously recover heat from the heat source circuit using the heat medium. Summary of the Invention [Problem to be solved by the invention]

[0003] In a vapor compression refrigeration cycle, which utilizes the heat of condensation and heat of evaporation of a refrigerant, the capacity can be adjusted by changing the amount of refrigerant circulated. However, in an adsorption refrigeration cycle, the capacity can be adjusted by changing the amount of refrigerant adsorbed onto the adsorbent or the amount of refrigerant desorbed from the adsorbent. [Means for solving the problem]

[0004] A refrigeration apparatus according to a first aspect includes a compressor, a first adsorption region, a second adsorption region, a switching mechanism, a refrigerant flow path, and a controller. A refrigerant flows through the refrigerant flow path. The controller switches the operating mode. The compressor draws in and compresses a low-pressure refrigerant, and discharges it as a high-pressure refrigerant. The first adsorption region and the second adsorption region have adsorbents. The adsorbents adsorb and desorb the refrigerant according to changes in the refrigerant pressure. The switching mechanism is capable of switching the refrigerant flow path between a first state and a second state. In the first state, the switching mechanism connects the first adsorption region to the discharge side of the compressor, placing the first adsorption region in a high-pressure state, and connects the second adsorption region to the suction side of the compressor, placing the second adsorption region in a low-pressure state. In the second state, the switching mechanism connects the first adsorption region to the suction side of the compressor, placing the first adsorption region in a low-pressure state, and connects the second adsorption region to the discharge side of the compressor, placing the second adsorption region in a high-pressure state. The operation modes include a first operation mode and a second operation mode. In the first operation mode, the adsorption area of ​​the refrigerant adsorbent in the first adsorption region or the second adsorption region is a first value. In the second operation mode, the adsorption area is a second value different from the first value.

[0005] The refrigeration device according to the first aspect is capable of adjusting the capacity of the refrigeration device.

[0006] A refrigeration device according to a second aspect is the refrigeration device according to the first aspect, wherein the first adsorption region or the second adsorption region is partitioned into a plurality of spaces to which a refrigerant can be supplied.

[0007] A refrigeration apparatus according to a third aspect is the refrigeration apparatus according to the second aspect, further comprising a first adjustment mechanism, the first adjustment mechanism adjusts the number of the spaces, and the control unit controls the first adjustment mechanism to change the operation mode.

[0008] A refrigeration apparatus according to a fourth aspect is the refrigeration apparatus according to the third aspect, wherein the first adjustment mechanism includes a first switching valve. The first switching valve opens and closes a flow path connecting the plurality of spaces. The control unit controls the first switching valve to change the operation mode.

[0009] A refrigeration device according to a fifth aspect is the refrigeration device according to any one of the first to fourth aspects, further comprising a plurality of first adsorption regions or a plurality of second adsorption regions.

[0010] A refrigeration device according to a sixth aspect is the refrigeration device according to the fifth aspect, further comprising a second adjustment mechanism. The second adjustment mechanism adjusts the number of first adsorption regions or second adsorption regions operating in the first operating mode or the second operating mode. The control unit controls the second adjustment mechanism to change the operating mode.

[0011] A seventh aspect of the refrigeration device is the refrigeration device of the sixth aspect, wherein the second adjustment mechanism includes a second switching valve. The second switching valve opens and closes a flow path connecting the plurality of first adsorption regions or the plurality of second adsorption regions. The control unit controls the second switching valve to change the operating mode.

[0012] A refrigeration device according to an eighth aspect is the refrigeration device according to any one of the first to seventh aspects, wherein the adsorbent includes a metal organic framework that includes metal ions and organic ligands.

[0013] A ninth aspect of the present invention is a refrigeration apparatus according to any one of the first to eighth aspects, wherein the refrigerant is selected from the group consisting of carbon dioxide, hydrocarbon refrigerant, ammonia, and water. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic diagram of a refrigeration device 100. FIG. [Figure 2] 2 is a schematic diagram of a first adsorption region 121 and a second adsorption region 122. FIG. [Figure 3] 2 is a schematic diagram of a first adsorption region 121 and a second adsorption region 122. FIG. [Figure 4] 2 is a schematic diagram of a first adsorption region 121 and a second adsorption region 122. FIG. [Figure 5] FIG. 2 is a block diagram of a control unit. [Figure 6] 10 is a schematic diagram of a first suction region 121 and a second suction region 122 in Modification A. FIG. [Figure 7]10 is a schematic diagram of a first suction region 121 and a second suction region 122 in Modification A. FIG. [Figure 8] 10 is a schematic diagram of a first suction region 121 and a second suction region 122 in Modification Example F. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] In the following description, expressions indicating directions such as "up" and "down" are used as appropriate, and these represent the directions when the refrigeration device 100 is installed and in normal use. For example, the up-down direction is the vertical direction. The vertical direction is the direction parallel to the direction of gravity. Furthermore, expressions such as horizontal, the same, and parallel may be used, but these do not only refer to completely horizontal, the same, parallel, etc., but also include substantially horizontal, the same, parallel, etc.

[0016] (1) Overall Configuration of the Refrigeration Device 100 As shown in FIG. 1, an example refrigeration apparatus 100 includes a heat source side circuit 101 and a user side circuit 102. The heat source side circuit 101 has a refrigerant flow path 111 through which a refrigerant flows. The user side circuit 102 has a heat medium flow path 112 through which a heat medium flows. In FIG. 1, the refrigerant flow path 111 is depicted by a thick line. The refrigerant flowing through the refrigerant flow path 111 is selected from the group consisting of, for example, carbon dioxide, hydrocarbon refrigerant, ammonia, and water. The hydrocarbon refrigerant is selected from the group consisting of, for example, propane, butane, and isobutane. The heat medium flowing through the heat medium flow path 112 is selected from the group consisting of, for example, water, brine, and air. Brine is a liquid with a freezing point of 0°C or lower. The refrigeration apparatus 100 is, for example, an air conditioner.

[0017] (1-1) Heat source side circuit 101 The heat source side circuit 101 constitutes a refrigeration cycle that functions as a heat pump that utilizes heat generated when the refrigerant is adsorbed to or desorbed from the adsorbent.

[0018] The heat source side circuit 101 includes a compressor 131, a bypass valve 132, a first adsorption region 121, a second adsorption region 122, a switching mechanism 135, a first adjustment mechanism 173, and a control unit 105 (see FIG. 3). The refrigerant flow path 111 connects the compressor 131, the bypass valve 132, the first adsorption region 121, the second adsorption region 122, and the switching mechanism 135.

[0019] The compressor 131 compresses the refrigerant flowing through the refrigerant flow path 111. The compressor 131 is, for example, a rotary compressor. The compressor 131 draws in low-pressure refrigerant from the refrigerant flow path 111, compresses it, and discharges it into the refrigerant flow path 111 as high-pressure refrigerant. The low-pressure refrigerant is the refrigerant in the refrigerant flow path 111 before being compressed by the compressor 131. The high-pressure refrigerant is the refrigerant in the refrigerant flow path 111 after being compressed by the compressor 131. During operation of the compressor 131, lubricating oil sealed in the refrigerant flow path 111 is supplied to the sliding parts of the compressor 131. A portion of the lubricating oil is accumulated at the bottom of a casing 163 of the compressor 131.

[0020] In the first adsorption region 121 and the second adsorption region 122, the heat of adsorption or desorption heat is recovered by the heat medium flowing through the heat medium flow path 112. The heat of adsorption is hot heat generated when the adsorbent adsorbs the refrigerant. The heat of desorption is cold heat generated when the adsorbent desorbs the refrigerant. The first adsorption region 121 and the second adsorption region 122 are connected to the switching mechanism 135 in the refrigerant flow path 111.

[0021] The bypass valve 132 reduces the pressure of the refrigerant flowing through the refrigerant flow path 111. The bypass valve 132 is, for example, an electronic expansion valve. The bypass valve 132 is provided between the first adsorption region 121 and the second adsorption region 122.

[0022] The switching mechanism 135 switches the flow direction of the refrigerant flowing through the refrigerant flow path 111. The switching mechanism 135 is, for example, a four-way switching valve. The switching mechanism 135 is configured to switch the refrigerant flow path 111 between a first state in which the flow direction is indicated by the solid line in FIG. 1 and a second state in which the flow direction is indicated by the dashed line in FIG. 1. In the first state, the discharge side of the compressor 131 is connected to the first adsorption region 121, and the first adsorption region 121 is in a high-pressure state. In the first state, the suction side of the compressor 131 is also connected to the second adsorption region 122, and the second adsorption region 122 is in a low-pressure state. In the second state, the discharge side of the compressor 131 is connected to the second adsorption region 122, and the first adsorption region 121 is in a low-pressure state. In the second state, the suction side of the compressor 131 is also connected to the first adsorption region 121, and the second adsorption region 122 is in a high-pressure state.

[0023] (1-2) User side circuit 102 1, the utilization-side circuit 102 functions as a heat transfer means for utilizing the heat of the heat source-side circuit via a heat medium. The heat medium flowing through the heat medium flow path 112 transfers the heat of adsorption or desorption recovered in the first adsorption region 121 or the second adsorption region 122 to a predetermined location.

[0024] The utilization side circuit 102 includes a first fluid pump 141, a first heat exchanger 142, a first fan 143, a first adsorption region 121, a second fluid pump 151, a second heat exchanger 152, a second fan 153, a second adsorption region 122, and flow path changing units 156-159. The heat medium flow path 112 connects the first fluid pump 141, the first heat exchanger 142, the first adsorption region 121, the second fluid pump 151, the second heat exchanger 152, the second adsorption region 122, and the flow path changing units 156-159.

[0025] The first fluid pump 141 sends the heat medium to the first heat exchanger 142. The first heat exchanger 142 exchanges heat between the heat medium and air. The first fan 143 generates a flow of air passing through the first heat exchanger 142 so that heat exchange occurs in the first heat exchanger 142.

[0026] The second fluid pump 151 sends the heat medium to the second heat exchanger 152. The second heat exchanger 152 exchanges heat between the heat medium and air. The second fan 153 generates a flow of air passing through the second heat exchanger 152 so that heat exchange occurs in the second heat exchanger 152.

[0027] The flow path changing units 156-159 change the connection state of the heat medium flow path 112 to change the flow path through which the heat medium flows. The flow path changing units 156-159 are, for example, three-way switching valves. The flow path changing units 156-159 are configured to be able to switch the heat medium flow path 112 between a third connection state indicated by the solid line in FIG. 1 and a fourth connection state indicated by the dashed line in FIG. 1.

[0028] The heat medium flow path 112 has two independent flow paths, a first circulation path and a second circulation path, in each of the third and fourth states. The heat medium circulates through both the first and second circulation paths. In FIG. 1, the flow direction of the heat medium in the third state is indicated by a solid line, and the flow direction of the heat medium in the fourth state is indicated by a dashed line.

[0029] In the third state, the first circulation flow path connects first fluid pump 141, first heat exchanger 142, flow path changing unit 156, first adsorption region 121, and flow path changing unit 157. In the third state, the second circulation flow path connects second fluid pump 151, second heat exchanger 152, flow path changing unit 158, second adsorption region 122, and flow path changing unit 159.

[0030] In the fourth state, the first circulation flow path connects the first fluid pump 141, the first heat exchanger 142, the flow path changing unit 156, the second adsorption region 122, and the flow path changing unit 157. In the fourth state, the second circulation flow path connects the second fluid pump 151, the second heat exchanger 152, the flow path changing unit 158, the first adsorption region 121, and the flow path changing unit 159.

[0031] (1-3) First adsorption region 121 and second adsorption region 122 As shown in FIG. 2, the first adsorption region 121 and the second adsorption region 122 include a casing 163, a heat recovery member 160, and an adsorbent 181. The first adsorption region 121 and the second adsorption region 122 each have a first space 164a through which a refrigerant flows and a second space 164b through which a heat medium flows. The first space 164a is part of the refrigerant flow path 111. The second space 164b is part of the heat medium flow path 112. The first space 164a and the second space 164b do not communicate with each other. The heat recovery member 160 is depicted in a simplified form in all figures except FIG. 2. In FIG. 2, the first communication flow path 173x and the first switching valve 174 are depicted in a simplified form.

[0032] For example, the casing 163 is installed so that its longitudinal direction is parallel to the vertical direction. The casing 163 houses the adsorbent 181 and the heat recovery member 160. The casing 163 has an inlet 163a and an outlet 163b connected to the heat source side circuit 101.

[0033] The refrigerant flowing through the refrigerant flow path 111 passes through the inlet 163a and flows into the interior of the casing 163. The refrigerant inside the casing 163 flows out from the interior of the casing 163 through the outlet 163b. The inlet 163a functions as a refrigerant inlet for the first adsorption region 121 and the second adsorption region 122. The outlet 163b functions as a refrigerant outlet for the first adsorption region 121 and the second adsorption region 122. The inlet 163a and the outlet 163b are located on the bottom surface of the casing 163. Because the inlet 163a and the outlet 163b are located on the same surface of the casing 163, the heat recovery member 160 is positioned so as to avoid the refrigerant flow path from the inlet to the outlet within the casing 163.

[0034] The heat medium flowing through the heat medium flow path 112 flows into the heat transfer tube 162 through the first end 162c, and flows out of the heat transfer tube 162 through the second end 162d.

[0035] The heat recovery member 160 transfers heat generated when the refrigerant is adsorbed to and desorbed from the adsorbent 181 to a heat medium for transporting the heat to the user side.

[0036] The heat recovery member 160 is, for example, a cross-fin type. The heat recovery member 160 includes a heat transfer tube 162 and a plurality of fins 161.

[0037] The heat transfer tube 162 has a plurality of straight pipe sections 162a extending linearly and a folded-back section 162b connecting two straight pipe sections 162a. The straight pipe sections 162a are preferably installed parallel to the longitudinal direction of the casing 163. A first end 162c and a second end 162d of the heat transfer tube 162 are connected to the heat medium flow path 112.

[0038] The fins 161 have through holes in their thickness direction, through which the straight pipe portions 162a of the heat transfer pipes 162 penetrate. The fins 161 are arranged around the straight pipe portions 162a of the heat transfer pipes 162 so as to be stacked at predetermined intervals along the direction in which the straight pipe portions 162a extend.

[0039] The multiple fins 161 intersect with the vertical direction. The main surfaces of the multiple fins 161 extend along a horizontal plane. The direction in which the multiple fins 161 extend is perpendicular to the vertical direction. However, the inclination of the main surfaces of the multiple fins 161 with respect to the vertical direction does not have to be 90 degrees. The inclination of the main surfaces of the multiple fins 161 with respect to the vertical direction is preferably 45 degrees or more, more preferably 60 degrees or more, and even more preferably 75 degrees or more.

[0040] The heat recovery member 160 is disposed inside the casing 163. The heat recovery member 160 and the casing 163 are disposed with a gap therebetween. A refrigerant fills the space between the heat recovery member 160 and the casing 163.

[0041] Specifically, the multiple fins 161 of the heat recovery member 160 do not contact the inner surface of the side surface of the casing 163. The folded portion 162b of the heat transfer tube 162 does not contact the inner surface of the casing 163. The first end 162c and the second end 162d of the heat transfer tube 162 penetrate the upper surface of the casing 163 in the vertical direction.

[0042] The adsorbent 181 is provided in the first space 164a. The adsorbent 181 adsorbs and desorbs the refrigerant flowing through the first space 164a in response to changes in the pressure of the refrigerant flowing through the first space 164a. The adsorbent 181 is supported on a first surface 182, which is the surface of the heat recovery member 160 that comes into contact with the refrigerant.

[0043] The first surface 182 includes at least a portion of the outer surfaces of the multiple fins 161 and the heat transfer tubes 162. The first surface 182 is, for example, the surfaces of the multiple fins 161 and the outer surfaces of the heat transfer tubes 162. The first surface 182 is in contact with the first space 164a. Therefore, the refrigerant in the first space 164a comes into contact with the adsorbent 181 supported on the first surface 182.

[0044] The adsorbent 181 supported on the first surface 182 includes a metal-organic framework (MOF) containing metal ions and organic ligands. A metal-organic framework is a porous material with an extremely large specific surface area obtained by the reaction of metal ions with organic ligands. In a metal-organic framework, organic ligands are linked to metal ions to obtain a polymer structure with countless openings inside. The opening size and topology of the metal-organic framework can be adjusted by selecting and combining metal ions and organic ligands. Therefore, the opening size of the metal-organic framework can be adjusted and the target substance can be selectively adsorbed by selecting and combining metal ions and organic ligands. The metal-organic framework is used, for example, as a porous material having the function of selectively storing and separating molecules and ions.

[0045] In the refrigeration device 100, a metal-organic framework is used as an adsorbent 181 for adsorbing and desorbing the refrigerant flowing through the refrigerant flow path 111. Examples of metal-organic frameworks include MOF-5, MOF-200, UiO-66, and MIL-101. The adsorbent 181 used in the refrigeration device 100 is, for example, a powder of a metal-organic framework or a molded product of a metal-organic framework. In this case, the adsorbent 181 is supported on the first surface 182 by adhering a mixture of the adsorbent 181 and a binder to the first surface 182.

[0046] The adsorbent 181 adsorbs the refrigerant in the first space 164a when the pressure of the refrigerant in the first space 164a is equal to or higher than the adsorption pressure. The adsorbent 181 desorbs the refrigerant in the first space 164a when the pressure of the refrigerant in the first space 164a is equal to or lower than the desorption pressure. The adsorption pressure is the minimum value of the range of pressures at which the adsorbent 181 can adsorb the refrigerant. The desorption pressure is the maximum value of the range of pressures at which the adsorbent 181 can desorb the refrigerant. The adsorption pressure and desorption pressure differ depending on the type of adsorbent 181 and the type of refrigerant.

[0047] The first adsorption region 121 and the second adsorption region 122 each have one or more partition plates 164 therein. This partition plate 164 divides the first adsorption region 121 and the second adsorption region 122 into multiple spaces (hereinafter referred to as refrigerant introduction spaces S) into which the refrigerant can be individually introduced. The multiple refrigerant introduction spaces S are connected by a single refrigerant flow path 111. In this embodiment, the number of partition plates 164 is two for each of the first adsorption region 121 and the second adsorption region 122. Therefore, the number of refrigerant introduction spaces S in each of the first adsorption region 121 and the second adsorption region 122 is three: a first refrigerant introduction space S1, a second refrigerant introduction space S2, and a third refrigerant introduction space S3. However, the number of refrigerant introduction spaces S is not particularly limited thereto. The number of refrigerant introduction spaces S may be two, four, or more.

[0048] The first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3 have the same amount of adsorbent 181.

[0049] The partition plates 164 are disposed between adjacent fins 161. Therefore, the gap between adjacent fins 161 sandwiching the partition plate 164 is wider than the gap between adjacent fins 161 without the partition plate 164 sandwiched between them. The main surface of the partition plate 164 extends along a horizontal plane. In this embodiment, two partition plates 164 are disposed.

[0050] The partition plate 164 has holes through which the heat transfer tubes 162 pass. The diameter of the holes is approximately the same as the diameter of the heat transfer tubes 162. Therefore, the partition plate 164 completely separates the interiors of the first adsorption region 121 and the second adsorption region 122.

[0051] (1-4) First adjustment mechanism 173 As shown in FIG. 3, the first adjustment mechanism 173 adjusts the number of refrigerant introduction spaces S into which the refrigerant is introduced.

[0052] The first adjustment mechanism 173 includes a first communication flow path 173x and a first switching valve 174. The first communication flow path 173x is a part of the refrigerant flow path 111. The first communication flow path 173x connects the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3, allowing them to communicate with each other. A refrigerant flows through the first communication flow path 173x.

[0053] In this embodiment, there are two first switching valves 174: a first on-off valve 174a and a second on-off valve 174b. However, the number of first switching valves 174 is not particularly limited to this. The number of first switching valves 174 may be one, or may be three or more. The first switching valve 174 opens and closes a first communication flow path 173x that connects the multiple refrigerant introduction spaces S. The control unit 105 controls the first switching valve 174 to change the operation mode.

[0054] The first switching valve 174 is disposed on the first communication flow path 173x. In this embodiment, the first on-off valve 174a is disposed on the first communication flow path 173x that connects the first refrigerant introduction space S1 and the second refrigerant introduction space S2. The second on-off valve 174b is disposed on the first communication flow path 173x that connects the second refrigerant introduction space S2 and the third refrigerant introduction space S3.

[0055] 3 shows a state in which both the first on-off valve 174a and the second on-off valve 174b are open. When both the first on-off valve 174a and the second on-off valve 174b are open, the refrigerant is supplied to all of the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3. In this case, the adsorbents 181 arranged in all of the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3 can come into contact with the refrigerant.

[0056] 4, when the first on-off valve 174a is closed and the second on-off valve 174b is opened, the refrigerant is not supplied to the first refrigerant introduction space S1, but is supplied to the second refrigerant introduction space S2 and the third refrigerant introduction space S3. In this case, the adsorbents 181 arranged in the second refrigerant introduction space S2 and the third refrigerant introduction space S3 can come into contact with the refrigerant.

[0057] When both the first on-off valve 174a and the second on-off valve 174b are closed, the refrigerant is not supplied to the first refrigerant introduction space S1 and the second refrigerant introduction space S2, but is supplied only to the third refrigerant introduction space S3. In this case, only the adsorbent 181 arranged in the third refrigerant introduction space S3 can come into contact with the refrigerant.

[0058] (1-5) Control unit 105 4, the control unit 105 controls the operation of each component of the refrigeration apparatus 100. In detail, the control unit 105 controls the compressor 131, the bypass valve 132, the switching mechanism 135, the flow path changing units 156 to 159, the first adjustment mechanism 173, and the first switching valve 174. The control unit 105 has a microcomputer including a CPU, a memory, etc.

[0059] The control unit 105 controls the rotation speed of the compressor 131. The control unit 105 controls the timing at which the compressor 131 is started and the timing at which the compressor 131 is stopped.

[0060] The control unit 105 controls the opening degree of the bypass valve 132 .

[0061] The control unit 105 controls the switching mechanism 135 to switch the refrigerant flow path 111 between a first state and a second state. Specifically, the control unit 105 controls the switching mechanism 135 so that the period during which the refrigerant flow path 111 is in the first state and the period during which the refrigerant flow path 111 is in the second state are the same length. However, the control unit 105 may also control the switching mechanism 135 so that the period during which the refrigerant flow path 111 is in the first state and the period during which the refrigerant flow path 111 is in the second state are different lengths. The period during which the refrigerant flow path 111 is in the first state is the period from when the refrigerant flow path 111 switches to the first state to when it switches to the second state. The period during which the refrigerant flow path 111 is in the second state is the period from when the refrigerant flow path 111 switches to the second state to when it switches to the first state.

[0062] The control unit 105 controls the flow path changing units 156-159 to switch the connection state of the utilization side circuit 102 and change the flow path through which the heat medium flows.

[0063] The control unit 105 changes the operation mode by controlling the first adjustment mechanism 173. In detail, the control unit 105 changes the operation mode by controlling the first switching valve 174. The operation modes include a first operation mode and a second operation mode.

[0064] In the first operating mode, the adsorption area of ​​the first adsorption region 121 or the second adsorption region 122 is a first value. The adsorption area is the surface area of ​​the porous portion of the adsorbent 181. The adsorption area is the area where the refrigerant can come into contact with the adsorbent 181. In this embodiment, the surface area of ​​the porous portion of the adsorbent 181 is the BET specific surface area obtained by the BET method (N2). The specific surface area by the BET method (N2) can be measured by the BET method (nitrogen adsorption method) described in JIS Z 8830:2013. The adsorption area of ​​the first refrigerant introduction space S1, the adsorption area of ​​the second refrigerant introduction space S2, and the adsorption area of ​​the third refrigerant introduction space S3 are the same. The adsorption area of ​​the first adsorption region 121 is the same as the adsorption area of ​​the second adsorption region 122. Here, the adsorption areas being "same" means that the same heat generation or heat absorption capacity is obtained under the same operating conditions. For example, when the same adsorbent is supported on the surfaces of a plurality of fins 161, the adsorption area is equal to the surface area of ​​the plurality of fins 161.

[0065] For example, in the first operating mode, both the first on-off valve 174a and the second on-off valve 174b of the first switching valve 174 are open. Therefore, the refrigerant is supplied to all of the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3. In this case, the adsorbents 181 arranged in all of the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3 can come into contact with the refrigerant. In the first operating mode, the first value of the adsorption area is the total surface area of ​​the porous portions of the adsorbents 181 arranged in all of the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3.

[0066] In the second operating mode, the adsorption area has a second value. The second value of the adsorption area is different from the first value of the adsorption area. For example, in the second operating mode, the first on-off valve 174a is closed and the second on-off valve 174b is open. Therefore, refrigerant is not supplied to the first refrigerant introduction space S1, but is supplied to the second refrigerant introduction space S2 and the third refrigerant introduction space S3. In this case, the adsorbent 181 arranged in the second refrigerant introduction space S2 and the third refrigerant introduction space S3 can come into contact with the refrigerant. In the second operating mode, the second value of the adsorption area is the total surface area of ​​the porous portions of the adsorbent 181 arranged in the second refrigerant introduction space S2 and the third refrigerant introduction space S3. Therefore, the capacity of the refrigeration device 100 is lower in the second operating mode than in the first operating mode.

[0067] (2) Operation of the Refrigeration Device 100 The operation of the refrigeration apparatus 100 will be described assuming that the refrigeration apparatus 100 is an air conditioner. In this case, the first heat exchanger 142 is an indoor heat exchanger, and the second heat exchanger 152 is an outdoor heat exchanger.

[0068] The adsorbent 181 in the first adsorption region 121 and the second adsorption region 122 adsorbs and desorbs the refrigerant in the refrigerant flow path 111. The adsorbent 181 adsorbs the refrigerant when in contact with the high-pressure refrigerant in the first space 164a. The adsorbent 181 desorbs the refrigerant when in contact with the low-pressure refrigerant in the first space 164a.

[0069] When refrigerant flow path 111 is in the first state, the discharge side of compressor 131 can be connected to first adsorption region 121 to create a high-pressure state within first adsorption region 121, and the suction side of compressor 131 can be connected to second adsorption region 122 to create a low-pressure state within second adsorption region 122. When first adsorption region 121 is in a high-pressure state, adsorbent 181 in first adsorption region 121 is in contact with high-pressure refrigerant in first space 164a. When second adsorption region 122 is in a low-pressure state, adsorbent 181 in second adsorption region 122 is in contact with low-pressure refrigerant in first space 164a.

[0070] When refrigerant flow path 111 is in the second state, the suction side of compressor 131 can be connected to first adsorption region 121 to create a low-pressure state within first adsorption region 121, and the discharge side of compressor 131 can be connected to second adsorption region 122 to create a high-pressure state within second adsorption region 122. When first adsorption region 121 is in a low-pressure state, adsorbent 181 in first adsorption region 121 is in contact with low-pressure refrigerant in first space 164a. When second adsorption region 122 is in a high-pressure state, adsorbent 181 in second adsorption region 122 is in contact with high-pressure refrigerant in first space 164a.

[0071] The following describes changes in the adsorption amount, which is the amount of refrigerant adsorbed by the adsorbent 181, when the refrigerant flow path 111 is in the first state. In the initial state, the adsorption amount of the adsorbent 181 in the first adsorption region 121 is a first adsorption amount, and the adsorption amount of the adsorbent 181 in the second adsorption region 122 is a second adsorption amount. The second adsorption amount is greater than the first adsorption amount.

[0072] When the refrigerant flow path 111 is in the first state, the adsorbent 181 in the first adsorption region 121 contacts the high-pressure refrigerant, and the adsorbent 181 in the second adsorption region 122 contacts the low-pressure refrigerant. In the first adsorption region 121, the adsorbent 181 gradually adsorbs the refrigerant, releasing heat in the process. In the second adsorption region 122, the adsorbent 181 gradually desorbs the refrigerant, absorbing heat in the process. Therefore, the adsorption amount of the adsorbent 181 in the first adsorption region 121 increases from the first adsorption amount to the second adsorption amount, and the adsorption amount of the adsorbent 181 in the second adsorption region 122 decreases from the second adsorption amount to the first adsorption amount.

[0073] The following describes the change in the adsorption amount, which is the amount of refrigerant adsorbed by the adsorbent 181, when the refrigerant flow path 111 is in the second state. In the initial state, the adsorption amount of the adsorbent 181 in the first adsorption region 121 is the second adsorption amount, and the adsorption amount of the adsorbent 181 in the second adsorption region 122 is the first adsorption amount.

[0074] When the refrigerant flow path 111 is in the second state, the adsorbent 181 in the first adsorption region 121 contacts the low-pressure refrigerant, and the adsorbent 181 in the second adsorption region 122 contacts the high-pressure refrigerant. In the first adsorption region 121, the adsorbent 181 gradually desorbs the refrigerant, absorbing heat in the process. In the second adsorption region 122, the adsorbent 181 gradually adsorbs the refrigerant, releasing heat in the process. Therefore, the adsorption amount of the adsorbent 181 in the first adsorption region 121 decreases from the second adsorption amount to the first adsorption amount, and the adsorption amount of the adsorbent 181 in the second adsorption region 122 increases from the first adsorption amount to the second adsorption amount.

[0075] When refrigerant flow path 111 is in the first state and heat medium flow path 112 is in the third state, in first adsorption region 121, hot heat generated in the process of adsorbing refrigerant in first space 164a to adsorbent 181 is transferred to the heat medium in second space 164b. Meanwhile, in second adsorption region 122, cold heat generated in the process of desorbing refrigerant adsorbed to adsorbent 181 is transferred to the heat medium in second space 164b. Therefore, in first adsorption region 121, heat is transferred from the refrigerant to the heat medium flowing through the first circulation flow path, and in second adsorption region 122, heat is transferred from the heat medium flowing through the second circulation flow path to the refrigerant.

[0076] Thereafter, when the adsorption amount of the adsorbent 181 in the first adsorption region 121 reaches the second adsorption amount, it becomes difficult for the adsorbent 181 in the first adsorption region 121 to adsorb the refrigerant. When this state is reached, the refrigerant flow path 111 is switched from the first state to the second state, and the heat medium flow path 112 is switched from the third state to the fourth state.

[0077] When refrigerant flow path 111 is in the second state and heat medium flow path 112 is in the fourth state, in second adsorption region 122, hot heat generated in the process of adsorbing refrigerant in first space 164a to adsorbent 181 is transferred to the heat medium in second space 164b. Meanwhile, in first adsorption region 121, cold heat generated in the process of desorbing refrigerant adsorbed to adsorbent 181 from adsorbent 181 is transferred to the heat medium in second space 164b. Therefore, in first adsorption region 121, heat is transferred from the heat medium flowing through the second circulation flow path to the refrigerant, and in second adsorption region 122, heat is transferred from the refrigerant to the heat medium flowing through the first circulation flow path.

[0078] Thereafter, when the adsorption amount of the adsorbent 181 in the second adsorption region 122 reaches the second adsorption amount, it becomes difficult for the adsorbent 181 in the second adsorption region 122 to adsorb the refrigerant. When this state is reached, the refrigerant flow path 111 is switched from the second state to the first state, and the heat medium flow path 112 is switched from the fourth state to the third state.

[0079] As described above, by alternately switching the refrigerant flow path 111 between the first state and the second state, it is possible to continuously adsorb the refrigerant to the adsorbent 181 in either the first adsorption region 121 or the second adsorption region 122. Furthermore, by alternately switching the heat medium flow path 112 between the third state and the fourth state in accordance with the switching between the first state and the second state, it is possible to continuously supply the heat generated when the refrigerant is adsorbed to the adsorbent 181 to the heat medium flowing through the first circulation flow path.

[0080] Therefore, the refrigeration apparatus 100 can continue to supply the heat medium heated by recovering the heat of adsorption to the first heat exchanger 142 connected to the first circulation flow path. The air heated by heat exchange with the heat medium in the first heat exchanger 142 is sent to a predetermined location by the first fan 143.

[0081] The control unit 105 also controls the first switching valve 174 to switch the operation mode between a first operation mode and a second operation mode. For example, as shown in FIG. 3, in the first operation mode, the control unit 105 opens both the first on-off valve 174a and the second on-off valve 174b of the first switching valve 174. In this case, the refrigerant is introduced into all of the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3. As a result, the adsorbents 181 present in all of the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3 come into contact with the refrigerant. At this time, the adsorption area of ​​the adsorbents 181 is a first value. As shown in FIG. 4, in the second operation mode, the control unit 105 closes the first on-off valve 174a and opens the second on-off valve 174b. In this case, the refrigerant is introduced only into the second refrigerant introduction space S2 and the third refrigerant introduction space S3. As a result, the adsorbent 181 present only in the second refrigerant introduction space S2 and the third refrigerant introduction space S3 comes into contact with the refrigerant. At this time, the adsorption area of ​​the adsorbent 181 is a second value. The second value is smaller than the first value. Therefore, the capacity of the refrigeration apparatus 100 in the second operation mode is reduced compared to the capacity of the refrigeration apparatus 100 in the first operation mode.

[0082] As described above, the capacity of the refrigeration device 100 can be adjusted by changing the operation mode.

[0083] (3) Features (3-1) In this embodiment, refrigeration device 100 includes a first operating mode and a second operating mode, and thereby can change the adsorption area where refrigerant comes into contact with adsorbent 181 in first adsorption region 121 or second adsorption region 122.

[0084] According to this configuration, by changing the adsorption area where the refrigerant comes into contact with the adsorbent 181 in the first adsorption region 121 or the second adsorption region 122, the capacity of the refrigeration device 100 can be adjusted.

[0085] (3-2) In this embodiment, the first adsorption region 121 or the second adsorption region 122 is partitioned into a plurality of spaces into which a refrigerant can be introduced individually.

[0086] According to this configuration, by changing the number of spaces into which the refrigerant can be introduced individually, the adsorption area where the refrigerant comes into contact with the adsorbent 181 in first adsorption region 121 or second adsorption region 122 can be changed.

[0087] (3-3) In this embodiment, the refrigeration apparatus 100 further includes a first adjustment mechanism 173. The first adjustment mechanism 173 adjusts the number of refrigerant introduction spaces S. The control unit 105 controls the first adjustment mechanism 173 to change the operation mode.

[0088] According to this configuration, by adjusting the number of refrigerant introduction spaces S using first adjustment mechanism 173, the adsorption area where the refrigerant comes into contact with adsorbent 181 in first adsorption region 121 or second adsorption region 122 can be changed.

[0089] (3-4) In this embodiment, the first adjustment mechanism 173 includes a first switching valve 174. The first switching valve 174 opens and closes a first communication flow path 173x that connects the first refrigerant introduction space S1, the second refrigerant introduction space S2, and the third refrigerant introduction space S3. The control unit 105 controls the first switching valve 174 to change the operation mode.

[0090] According to this configuration, by adjusting the number of refrigerant introduction spaces S into which the refrigerant is introduced using the first switching valve 174, the adsorption area where the refrigerant comes into contact with the adsorbent 181 in the first adsorption area 121 or the second adsorption area 122 can be changed.

[0091] -Variation- (1) Variation A In the above embodiment, the control unit 105 controls the first adjustment mechanism 173 to change the operation mode, and the first adjustment mechanism 173 adjusts the number of refrigerant introduction spaces S into which the refrigerant is introduced, but the method of changing the operation mode is not particularly limited to this.

[0092] 6, the refrigeration device 100 may further include a second adjustment mechanism 175. In this case, the refrigeration device 100 includes a plurality of first adsorption regions 121 and second adsorption regions 122. Because the first adsorption regions 121 and the second adsorption regions 122 have the same configuration, the following description will be given using the first adsorption regions 121 as an example. However, the number of first adsorption regions 121 and the number of second adsorption regions 122 may be the same or different.

[0093] In Modification A, the number of first adsorption regions 121 is three: third adsorption region 121a, fourth adsorption region 121b, and fifth adsorption region 121c. Third adsorption region 121a, fourth adsorption region 121b, and fifth adsorption region 121c simultaneously operate in the first operation mode or the second operation mode. Third adsorption region 121a, fourth adsorption region 121b, and fifth adsorption region 121c contain the same type of adsorbent 181. The adsorption area of ​​third adsorption region 121a, the adsorption area of ​​fourth adsorption region 121b, and the adsorption area of ​​fifth adsorption region 121c are the same.

[0094] The second adjustment mechanism 175 adjusts the number of third suction regions 121a, fourth suction regions 121b, and fifth suction regions 121c that simultaneously operate in the first operation mode or the second operation mode. The control unit 105 controls the second adjustment mechanism 175 to change the operation mode.

[0095] The second adjustment mechanism 175 includes a second communication flow path 175x, a third communication flow path 175y, and a second switching valve 176. The second communication flow path 175x connects the third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c, thereby allowing them to communicate with each other. Specifically, the second communication flow path 175x connects the refrigerant inlets 163a of the third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c. A refrigerant flows through the second communication flow path 175x. The third communication flow path 175y connects the third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c, thereby allowing them to communicate with each other. More specifically, the third communication channel 175y connects the coolant outlet ports 163b of the third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c. The coolant flows through the third communication channel 175y.

[0096] In Modification A, the number of second switching valves 176 is six: a third on-off valve 176a, a fourth on-off valve 176b, a fifth on-off valve 176c, a sixth on-off valve 176d, a seventh on-off valve 176e, and an eighth on-off valve 176f. However, the number of second switching valves 176 is not particularly limited to this. The number of second switching valves 176 may be one or more. The second switching valve 176 opens and closes a second communication flow path 175x that connects a plurality of first adsorption regions 121, and a third communication flow path 175y. The control unit 105 controls the second switching valves 176 to change the operation mode.

[0097] Three second switching valves 176 are arranged on each of the second communication flow path 175x and the third communication flow path 175y. The number of second switching valves 176 arranged on the second communication flow path 175x and the number of second switching valves 176 arranged on the third communication flow path 175y may be the same as or different from each other.

[0098] In Modification A, the third on-off valve 176a, the fourth on-off valve 176b, and the fifth on-off valve 176c are arranged on the second communication flow path 175x. Specifically, the third on-off valve 176a is arranged in the second communication flow path 175x that connects the third suction region 121a and the other first suction regions 121. The fourth on-off valve 176b is arranged in the second communication flow path 175x that connects the fourth suction region 121b and the other first suction regions 121. The fifth on-off valve 176c is arranged in the second communication flow path 175x that connects the fifth suction region 121c and the other first suction regions 121.

[0099] The sixth on-off valve 176d, the seventh on-off valve 176e, and the eighth on-off valve 176f are arranged on the third communication flow path 175y. Specifically, the sixth on-off valve 176d is arranged in the third communication flow path 175y that connects the third suction region 121a and the other first suction regions 121. The seventh on-off valve 176e is arranged in the third communication flow path 175y that connects the fourth suction region 121b and the other first suction regions 121. The eighth on-off valve 176f is arranged in the third communication flow path 175y that connects the fifth suction region 121c and the other first suction regions 121.

[0100] 6, when the control unit 105 opens all of the third on-off valve 176a, the fourth on-off valve 176b, the fifth on-off valve 176c, the sixth on-off valve 176d, the seventh on-off valve 176e, and the eighth on-off valve 176f, the refrigerant is supplied to all of the third adsorption region 121a, the fourth on-off valve 121b, and the fifth on-off valve 121c. In this case, the adsorbents 181 arranged in all of the third adsorption region 121a, the fourth on-off valve 121b, and the fifth on-off valve 121c can come into contact with the refrigerant.

[0101] When the control unit 105 closes the fifth on-off valve 176c and the eighth on-off valve 176f and opens the third on-off valve 176a, the fourth on-off valve 176b, the sixth on-off valve 176d, and the seventh on-off valve 176e, the refrigerant is not supplied to the fifth adsorption region 121c but is supplied to the third adsorption region 121a and the fourth adsorption region 121b. In this case, the adsorbents 181 arranged in the third adsorption region 121a and the fourth adsorption region 121b can come into contact with the refrigerant.

[0102] 7, when the control unit 105 closes the fourth on-off valve 176b, the fifth on-off valve 176c, the seventh on-off valve 176e, and the eighth on-off valve 176f and opens the third on-off valve 176a and the sixth on-off valve 176d, the refrigerant is not supplied to the fourth adsorption region 121b and the fifth adsorption region 121c, but is supplied only to the third adsorption region 121a. In this case, only the adsorbent 181 arranged in the third adsorption region 121a can come into contact with the refrigerant.

[0103] According to this configuration, by adjusting the number of the third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c into which the refrigerant is introduced using the second adjustment mechanism 175, the adsorption area where the refrigerant comes into contact with the adsorbent 181 in the third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c can be changed.

[0104] (2) Variation B In the above embodiment, the operation modes include a first operation mode and a second operation mode, but the number of operation modes is not particularly limited to this.

[0105] The operation mode may include a different operation mode in addition to the first operation mode and the second operation mode. The operation mode may include a plurality of operation modes with gradually different adsorption areas. In this case, the capacity of the refrigeration device 100 can be adjusted more finely.

[0106] (3) Variation C In the above embodiment, the control unit 105 controls the first adjustment mechanism 173 to change the operation mode, and the first adjustment mechanism 173 adjusts the number of refrigerant introduction spaces S into which the refrigerant is introduced, but this is not particularly limited.

[0107] The refrigeration device 100 may include both the first adjustment mechanism 173 and the second adjustment mechanism 175.

[0108] Furthermore, the number of first adjustment mechanisms 173 and the number of second adjustment mechanisms 175 may differ among the plurality of first suction regions 121 or the plurality of second suction regions 122.

[0109] (4) Variation D In the above embodiment, the adsorption area of ​​the first refrigerant introduction space S1, the adsorption area of ​​the second refrigerant introduction space S2, and the adsorption area of ​​the third refrigerant introduction space S3 are the same, but this is not particularly limited.

[0110] The adsorption area of ​​the first refrigerant introduction space S1, the adsorption area of ​​the second refrigerant introduction space S2, and the adsorption area of ​​the third refrigerant introduction space S3 may be different.

[0111] (5) Variation E In the above-described modification A, the third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c have the same adsorbent material 181, but this is not particularly limited. The third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c may have different adsorbents 181.

[0112] In this case, the third adsorption region 121a, the fourth adsorption region 121b, and the fifth adsorption region 121c can have different adsorption areas.

[0113] (6) Variation F In the above embodiment, adjacent fins 161 are arranged with equal gaps between them, but the positions of adjacent fins are not particularly limited to this.

[0114] As shown in FIG. 8, the gap between adjacent fins 161 sandwiching a partition plate 164 may be wider than the gap between adjacent fins 161 without a partition plate 164 sandwiched therebetween.

[0115] (7) Variation G In the above embodiment, the casing 163 has an inlet 163a and an outlet 163b for the refrigerant, but is not limited to this.

[0116] Within the casing 163, the inlet and outlet for the refrigerant may be the same.

[0117] (8) Variation H The adsorbent 181 may be filled in at least a part of the space through which the refrigerant flows.

[0118] The metal-organic framework used as the adsorbent 181 is a porous solid. A gaseous refrigerant can be adsorbed to and desorbed from the adsorbent 181 while easily passing through the adsorbent 181. Therefore, the pressure loss when the refrigerant passes through the adsorbent 181 is small enough that the effect of this loss does not need to be considered. Therefore, in this modification, the amount of adsorbent 181 used is greater than when the adsorbent 181 is supported on the first surface 182, and therefore the amount of heat generated from the adsorbent 181 when the refrigerant is adsorbed can be increased. As a result, the efficiency of recovering hot and cold energy by the heat transfer medium can be improved.

[0119] (9) Variation I The adsorbent 181 is preferably supported on the first surface 182 so that the amount of heat or cold generated from the adsorbent 181 when the refrigerant is adsorbed or desorbed onto the adsorbent 181 increases along the second direction in which the heat medium flows through the second space 164b.

[0120] Specifically, the adsorbent 181 is supported on the first surface 182 so that the amount of the adsorbent 181 supported on the first surface 182 varies along the second direction. For example, the adsorbent 181 is supported on the first surface 182 so that the thickness of the adsorbent 181 supported on the first surface 182 varies along the second direction. Furthermore, the adsorbent 181 is supported on the first surface 182 so that the type of the adsorbent 181 supported on the first surface 182 varies along the second direction.

[0121] The amount of heat generated when the metal-organic framework used as the adsorbent 181 adsorbs a refrigerant varies depending on the types of metal ions and organic ligands constituting the metal-organic framework and the amount of the metal-organic framework used. Therefore, by appropriately selecting the amount and type of the metal-organic framework used, it is possible to improve the efficiency of recovering hot and cold energy by the heat transfer medium.

[0122] (10) Variation J In the above embodiment, the first adsorption region 121 and the second adsorption region 122 have the same type of heat recovery member. However, the first adsorption region 121 and the second adsorption region 122 may have different types of heat recovery members.

[0123] (11) Variation K The adsorbent used in the refrigeration device 100 is a metal-organic framework. However, materials other than the metal-organic framework may also be used as the adsorbent. Examples of materials other than the metal-organic framework include activated carbon, zeolite-based materials, silica-based materials, and alumina-based materials.

[0124] (12) Variation L In the above embodiment, the heat recovery member 160 is of a cross-fin type, but is not particularly limited to this.

[0125] The heat recovery member 160 may be, for example, a corrugated fin type, a shell and heat transfer tube type, a double tube type, or a plate type.

[0126] Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure as defined in the claims. [Explanation of symbols]

[0127] 100: Refrigeration equipment 101: Heat source side circuit 102:Using circuit 105: Control unit 111: refrigerant flow path 112: Heat transfer medium flow path 121: 1st adsorption area 122:Second adsorption area 131: Compressor 135: Switching mechanism 160: Heat recovery component 161: Multiple Fins 162: Heat transfer tube 163: Casing 163a: Inlet 163b: Outlet 163x: Inner casing 163y: Outer casing 173: 1st adjustment mechanism 173a: First switching valve 175:Second adjustment mechanism 175a: Second switching valve 181: Adsorbent 182: 1st surface S: Refrigerant introduction space [Prior art documents] [Patent documents]

[0128] [Patent Document 1] US Patent Application Publication No. 2023 / 0417459

Claims

1. A compressor (131); a first adsorption region (121); a second adsorption region (122); A switching mechanism (135); a refrigerant flow path (111) through which a refrigerant flows; A control unit (105) for changing an operation mode; Equipped with The compressor draws in and compresses a low-pressure refrigerant and discharges it as a high-pressure refrigerant, The first adsorption region and the second adsorption region have an adsorbent (181) that adsorbs and desorbs the refrigerant in response to a change in pressure of the refrigerant, The switching mechanism switches the refrigerant flow path a first state in which the first adsorption area is connected to the discharge side of the compressor, causing the first adsorption area to be in a high-pressure state, and the second adsorption area is connected to the suction side of the compressor, causing the second adsorption area to be in a low-pressure state; a second state in which the first adsorption area is connected to the suction side of the compressor, causing the first adsorption area to be in a low-pressure state, and the second adsorption area is connected to the discharge side of the compressor, causing the second adsorption area to be in a high-pressure state; and can be switched between The operation mode is a first operation mode in which the adsorption area of ​​the adsorbent in the first adsorption region or the second adsorption region is a first value; a second operation mode in which the adsorption area is a second value different from the first value; Including, Refrigeration equipment.

2. The first adsorption region or the second adsorption region is partitioned into a plurality of spaces (S) to which the refrigerant can be supplied. The refrigeration system of claim 1.

3. Further provided is a first adjustment mechanism (173) for adjusting the number of spaces, The control unit controls the first adjustment mechanism to change the operation mode.

3. The refrigeration system of claim 2.

4. the first adjustment mechanism includes a first switching valve (174) that opens and closes a flow path connecting the plurality of spaces, The control unit controls the first switching valve to change the operation mode.

4. The refrigeration system of claim 3.

5. A plurality of the first adsorption regions or a plurality of the second adsorption regions; Further provided with The refrigeration system of claim 1.

6. a second adjustment mechanism (175) that adjusts the number of the first adsorption regions or the second adsorption regions that operate in the first operation mode or the second operation mode, The control unit controls the second adjustment mechanism to change the operation mode.

6. The refrigeration system of claim 5.

7. the second adjustment mechanism includes a second switching valve (176) that opens and closes a flow path connecting the plurality of first adsorption regions or the plurality of second adsorption regions, The control unit controls the second switching valve to change the operation mode.

7. The refrigeration system of claim 6.

8. The adsorbent includes a metal organic framework including a metal ion and an organic ligand. The refrigeration device according to any one of claims 1 to 7.

9. The refrigerant is selected from the group consisting of carbon dioxide, hydrocarbon refrigerants, ammonia, and water. The refrigeration device according to any one of claims 1 to 7.

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